memory leak in dev_exception

Title	Replies (including bot)	Last reply
[syzbot] memory leak in dev_exception_add	0 (1)	2021/07/13 18:07

Title

Replies (including bot)

Last reply

[syzbot] memory leak in dev_exception_add

0 (1)

2021/07/13 18:07


Created	Duration	User	Patch	Repo	Result
2022/11/02 04:30	14m	retest repro		upstream	OK log
2021/08/28 15:23	14m	phind.uet@gmail.com		linux-next	report log

BUG: memory leak unreferenced object 0xffff88810d3a4300 (size 64): comm "systemd", pid 1, jiffies 4294938536 (age 1351.150s) hex dump (first 32 bytes): 01 00 00 00 03 00 00 00 02 00 07 00 00 00 00 00 ................ 10 04 2b 0d 81 88 ff ff 22 01 00 00 00 00 ad de ..+....."....... backtrace: [<ffffffff81479633>] kmemdup+0x23/0x50 mm/util.c:128 [<ffffffff8217485f>] kmemdup include/linux/fortify-string.h:270 [inline] [<ffffffff8217485f>] dev_exception_add+0x2f/0x160 security/device_cgroup.c:94 [<ffffffff82175812>] devcgroup_update_access security/device_cgroup.c:734 [inline] [<ffffffff82175812>] devcgroup_access_write+0x8c2/0x9e0 security/device_cgroup.c:764 [<ffffffff813198bd>] cgroup_file_write+0x10d/0x260 kernel/cgroup/cgroup.c:3814 [<ffffffff81690535>] kernfs_fop_write_iter+0x1b5/0x270 fs/kernfs/file.c:296 [<ffffffff81560eb7>] call_write_iter include/linux/fs.h:2114 [inline] [<ffffffff81560eb7>] new_sync_write+0x1d7/0x2b0 fs/read_write.c:518 [<ffffffff81564531>] vfs_write+0x351/0x400 fs/read_write.c:605 [<ffffffff8156481d>] ksys_write+0x9d/0x160 fs/read_write.c:658 [<ffffffff8439b235>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8439b235>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff88810d2b0400 (size 64): comm "systemd", pid 1, jiffies 4294938537 (age 1351.140s) hex dump (first 32 bytes): 01 00 00 00 05 00 00 00 02 00 07 00 00 00 00 00 ................ 90 ac 3b 0d 81 88 ff ff 22 01 00 00 00 00 ad de ..;....."....... backtrace: [<ffffffff81479633>] kmemdup+0x23/0x50 mm/util.c:128 [<ffffffff8217485f>] kmemdup include/linux/fortify-string.h:270 [inline] [<ffffffff8217485f>] dev_exception_add+0x2f/0x160 security/device_cgroup.c:94 [<ffffffff82175812>] devcgroup_update_access security/device_cgroup.c:734 [inline] [<ffffffff82175812>] devcgroup_access_write+0x8c2/0x9e0 security/device_cgroup.c:764 [<ffffffff813198bd>] cgroup_file_write+0x10d/0x260 kernel/cgroup/cgroup.c:3814 [<ffffffff81690535>] kernfs_fop_write_iter+0x1b5/0x270 fs/kernfs/file.c:296 [<ffffffff81560eb7>] call_write_iter include/linux/fs.h:2114 [inline] [<ffffffff81560eb7>] new_sync_write+0x1d7/0x2b0 fs/read_write.c:518 [<ffffffff81564531>] vfs_write+0x351/0x400 fs/read_write.c:605 [<ffffffff8156481d>] ksys_write+0x9d/0x160 fs/read_write.c:658 [<ffffffff8439b235>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8439b235>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff88810d3bac80 (size 64): comm "systemd", pid 1, jiffies 4294938537 (age 1351.140s) hex dump (first 32 bytes): 01 00 00 00 07 00 00 00 02 00 07 00 00 00 00 00 ................ 50 84 31 0d 81 88 ff ff 22 01 00 00 00 00 ad de P.1....."....... backtrace: [<ffffffff81479633>] kmemdup+0x23/0x50 mm/util.c:128 [<ffffffff8217485f>] kmemdup include/linux/fortify-string.h:270 [inline] [<ffffffff8217485f>] dev_exception_add+0x2f/0x160 security/device_cgroup.c:94 [<ffffffff82175812>] devcgroup_update_access security/device_cgroup.c:734 [inline] [<ffffffff82175812>] devcgroup_access_write+0x8c2/0x9e0 security/device_cgroup.c:764 [<ffffffff813198bd>] cgroup_file_write+0x10d/0x260 kernel/cgroup/cgroup.c:3814 [<ffffffff81690535>] kernfs_fop_write_iter+0x1b5/0x270 fs/kernfs/file.c:296 [<ffffffff81560eb7>] call_write_iter include/linux/fs.h:2114 [inline] [<ffffffff81560eb7>] new_sync_write+0x1d7/0x2b0 fs/read_write.c:518 [<ffffffff81564531>] vfs_write+0x351/0x400 fs/read_write.c:605 [<ffffffff8156481d>] ksys_write+0x9d/0x160 fs/read_write.c:658 [<ffffffff8439b235>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8439b235>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae BUG: memory leak unreferenced object 0xffff88810d318440 (size 64): comm "systemd", pid 1, jiffies 4294938537 (age 1351.140s) hex dump (first 32 bytes): 01 00 00 00 08 00 00 00 02 00 07 00 00 00 00 00 ................ d0 aa 3b 0d 81 88 ff ff 22 01 00 00 00 00 ad de ..;....."....... backtrace: [<ffffffff81479633>] kmemdup+0x23/0x50 mm/util.c:128 [<ffffffff8217485f>] kmemdup include/linux/fortify-string.h:270 [inline] [<ffffffff8217485f>] dev_exception_add+0x2f/0x160 security/device_cgroup.c:94 [<ffffffff82175812>] devcgroup_update_access security/device_cgroup.c:734 [inline] [<ffffffff82175812>] devcgroup_access_write+0x8c2/0x9e0 security/device_cgroup.c:764 [<ffffffff813198bd>] cgroup_file_write+0x10d/0x260 kernel/cgroup/cgroup.c:3814 [<ffffffff81690535>] kernfs_fop_write_iter+0x1b5/0x270 fs/kernfs/file.c:296 [<ffffffff81560eb7>] call_write_iter include/linux/fs.h:2114 [inline] [<ffffffff81560eb7>] new_sync_write+0x1d7/0x2b0 fs/read_write.c:518 [<ffffffff81564531>] vfs_write+0x351/0x400 fs/read_write.c:605 [<ffffffff8156481d>] ksys_write+0x9d/0x160 fs/read_write.c:658 [<ffffffff8439b235>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff8439b235>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 [<ffffffff84400068>] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 1363.912106][ C1]