syzbot


WARNING in smk_write_relabel_self

Status: closed as dup on 2021/01/20 02:55
Reported-by: syzbot+670d1a1e6b6face0440a@syzkaller.appspotmail.com
First crash: 581d, last: 548d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config
Duplicate of (1):
Title Repro Cause bisect Fix bisect Count Last Reported
WARNING in memdup_user_nul C inconclusive 2 582d 581d

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8457 at mm/page_alloc.c:4976 __alloc_pages_nodemask+0x4e5/0x5a0 mm/page_alloc.c:5020
Modules linked in:
CPU: 0 PID: 8457 Comm: syz-executor864 Not tainted 5.11.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__alloc_pages_nodemask+0x4e5/0x5a0 mm/page_alloc.c:5020
Code: aa 09 00 e9 dd fd ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c eb fd ff ff 4c 89 ef e8 54 aa 09 00 8b 74 24 18 e9 da fd ff ff <0f> 0b e9 f3 fd ff ff a9 00 00 08 00 75 16 8b 4c 24 1c 89 cb 81 e3
RSP: 0018:ffffc900012ef9a0 EFLAGS: 00010246
RAX: ffffc900012efa20 RBX: ffffc900012efa20 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc900012efa48
RBP: ffffc900012efae0 R08: dffffc0000000000 R09: ffffc900012efa20
R10: fffff5200025df49 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000012 R14: 1ffff9200025df40 R15: 0000000000040cc0
FS:  00000000023a2880(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e9dc94000 CR3: 0000000014b8a000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 alloc_pages include/linux/gfp.h:547 [inline]
 kmalloc_order+0x40/0x130 mm/slab_common.c:837
 kmalloc_order_trace+0x15/0x70 mm/slab_common.c:853
 kmalloc_large include/linux/slab.h:481 [inline]
 __kmalloc_track_caller+0x246/0x330 mm/slub.c:4457
 memdup_user_nul+0x26/0xf0 mm/util.c:260
 smk_write_relabel_self+0x17a/0x510 security/smack/smackfs.c:2748
 vfs_write+0x289/0xc90 fs/read_write.c:603
 ksys_write+0x171/0x2a0 fs/read_write.c:658
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x440389
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd61b9f558 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440389
RDX: 0000000020000398 RSI: 0000000020000340 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b90
R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000

Crashes (20):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2021/01/15 11:43 upstream 5ee88057889b 65a7a854 .config log report syz C
ci-upstream-kasan-gce-smack-root 2021/02/16 15:46 upstream f40ddce88593 98682e5e .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/02/16 03:38 upstream f40ddce88593 98682e5e .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/02/08 06:19 upstream b75dba7f472c 2ce644fc .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/02/07 12:16 upstream 825b5991a46e 2ce644fc .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/02/06 11:26 upstream 1e0d27fce010 23a562df .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/02/03 04:34 upstream 3aaf0a27ffc2 624dad51 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/02/02 02:31 upstream 1048ba83fb1c e6b95f32 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/29 02:18 upstream e5ff2cb9cf67 7df34f59 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/27 14:14 upstream 2ab38c17aac1 a0ebf917 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/25 02:17 upstream e68061375f79 52e37319 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/24 06:52 upstream e1ae4b0be158 52e37319 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/23 07:06 upstream 83d09ad4b950 4080af96 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/23 03:52 upstream 83d09ad4b950 4080af96 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/22 10:46 upstream 9f29bd8b2e71 d4f4eca5 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/20 05:19 upstream 1e2a199f6ccd 63631df1 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/19 16:00 upstream 1e2a199f6ccd 63631df1 .config log report info WARNING in smk_write_relabel_self
ci-upstream-kasan-gce-smack-root 2021/01/17 07:59 upstream 0da0a8a0a0e1 65a7a854 .config log report info
ci-upstream-kasan-gce-smack-root 2021/01/15 11:30 upstream 5ee88057889b 65a7a854 .config log report info
ci-upstream-kasan-gce-smack-root 2021/01/14 18:30 upstream 65f0d2414b70 65a7a854 .config log report info