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When dumping loaded modules, we print them one by one in separate printks. Let's use pr_cont as they are continuation prints. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
Jiri Slaby
authored and
 Rusty Russell
commited |
27bba4d6bb | |
Add missing \n and also follow commit
Tetsuo Handa
authored and
Rusty Russell
commited |
22e669568d | |
Cheers, Rusty. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.14 (GNU/Linux) iQIcBAABAgAGBQJSe3ngAAoJENkgDmzRrbjxqkMP/jFwTIVy+tZbPL36xR4C7UI/ JZ9JU2c2HTyAtqp/T/bljA0QUDQWUASCfwG5WmRgyvMkEwhfuGrQ3dveQLRq5iKD Ln/LIN8JXXijhRr+ywhXLAcp1P5ysSJJYYS5lZTCmJ2Cv9jnAvmUl0KqdTEx+ZNH YsWBiI9+WmwhODiAdUlqtThDK37w8OsWeMq2agf97bBERlRYnRZvzwy3tSP2mf5j 4wx8viOdzPC7NVblyX1cj3gonFFQJtMI4s/e787QzkUpNQjvrN3XecPiQX6aBCX3 seVjuv6panv1tw1HqyU1KXWo7fs2uCc9mVR5Rr3Zok+8qpKWkj0dyCnF3A+ufsrO vlkrFLUsv/U1NUkWJM6mJKzMjKRD4iF702QsEEpNA5rlOsAMMGSSlju4eu6GvadI ZJ+ZDaNWUDPbWa9Xgjyp+DKWR6vybNgEHZmLmcCdeLt1u8Th1E/ujsKxv4SN6eIO 2v+lNPjGEivoNXUX52toRZ1324U3FFzburCSA0c55+r1sjPT6SXCfl8kISSKvVtt iFemsDxhaSwqVzqbsx3ztU010Z0f9uVbpZHAQgZ514Uk25HtwhkaQSdiIP+cPXE8 rClzj9m4gD+Jy0T+P0HjPlSxKCGSlgLiEBWEigX36/F4Isv+GL1HjvrGGCWM4VnO lIyw5ux/UH8USct9nH4x =xg2p -----END PGP SIGNATURE----- Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module updates from Rusty Russell: "Mainly boring here, too. rmmod --wait finally removed, though" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: modpost: fix bogus 'exported twice' warnings. init: fix in-place parameter modification regression asmlinkage, module: Make ksymtab and kcrctab symbols and __this_module __visible kernel: add support for init_array constructors modpost: Optionally ignore secondary errors seen if a single module build fails module: remove rmmod --wait option. 
Linus Torvalds
commited |
ce6513f758 | |
kernel/module.c uses a mix of printk(KERN_foo and pr_foo(). Convert it all to pr_foo and make the offered cleanups. Not sure what to do about the printk(KERN_DEFAULT). We don't have a pr_default(). Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Joe Perches <joe@perches.com> Cc: Frantisek Hrbata <fhrbata@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Andrew Morton
authored and
Linus Torvalds
commited |
bddb12b32f | |
This adds the .init_array section as yet another section with constructors. This
is needed because gcc could add __gcov_init calls to .init_array or .ctors
section, depending on gcc (and binutils) version .
v2: - reuse mod->ctors for .init_array section for modules, because gcc uses
.ctors or .init_array, but not both at the same time
v3: - fail to load if that does happen somehow.
Signed-off-by: Frantisek Hrbata <fhrbata@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Frantisek Hrbata
authored and
Rusty Russell
commited |
eb3057df73 | |
The option to wait for a module reference count to reach zero was in the initial module implementation, but it was never supported in modprobe (you had to use rmmod --wait). After discussion with Lucas, It has been deprecated (with a 10 second sleep) in kmod for the last year. This finally removes it: the flag will evoke a printk warning and a normal (non-blocking) remove attempt. Cc: Lucas De Marchi <lucas.de.marchi@gmail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
3f2b9c9cdf | |
Pull vfs pile 1 from Al Viro:
"Unfortunately, this merge window it'll have a be a lot of small piles -
my fault, actually, for not keeping #for-next in anything that would
resemble a sane shape ;-/
This pile: assorted fixes (the first 3 are -stable fodder, IMO) and
cleanups + %pd/%pD formats (dentry/file pathname, up to 4 last
components) + several long-standing patches from various folks.
There definitely will be a lot more (starting with Miklos'
check_submount_and_drop() series)"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (26 commits)
direct-io: Handle O_(D)SYNC AIO
direct-io: Implement generic deferred AIO completions
add formats for dentry/file pathnames
kvm eventfd: switch to fdget
powerpc kvm: use fdget
switch fchmod() to fdget
switch epoll_ctl() to fdget
switch copy_module_from_fd() to fdget
git simplify nilfs check for busy subtree
ibmasmfs: don't bother passing superblock when not needed
don't pass superblock to hypfs_{mkdir,create*}
don't pass superblock to hypfs_diag_create_files
don't pass superblock to hypfs_vm_create_files()
oprofile: get rid of pointless forward declarations of struct super_block
oprofilefs_create_...() do not need superblock argument
oprofilefs_mkdir() doesn't need superblock argument
don't bother with passing superblock to oprofile_create_stats_files()
oprofile: don't bother with passing superblock to ->create_files()
don't bother passing sb to oprofile_create_files()
coh901318: don't open-code simple_read_from_buffer()
...
