block nbd1: shutting down sockets
block nbd0: shutting down sockets
block nbd4: shutting down sockets
block nbd2: shutting down sockets
======================================================
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor228/8129 is trying to acquire lock:
00000000da7025a4 ((wq_completion)"knbd%d-recv"nbd->index){+.+.}, at: flush_workqueue+0xe8/0x13e0 kernel/workqueue.c:2658
but task is already holding lock:
000000003a5537cb (&nbd->config_lock){+.+.}, at: refcount_dec_and_mutex_lock lib/refcount.c:311 [inline]
000000003a5537cb (&nbd->config_lock){+.+.}, at: refcount_dec_and_mutex_lock+0x4a/0x80 lib/refcount.c:306
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #10 (&nbd->config_lock){+.+.}:
nbd_open+0x2e2/0x6f0 drivers/block/nbd.c:1428
__blkdev_get+0x372/0x1480 fs/block_dev.c:1494
blkdev_get+0xb0/0x940 fs/block_dev.c:1627
blkdev_open+0x202/0x290 fs/block_dev.c:1788
do_dentry_open+0x4aa/0x1160 fs/open.c:796
do_last fs/namei.c:3421 [inline]
path_openat+0x793/0x2df0 fs/namei.c:3537
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
do_sys_open+0x3b3/0x520 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #9 (nbd_index_mutex){+.+.}:
nbd_open+0x73/0x6f0 drivers/block/nbd.c:1415
__blkdev_get+0x372/0x1480 fs/block_dev.c:1494
blkdev_get+0xb0/0x940 fs/block_dev.c:1627
blkdev_open+0x202/0x290 fs/block_dev.c:1788
do_dentry_open+0x4aa/0x1160 fs/open.c:796
do_last fs/namei.c:3421 [inline]
path_openat+0x793/0x2df0 fs/namei.c:3537
do_filp_open+0x18c/0x3f0 fs/namei.c:3567
do_sys_open+0x3b3/0x520 fs/open.c:1085
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #8 (&bdev->bd_mutex){+.+.}:
blkdev_put+0x30/0x520 fs/block_dev.c:1839
btrfs_close_bdev fs/btrfs/volumes.c:1033 [inline]
btrfs_close_one_device fs/btrfs/volumes.c:1057 [inline]
close_fs_devices.part.0+0x24d/0x8e0 fs/btrfs/volumes.c:1085
close_fs_devices fs/btrfs/volumes.c:1117 [inline]
btrfs_close_devices+0x95/0x1f0 fs/btrfs/volumes.c:1103
close_ctree+0x3c8/0x850 fs/btrfs/disk-io.c:4047
generic_shutdown_super+0x144/0x370 fs/super.c:456
kill_anon_super+0x36/0x60 fs/super.c:1032
btrfs_kill_super+0x49/0x550 fs/btrfs/super.c:2221
deactivate_locked_super+0x94/0x160 fs/super.c:329
deactivate_super+0x174/0x1a0 fs/super.c:360
cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098
task_work_run+0x148/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #7 (&fs_devs->device_list_mutex){+.+.}:
btrfs_run_dev_stats+0xbb/0xa80 fs/btrfs/volumes.c:7111
commit_cowonly_roots+0x1ce/0xc30 fs/btrfs/transaction.c:1172
btrfs_commit_transaction+0x94a/0x2480 fs/btrfs/transaction.c:2218
btrfs_clear_free_space_tree+0x69d/0xa50 fs/btrfs/free-space-tree.c:1255
open_ctree.cold+0x30/0xc3d fs/btrfs/disk-io.c:3203
btrfs_fill_super fs/btrfs/super.c:1209 [inline]
btrfs_mount_root+0x12e5/0x1830 fs/btrfs/super.c:1613
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount+0x3c/0x60 fs/namespace.c:951
btrfs_mount+0x23a/0xaa0 fs/btrfs/super.c:1681
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2492 [inline]
do_mount+0x115c/0x2f50 fs/namespace.c:2822
ksys_mount+0xcf/0x130 fs/namespace.c:3038
