WARNING in kmalloc_slab (5)

Status: closed as invalid on 2018/04/09 12:26
Subsystems: bfs
[Documentation on labels]
Reported-by: syzbot+e523187f968b279cd1f0@syzkaller.appspotmail.com
First crash: 3053d, last: 3051d
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in kmalloc_slab net -1 syz, C 22353 3214d 3286d 3/29 fixed on 2017/10/24 06:54
upstream WARNING in kmalloc_slab (3) net -1 syz, C 1901 3089d 3173d 4/29 fixed on 2018/02/26 20:04
upstream WARNING in kmalloc_slab (4) net -1 1 3075d 3074d 4/29 fixed on 2018/03/23 18:14
upstream WARNING in kmalloc_slab (2) block trace -1 syz, C 2478 3196d 3214d 3/29 fixed on 2017/11/11 01:37

Sample crash report:
BFS-fs: bfs_fill_super(): loop1 is unclean, continuing
WARNING: CPU: 1 PID: 10275 at mm/slab_common.c:1012 kmalloc_slab+0x5d/0x70 mm/slab_common.c:1012
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 10275 Comm: syz-executor1 Not tainted 4.16.0+ #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1a7/0x27d lib/dump_stack.c:53
 panic+0x1f8/0x42c kernel/panic.c:183
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x1f4/0x2b0 lib/bug.c:186
 fixup_bug.part.10+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:991
RIP: 0010:kmalloc_slab+0x5d/0x70 mm/slab_common.c:1012
RSP: 0018:ffff8801972af8d0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff880185ea5004 RCX: ffffffff820a91ba
RDX: 1ffff10039d57a84 RSI: 0000000000000000 RDI: 0000000000800000
RBP: ffff8801972af8d0 R08: ffffed003b624fb1 R09: ffffed003b624fb1
R10: 0000000000000001 R11: ffffed003b624fb0 R12: 00000000007fffff
R13: ffff880185ea5000 R14: 00000000014080c0 R15: ffff8801c5dba300
 __do_kmalloc mm/slab.c:3701 [inline]
 __kmalloc+0x25/0x760 mm/slab.c:3715
 kmalloc include/linux/slab.h:517 [inline]
 kzalloc include/linux/slab.h:701 [inline]
 bfs_fill_super+0x3d3/0xea0 fs/bfs/inode.c:362
 mount_bdev+0x2b7/0x370 fs/super.c:1119
 bfs_mount+0x34/0x40 fs/bfs/inode.c:465
 mount_fs+0x66/0x2d0 fs/super.c:1222
 vfs_kern_mount.part.26+0xc6/0x4a0 fs/namespace.c:1037
 vfs_kern_mount fs/namespace.c:2514 [inline]
 do_new_mount fs/namespace.c:2517 [inline]
 do_mount+0xea4/0x2b90 fs/namespace.c:2847
 ksys_mount+0xab/0x120 fs/namespace.c:3063
 SYSC_mount fs/namespace.c:3077 [inline]
 SyS_mount+0x39/0x50 fs/namespace.c:3074
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457d0a
RSP: 002b:00007f5f23b62bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457d0a
RDX: 0000000020000000 RSI: 0000000020000040 RDI: 00007f5f23b62c00
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000013
R13: 0000000000000662 R14: 00000000006fc9d0 R15: 0000000000000000
CPU: 0 PID: 10267 Comm: syz-executor5 Not tainted 4.16.0+ #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1a7/0x27d lib/dump_stack.c:53
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x914/0xae0 lib/fault-inject.c:149
 should_failslab+0xec/0x120 mm/failslab.c:32
 slab_pre_alloc_hook mm/slab.h:422 [inline]
 slab_alloc mm/slab.c:3366 [inline]
 kmem_cache_alloc_trace+0x4b/0x740 mm/slab.c:3606
 kmalloc include/linux/slab.h:512 [inline]
 __kthread_create_on_node+0x127/0x480 kernel/kthread.c:283
 kthread_create_on_node+0xc9/0x100 kernel/kthread.c:365
 loop_prepare_queue drivers/block/loop.c:847 [inline]
 loop_set_fd drivers/block/loop.c:908 [inline]
 lo_ioctl+0x889/0x1b70 drivers/block/loop.c:1358
 __blkdev_driver_ioctl block/ioctl.c:303 [inline]
 blkdev_ioctl+0x1759/0x1e00 block/ioctl.c:601
 block_ioctl+0xde/0x120 fs/block_dev.c:1875
 vfs_ioctl fs/ioctl.c:46 [inline]
 do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
 ksys_ioctl+0x94/0xb0 fs/ioctl.c:701
 SYSC_ioctl fs/ioctl.c:708 [inline]
 SyS_ioctl+0x24/0x30 fs/ioctl.c:706
 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x455147
RSP: 002b:00007fef09fe0bb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000020000228 RCX: 0000000000455147
RDX: 0000000000000014 RSI: 0000000000004c00 RDI: 0000000000000015
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000662 R14: 00000000006fc9d0 R15: 0000000000000007
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/04/04 14:58 upstream 17dec0a94915 676bd07e .config console log report ci-upstream-kasan-gce-root
2018/04/03 08:03 upstream 86bbbebac193 676bd07e .config console log report ci-upstream-kasan-gce-root
* Struck through repros no longer work on HEAD.