Linus Torvalds
commited |
45d9a2220f | |
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> 
Al Viro
commited |
a2e0578be3 | |
DEBUG_KOBJECT_RELEASE helps to find the issue attached below. After some investigation, it seems the reason is: The mod->mkobj.kobj(ffffffffa01600d0 below) is freed together with mod itself in free_module(). However, its children still hold references to it, as the delay caused by DEBUG_KOBJECT_RELEASE. So when the child(holders below) tries to decrease the reference count to its parent in kobject_del(), BUG happens as it tries to access already freed memory. This patch tries to fix it by waiting for the mod->mkobj.kobj to be really released in the module removing process (and some error code paths). [ 1844.175287] kobject: 'holders' (ffff88007c1f1600): kobject_release, parent ffffffffa01600d0 (delayed) [ 1844.178991] kobject: 'notes' (ffff8800370b2a00): kobject_release, parent ffffffffa01600d0 (delayed) [ 1845.180118] kobject: 'holders' (ffff88007c1f1600): kobject_cleanup, parent ffffffffa01600d0 [ 1845.182130] kobject: 'holders' (ffff88007c1f1600): auto cleanup kobject_del [ 1845.184120] BUG: unable to handle kernel paging request at ffffffffa01601d0 [ 1845.185026] IP: [<ffffffff812cda81>] kobject_put+0x11/0x60 [ 1845.185026] PGD 1a13067 PUD 1a14063 PMD 7bd30067 PTE 0 [ 1845.185026] Oops: 0000 [#1] PREEMPT [ 1845.185026] Modules linked in: xfs libcrc32c [last unloaded: kprobe_example] [ 1845.185026] CPU: 0 PID: 18 Comm: kworker/0:1 Tainted: G O 3.11.0-rc6-next-20130819+ #1 [ 1845.185026] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [ 1845.185026] Workqueue: events kobject_delayed_cleanup [ 1845.185026] task: ffff88007ca51f00 ti: ffff88007ca5c000 task.ti: ffff88007ca5c000 [ 1845.185026] RIP: 0010:[<ffffffff812cda81>] [<ffffffff812cda81>] kobject_put+0x11/0x60 [ 1845.185026] RSP: 0018:ffff88007ca5dd08 EFLAGS: 00010282 [ 1845.185026] RAX: 0000000000002000 RBX: ffffffffa01600d0 RCX: ffffffff8177d638 [ 1845.185026] RDX: ffff88007ca5dc18 RSI: 0000000000000000 RDI: ffffffffa01600d0 [ 1845.185026] RBP: ffff88007ca5dd18 R08: ffffffff824e9810 R09: ffffffffffffffff [ 1845.185026] R10: ffff8800ffffffff R11: dead4ead00000001 R12: ffffffff81a95040 [ 1845.185026] R13: ffff88007b27a960 R14: ffff88007c1f1600 R15: 0000000000000000 [ 1845.185026] FS: 0000000000000000(0000) GS:ffffffff81a23000(0000) knlGS:0000000000000000 [ 1845.185026] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 1845.185026] CR2: ffffffffa01601d0 CR3: 0000000037207000 CR4: 00000000000006b0 [ 1845.185026] Stack: [ 1845.185026] ffff88007c1f1600 ffff88007c1f1600 ffff88007ca5dd38 ffffffff812cdb7e [ 1845.185026] 0000000000000000 ffff88007c1f1640 ffff88007ca5dd68 ffffffff812cdbfe [ 1845.185026] ffff88007c974800 ffff88007c1f1640 ffff88007ff61a00 0000000000000000 [ 1845.185026] Call Trace: [ 1845.185026] [<ffffffff812cdb7e>] kobject_del+0x2e/0x40 [ 1845.185026] [<ffffffff812cdbfe>] kobject_delayed_cleanup+0x6e/0x1d0 [ 1845.185026] [<ffffffff81063a45>] process_one_work+0x1e5/0x670 [ 1845.185026] [<ffffffff810639e3>] ? process_one_work+0x183/0x670 [ 1845.185026] [<ffffffff810642b3>] worker_thread+0x113/0x370 [ 1845.185026] [<ffffffff810641a0>] ? rescuer_thread+0x290/0x290 [ 1845.185026] [<ffffffff8106bfba>] kthread+0xda/0xe0 [ 1845.185026] [<ffffffff814ff0f0>] ? _raw_spin_unlock_irq+0x30/0x60 [ 1845.185026] [<ffffffff8106bee0>] ? kthread_create_on_node+0x130/0x130 [ 1845.185026] [<ffffffff8150751a>] ret_from_fork+0x7a/0xb0 [ 1845.185026] [<ffffffff8106bee0>] ? kthread_create_on_node+0x130/0x130 [ 1845.185026] Code: 81 48 c7 c7 28 95 ad 81 31 c0 e8 9b da 01 00 e9 4f ff ff ff 66 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb 48 83 ec 08 48 85 ff 74 1d <f6> 87 00 01 00 00 01 74 1e 48 8d 7b 38 83 6b 38 01 0f 94 c0 84 [ 1845.185026] RIP [<ffffffff812cda81>] kobject_put+0x11/0x60 [ 1845.185026] RSP <ffff88007ca5dd08> [ 1845.185026] CR2: ffffffffa01601d0 [ 1845.185026] ---[ end trace 49a70afd109f5653 ]--- Signed-off-by: Li Zhong <zhong@linux.vnet.ibm.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
Li Zhong
authored and
Rusty Russell
commited |
942e443127 | |
For some strings, they are permitted to be larger than PAGE_SIZE, so need use scnprintf() instead of sprintf(), or it will cause issue. One case is: if a module version is crazy defined (length more than PAGE_SIZE), 'modinfo' command is still OK (print full contents), but for "cat /sys/modules/'modname'/version", will cause issue in kernel. Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
Chen Gang
authored and
Rusty Russell
commited |
cc56ded3fd | |
The ops that uses param_set_bool_enable_only() as its set function can easily handle being used without an argument. There's no reason to fail the loading of the module if it does not have one. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
Steven Rostedt
authored and
Rusty Russell
commited |
0ce814096f | |
ignore that. Cheers, Rusty. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQIcBAABAgAGBQJR3NrgAAoJENkgDmzRrbjxaQ0P/RwaKDlmrrFiFD6yYZRQKM1G esv3H5j3jU29Eo5WvY1IEoWbMCK4ObL9DL86CCL/XgYZIhJfTiND+R2W8XBSEXec qwJXb3oMWVMDBBnxknl/pf0RWhwaFwxsQ89Yco6zsGTWQ0kB6+PAaUNOh91MBOYJ UM3nJD79Xqv9X/WcTtPNUmVmmZ7WJFqQ3UYhpTL2WRfRnEO/ku8GwAvLunSFuLBP iI4IjSMM8ssLL10g3Cm7J/pzLTTRctmjEZzIclACUrAgm3V+s1NeARztKZiuCVoz 3Eu0VIp5t2rvifOajj0UF0pdO8Q3XpsMj+lr21gg2rc2VTHKZ3oobEzGX7Ev0lae BH1DdW3ivgyq3cBi56Dh3aZDggF24h+QO6qN92s73l0qYK1t+eAg1qc76lsayclB ozJJD9/xuEqLV3GScbMdqb4AxTc6Y0ks0SWD07PvoQkthH/2tPiLpSvrITdKdCrY 0+RssMuO4StM1e8ALjHqDz+/2k8MS70b0e8JUp0e1WaKzMUKKUYZIqQTGqczHH7u 4hWJiSMnsZqzLLKUX2A6nVlg0eo6zgyqHuxk6O4fHghXWOJJlLjWcMQW26dBS3ki FpWYsJeHw6HcITcbWXkdozygf0GOwiaHaI6ivVnB3L8spc6VFD4gvDpbcpAeixGX BfFA7nG/Hy3aOT05juMj =OVO/ -----END PGP SIGNATURE----- Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module updates from Rusty Russell: "Nothing interesting. Except the most embarrassing bugfix ever. But let's ignore that" * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: module: cleanup call chain. module: do percpu allocation after uniqueness check. No, really! modules: don't fail to load on unknown parameters. ABI: Clarify when /sys/module/MODULENAME is created There is no /sys/parameters module: don't modify argument of module_kallsyms_lookup_name()
Linus Torvalds
commited |
8133633368 | |
Fold alloc_module_percpu into percpu_modalloc(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
9eb76d7797 | |
v3.8-rc1-5-g1fb9341 was supposed to stop parallel kvm loads exhausting
percpu memory on large machines:
Now we have a new state MODULE_STATE_UNFORMED, we can insert the
module into the list (and thus guarantee its uniqueness) before we
allocate the per-cpu region.
In my defence, it didn't actually say the patch did this. Just that
we "can".
