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 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. 4.14.305-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/9956 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: overlayfs: fs on 'file0' does not support file handles, falling back to index=off. (&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 overlayfs: fs on './file0' does not support file handles, falling back to index=off. (&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 overlayfs: fs on './file0' does not support file handles, falling back to index=off. 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){.+.+}: 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- overlayfs: fs on 'file0' does not support file handles, falling back to index=off. lock(&ovl_i_mutex_dir_key[depth]#2); lock(sb_writers#6); lock(&ovl_i_mutex_dir_key[depth]#2); lock(sb_writers#6); overlayfs: fs on './file0' does not support file handles, falling back to index=off. *** DEADLOCK *** 2 locks held by syz-executor.5/9956: #0: (sb_writers#14){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#14){.+.+}, 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: 1 PID: 9956 Comm: syz-executor.5 Not tainted 4.14.305-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: 0033:0x7f39b640b0f9 RSP: 002b:00007f39b495c168 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 00007f39b652b050 RCX: 00007f39b640b0f9 RDX: 0000000020000980 RSI: 0000000020000300 RDI: 0000000020000280 RBP: 00007f39b6466ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000004c R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcd082cd8f R14: 00007f39b495c300 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. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. Protocol error: SET target dimension is over the limit! netlink: 76 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. Protocol error: SET target dimension is over the limit! netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. REISERFS (device loop1): found reiserfs format "3.5" with non-standard journal REISERFS (device loop1): using ordered data mode Protocol error: SET target dimension is over the limit! netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. 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 netlink: 76 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop1): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. audit: type=1804 audit(1676968813.877:2): pid=10053 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3940356611/syzkaller.Vcf9dR/28/file0/bus" dev="loop1" ino=2 res=1 audit: type=1804 audit(1676968813.947:3): pid=10087 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir3940356611/syzkaller.Vcf9dR/28/file0/bus" dev="loop1" ino=2 res=1 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.2'. Protocol error: SET target dimension is over the limit! netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. REISERFS (device loop1): found reiserfs format "3.5" with non-standard journal REISERFS (device loop5): found reiserfs format "3.5" with non-standard journal REISERFS (device loop5): using ordered data mode REISERFS (device loop1): using ordered data mode reiserfs: using flush barriers 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 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 loop5): checking transaction log (loop5) REISERFS (device loop1): Using r5 hash to sort names REISERFS (device loop5): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. reiserfs: enabling write barrier flush mode REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. audit: type=1804 audit(1676968814.417:4): pid=10103 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3940356611/syzkaller.Vcf9dR/29/file0/bus" dev="loop1" ino=2 res=1 audit: type=1804 audit(1676968814.457:5): pid=10102 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir3386827039/syzkaller.ffo6LO/29/file0/bus" dev="loop5" ino=2 res=1 audit: type=1804 audit(1676968814.527:7): pid=10150 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir3386827039/syzkaller.ffo6LO/29/file0/bus" dev="loop5" ino=2 res=1 audit: type=1804 audit(1676968814.527:6): pid=10149 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir3940356611/syzkaller.Vcf9dR/29/file0/bus" dev="loop1" ino=2 res=1 ====================================================== WARNING: the mand mount option is being deprecated and will be removed in v5.15! ====================================================== IPVS: ftp: loaded support on port[0] = 21 REISERFS (device loop5): found reiserfs format "3.5" with non-standard journal 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) REISERFS (device loop5): Using r5 hash to sort names REISERFS (device loop1): found reiserfs format "3.5" with non-standard journal reiserfs: enabling write barrier flush mode REISERFS (device loop1): using ordered data mode REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. 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 audit: type=1804 audit(1676968815.027:8): pid=10167 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir3386827039/syzkaller.ffo6LO/30/file0/bus" dev="loop5" ino=2 res=1 REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop1): Using r5 hash to sort names audit: type=1804 audit(1676968815.107:9): pid=10236 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.5" name="/root/syzkaller-testdir3386827039/syzkaller.ffo6LO/30/file0/bus" dev="loop5" ino=2 res=1 reiserfs: enabling write barrier flush mode REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. audit: type=1804 audit(1676968815.177:10): pid=10197 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3940356611/syzkaller.Vcf9dR/30/file0/bus" dev="loop1" ino=2 res=1 audit: type=1804 audit(1676968815.267:11): pid=10241 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir3940356611/syzkaller.Vcf9dR/30/file0/bus" dev="loop1" ino=2 res=1 REISERFS (device loop5): found reiserfs format "3.5" with non-standard journal 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 loop1): found reiserfs format "3.5" with non-standard journal REISERFS (device loop1): using ordered data mode reiserfs: using flush barriers REISERFS (device loop5): checking transaction log (loop5) 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 loop5): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. REISERFS (device loop1): checking transaction log (loop1) REISERFS (device loop1): Using r5 hash to sort names reiserfs: enabling write barrier flush mode REISERFS (device loop1): Created .reiserfs_priv - reserved for xattr storage. SQUASHFS error: lzo decompression failed, data probably corrupt SQUASHFS error: squashfs_read_data failed to read block 0x8f SQUASHFS error: Unable to read metadata cache entry [8f] SQUASHFS error: Unable to read inode 0x11f SQUASHFS error: lzo decompression failed, data probably corrupt SQUASHFS error: squashfs_read_data failed to read block 0x8f SQUASHFS error: Unable to read metadata cache entry [8f] SQUASHFS error: Unable to read inode 0x11f SQUASHFS error: lzo decompression failed, data probably corrupt SQUASHFS error: squashfs_read_data failed to read block 0x8f nla_parse: 23 callbacks suppressed netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. SQUASHFS error: Unable to read metadata cache entry [8f] SQUASHFS error: Unable to read inode 0x11f netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. SQUASHFS error: lzo decompression failed, data probably corrupt SQUASHFS error: squashfs_read_data failed to read block 0x8f SQUASHFS error: Unable to read metadata cache entry [8f] SQUASHFS error: Unable to read inode 0x11f