__do_sys_mount fs/namespace.c:3052 [inline]
__se_sys_mount fs/namespace.c:3049 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3049
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #6 (&fs_info->tree_log_mutex){+.+.}:
btrfs_commit_transaction+0x8c2/0x2480 fs/btrfs/transaction.c:2176
btrfs_clear_free_space_tree+0x69d/0xa50 fs/btrfs/free-space-tree.c:1255
open_ctree.cold+0x30/0xc3d fs/btrfs/disk-io.c:3203
btrfs_fill_super fs/btrfs/super.c:1209 [inline]
btrfs_mount_root+0x12e5/0x1830 fs/btrfs/super.c:1613
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount+0x3c/0x60 fs/namespace.c:951
btrfs_mount+0x23a/0xaa0 fs/btrfs/super.c:1681
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2492 [inline]
do_mount+0x115c/0x2f50 fs/namespace.c:2822
ksys_mount+0xcf/0x130 fs/namespace.c:3038
__do_sys_mount fs/namespace.c:3052 [inline]
__se_sys_mount fs/namespace.c:3049 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3049
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #5 (&fs_info->reloc_mutex){+.+.}:
btrfs_commit_transaction+0x80b/0x2480 fs/btrfs/transaction.c:2120
btrfs_clear_free_space_tree+0x69d/0xa50 fs/btrfs/free-space-tree.c:1255
open_ctree.cold+0x30/0xc3d fs/btrfs/disk-io.c:3203
btrfs_fill_super fs/btrfs/super.c:1209 [inline]
btrfs_mount_root+0x12e5/0x1830 fs/btrfs/super.c:1613
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount+0x3c/0x60 fs/namespace.c:951
btrfs_mount+0x23a/0xaa0 fs/btrfs/super.c:1681
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2492 [inline]
do_mount+0x115c/0x2f50 fs/namespace.c:2822
ksys_mount+0xcf/0x130 fs/namespace.c:3038
__do_sys_mount fs/namespace.c:3052 [inline]
__se_sys_mount fs/namespace.c:3049 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3049
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #4 (sb_internal#2){.+.+}:
sb_start_intwrite include/linux/fs.h:1626 [inline]
start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528
btrfs_dirty_inode+0xe3/0x210 fs/btrfs/inode.c:6165
btrfs_update_time+0x33b/0x3d0 fs/btrfs/inode.c:6207
update_time fs/inode.c:1675 [inline]
touch_atime+0x23c/0x2a0 fs/inode.c:1746
file_accessed include/linux/fs.h:2123 [inline]
btrfs_file_mmap+0x11b/0x160 fs/btrfs/file.c:2274
call_mmap include/linux/fs.h:1826 [inline]
mmap_region+0xc94/0x16b0 mm/mmap.c:1757
do_mmap+0x8e8/0x1080 mm/mmap.c:1530
do_mmap_pgoff include/linux/mm.h:2329 [inline]
vm_mmap_pgoff+0x197/0x200 mm/util.c:357
ksys_mmap_pgoff+0x298/0x5a0 mm/mmap.c:1580
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #3 (&mm->mmap_sem){++++}:
_copy_to_iter+0x3d0/0xea0 lib/iov_iter.c:564
copy_to_iter include/linux/uio.h:106 [inline]
skb_copy_datagram_iter+0x469/0x9e0 net/core/datagram.c:431
skb_copy_datagram_msg include/linux/skbuff.h:3347 [inline]
unix_stream_read_actor+0x78/0xc0 net/unix/af_unix.c:2489
unix_stream_read_generic+0x8b9/0x1a40 net/unix/af_unix.c:2410
unix_stream_recvmsg+0xb1/0xf0 net/unix/af_unix.c:2505
sock_recvmsg_nosec net/socket.c:859 [inline]
sock_recvmsg net/socket.c:866 [inline]
sock_recvmsg net/socket.c:862 [inline]
sock_read_iter+0x339/0x470 net/socket.c:944
call_read_iter include/linux/fs.h:1815 [inline]
new_sync_read fs/read_write.c:406 [inline]
__vfs_read+0x518/0x750 fs/read_write.c:418
vfs_read+0x194/0x3c0 fs/read_write.c:452