This patch actually *does* it.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Tested-by: Jim Hull <jim.hull@hp.com>
Cc: stable@kernel.org # 3.8
Rusty Russell
commited |
8d8022e8ab | |
Although parameters are supposed to be part of the kernel API, experimental parameters are often removed. In addition, downgrading a kernel might cause previously-working modules to fail to load. On balance, it's probably better to warn, and load the module anyway. This may let through a typo, but at least the logs will show it. Reported-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
54041d8a73 | |
If we pass a pointer to a const string in the form "module:symbol" module_kallsyms_lookup_name() will try to split the string at the colon, i.e., will try to modify r/o data. That will, in fact, fail on a kernel with enabled CONFIG_DEBUG_RODATA. Avoid modifying the passed string in module_kallsyms_lookup_name(), modify find_module_all() instead to pass it the module name length. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
Mathias Krause
authored and
Rusty Russell
commited |
4f6de4d51f | |
As kmemleak now scans all module sections that are allocated, writable and non executable, there's no need to scan individual sections that might reference data. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Steven Rostedt
authored and
 Catalin Marinas
commited |
89c837351d | |
Instead of just picking data sections by name (names that start with .data, .bss or .ref.data), use the section flags and scan all sections that are allocated, writable and not executable. Which should cover all sections of a module that might reference data. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> [catalin.marinas@arm.com: removed unused 'name' variable] [catalin.marinas@arm.com: collapsed 'if' blocks] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Steven Rostedt
authored and
Catalin Marinas
commited |
06c9494c0e | |
Otherwise we get a race between unload and reload of the same module: the new module doesn't see the old one in the list, but then fails because it can't register over the still-extant entries in sysfs: [ 103.981925] ------------[ cut here ]------------ [ 103.986902] WARNING: at fs/sysfs/dir.c:536 sysfs_add_one+0xab/0xd0() [ 103.993606] Hardware name: CrownBay Platform [ 103.998075] sysfs: cannot create duplicate filename '/module/pch_gbe' [ 104.004784] Modules linked in: pch_gbe(+) [last unloaded: pch_gbe] [ 104.011362] Pid: 3021, comm: modprobe Tainted: G W 3.9.0-rc5+ #5 [ 104.018662] Call Trace: [ 104.021286] [<c103599d>] warn_slowpath_common+0x6d/0xa0 [ 104.026933] [<c1168c8b>] ? sysfs_add_one+0xab/0xd0 [ 104.031986] [<c1168c8b>] ? sysfs_add_one+0xab/0xd0 [ 104.037000] [<c1035a4e>] warn_slowpath_fmt+0x2e/0x30 [ 104.042188] [<c1168c8b>] sysfs_add_one+0xab/0xd0 [ 104.046982] [<c1168dbe>] create_dir+0x5e/0xa0 [ 104.051633] [<c1168e78>] sysfs_create_dir+0x78/0xd0 [ 104.056774] [<c1262bc3>] kobject_add_internal+0x83/0x1f0 [ 104.062351] [<c126daf6>] ? kvasprintf+0x46/0x60 [ 104.067231] [<c1262ebd>] kobject_add_varg+0x2d/0x50 [ 104.072450] [<c1262f07>] kobject_init_and_add+0x27/0x30 [ 104.078075] [<c1089240>] mod_sysfs_setup+0x80/0x540 [ 104.083207] [<c1260851>] ? module_bug_finalize+0x51/0xc0 [ 104.088720] [<c108ab29>] load_module+0x1429/0x18b0 We can teardown sysfs first, then to be sure, put the state in MODULE_STATE_UNFORMED so it's ignored while we deconstruct it. Reported-by: Veaceslav Falico <vfalico@redhat.com> Tested-by: Veaceslav Falico <vfalico@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
944a1fa012 | |
Fix symbol versioning on architectures with symbol prefixes. Although the build was free from warnings the actual modules still wouldn't load as the ____versions table contained unprefixed symbol names, which were being compared against the prefixed symbol names when checking the symbol versions. This is fixed by modifying modpost to add the symbol prefix to the ____versions table it outputs (Modules.symvers still contains unprefixed symbol names). The check_modstruct_version() function is also fixed as it checks the version of the unprefixed "module_layout" symbol which would no longer work. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Michal Marek <mmarek@suse.cz> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jonathan Kliegman <kliegs@chromium.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (use VMLINUX_SYMBOL_STR) 
James Hogan
authored and
Rusty Russell
commited |
a4b6a77b77 | |
We have CONFIG_SYMBOL_PREFIX, which three archs define to the string "_". But Al Viro broke this in "consolidate cond_syscall and SYSCALL_ALIAS declarations" (in linux-next), and he's not the first to do so. Using CONFIG_SYMBOL_PREFIX is awkward, since we usually just want to prefix it so something. So various places define helpers which are defined to nothing if CONFIG_SYMBOL_PREFIX isn't set: 1) include/asm-generic/unistd.h defines __SYMBOL_PREFIX. 2) include/asm-generic/vmlinux.lds.h defines VMLINUX_SYMBOL(sym) 3) include/linux/export.h defines MODULE_SYMBOL_PREFIX. 4) include/linux/kernel.h defines SYMBOL_PREFIX (which differs from #7) 5) kernel/modsign_certificate.S defines ASM_SYMBOL(sym) 6) scripts/modpost.c defines MODULE_SYMBOL_PREFIX 7) scripts/Makefile.lib defines SYMBOL_PREFIX on the commandline if CONFIG_SYMBOL_PREFIX is set, so that we have a non-string version for pasting. (arch/h8300/include/asm/linkage.h defines SYMBOL_NAME(), too). Let's solve this properly: 1) No more generic prefix, just CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX. 2) Make linux/export.h usable from asm. 3) Define VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR(). 4) Make everyone use them. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Reviewed-by: James Hogan <james.hogan@imgtec.com> Tested-by: James Hogan <james.hogan@imgtec.com> (metag)
