overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. ====================================================== overlayfs: fs on './file0' does not support file handles, falling back to index=off. WARNING: possible circular locking dependency detected 4.14.306-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/10217 is trying to acquire lock: (sb_writers#6){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] (sb_writers#6){.+.+}, 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: [] vfs_setxattr+0xb1/0x230 fs/xattr.c:255 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#6){.+.+}: overlayfs: fs on 'file0' does not support file handles, falling back to index=off. 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_xattr_set+0x4d/0x290 fs/overlayfs/inode.c:214 overlayfs: fs on './file0' does not support file handles, falling back to index=off. ovl_posix_acl_xattr_set+0x2b7/0x830 fs/overlayfs/super.c:762 __vfs_setxattr+0xdc/0x130 fs/xattr.c:150 __vfs_setxattr_noperm+0xfd/0x3d0 fs/xattr.c:181 __vfs_setxattr_locked+0x14d/0x250 fs/xattr.c:239 vfs_setxattr+0xcf/0x230 fs/xattr.c:256 setxattr+0x1a9/0x300 fs/xattr.c:523 path_setxattr+0x118/0x130 fs/xattr.c:542 SYSC_lsetxattr fs/xattr.c:564 [inline] SyS_lsetxattr+0x33/0x40 fs/xattr.c:560 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#6); lock(&ovl_i_mutex_dir_key[depth]#2); lock(sb_writers#6); *** DEADLOCK *** 2 locks held by syz-executor.3/10217: #0: (sb_writers#15){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#15){.+.+}, 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: [] vfs_setxattr+0xb1/0x230 fs/xattr.c:255 stack backtrace: CPU: 0 PID: 10217 Comm: syz-executor.3 Not tainted 4.14.306-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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_xattr_set+0x4d/0x290 fs/overlayfs/inode.c:214 ovl_posix_acl_xattr_set+0x2b7/0x830 fs/overlayfs/super.c:762 __vfs_setxattr+0xdc/0x130 fs/xattr.c:150 __vfs_setxattr_noperm+0xfd/0x3d0 fs/xattr.c:181 __vfs_setxattr_locked+0x14d/0x250 fs/xattr.c:239 vfs_setxattr+0xcf/0x230 fs/xattr.c:256 setxattr+0x1a9/0x300 fs/xattr.c:523 path_setxattr+0x118/0x130 fs/xattr.c:542 SYSC_lsetxattr fs/xattr.c:564 [inline] SyS_lsetxattr+0x33/0x40 fs/xattr.c:560 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fd49efd20f9 RSP: 002b:00007fd49d544168 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007fd49f0f1f80 RCX: 00007fd49efd20f9 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. RDX: 0000000020000980 RSI: 0000000020000300 RDI: 0000000020000280 RBP: 00007fd49f02dae9 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000004c R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef9462aef R14: 00007fd49d544300 R15: 0000000000022000 overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. F2FS-fs (loop4): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b attempt to access beyond end of device loop4: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop4: rw=1, want=81928, limit=63271 F2FS-fs (loop4): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b attempt to access beyond end of device loop4: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop4: rw=1, want=81928, limit=63271 attempt to access beyond end of device loop5: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop5: rw=1, want=81928, limit=63271 attempt to access beyond end of device loop3: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop3: rw=1, want=81928, limit=63271 attempt to access beyond end of device loop0: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop0: rw=1, want=81928, limit=63271 attempt to access beyond end of device loop4: rw=1, want=81920, limit=63271 attempt to access beyond end of device attempt to access beyond end of device loop4: rw=1, want=81928, limit=63271 loop1: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop1: rw=1, want=81928, limit=63271 attempt to access beyond end of device loop5: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop5: rw=1, want=81928, limit=63271 attempt to access beyond end of device loop3: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop3: rw=1, want=81928, limit=63271 f2fs_msg: 44 callbacks suppressed F2FS-fs (loop4): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop4): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop4): invalid crc value F2FS-fs (loop4): Found nat_bits in checkpoint F2FS-fs (loop1): Mounted with checkpoint version = 753bd00b F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b attempt to access beyond end of device loop0: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop0: rw=1, want=81928, limit=63271 attempt to access beyond end of device loop1: rw=1, want=81920, limit=63271 F2FS-fs (loop3): Mismatch start address, segment0(512) cp_blkaddr(605) attempt to access beyond end of device F2FS-fs (loop3): Can't find valid F2FS filesystem in 1th superblock loop1: rw=1, want=81928, limit=63271 F2FS-fs (loop3): invalid crc value F2FS-fs (loop3): Found nat_bits in checkpoint attempt to access beyond end of device loop4: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop4: rw=1, want=81928, limit=63271 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. attempt to access beyond end of device loop3: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop3: rw=1, want=81928, limit=63271 attempt to access beyond end of device loop5: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop5: rw=1, want=81928, limit=63271 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. attempt to access beyond end of device loop0: rw=1, want=81920, limit=63271 attempt to access beyond end of device loop0: rw=1, want=81928, limit=63271 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. REISERFS (device loop2): found reiserfs format "3.6" with non-standard journal REISERFS (device loop2): using ordered data mode netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. 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 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. REISERFS (device loop2): checking transaction log (loop2) attempt to access beyond end of device netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. loop1: rw=1, want=81920, limit=63271 attempt to access beyond end of device netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. loop1: rw=1, want=81928, limit=63271 REISERFS (device loop2): Using r5 hash to sort names REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage. base_sock_release(ffff88807540b4c0) sk= (null) IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready audit: type=1804 audit(1677072535.469:2): pid=10666 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir21255674/syzkaller.wmipBj/43/file1/bus" dev="loop2" ino=4 res=1 IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready audit: type=1800 audit(1677072535.779:3): pid=10732 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.5" name="file0" dev="sda1" ino=14078 res=0 IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready base_sock_release(ffff888075403900) sk=ffff88809928a580 audit: type=1804 audit(1677072535.789:4): pid=10730 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir4196819645/syzkaller.ctXZ0L/30/file0" dev="sda1" ino=14078 res=1 syz-executor.2 (10666) used greatest stack depth: 24656 bytes left CIFS VFS: Malformed UNC in devname.