ksys_read+0x12b/0x2a0 fs/read_write.c:579
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #2 (&u->iolock){+.+.}:
unix_stream_read_generic+0x2de/0x1a40 net/unix/af_unix.c:2322
unix_stream_recvmsg+0xb1/0xf0 net/unix/af_unix.c:2505
sock_recvmsg_nosec net/socket.c:859 [inline]
sock_recvmsg net/socket.c:866 [inline]
sock_recvmsg+0xca/0x110 net/socket.c:862
sock_xmit+0x37d/0x5c0 drivers/block/nbd.c:439
nbd_read_stat drivers/block/nbd.c:633 [inline]
recv_work+0x1e9/0x1100 drivers/block/nbd.c:732
process_one_work+0x864/0x1570 kernel/workqueue.c:2153
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
-> #1 ((work_completion)(&args->work)){+.+.}:
worker_thread+0x64c/0x1130 kernel/workqueue.c:2296
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
-> #0 ((wq_completion)"knbd%d-recv"nbd->index){+.+.}:
flush_workqueue+0x117/0x13e0 kernel/workqueue.c:2661
drain_workqueue+0x1a5/0x460 kernel/workqueue.c:2826
destroy_workqueue+0x75/0x790 kernel/workqueue.c:4183
nbd_config_put+0x3c5/0x870 drivers/block/nbd.c:1175
nbd_release+0xf4/0x170 drivers/block/nbd.c:1461
__blkdev_put+0x636/0x870 fs/block_dev.c:1819
blkdev_close+0x86/0xb0 fs/block_dev.c:1888
__fput+0x2ce/0x890 fs/file_table.c:278
task_work_run+0x148/0x1c0 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xbf3/0x2be0 kernel/exit.c:870
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
other info that might help us debug this:
Chain exists of:
(wq_completion)"knbd%d-recv"nbd->index --> nbd_index_mutex --> &nbd->config_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&nbd->config_lock);
lock(nbd_index_mutex);
lock(&nbd->config_lock);
lock((wq_completion)"knbd%d-recv"nbd->index);
*** DEADLOCK ***
2 locks held by syz-executor228/8129:
#0: 000000001d3ce4bb (&bdev->bd_mutex){+.+.}, at: __blkdev_put+0xfc/0x870 fs/block_dev.c:1806
#1: 000000003a5537cb (&nbd->config_lock){+.+.}, at: refcount_dec_and_mutex_lock lib/refcount.c:311 [inline]
#1: 000000003a5537cb (&nbd->config_lock){+.+.}, at: refcount_dec_and_mutex_lock+0x4a/0x80 lib/refcount.c:306
stack backtrace:
CPU: 1 PID: 8129 Comm: syz-executor228 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222
check_prev_add kernel/locking/lockdep.c:1866 [inline]
check_prevs_add kernel/locking/lockdep.c:1979 [inline]
validate_chain kernel/locking/lockdep.c:2420 [inline]
__lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416
lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
flush_workqueue+0x117/0x13e0 kernel/workqueue.c:2661
drain_workqueue+0x1a5/0x460 kernel/workqueue.c:2826
destroy_workqueue+0x75/0x790 kernel/workqueue.c:4183
nbd_config_put+0x3c5/0x870 drivers/block/nbd.c:1175
nbd_release+0xf4/0x170 drivers/block/nbd.c:1461
__blkdev_put+0x636/0x870 fs/block_dev.c:1819
blkdev_close+0x86/0xb0 fs/block_dev.c:1888
__fput+0x2ce/0x890 fs/file_table.c:278
task_work_run+0x148/0x1c0 kernel/task_work.c:113
exit_task_work include/linux/task_work.h:22 [inline]
do_exit+0xbf3/0x2be0 kernel/exit.c:870
do_group_exit+0x125/0x310 kernel/exit.c:967
get_signal+0x3f2/0x1f70 kernel/signal.c:2589
do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799
exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f64923ffc99
Code: Bad RIP value.
