====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/17170 is trying to acquire lock: 000000005f2a1bf8 (&tree->tree_lock){+.+.}, at: hfsplus_file_truncate+0xde7/0x1040 fs/hfsplus/extents.c:595 but task is already holding lock: 00000000dbfe5040 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFSPLUS_I(inode)->extents_lock){+.+.}: hfsplus_get_block+0x292/0x960 fs/hfsplus/extents.c:260 block_read_full_page+0x288/0xd10 fs/buffer.c:2259 do_read_cache_page+0x533/0x1170 mm/filemap.c:2828 read_mapping_page include/linux/pagemap.h:402 [inline] __hfs_bnode_create+0x5b7/0xb60 fs/hfsplus/bnode.c:447 hfsplus_bnode_find+0x2aa/0xb80 fs/hfsplus/bnode.c:497 hfsplus_brec_find+0x2af/0x500 fs/hfsplus/bfind.c:183 hfsplus_brec_read+0x28/0x120 fs/hfsplus/bfind.c:222 hfsplus_find_cat+0x1d0/0x480 fs/hfsplus/catalog.c:202 hfsplus_iget+0x400/0x790 fs/hfsplus/super.c:81 hfsplus_fill_super+0xc5f/0x19e0 fs/hfsplus/super.c:503 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 -> #0 (&tree->tree_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_file_truncate+0xde7/0x1040 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1e7/0x310 fs/hfsplus/inode.c:263 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x2308/0x2df0 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); *** DEADLOCK *** 3 locks held by syz-executor.3/17170: #0: 00000000e4c33bb1 (sb_writers#20){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000e4c33bb1 (sb_writers#20){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 0000000009467c32 (&sb->s_type->i_mutex_key#26){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 0000000009467c32 (&sb->s_type->i_mutex_key#26){+.+.}, at: do_truncate+0x125/0x1f0 fs/open.c:61 #2: 00000000dbfe5040 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 stack backtrace: CPU: 0 PID: 17170 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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 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 hfsplus_file_truncate+0xde7/0x1040 fs/hfsplus/extents.c:595 hfsplus_setattr+0x1e7/0x310 fs/hfsplus/inode.c:263 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x2308/0x2df0 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 RIP: 0033:0x7fad7a1990f9 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:00007fad7870b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fad7a2b8f80 RCX: 00007fad7a1990f9 RDX: 0000000000000000 RSI: 0000000000143242 RDI: 0000000020000000 RBP: 00007fad7a1f4ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdab18700f R14: 00007fad7870b300 R15: 0000000000022000 audit: type=1804 audit(1676308146.717:64): pid=17279 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1295272203/syzkaller.BC7BLW/296/bus" dev="sda1" ino=14827 res=1 audit: type=1804 audit(1676308146.937:65): pid=17320 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3926598684/syzkaller.irfhtA/284/bus" dev="sda1" ino=13922 res=1 audit: type=1804 audit(1676308147.537:66): pid=17351 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1579250617/syzkaller.57t2pc/282/bus" dev="sda1" ino=14658 res=1 XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop2): Unmounting Filesystem audit: type=1804 audit(1676308147.697:67): pid=17381 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir1295272203/syzkaller.BC7BLW/298/bus" dev="sda1" ino=14835 res=1 audit: type=1804 audit(1676308147.757:68): pid=17391 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir2111367341/syzkaller.6tgPwt/274/bus" dev="sda1" ino=14837 res=1 audit: type=1804 audit(1676308147.777:69): pid=17405 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3926598684/syzkaller.irfhtA/285/bus" dev="sda1" ino=14839 res=1 audit: type=1804 audit(1676308147.787:70): pid=17389 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir294230090/syzkaller.zS7yf8/253/bus" dev="sda1" ino=14838 res=1 audit: type=1804 audit(1676308147.877:71): pid=17390 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1579250617/syzkaller.57t2pc/283/bus" dev="sda1" ino=14824 res=1 audit: type=1804 audit(1676308148.128:72): pid=17428 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir294230090/syzkaller.zS7yf8/254/bus" dev="sda1" ino=14848 res=1 audit: type=1804 audit(1676308148.128:73): pid=17427 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3926598684/syzkaller.irfhtA/286/bus" dev="sda1" ino=14849 