audit: type=1804 audit(1674681115.984:30): pid=12778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/148/file1/bus" dev="loop3" ino=4 res=1 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/12933 is trying to acquire lock: 000000000c81ebe6 (sb_writers#17){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] 000000000c81ebe6 (sb_writers#17){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 but task is already holding lock: 00000000dadb62ac (&sbi->lock){+.+.}, at: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&sbi->lock){+.+.}: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 reiserfs_lookup+0x171/0x490 fs/reiserfs/namei.c:363 __lookup_slow+0x246/0x4a0 fs/namei.c:1672 lookup_one_len+0x163/0x190 fs/namei.c:2544 reiserfs_lookup_privroot+0x92/0x280 fs/reiserfs/xattr.c:970 reiserfs_fill_super+0x1f12/0x2d80 fs/reiserfs/super.c:2187 mount_bdev+0x2fc/0x3b0 fs/super.c:1158 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 -> #1 (&type->i_mutex_dir_key#9){+.+.}: inode_lock include/linux/fs.h:748 [inline] do_last fs/namei.c:3324 [inline] path_openat+0x1071/0x2df0 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 -> #0 (sb_writers#17){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x6e/0x2a0 fs/super.c:1366 sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 reiserfs_ioctl+0x1a7/0x9a0 fs/reiserfs/ioctl.c:110 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 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: sb_writers#17 --> &type->i_mutex_dir_key#9 --> &sbi->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->lock); lock(&type->i_mutex_dir_key#9); lock(&sbi->lock); lock(sb_writers#17); *** DEADLOCK *** 1 lock held by syz-executor.3/12933: #0: 00000000dadb62ac (&sbi->lock){+.+.}, at: reiserfs_write_lock+0x75/0xf0 fs/reiserfs/lock.c:27 stack backtrace: CPU: 0 PID: 12933 Comm: syz-executor.3 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 audit: type=1804 audit(1674681115.984:31): pid=12778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/148/file1/bus" dev="loop3" ino=4 res=1 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x6e/0x2a0 fs/super.c:1366 sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 reiserfs_ioctl+0x1a7/0x9a0 fs/reiserfs/ioctl.c:110 audit: type=1804 audit(1674681116.064:32): pid=12933 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/148/file1/bus" dev="loop3" ino=4 res=1 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 new mount options do not match the existing superblock, will be ignored ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f8ea5d430c9 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:00007f8e9c294168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8ea5e63050 RCX: 00007f8ea5d430c9 RDX: 0000000020000100 RSI: 0000000040087602 RDI: 0000000000000004 RBP: 00007f8ea5d9eae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd215732ff R14: 00007f8e9c294300 R15: 0000000000022000 device syz_tun left promiscuous mode BTRFS error (device loop1): unsupported checksum algorithm 1 BTRFS error (device loop1): superblock checksum mismatch BTRFS error (device loop1): open_ctree failed EXT4-fs (loop4): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop4): orphan cleanup on readonly fs audit: type=1804 audit(1674681116.914:33): pid=12982 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/149/bus" dev="sda1" ino=14217 res=1 EXT4-fs warning (device loop4): ext4_update_dynamic_rev:860: updating to rev 1 because of new feature flag, running e2fsck is recommended EXT4-fs warning (device sda1): ext4_ioctl:814: Setting inode version is not supported with metadata_csum enabled. audit: type=1804 audit(1674681116.964:34): pid=12993 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/149/bus" dev="sda1" ino=14217 res=1 EXT4-fs error (device loop4): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 69 vs 41 free clusters EXT4-fs (loop4): Remounting filesystem read-only REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal audit: type=1804 audit(1674681116.974:35): pid=12988 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/149/bus" dev="sda1" ino=14217 res=1 REISERFS (device loop3): using ordered data mode EXT4-fs (loop4): 1 truncate cleaned up EXT4-fs (loop4): mounted filesystem without journal. Opts: errors=remount-ro,resuid=0x0000000000000000A reiserfs: using flush barriers new mount options do not match the existing superblock, will be ignored REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop3): checking transaction log (loop3) REISERFS (device loop3): Using r5 hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. EXT4-fs (loop4): feature flags set on rev 0 fs, running e2fsck is recommended EXT4-fs (loop4): orphan cleanup on readonly fs EXT4-fs warning (device loop4): ext4_update_dynamic_rev:860: updating to rev 1 because of new feature flag, running e2fsck is recommended EXT4-fs error (device loop4): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 69 vs 41 free clusters wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 EXT4-fs (loop4): Remounting filesystem read-only wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 EXT4-fs (loop4): 1 truncate cleaned up EXT4-fs (loop4): mounted filesystem without journal. Opts: errors=remount-ro,resuid=0x0000000000000000A wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 tmpfs: Bad value 'bind=rela' for mount option 'mpol' wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 tmpfs: Bad value 'bind=rela' for mount option 'mpol' tmpfs: Bad value 'bind=rela' for mount option 'mpol' REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 REISERFS (device loop4): using ordered data mode wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 tmpfs: Bad value 'bind=rela' for mount option 'mpol' REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal REISERFS (device loop3): using ordered data mode reiserfs: using flush barriers REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop3): checking transaction log (loop3) REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop3): Using r5 hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. kauditd_printk_skb: 6 callbacks suppressed audit: type=1804 audit(1674681119.834:42): pid=13364 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir2377385073/syzkaller.9frPiA/144/file1/bus" dev="loop4" ino=4 res=1 audit: type=1804 audit(1674681119.874:43): pid=13364 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir2377385073/syzkaller.9frPiA/144/file1/bus" dev="loop4" ino=4 res=1 audit: type=1804 audit(1674681119.874:44): pid=13367 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/161/file1/bus" dev="loop3" ino=4 res=1 audit: type=1804 audit(1674681119.874:45): pid=13367 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/161/file1/bus" dev="loop3" ino=4 res=1 audit: type=1804 audit(1674681119.974:46): pid=13396 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir2377385073/syzkaller.9frPiA/144/file1/bus" dev="loop4" ino=4 res=1 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 audit: type=1804 audit(1674681120.024:47): pid=13398 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir1342981396/syzkaller.Fj5HpM/161/file1/bus" dev="loop3" ino=4 res=1 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 audit: type=1804 audit(1674681120.064:48): pid=13414 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir2377385073/syzkaller.9frPiA/144/file1/bus" dev="loop4" ino=4 res=1 audit: type=1804 audit(1674681120.194:49): pid=13435 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir2377385073/syzkaller.9frPiA/145/bus" dev="sda1" ino=14277 res=1 REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop4): using ordered data mode reiserfs: using flush barriers REISERFS (device loop4): journal params: device loop4, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): checking transaction log (loop4) wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 audit: type=1804 audit(1674681120.244:50): pid=13435 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir2377385073/syzkaller.9frPiA/145/bus" dev="sda1" ino=14277 res=1 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 audit: type=1804 audit(1674681120.244:51): pid=13445 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir2377385073/syzkaller.9frPiA/145/bus" dev="sda1" ino=14277 res=1 REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal REISERFS (device loop3): using ordered data mode reiserfs: using flush barriers REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop3): checking transaction log (loop3) REISERFS (device loop3): Using r5 hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal REISERFS (device loop3): using ordered data mode reiserfs: using flush barriers REISERFS (device loop3): journal params: device loop3, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop3): checking transaction log (loop3) REISERFS (device loop3): Using r5 hash to sort names REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50