Rusty Russell
commited |
b92021b09d | |
Pull vfs pile (part one) from Al Viro: "Assorted stuff - cleaning namei.c up a bit, fixing ->d_name/->d_parent locking violations, etc. The most visible changes here are death of FS_REVAL_DOT (replaced with "has ->d_weak_revalidate()") and a new helper getting from struct file to inode. Some bits of preparation to xattr method interface changes. Misc patches by various people sent this cycle *and* ocfs2 fixes from several cycles ago that should've been upstream right then. PS: the next vfs pile will be xattr stuff." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (46 commits) saner proc_get_inode() calling conventions proc: avoid extra pde_put() in proc_fill_super() fs: change return values from -EACCES to -EPERM fs/exec.c: make bprm_mm_init() static ocfs2/dlm: use GFP_ATOMIC inside a spin_lock ocfs2: fix possible use-after-free with AIO ocfs2: Fix oops in ocfs2_fast_symlink_readpage() code path get_empty_filp()/alloc_file() leave both ->f_pos and ->f_version zero target: writev() on single-element vector is pointless export kernel_write(), convert open-coded instances fs: encode_fh: return FILEID_INVALID if invalid fid_type kill f_vfsmnt vfs: kill FS_REVAL_DOT by adding a d_weak_revalidate dentry op nfsd: handle vfs_getattr errors in acl protocol switch vfs_getattr() to struct path default SET_PERSONALITY() in linux/elf.h ceph: prepopulate inodes only when request is aborted d_hash_and_lookup(): export, switch open-coded instances 9p: switch v9fs_set_create_acl() to inode+fid, do it before d_instantiate() 9p: split dropping the acls from v9fs_set_create_acl() ...
Linus Torvalds
commited |
d895cb1af1 | |
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Al Viro
commited |
3dadecce20 | |
|
a3535c7e4f | |
Fix up all callers as they were before, with make one change: an unsigned module taints the kernel, but doesn't turn off lockdep. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
373d4d0997 | |
Reported-by: Chris Samuel <chris@csamuel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
64748a2c90 | |
Commit
Linus Torvalds
commited |
ee61abb322 | |
problem introduced recently by kvm id changes. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJQ/IaJAAoJENkgDmzRrbjxOjAQAIrI9+Jo3Lsxk1v9gXeo9xn2 ST4LNv7/oW2+3NFBOkKsGVpcXe1JtGySIXyx9k+dELPa5xe4Rs4HE3pHQj/VoEx8 FKz3oUXSHkuh+paKuFXvZ2u/z0/FI99GmqHPObvGQ4iS3hTXAibzO83yYYPxwApq Zq4kof/dAcVVPLm8fGVAMPA2Rbh/WmjDfrIv8gv71QkDjtRLzcr40VIgky5cvu7V FWcBl4/DVoKkGnDPsLDhLK9QGqgBGhFIlNIcVX4Jv50DiCibOyzdjeUXYxMftoGr Rw56hHwGpPdqbRIjBkR071vIl/mlXTmxIv+d77vZNBin2MIBwAzCQXo8I1/HojCK /wKhI+RFj0J5DaDo/BTB80cmI3X2oah5sRUebW6vd9HjunhFFndg4mVeDNPa0E0+ F72xWlj79BjdIOuD06TLg6Tg2klL49nC8bUc0wrsh6onEjhd9v7Cp/X/rxi5cKYW eEv3oLkKwUHoheF9gBlpnT0Yyl/HpFe+nemblzj/ybRKnk4A5vtJqV9eZnqoOS16 lgIkKOpgXT9dzSom2EL/f4sMCeLLYC44DQwOvxNKt/BdMY0r5y8OLaJORXQGfEDF Ztvu2G8PmELxV0B3JZcGR/zOcKxpOBsrGoVn0/EQIul3A/0C0ID7i5zwJAyX6LP7 V+6vyF2eHMf10tB0rbfB =SpOo -----END PGP SIGNATURE----- Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module fixes and a virtio block fix from Rusty Russell: "Various minor fixes, but a slightly more complex one to fix the per-cpu overload problem introduced recently by kvm id changes." * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: module: put modules in list much earlier. module: add new state MODULE_STATE_UNFORMED. module: prevent warning when finit_module a 0 sized file virtio-blk: Don't free ida when disk is in use
Linus Torvalds
commited |
226364766f | |
If the default iosched is built as module, the kernel may deadlock while trying to load the iosched module on device probe if the probing was running off async. This is because async_synchronize_full() at the end of module init ends up waiting for the async job which initiated the module loading. async A modprobe 1. finds a device 2. registers the block device 3. request_module(default iosched) 4. modprobe in userland 5. load and init module 6. async_synchronize_full() Async A waits for modprobe to finish in request_module() and modprobe waits for async A to finish in async_synchronize_full(). Because there's no easy to track dependency once control goes out to userland, implementing properly nested flushing is difficult. For now, make module init perform async_synchronize_full() iff module init has queued async jobs as suggested by Linus. This avoids the described deadlock because iosched module doesn't use async and thus wouldn't invoke async_synchronize_full(). This is hacky and incomplete. It will deadlock if async module loading nests; however, this works around the known problem case and seems to be the best of bad options. For more details, please refer to the following thread. http://thread.gmane.org/gmane.linux.kernel/1420814 Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Alex Riesen <raa.lkml@gmail.com> Tested-by: Ming Lei <ming.lei@canonical.com> Tested-by: Alex Riesen <raa.lkml@gmail.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Tejun Heo
authored and
Linus Torvalds
commited |
774a1221e8 | |
Prarit's excellent bug report:
> In recent Fedora releases (F17 & F18) some users have reported seeing
> messages similar to
>
> [ 15.478160] kvm: Could not allocate 304 bytes percpu data
> [ 15.478174] PERCPU: allocation failed, size=304 align=32, alloc from
> reserved chunk failed
>
> during system boot. In some cases, users have also reported seeing this
> message along with a failed load of other modules.