res=1 XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop2): Unmounting Filesystem XFS (loop0): Mounting V4 Filesystem XFS (loop0): Ending clean mount XFS (loop4): Mounting V4 Filesystem XFS (loop0): Unmounting Filesystem XFS (loop4): Ending clean mount XFS (loop4): Unmounting Filesystem XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop2): Unmounting Filesystem print_req_error: 38 callbacks suppressed print_req_error: I/O error, dev loop0, sector 8 buffer_io_error: 38 callbacks suppressed Buffer I/O error on dev loop0p4, logical block 8, async page read print_req_error: I/O error, dev loop0, sector 9 Buffer I/O error on dev loop0p4, logical block 9, async page read print_req_error: I/O error, dev loop0, sector 10 Buffer I/O error on dev loop0p4, logical block 10, async page read print_req_error: I/O error, dev loop0, sector 11 Buffer I/O error on dev loop0p4, logical block 11, async page read print_req_error: I/O error, dev loop0, sector 12 Buffer I/O error on dev loop0p4, logical block 12, async page read print_req_error: I/O error, dev loop0, sector 13 Buffer I/O error on dev loop0p4, logical block 13, async page read print_req_error: I/O error, dev loop0, sector 14 Buffer I/O error on dev loop0p4, logical block 14, async page read print_req_error: I/O error, dev loop0, sector 15 Buffer I/O error on dev loop0p4, logical block 15, async page read XFS (loop4): Mounting V4 Filesystem XFS (loop4): Ending clean mount XFS (loop0): Mounting V4 Filesystem XFS (loop4): Unmounting Filesystem XFS (loop0): Ending clean mount XFS (loop0): Unmounting Filesystem print_req_error: I/O error, dev loop0, sector 8 Buffer I/O error on dev loop0p4, logical block 8, async page read print_req_error: I/O error, dev loop0, sector 9 Buffer I/O error on dev loop0p4, logical block 9, async page read XFS (loop4): Mounting V4 Filesystem XFS (loop4): Ending clean mount XFS (loop4): Unmounting Filesystem XFS (loop0): Mounting V4 Filesystem XFS (loop0): Ending clean mount XFS (loop0): Unmounting Filesystem kauditd_printk_skb: 25 callbacks suppressed audit: type=1804 audit(1676308151.738:99): pid=17803 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir4103498902/syzkaller.BWPDdl/286/bus" dev="sda1" ino=14864 res=1 audit: type=1804 audit(1676308151.778:100): pid=17805 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir294230090/syzkaller.zS7yf8/260/bus" dev="sda1" ino=14867 res=1 audit: type=1804 audit(1676308151.828:101): pid=17831 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3926598684/syzkaller.irfhtA/297/bus" dev="sda1" ino=14883 res=1 audit: type=1804 audit(1676308151.968:102): pid=17852 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir294230090/syzkaller.zS7yf8/261/bus" dev="sda1" ino=14275 res=1 audit: type=1804 audit(1676308152.018:103): pid=17861 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir4103498902/syzkaller.BWPDdl/287/bus" dev="sda1" ino=14859 res=1 XFS (loop0): Mounting V4 Filesystem XFS (loop0): Ending clean mount XFS (loop0): Unmounting Filesystem audit: type=1804 audit(1676308152.498:104): pid=17905 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3926598684/syzkaller.irfhtA/298/bus" dev="sda1" ino=14821 res=1 audit: type=1804 audit(1676308152.498:105): pid=17903 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir294230090/syzkaller.zS7yf8/262/bus" dev="sda1" ino=13889 res=1 audit: type=1804 audit(1676308152.718:106): pid=17943 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3926598684/syzkaller.irfhtA/299/bus" dev="sda1" ino=14866 res=1 audit: type=1804 audit(1676308152.778:107): pid=17944 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir294230090/syzkaller.zS7yf8/263/bus" dev="sda1" ino=14888 res=1 XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop0): Mounting V4 Filesystem XFS (loop2): Unmounting Filesystem XFS (loop0): Ending clean mount XFS (loop0): Unmounting Filesystem audit: type=1804 audit(1676308153.508:108): pid=17997 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir3926598684/syzkaller.irfhtA/300/bus" dev="sda1" ino=14892 res=1 XFS (loop0): Mounting V4 Filesystem XFS (loop0): Ending clean mount XFS (loop0): Unmounting Filesystem XFS (loop2): Mounting V4 Filesystem XFS (loop2): Ending clean mount XFS (loop2): Unmounting Filesystem