rock: corrupted directory entry. extent=32, offset=2044, size=237 ====================================================== WARNING: possible circular locking dependency detected 4.14.307-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/11707 is trying to acquire lock: (sb_writers#3){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] (sb_writers#3){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 but task is already holding lock: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] inode_lock include/linux/fs.h:719 [inline] (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] do_last fs/namei.c:3331 [inline] (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] path_openat+0xde2/0x2970 fs/namei.c:3571 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ovl_i_mutex_dir_key[depth]#2){++++}: down_write_killable+0x37/0xb0 kernel/locking/rwsem.c:68 iterate_dir+0x387/0x5e0 fs/readdir.c:43 ovl_dir_read fs/overlayfs/readdir.c:306 [inline] ovl_dir_read_merged+0x2c5/0x430 fs/overlayfs/readdir.c:365 ovl_check_empty_dir+0x6e/0x200 fs/overlayfs/readdir.c:870 ovl_check_empty_and_clear+0x72/0xe0 fs/overlayfs/dir.c:306 ovl_rename+0x57d/0xe50 fs/overlayfs/dir.c:959 vfs_rename+0x560/0x1820 fs/namei.c:4498 SYSC_renameat2 fs/namei.c:4646 [inline] SyS_renameat2+0x95b/0xad0 fs/namei.c:4535 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 -> #0 (sb_writers#3){.+.+}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 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+0x64/0x260 fs/super.c:1342 sb_start_write include/linux/fs.h:1551 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 ovl_create_object+0x75/0x1d0 fs/overlayfs/dir.c:538 lookup_open+0x77a/0x1750 fs/namei.c:3241 do_last fs/namei.c:3334 [inline] path_openat+0xe08/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ovl_i_mutex_dir_key[depth]#2); lock(sb_writers#3); lock(&ovl_i_mutex_dir_key[depth]#2); lock(sb_writers#3); *** DEADLOCK *** 2 locks held by syz-executor.3/11707: #0: (sb_writers#17){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#17){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] inode_lock include/linux/fs.h:719 [inline] #1: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] do_last fs/namei.c:3331 [inline] #1: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] path_openat+0xde2/0x2970 fs/namei.c:3571 stack backtrace: CPU: 1 PID: 11707 Comm: syz-executor.3 Not tainted 4.14.307-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 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+0x64/0x260 fs/super.c:1342 sb_start_write include/linux/fs.h:1551 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 ovl_create_object+0x75/0x1d0 fs/overlayfs/dir.c:538 lookup_open+0x77a/0x1750 fs/namei.c:3241 do_last fs/namei.c:3334 [inline] path_openat+0xe08/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7ffbdf8bd0f9 RSP: 002b:00007ffbddded168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffbdf9dd120 RCX: 00007ffbdf8bd0f9 RDX: 0000000000000000 RSI: 0000000000181042 RDI: 0000000020000000 RBP: 00007ffbdf918ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffed0789a3f R14: 00007ffbddded300 R15: 0000000000022000 IPVS: ftp: loaded support on port[0] = 21 overlayfs: fs on './file0' does not support file handles, falling back to index=off. ISOFS: Interleaved files not (yet) supported. ISOFS: File unit size != 0 for ISO file (1856). F2FS-fs (loop5): Found nat_bits in checkpoint F2FS-fs (loop5): Mounted with checkpoint version = 48b305e5 audit: type=1804 audit(1677664270.882:96): pid=11768 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir521873726/syzkaller.3Gks54/53/file0/bus" dev="loop5" ino=10 res=1 audit: type=1804 audit(1677664270.882:97): pid=11768 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir521873726/syzkaller.3Gks54/53/file0/bus" dev="loop5" ino=10 res=1 attempt to access beyond end of device loop5: rw=2049, want=40432, limit=40427 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 loop4): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. base_sock_release(ffff8880945ffa00) sk= (null) audit: type=1804 audit(1677664274.751:98): pid=11848 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir2030058527/syzkaller.fvcuQa/55/file1/bus" dev="loop4" ino=4 res=1 audit: type=1804 audit(1677664274.841:99): pid=11871 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir2030058527/syzkaller.fvcuQa/55/file1/bus" dev="loop4" ino=4 res=1 base_sock_release(ffff88808ea6e080) sk=ffff8880954facc0 base_sock_release(ffff88808e9fcb00) sk=ffff8880a5754a40 REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop1): using ordered data mode reiserfs: using flush barriers REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal REISERFS (device loop0): using ordered data mode REISERFS (device loop4): using ordered data mode REISERFS (device loop2): found reiserfs format "3.6" with non-standard journal reiserfs: using flush barriers REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 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 loop1): Using r5 hash to sort names REISERFS (device loop2): using ordered data mode REISERFS (device loop0): checking transaction log (loop0) reiserfs: using flush barriers REISERFS (device loop2): journal params: device loop2, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop4): checking transaction log (loop4) REISERFS (device loop2): checking transaction log (loop2) base_sock_release(ffff88808e3be100) sk= (null) audit: type=1804 audit(1677664275.851:100): pid=11882 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir2006905666/syzkaller.mxucwV/66/file1/bus" dev="loop1" ino=4 res=1 REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop4): Using r5 hash to sort names audit: type=1804 audit(1677664275.941:101): pid=11919 