]> git.baikalelectronics.ru Git - kernel.git/commit
proc: fix /proc/*/map_files lookup some more
authorAlexey Dobriyan <adobriyan@gmail.com>
Tue, 10 Apr 2018 23:41:14 +0000 (16:41 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 11 Apr 2018 17:28:34 +0000 (10:28 -0700)
commit610a9a17ba44a9fb135dca73840d13137b9ee65b
treed65fb30bb95ccd7c089cebe5ae1d16fde7ba48be
parent70ff63750dd21c99298325f515a848adba4b02ef
proc: fix /proc/*/map_files lookup some more

I totally forgot that _parse_integer() accepts arbitrary amount of
leading zeroes leading to the following lookups:

OK
# readlink /proc/1/map_files/56427ecba000-56427eddc000
/lib/systemd/systemd

bogus
# readlink /proc/1/map_files/00000000000056427ecba000-56427eddc000
/lib/systemd/systemd
# readlink /proc/1/map_files/56427ecba000-00000000000056427eddc000
/lib/systemd/systemd

Link: http://lkml.kernel.org/r/20180303215130.GA23480@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
fs/proc/base.c
tools/testing/selftests/proc/.gitignore
tools/testing/selftests/proc/Makefile
tools/testing/selftests/proc/proc-self-map-files-001.c [new file with mode: 0644]
tools/testing/selftests/proc/proc-self-map-files-002.c [new file with mode: 0644]