loop0: detected capacity change from 0 to 32768
BTRFS: device fsid 395ef67a-297e-477c-816d-cd80a5b93e5d devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5335)
BTRFS info (device loop0): first mount of filesystem 395ef67a-297e-477c-816d-cd80a5b93e5d
BTRFS info (device loop0): using sha256 (sha256-lib) checksum algorithm
BTRFS info (device loop0): enabling ssd optimizations
BTRFS info (device loop0): turning on async discard
BTRFS info (device loop0): enabling free space tree
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 1
CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
fail_dump lib/fault-inject.c:73 [inline]
should_fail_ex+0x414/0x560 lib/fault-inject.c:174
should_failslab+0xa8/0x100 mm/failslab.c:46
slab_pre_alloc_hook mm/slub.c:4906 [inline]
slab_alloc_node mm/slub.c:5239 [inline]
kmem_cache_alloc_noprof+0x88/0x710 mm/slub.c:5270
add_qgroup_item+0xac/0x4a0 fs/btrfs/qgroup.c:717
btrfs_create_qgroup+0x1ac/0x530 fs/btrfs/qgroup.c:1673
create_pending_snapshot+0x86c/0x3230 fs/btrfs/transaction.c:1748
create_pending_snapshots+0x17c/0x1c0 fs/btrfs/transaction.c:1940
btrfs_commit_transaction+0xf78/0x3b10 fs/btrfs/transaction.c:2430
create_snapshot fs/btrfs/ioctl.c:779 [inline]
btrfs_mksubvol+0xc75/0x12c0 fs/btrfs/ioctl.c:926
btrfs_mksnapshot+0xab/0xf0 fs/btrfs/ioctl.c:968
__btrfs_ioctl_snap_create+0x520/0x730 fs/btrfs/ioctl.c:1232
btrfs_ioctl_snap_create+0x131/0x180 fs/btrfs/ioctl.c:1259
btrfs_ioctl+0x447/0xd00 fs/btrfs/ioctl.c:-1
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f186818f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f18690f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f18683e5fa0 RCX: 00007f186818f7c9
RDX: 0000200000001600 RSI: 0000000050009401 RDI: 0000000000000003
RBP: 00007f18690f6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f18683e6038 R14: 00007f18683e5fa0 R15: 00007fff9a831e88
assertion failed: prealloc == NULL :: 0, in fs/btrfs/qgroup.c:1690
------------[ cut here ]------------
kernel BUG at fs/btrfs/qgroup.c:1690!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:btrfs_create_qgroup+0x52b/0x530 fs/btrfs/qgroup.c:1690
Code: 24 08 e8 08 f4 6f 07 48 c7 c7 e0 49 d1 8b 48 c7 c6 40 4a d1 8b 31 d2 48 c7 c1 60 46 d1 8b 41 b8 9a 06 00 00 e8 e6 33 39 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
RSP: 0018:ffffc9000e63f540 EFLAGS: 00010246
RAX: 0000000000000042 RBX: 00000000fffffff4 RCX: 9b58d42dd7c48b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000100 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfae28 R12: dffffc0000000000
R13: 1ffff11006771b1c R14: ffff888033b8d8e0 R15: ffff8880118b4400
FS: 00007f18690f66c0(0000) GS:ffff88808d22f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e0b1ff000 CR3: 0000000045b62000 CR4: 0000000000352ef0
Call Trace:
create_pending_snapshot+0x86c/0x3230 fs/btrfs/transaction.c:1748
create_pending_snapshots+0x17c/0x1c0 fs/btrfs/transaction.c:1940
btrfs_commit_transaction+0xf78/0x3b10 fs/btrfs/transaction.c:2430
create_snapshot fs/btrfs/ioctl.c:779 [inline]
btrfs_mksubvol+0xc75/0x12c0 fs/btrfs/ioctl.c:926
btrfs_mksnapshot+0xab/0xf0 fs/btrfs/ioctl.c:968
__btrfs_ioctl_snap_create+0x520/0x730 fs/btrfs/ioctl.c:1232
btrfs_ioctl_snap_create+0x131/0x180 fs/btrfs/ioctl.c:1259
btrfs_ioctl+0x447/0xd00 fs/btrfs/ioctl.c:-1
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f186818f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f18690f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f18683e5fa0 RCX: 00007f186818f7c9
RDX: 0000200000001600 RSI: 0000000050009401 RDI: 0000000000000003
RBP: 00007f18690f6090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007f18683e6038 R14: 00007f18683e5fa0 R15: 00007fff9a831e88
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:btrfs_create_qgroup+0x52b/0x530 fs/btrfs/qgroup.c:1690
Code: 24 08 e8 08 f4 6f 07 48 c7 c7 e0 49 d1 8b 48 c7 c6 40 4a d1 8b 31 d2 48 c7 c1 60 46 d1 8b 41 b8 9a 06 00 00 e8 e6 33 39 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3
RSP: 0018:ffffc9000e63f540 EFLAGS: 00010246
RAX: 0000000000000042 RBX: 00000000fffffff4 RCX: 9b58d42dd7c48b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: 0000000000000100 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff1bfae28 R12: dffffc0000000000
R13: 1ffff11006771b1c R14: ffff888033b8d8e0 R15: ffff8880118b4400
FS: 00007f18690f66c0(0000) GS:ffff88808d22f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ecc703e5f8 CR3: 0000000045b62000 CR4: 0000000000352ef0