audit: type=1804 audit(1674119908.231:130): pid=17841 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1708088318/syzkaller.F47WJg/174/file0/bus" dev="loop1" ino=7 res=1 audit: type=1800 audit(1674119908.231:131): pid=17841 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=7 res=0 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/17897 is trying to acquire lock: 00000000a0b5a44c (&ovl_i_mutex_key[depth]){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] 00000000a0b5a44c (&ovl_i_mutex_key[depth]){+.+.}, at: ovl_write_iter+0x148/0xb40 fs/overlayfs/file.c:270 but task is already holding lock: 00000000e45df5d6 (&pipe->mutex/1){+.+.}, at: pipe_lock_nested fs/pipe.c:77 [inline] 00000000e45df5d6 (&pipe->mutex/1){+.+.}, at: pipe_lock fs/pipe.c:85 [inline] 00000000e45df5d6 (&pipe->mutex/1){+.+.}, at: pipe_wait+0x1bd/0x1e0 fs/pipe.c:133 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&pipe->mutex/1){+.+.}: pipe_lock_nested fs/pipe.c:77 [inline] pipe_lock+0x63/0x80 fs/pipe.c:85 iter_file_splice_write+0x183/0xbb0 fs/splice.c:700 do_splice_from fs/splice.c:852 [inline] do_splice fs/splice.c:1154 [inline] __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_link+0x73/0x2b0 fs/overlayfs/dir.c:676 vfs_link+0x7e6/0xc80 fs/namei.c:4243 do_linkat+0x52a/0x810 fs/namei.c:4311 __do_sys_link fs/namei.c:4340 [inline] __se_sys_link fs/namei.c:4338 [inline] __x64_sys_link+0x5d/0x80 fs/namei.c:4338 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&ovl_i_mutex_key[depth]){+.+.}: down_write+0x34/0x90 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:748 [inline] ovl_write_iter+0x148/0xb40 fs/overlayfs/file.c:270 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 __kernel_write+0x109/0x370 fs/read_write.c:506 write_pipe_buf+0x153/0x1f0 fs/splice.c:798 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x389/0x800 fs/splice.c:627 splice_from_pipe fs/splice.c:662 [inline] default_file_splice_write+0xd8/0x180 fs/splice.c:810 do_splice_from fs/splice.c:852 [inline] do_splice fs/splice.c:1154 [inline] __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &ovl_i_mutex_key[depth] --> sb_writers#3 --> &pipe->mutex/1 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&pipe->mutex/1); lock(sb_writers#3); lock(&pipe->mutex/1); lock(&ovl_i_mutex_key[depth]); *** DEADLOCK *** 2 locks held by syz-executor.5/17897: #0: 00000000e1b322ed (sb_writers#14){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 00000000e1b322ed (sb_writers#14){.+.+}, at: do_splice fs/splice.c:1153 [inline] #0: 00000000e1b322ed (sb_writers#14){.+.+}, at: __do_sys_splice fs/splice.c:1428 [inline] #0: 00000000e1b322ed (sb_writers#14){.+.+}, at: __se_sys_splice+0x11de/0x16d0 fs/splice.c:1408 #1: 00000000e45df5d6 (&pipe->mutex/1){+.+.}, at: pipe_lock_nested fs/pipe.c:77 [inline] #1: 00000000e45df5d6 (&pipe->mutex/1){+.+.}, at: pipe_lock fs/pipe.c:85 [inline] #1: 00000000e45df5d6 (&pipe->mutex/1){+.+.}, at: pipe_wait+0x1bd/0x1e0 fs/pipe.c:133 stack backtrace: CPU: 1 PID: 17897 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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 down_write+0x34/0x90 kernel/locking/rwsem.c:70 inode_lock include/linux/fs.h:748 [inline] ovl_write_iter+0x148/0xb40 fs/overlayfs/file.c:270 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 __kernel_write+0x109/0x370 fs/read_write.c:506 write_pipe_buf+0x153/0x1f0 fs/splice.c:798 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x389/0x800 fs/splice.c:627 splice_from_pipe fs/splice.c:662 [inline] default_file_splice_write+0xd8/0x180 fs/splice.c:810 do_splice_from fs/splice.c:852 [inline] do_splice fs/splice.c:1154 [inline] __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f25931fc0c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f259176e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00007f259331bf80 RCX: 00007f25931fc0c9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f2593257ae9 R08: 000000000000fdef R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc488ade1f