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir2006905666/syzkaller.mxucwV/66/file1/bus" dev="loop1" ino=4 res=1 REISERFS (device loop2): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage. base_sock_release(ffff88808e3a49c0) sk= (null) REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal REISERFS (device loop3): using ordered data mode audit: type=1804 audit(1677664276.111:102): pid=11896 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir1023096250/syzkaller.JJsVNe/64/file1/bus" dev="loop0" ino=4 res=1 base_sock_release(ffff8880946449c0) sk= (null) reiserfs: using flush barriers base_sock_release(ffff8880a53ac140) sk= (null) 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 base_sock_release(ffff88808e3c0ac0) sk=ffff88809fae1700 REISERFS (device loop3): checking transaction log (loop3) base_sock_release(ffff888094641100) sk=ffff88808dbde140 base_sock_release(ffff88808e39ca40) sk=ffff888096683280 audit: type=1804 audit(1677664276.201:103): pid=11929 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.0" name="/root/syzkaller-testdir1023096250/syzkaller.JJsVNe/64/file1/bus" dev="loop0" ino=4 res=1 base_sock_release(ffff88808e3e9980) sk=ffff88808affc600 base_sock_release(ffff88808e3ad040) sk=ffff88808de7ca80 base_sock_release(ffff88808e3e9080) sk=ffff88806be8d1c0 base_sock_release(ffff88808ea6f540) sk=ffff88809cb791c0 base_sock_release(ffff88808e360580) sk=ffff88809d940880 audit: type=1804 audit(1677664276.241:104): pid=11897 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir3033669856/syzkaller.PMJ7g0/58/file1/bus" dev="loop2" ino=4 res=1 REISERFS (device loop3): Using r5 hash to sort names audit: type=1804 audit(1677664276.241:105): pid=11886 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir2030058527/syzkaller.fvcuQa/56/file1/bus" dev="loop4" ino=4 res=1 REISERFS (device loop5): found reiserfs format "3.6" with non-standard journal REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop5): using ordered data mode reiserfs: using flush barriers REISERFS (device loop5): journal params: device loop5, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop5): checking transaction log (loop5) base_sock_release(ffff88808d02d040) sk= (null) audit: type=1804 audit(1677664276.311:106): pid=11934 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.2" name="/root/syzkaller-testdir3033669856/syzkaller.PMJ7g0/58/file1/bus" dev="loop2" ino=4 res=1 REISERFS (device loop1): found reiserfs format "3.6" with non-standard journal REISERFS (device loop5): Using r5 hash to sort names REISERFS (device loop1): using ordered data mode REISERFS (device loop2): found reiserfs format "3.6" with non-standard journal base_sock_release(ffff88808d02b640) sk=ffff88808d65d740 reiserfs: using flush barriers REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. audit: type=1804 audit(1677664276.331:107): pid=11935 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir2030058527/syzkaller.fvcuQa/56/file1/bus" dev="loop4" ino=4 res=1 REISERFS (device loop2): using ordered data mode base_sock_release(ffff8880a52160c0) sk=ffff88808d6e4980 REISERFS (device loop1): journal params: device loop1, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop4): found reiserfs format "3.6" with non-standard journal reiserfs: using flush barriers REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal base_sock_release(ffff88808e3ce180) sk= (null) REISERFS (device loop0): using ordered data mode REISERFS (device loop4): using ordered data mode REISERFS (device loop1): checking transaction log (loop1) reiserfs: using flush barriers reiserfs: using flush barriers audit: type=1804 audit(1677664276.861:108): pid=11918 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir2568504577/syzkaller.WGnXEz/61/file1/bus" dev="loop3" ino=4 res=1 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 loop2): journal params: device loop2, 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 loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 audit: type=1804 audit(1677664276.931:109): pid=11965 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.3" name="/root/syzkaller-testdir2568504577/syzkaller.WGnXEz/61/file1/bus" dev="loop3" ino=4 res=1 REISERFS (device loop2): checking transaction log (loop2) REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop4): Using r5 hash to sort names REISERFS (device loop3): found reiserfs format "3.6" with non-standard journal audit: type=1804 audit(1677664277.181:110): pid=11941 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir521873726/syzkaller.3Gks54/57/file1/bus" dev="loop5" ino=4 res=1 REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop4): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop3): using ordered data mode base_sock_release(ffff88808fbfd080) sk=ffff88806b67d3c0 REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. base_sock_release(ffff88808e3ff640) sk=ffff88806be909c0 reiserfs: using flush barriers base_sock_release(ffff88808d0629c0) sk= (null) 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 loop2): Using r5 hash to sort names REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop3): checking transaction log (loop3) REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. base_sock_release(ffff88808d07a680) sk= (null) base_sock_release(ffff88808d07e000) sk= (null) base_sock_release(ffff88808d07a200) sk= (null) base_sock_release(ffff88808d022680) sk=ffff888099463140 REISERFS (device loop3): Using r5 hash to sort names base_sock_release(ffff88808d011100) sk=ffff88806a4d89c0 REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage. base_sock_release(ffff88808d043a80) sk=ffff88809d6ed500 base_sock_release(ffff88808d081540) sk=ffff88806aa46140 REISERFS (device loop5): found reiserfs format "3.6" with non-standard journal REISERFS (device loop5): using ordered data mode