>
> What is happening is systemd is loading an instance of the kvm module for
> each cpu found (see commit
Rusty Russell
commited |
1fb9341ac3 | |
You should never look at such a module, so it's excised from all paths which traverse the modules list. We add the state at the end, to avoid gratuitous ABI break (ksplice). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
0d21b0e347 | |
If we try to finit_module on a file sized 0 bytes vmalloc will scream and spit out a warning. Since modules have to be bigger than 0 bytes anyways we can just check that beforehand and avoid the warning. Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
Sasha Levin
authored and
Rusty Russell
commited |
52441fa8f2 | |
to verify the source of the module (ChromeOS) and/or use standard IMA on it or other security hooks. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABAgAGBQJQ0VKlAAoJENkgDmzRrbjxjuEQALVHpD1cSmryOzVwkNn7rVGP PV3KVbUs+qzUCm2c3AafIIlSBm2LOUl+cR3uNC7di8aHarRF3VHkK2OQ4Fx97ECd KKBqAyY3R0q1mAKujb/MWwiK0YgosEDIOzGGn2yQhNFsxKqnMB02P4j82IO7+g+w Cc3XuDyWHoH2I+ySgz0Q8NHAqufD/DMZUKud7jw2Lsv6PuICJ1Oqgl/Gd/muxort 4a5tV3tjhRGywHS/8b2fbDUXkybC5NKK0FN+gyoaROmJ/THeHEQDGXZT9bc2vmVx HvRy/5k8dzQ6LAJ2mLnPvy0pmv0u7NYMvjxTxxUlUkFMkYuVticikQfwSYDbDPt4 mbsLxchpgi8z4x8HltEERffCX5tldo/5hz1uemqhqIsMRIrRFnlHkSIgkGjVHf2u LXQBLT8uTm6C0VyNQPrI/hUZzIax7WtKbPSoK9lmExNbKqloEFh/mVXvfQxei2kp wnUZcnmPIqSvw7b4CWu7HibMYu2VvGBgm3YIfJRi4AQme1mzFYLpZoxF5Pj+Ykbt T//Hb1EsNQTTFCg7MZhnJSAw/EVUvNDUoullORClyqw6+xxjVKqWpPJgYDRfWOlJ Xa+s7DNrL+Oo1WWR8l5ruoQszbR8szIyeyPKKxRUcQj2zsqghoWuzKAx2saSEw3W pNkoJU+dGC7kG/yVAS8N =uoJj -----END PGP SIGNATURE----- Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux Pull module update from Rusty Russell: "Nothing all that exciting; a new module-from-fd syscall for those who want to verify the source of the module (ChromeOS) and/or use standard IMA on it or other security hooks." * tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: MODSIGN: Fix kbuild output when using default extra_certificates MODSIGN: Avoid using .incbin in C source modules: don't hand 0 to vmalloc. module: Remove a extra null character at the top of module->strtab. ASN.1: Use the ASN1_LONG_TAG and ASN1_INDEFINITE_LENGTH constants ASN.1: Define indefinite length marker constant moduleparam: use __UNIQUE_ID() __UNIQUE_ID() MODSIGN: Add modules_sign make target powerpc: add finit_module syscall. ima: support new kernel module syscall add finit_module syscall to asm-generic ARM: add finit_module syscall to ARM security: introduce kernel_module_from_file hook module: add flags arg to sys_finit_module() module: add syscall to load module from fd
Linus Torvalds
commited |
7a684c452e | |
In commit
Tao Ma
authored and
Linus Torvalds
commited |
8ec7d50f1e | |
In commit
Rusty Russell
commited |
82fab442f5 | |
There is a extra null character('\0') at the top of module->strtab for
each module. Commit
Satoru Takeuchi
authored and
Rusty Russell
commited |
54523ec71f | |
Now that kernel module origins can be reasoned about, provide a hook to the LSMs to make policy decisions about the module file. This will let Chrome OS enforce that loadable kernel modules can only come from its read-only hash-verified root filesystem. Other LSMs can, for example, read extended attributes for signatures, etc. Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Serge E. Hallyn <serge.hallyn@canonical.com> Acked-by: Eric Paris <eparis@redhat.com> Acked-by: Mimi Zohar <zohar@us.ibm.com> Acked-by: James Morris <james.l.morris@oracle.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
Kees Cook
authored and
Rusty Russell
commited |
2e72d51b4a | |
Thanks to Michael Kerrisk for keeping us honest. These flags are actually useful for eliminating the only case where kmod has to mangle a module's internals: for overriding module versioning. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Lucas De Marchi <lucas.demarchi@profusion.mobi> Acked-by: Kees Cook <keescook@chromium.org>
Rusty Russell
commited |
2f3238aebe | |