R14: 00007f259176e300 R15: 0000000000022000 bond1 (unregistering): Released all slaves audit: type=1804 audit(1674119909.481:132): pid=17939 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1708088318/syzkaller.F47WJg/175/file0/bus" dev="loop1" ino=7 res=1 audit: type=1800 audit(1674119909.481:133): pid=17939 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name="bus" dev="loop1" ino=7 res=0 audit: type=1804 audit(1674119912.261:134): pid=18112 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1708088318/syzkaller.F47WJg/183/bus" dev="sda1" ino=14826 res=1 audit: type=1804 audit(1674119912.361:135): pid=18119 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir1708088318/syzkaller.F47WJg/183/bus" dev="sda1" ino=14826 res=1 EXT4-fs error (device loop3): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 106 vs 41 free clusters Quota error (device loop3): write_blk: dquota write failed Quota error (device loop3): qtree_write_dquot: Error -28 occurred while creating quota Quota error (device loop3): write_blk: dquota write failed Quota error (device loop3): qtree_write_dquot: Error -28 occurred while creating quota EXT4-fs error (device loop3): ext4_xattr_delete_inode:2921: inode #15: comm syz-executor.3: corrupted xattr block 19 EXT4-fs warning (device loop3): ext4_evict_inode:318: xattr delete (err -117) EXT4-fs (loop3): 1 orphan inode deleted EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs error (device loop3): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 106 vs 41 free clusters EXT4-fs error (device loop3): ext4_xattr_delete_inode:2921: inode #15: comm syz-executor.3: corrupted xattr block 19 EXT4-fs warning (device loop3): ext4_evict_inode:318: xattr delete (err -117) EXT4-fs (loop3): 1 orphan inode deleted EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue kauditd_printk_skb: 5 callbacks suppressed audit: type=1804 audit(1674119913.351:137): pid=18162 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir4196596258/syzkaller.6i8SDU/234/bus" dev="sda1" ino=14817 res=1 audit: type=1804 audit(1674119913.441:138): pid=18169 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir4196596258/syzkaller.6i8SDU/234/bus" dev="sda1" ino=14817 res=1 EXT4-fs error (device loop3): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 106 vs 41 free clusters audit: type=1804 audit(1674119913.551:139): pid=18175 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir106212268/syzkaller.gbxd6Z/230/bus" dev="sda1" ino=14835 res=1 Quota error (device loop3): write_blk: dquota write failed Quota error (device loop3): qtree_write_dquot: Error -28 occurred while creating quota Quota error (device loop3): write_blk: dquota write failed audit: type=1804 audit(1674119913.691:140): pid=18176 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir106212268/syzkaller.gbxd6Z/230/bus" dev="sda1" ino=14835 res=1 Quota error (device loop3): qtree_write_dquot: Error -28 occurred while creating quota EXT4-fs error (device loop3): ext4_xattr_delete_inode:2921: inode #15: comm syz-executor.3: corrupted xattr block 19 EXT4-fs warning (device loop3): ext4_evict_inode:318: xattr delete (err -117) EXT4-fs (loop3): 1 orphan inode deleted EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1674119914.111:141): pid=18178 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir4196596258/syzkaller.6i8SDU/234/bus" dev="sda1" ino=14817 res=1 EXT4-fs error (device loop3): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 106 vs 41 free clusters overlayfs: failed to resolve './file1': -2 Quota error (device loop3): write_blk: dquota write failed EXT4-fs error (device loop3): ext4_xattr_delete_inode:2921: inode #15: comm syz-executor.3: corrupted xattr block 19 EXT4-fs warning (device loop3): ext4_evict_inode:318: xattr delete (err -117) EXT4-fs (loop3): 1 orphan inode deleted EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue overlayfs: './file0' not a directory ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22