Ivan Delalande
6bb4132116
proc/sysctl: don't return ENOMEM on lookup when a table is unregistering ...
commit ea5751ccd665a2fd1b24f9af81f6167f0718c5f6 upstream.
proc_sys_lookup can fail with ENOMEM instead of ENOENT when the
corresponding sysctl table is being unregistered. In our case we see
this upon opening /proc/sys/net/*/conf files while network interfaces
are being deleted, which confuses our configuration daemon.
The problem was successfully reproduced and this fix tested on v4.9.122
and v4.20-rc6.
v2: return ERR_PTRs in all cases when proc_sys_make_inode fails instead
of mixing them with NULL. Thanks Al Viro for the feedback.
Fixes: ace0c791e6stable@vger.kernel.org
Signed-off-by: Ivan Delalande <colona@arista.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-12-29 13:37:59 +01:00
proc: use "unsigned int" for sigqueue length
2018-06-07 17:34:38 -07:00
proc: restrict kernel stack dumps to root
2018-10-05 16:32:05 -07:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
proc: introduce proc_create_seq{,_data}
2018-05-16 07:23:35 +02:00
x86 / CPU: Always show current CPU frequency in /proc/cpuinfo
2017-11-15 19:46:50 +01:00
proc: introduce proc_create_seq{,_data}
2018-05-16 07:23:35 +02:00
proc: use "unsigned int" in proc_fill_cache()
2018-06-07 17:34:38 -07:00
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
proc: smaller readlock section in readdir("/proc")
2018-08-22 10:52:45 -07:00
proc: fixup PDE allocation bloat
2018-08-22 10:52:45 -07:00
proc: spread "const" a bit
2018-08-22 10:52:46 -07:00
proc: introduce proc_create_seq{,_data}
2018-05-16 07:23:35 +02:00
proc/kcore: add vmcoreinfo note to /proc/kcore
2018-08-22 10:52:46 -07:00
fs/proc/kcore.c: fix invalid memory access in multi-page read optimization
2018-09-20 22:01:11 +02:00
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
proc: : uninline name_to_int()
2017-11-17 16:10:00 -08:00
/proc/meminfo: add percpu populated pages count
2018-08-22 10:52:45 -07:00
procfs: switch instantiate_t to d_splice_alias()
2018-05-26 14:20:50 -04:00
proc: introduce proc_create_seq{,_data}
2018-05-16 07:23:35 +02:00
mm: mark pages in use for page tables
2018-06-07 17:34:37 -07:00
proc: Add a way to make network proc files writable
2018-05-18 11:46:15 +01:00
proc/sysctl: don't return ENOMEM on lookup when a table is unregistering
2018-12-29 13:37:59 +01:00
tty: replace ->proc_fops with ->proc_show
2018-05-16 07:24:30 +02:00
proc: Make inline name size calculation automatic
2018-06-15 00:48:57 -04:00
proc: introduce a proc_pid_ns helper
2018-05-16 07:23:35 +02:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
proc: use "unsigned int" in /proc/stat hook
2018-08-22 10:52:46 -07:00
mm: /proc/pid/smaps_rollup: fix NULL pointer deref in smaps_pte_range()
2018-11-13 11:08:46 -08:00
mm: /proc/pid/*maps remove is_pid and related wrappers
2018-08-22 10:52:44 -07:00
proc: introduce a proc_pid_ns helper
2018-05-16 07:23:35 +02:00
fs/proc/uptime.c: use ktime_get_boottime_ts64
2018-08-22 10:52:45 -07:00
proc: use do-while in name_to_int()
2017-11-17 16:10:00 -08:00
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fs/proc/vmcore.c: hide vmcoredd_mmap_dumps() for nommu builds
2018-08-23 18:48:43 -07:00
6bb4132116