As part of the effort to create a stronger boundary between root and kernel, Chrome OS wants to be able to enforce that kernel modules are being loaded only from our read-only crypto-hash verified (dm_verity) root filesystem. Since the init_module syscall hands the kernel a module as a memory blob, no reasoning about the origin of the blob can be made. Earlier proposals for appending signatures to kernel modules would not be useful in Chrome OS, since it would involve adding an additional set of keys to our kernel and builds for no good reason: we already trust the contents of our root filesystem. We don't need to verify those kernel modules a second time. Having to do signature checking on module loading would slow us down and be redundant. All we need to know is where a module is coming from so we can say yes/no to loading it. If a file descriptor is used as the source of a kernel module, many more things can be reasoned about. In Chrome OS's case, we could enforce that the module lives on the filesystem we expect it to live on. In the case of IMA (or other LSMs), it would be possible, for example, to examine extended attributes that may contain signatures over the contents of the module. This introduces a new syscall (on x86), similar to init_module, that has only two arguments. The first argument is used as a file descriptor to the module and the second argument is a pointer to the NULL terminated string of module arguments. Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (merge fixes)
Kees Cook
authored and
Rusty Russell
commited |
34e1169d99 | |
Masaki found and patched a kallsyms issue: the last symbol in a
module's symtab wasn't transferred. This is because we manually copy
the zero'th entry (which is always empty) then copy the rest in a loop
starting at 1, though from src[0]. His fix was minimal, I prefer to
rewrite the loops in more standard form.
There are two loops: one to get the size, and one to copy. Make these
identical: always count entry 0 and any defined symbol in an allocated
non-init section.
This bug exists since the following commit was introduced.
module: reduce symbol table for loaded modules (v2)
commit:
Rusty Russell
commited |
59ef28b1f1 | |
Emit the magic string that indicates a module has a signature after the signature data instead of before it. This allows module_sig_check() to be made simpler and faster by the elimination of the search for the magic string. Instead we just need to do a single memcmp(). This works because at the end of the signature data there is the fixed-length signature information block. This block then falls immediately prior to the magic number. From the contents of the information block, it is trivial to calculate the size of the signature data and thus the size of the actual module data. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
David Howells
authored and
Linus Torvalds
commited |
caabe24057 | |
If we're in FIPS mode, we should panic if we fail to verify the signature on a module or we're asked to load an unsigned module in signature enforcing mode. Possibly FIPS mode should automatically enable enforcing mode. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
David Howells
authored and
Rusty Russell
commited |
1d0059f3a4 | |
We do a very simple search for a particular string appended to the module (which is cache-hot and about to be SHA'd anyway). There's both a config option and a boot parameter which control whether we accept or fail with unsigned modules and modules that are signed with an unknown key. If module signing is enabled, the kernel will be tainted if a module is loaded that is unsigned or has a signature for which we don't have the key. (Useful feedback and tweaks by David Howells <dhowells@redhat.com>) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
106a4ee258 | |
The original module-init-tools module loader used a fnctl lock on the .ko file to avoid attempts to simultaneously load a module. Unfortunately, you can't get an exclusive fcntl lock on a read-only fd, making this not work for read-only mounted filesystems. module-init-tools has a hacky sleep-and-loop for this now. It's not that hard to wait in the kernel, and only return -EEXIST once the first module has finished loading (or continue loading the module if the first one failed to initialize for some reason). It's also consistent with what we do for dependent modules which are still loading. Suggested-by: Lucas De Marchi <lucas.demarchi@profusion.mobi> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
9bb9c3be56 | |
We use resolve_symbol_wait(), which blocks if the module containing the symbol is still loading. However: 1) The module_wq we use is only woken after calling the modules' init function, but there are other failure paths after the module is placed in the linked list where we need to do the same thing. 2) wake_up() only wakes one waiter, and our waitqueue is shared by all modules, so we need to wake them all. 3) wake_up_all() doesn't imply a memory barrier: I feel happier calling it after we've grabbed and dropped the module_mutex, not just after the state assignment. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Rusty Russell
commited |
6f13909f4f | |
Use the mapping of Elf_[SPE]hdr, Elf_Addr, Elf_Sym, Elf_Dyn, Elf_Rel/Rela,
ELF_R_TYPE() and ELF_R_SYM() to either the 32-bit version or the 64-bit version
into asm-generic/module.h for all arches bar MIPS.