RSP: 002b:00007fffe684ab58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007f64923ffc99
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007fffe684ab80 R09: 00007fffe684ab80
R10: 00007fffe684ab80 R11: 0000000000000246 R12: 00007f64923beab0
R13: 00007fffe684abb0 R14: 00007fffe684ab90 R15: 0000000000000000
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by syz-executor228 (8670)
btrfs_printk: 26 callbacks suppressed
BTRFS info (device loop1): enabling inode map caching
BTRFS warning (device <unknown>): duplicate device /dev/loop3 devid 1 generation 8 scanned by systemd-udevd (8680)
BTRFS info (device loop1): force clearing of disk cache
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor228 (8686)
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop0 devid 1 generation 8 scanned by syz-executor228 (8682)
BTRFS warning (device <unknown>): duplicate device /dev/loop0 devid 1 generation 8 scanned by systemd-udevd (8677)
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (8692)
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by systemd-udevd (8708)
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor228 (8685)
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (8699)
BTRFS warning (device <unknown>): duplicate device /dev/loop5 devid 1 generation 8 scanned by syz-executor228 (8684)
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
BTRFS info (device loop1): force clearing of disk cache
BTRFS info (device loop1): disabling free space tree
BTRFS info (device loop1): setting 8 feature flag
BTRFS info (device loop1): use lzo compression, level 0
BTRFS info (device loop1): has skinny extents
BTRFS info (device loop1): clearing free space tree
BTRFS info (device loop1): clearing 1 ro feature flag
BTRFS info (device loop1): clearing 2 ro feature flag
BTRFS info (device loop1): enabling inode map caching
block nbd3: shutting down sockets
==================================================================
BUG: KASAN: use-after-free in btrfs_search_slot+0x1cca/0x1ee0 fs/btrfs/ctree.c:2793
Read of size 8 at addr ffff8880abe0c770 by task btrfs-ino-cache/9337
CPU: 0 PID: 9337 Comm: btrfs-ino-cache Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load8_noabort+0x88/0x90 mm/kasan/report.c:433
btrfs_search_slot+0x1cca/0x1ee0 fs/btrfs/ctree.c:2793
caching_kthread+0x275/0x970 fs/btrfs/inode-map.c:61
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Allocated by task 9306:
kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625
kmalloc include/linux/slab.h:515 [inline]
kzalloc include/linux/slab.h:709 [inline]
btrfs_alloc_root fs/btrfs/disk-io.c:1220 [inline]
btrfs_read_tree_root+0x94/0x560 fs/btrfs/disk-io.c:1421
btrfs_read_fs_root fs/btrfs/disk-io.c:1467 [inline]
btrfs_get_fs_root+0x239/0x890 fs/btrfs/disk-io.c:1601
btrfs_read_fs_root_no_name fs/btrfs/disk-io.h:80 [inline]
open_ctree+0x469c/0x61e0 fs/btrfs/disk-io.c:3181
btrfs_fill_super fs/btrfs/super.c:1209 [inline]
btrfs_mount_root+0x12e5/0x1830 fs/btrfs/super.c:1613
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount+0x3c/0x60 fs/namespace.c:951
btrfs_mount+0x23a/0xaa0 fs/btrfs/super.c:1681
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2492 [inline]
do_mount+0x115c/0x2f50 fs/namespace.c:2822
ksys_mount+0xcf/0x130 fs/namespace.c:3038
__do_sys_mount fs/namespace.c:3052 [inline]
__se_sys_mount fs/namespace.c:3049 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3049
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 8123:
__cache_free mm/slab.c:3503 [inline]
kfree+0xcc/0x210 mm/slab.c:3822
btrfs_put_fs_root fs/btrfs/disk-io.h:111 [inline]
btrfs_free_fs_root+0x1e6/0x260 fs/btrfs/disk-io.c:3861
btrfs_free_fs_roots+0x2ef/0x4d0 fs/btrfs/disk-io.c:2092
close_ctree+0x306/0x850 fs/btrfs/disk-io.c:4017
generic_shutdown_super+0x144/0x370 fs/super.c:456
kill_anon_super+0x36/0x60 fs/super.c:1032
btrfs_kill_super+0x49/0x550 fs/btrfs/super.c:2221
deactivate_locked_super+0x94/0x160 fs/super.c:329
deactivate_super+0x174/0x1a0 fs/super.c:360
cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098
task_work_run+0x148/0x1c0 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:193 [inline]
exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167
prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The buggy address belongs to the object at ffff8880abe0c580
which belongs to the cache kmalloc-4096 of size 4096
The buggy address is located 496 bytes inside of
4096-byte region [ffff8880abe0c580, ffff8880abe0d580)
The buggy address belongs to the page:
page:ffffea0002af8300 count:1 mapcount:0 mapping:ffff88813bff0dc0 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea000251f888 ffffea000254dd08 ffff88813bff0dc0
raw: 0000000000000000 ffff8880abe0c580 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880abe0c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880abe0c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880abe0c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880abe0c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880abe0c800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================