EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue Unknown ioctl 1075359421 Unknown ioctl 1074275332 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/29135 is trying to acquire lock: 0000000062a4b24e (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 but task is already holding lock: 00000000f734acef (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] 00000000f734acef (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_xattr_set+0x53/0x600 fs/overlayfs/inode.c:338 __vfs_setxattr+0x10e/0x170 fs/xattr.c:149 __vfs_setxattr_noperm+0x11a/0x420 fs/xattr.c:180 __vfs_setxattr_locked+0x176/0x250 fs/xattr.c:238 vfs_setxattr+0xe5/0x270 fs/xattr.c:255 setxattr+0x23d/0x330 fs/xattr.c:520 path_setxattr+0x170/0x190 fs/xattr.c:539 __do_sys_lsetxattr fs/xattr.c:561 [inline] __se_sys_lsetxattr fs/xattr.c:557 [inline] __x64_sys_lsetxattr+0xbd/0x150 fs/xattr.c:557 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&ovl_i_mutex_dir_key[depth]){++++}: inode_lock_shared include/linux/fs.h:758 [inline] do_last fs/namei.c:3326 [inline] path_openat+0x17ec/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_open_execat+0x11d/0x5b0 fs/exec.c:853 __do_execve_file+0x1a8b/0x2360 fs/exec.c:1770 do_execveat_common fs/exec.c:1879 [inline] do_execve+0x35/0x50 fs/exec.c:1896 __do_sys_execve fs/exec.c:1977 [inline] __se_sys_execve fs/exec.c:1972 [inline] __x64_sys_execve+0x7c/0xa0 fs/exec.c:1972 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&sig->cred_guard_mutex){+.+.}: do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 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 -> #0 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 seq_read+0x6b/0x11c0 fs/seq_file.c:164 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 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: &p->lock --> &ovl_i_mutex_dir_key[depth] --> sb_writers#3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#3); lock(&ovl_i_mutex_dir_key[depth]); lock(sb_writers#3); lock(&p->lock); *** DEADLOCK *** 1 lock held by syz-executor.0/29135: #0: 00000000f734acef (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 00000000f734acef (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446 stack backtrace: CPU: 0 PID: 29135 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 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 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 seq_read+0x6b/0x11c0 fs/seq_file.c:164 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3e03b78209 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3e024cc168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f3e03c8b030 RCX: 00007f3e03b78209 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 RBP: 00007f3e03bd2161 R08: 0000000000000000 R09: 0000000000000000 R10: 4000000000010046 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff2aec9e8f R14: 00007f3e024cc300 R15: 0000000000022000 audit: type=1804 audit(1658722343.597:305): pid=29120 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir4247304394/syzkaller.hOcRfF/411/bus" dev="sda1" ino=15333 res=1 audit: type=1804 audit(1658722343.677:306): pid=29135 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2872936203/syzkaller.yUSChn/392/bus" dev="sda1" ino=15336 res=1 Bluetooth: hci2: command 0x0406 tx timeout EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue Unknown ioctl 1075359421 Unknown ioctl 1074275332 EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue Unknown ioctl 1076646955 Unknown ioctl 1076646955 BTRFS info (device loop3): disk space caching is enabled BTRFS info (device loop3): has skinny extents BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 7 scanned by syz-executor.4 (29254) BTRFS error (device loop3): bad tree block start, want 5292032 have 0 kauditd_printk_skb: 2 callbacks suppressed audit: type=1804 audit(1658722346.117:309): pid=29325 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2872936203/syzkaller.yUSChn/394/bus" dev="sda1" ino=14676 res=1 audit: type=1804 audit(1658722346.127:310): pid=29325 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2872936203/syzkaller.yUSChn/394/bus" dev="sda1" ino=14676 res=1 Unknown ioctl 1076646955 BTRFS info (device loop3): disk space caching is enabled BTRFS info (device loop3): has skinny extents BTRFS error (device loop3): bad tree block start, want 5292032 have 0 EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue validate_nla: 60 callbacks suppressed netlink: 'syz-executor.2': attribute type 1 has an invalid length. netlink: 'syz-executor.2': attribute type 2 has an invalid length. netlink: 'syz-executor.2': attribute type 1 has an invalid length. netlink: 'syz-executor.2': attribute type 2 has an invalid length. netlink: 'syz-executor.2': attribute type 1 has an invalid length. netlink: 'syz-executor.2': attribute type 2 has an invalid length. EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue netlink: 'syz-executor.2': attribute type 1 has an invalid length. netlink: 'syz-executor.2': attribute type 2 has an invalid length. netlink: 'syz-executor.2': attribute type 1 has an invalid length. netlink: 'syz-executor.2': attribute type 2 has an invalid length. Unknown ioctl 20481 EXT4-fs (loop4): mounted filesystem without journal. Opts: ,errors=continue Unknown ioctl 20481 Unknown ioctl 20481 Unknown ioctl 20481 hfsplus: invalid uid specified Unknown ioctl 20481 audit: type=1800 audit(1658722348.947:311): pid=29739 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.4" name="SYSV00000000" dev="hugetlbfs" ino=425994 res=0 hfsplus: unable to parse mount options audit: type=1800 audit(1658722349.107:312): pid=29774 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.4" name="SYSV00000000" dev="hugetlbfs" ino=458763 res=0 hfsplus: invalid uid specified hfsplus: unable to parse mount options audit: type=1800 audit(1658722349.287:313): pid=29812 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.4" name="SYSV00000000" dev="hugetlbfs" ino=491532 res=0 hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options audit: type=1804 audit(1658722350.097:314): pid=29998 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir229677573/syzkaller.DJBB1v/445/file0" dev="sda1" ino=15361 res=1 hfsplus: invalid uid specified hfsplus: unable to parse mount options audit: type=1804 audit(1658722350.207:315): pid=30007 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2872936203/syzkaller.yUSChn/407/bus" dev="sda1" ino=15341 res=1 hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options audit: type=1804 audit(1658722351.057:316): pid=30172 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2872936203/syzkaller.yUSChn/408/bus" dev="sda1" ino=15366 res=1 hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options audit: type=1804 audit(1658722351.417:317): pid=30252 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2872936203/syzkaller.yUSChn/409/bus" dev="sda1" ino=15361 res=1 hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options hfsplus: invalid uid specified hfsplus: unable to parse mount options