Also, use the generic definition mod_arch_specific where possible.
To this end, I've defined three new config bools:
(*) HAVE_MOD_ARCH_SPECIFIC
Arches define this if they don't want to use the empty generic
mod_arch_specific struct.
(*) MODULES_USE_ELF_RELA
Arches define this if their modules can contain RELA records. This causes
the Elf_Rela mapping to be emitted and allows apply_relocate_add() to be
defined by the arch rather than have the core emit an error message.
(*) MODULES_USE_ELF_REL
Arches define this if their modules can contain REL records. This causes
the Elf_Rel mapping to be emitted and allows apply_relocate() to be
defined by the arch rather than have the core emit an error message.
Note that it is possible to allow both REL and RELA records: m68k and mips are
two arches that do this.
With this, some arch asm/module.h files can be deleted entirely and replaced
with a generic-y marker in the arch Kbuild file.
Additionally, I have removed the bits from m32r and score that handle the
unsupported type of relocation record as that's now handled centrally.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
David Howells
authored and
Rusty Russell
commited |
786d35d45c | |
Cloudlinux have a product called lve that includes a kernel module. This
was previously GPLed but is now under a proprietary license, but the
module continues to declare MODULE_LICENSE("GPL") and makes use of some
EXPORT_SYMBOL_GPL symbols. Forcibly taint it in order to avoid this.
Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Alex Lyashkov <umka@cloudlinux.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org
Matthew Garrett
authored and
Rusty Russell
commited |
c99af3752b | |
The check: if (len < hdr->e_shoff + hdr->e_shnum * sizeof(Elf_Shdr)) may not work if there's an overflow in the right-hand side of the condition. Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
David Howells
authored and
Rusty Russell
commited |
ef26a5a6ea | |
This introduces a fake module param $module.dyndbg. Its based upon Thomas Renninger's $module.ddebug boot-time debugging patch from https://lkml.org/lkml/2010/9/15/397 The 'fake' module parameter is provided for all modules, whether or not they need it. It is not explicitly added to each module, but is implemented in callbacks invoked from parse_args. For builtin modules, dynamic_debug_init() now directly calls parse_args(..., &ddebug_dyndbg_boot_params_cb), to process the params undeclared in the modules, just after the ddebug tables are processed. While its slightly weird to reprocess the boot params, parse_args() is already called repeatedly by do_initcall_levels(). More importantly, the dyndbg queries (given in ddebug_query or dyndbg params) cannot be activated until after the ddebug tables are ready, and reusing parse_args is cleaner than doing an ad-hoc parse. This reparse would break options like inc_verbosity, but they probably should be params, like verbosity=3. ddebug_dyndbg_boot_params_cb() handles both bare dyndbg (aka: ddebug_query) and module-prefixed dyndbg params, and ignores all other parameters. For example, the following will enable pr_debug()s in 4 builtin modules, in the order given: dyndbg="module params +p; module aio +p" module.dyndbg=+p pci.dyndbg For loadable modules, parse_args() in load_module() calls ddebug_dyndbg_module_params_cb(). This handles bare dyndbg params as passed from modprobe, and errors on other unknown params. Note that modprobe reads /proc/cmdline, so "modprobe foo" grabs all foo.params, strips the "foo.", and passes these to the kernel. ddebug_dyndbg_module_params_cb() is again called for the unknown params; it handles dyndbg, and errors on others. The "doing" arg added previously contains the module name. For non CONFIG_DYNAMIC_DEBUG builds, the stub function accepts and ignores $module.dyndbg params, other unknowns get -ENOENT. If no param value is given (as in pci.dyndbg example above), "+p" is assumed, which enables all pr_debug callsites in the module. The dyndbg fake parameter is not shown in /sys/module/*/parameters, thus it does not use any resources. Changes to it are made via the control file. Also change pr_info in ddebug_exec_queries to vpr_info, no need to see it all the time. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> CC: Thomas Renninger <trenn@suse.de> CC: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Jason Baron <jbaron@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
Jim Cromie
authored and
 Greg Kroah-Hartman
commited |
b48420c1d3 | |
Module size was limited to 64MB, this was legacy limitation due to vmalloc() which was removed a while ago. Limiting module size to 64MB is both pointless and affects real world use cases. Cc: Tim Abbott <tim.abbott@oracle.com> Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 
Sasha Levin
authored and
Rusty Russell
commited |
f946eeb931 |