IPVS: ftp: loaded support on port[0] = 21 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/22771 is trying to acquire lock: 000000005d4a66b9 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 but task is already holding lock: 000000000d11b2ca (&tree->tree_lock){+.+.}, at: hfsplus_find_init+0x1b7/0x220 fs/hfsplus/bfind.c:30 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&tree->tree_lock){+.+.}: 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 -> #0 (&HFSPLUS_I(inode)->extents_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x298/0x440 fs/hfsplus/btree.c:357 hfsplus_create_cat+0x1e3/0x1210 fs/hfsplus/catalog.c:272 hfsplus_fill_super+0x14a8/0x19e0 fs/hfsplus/super.c:560 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); lock(&tree->tree_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** 3 locks held by syz-executor.2/22771: #0: 000000001b7da4df (&type->s_umount_key#51/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 000000001b7da4df (&type->s_umount_key#51/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 #1: 000000001f8217b9 (&sbi->vh_mutex){+.+.}, at: hfsplus_fill_super+0x1421/0x19e0 fs/hfsplus/super.c:553 #2: 000000000d11b2ca (&tree->tree_lock){+.+.}, at: hfsplus_find_init+0x1b7/0x220 fs/hfsplus/bfind.c:30 stack backtrace: CPU: 0 PID: 22771 Comm: syz-executor.2 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_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x298/0x440 fs/hfsplus/btree.c:357 hfsplus_create_cat+0x1e3/0x1210 fs/hfsplus/catalog.c:272 hfsplus_fill_super+0x14a8/0x19e0 fs/hfsplus/super.c:560 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 RIP: 0033:0x7fbdf6f7d62a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007fbdf54edf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000000061b RCX: 00007fbdf6f7d62a RDX: 0000000020000600 RSI: 00000000200001c0 RDI: 00007fbdf54edfe0 RBP: 00007fbdf54ee020 R08: 00007fbdf54ee020 R09: 0000000001a00010 R10: 0000000001a00010 R11: 0000000000000202 R12: 0000000020000600 IPVS: ftp: loaded support on port[0] = 21 R13: 00000000200001c0 R14: 00007fbdf54edfe0 R15: 0000000020000140 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount audit: type=1804 audit(1676196435.990:2911): pid=22866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/420/file0/bus" dev="loop5" ino=41 res=1 audit: type=1800 audit(1676196435.990:2912): pid=22866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="loop5" ino=41 res=0 audit: type=1804 audit(1676196435.990:2913): pid=22866 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/420/file0/bus" dev="loop5" ino=41 res=1 XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 audit: type=1800 audit(1676196436.280:2914): pid=22900 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=13884 res=0 audit: type=1804 audit(1676196436.380:2915): pid=22929 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/421/bus" dev="sda1" ino=13939 res=1 audit: type=1800 audit(1676196436.380:2916): pid=22929 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=13939 res=0 audit: type=1804 audit(1676196436.410:2917): pid=22925 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/421/bus" dev="sda1" ino=13939 res=1 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount kauditd_printk_skb: 77 callbacks suppressed audit: type=1804 audit(1676196439.530:2995): pid=23254 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/425/file0/bus" dev="loop5" ino=41 res=1 XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1676196440.431:2996): pid=23319 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/426/bus" dev="sda1" ino=14563 res=1 audit: type=1800 audit(1676196440.431:2997): pid=23319 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14563 res=0 audit: type=1804 audit(1676196440.491:2998): pid=23321 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/426/bus" dev="sda1" ino=14563 res=1 IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem audit: type=1804 audit(1676196440.851:2999): pid=23388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/427/bus" dev="sda1" ino=14769 res=1 audit: type=1800 audit(1676196440.851:3000): pid=23388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14769 res=0 audit: type=1804 audit(1676196440.851:3001): pid=23388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/427/bus" dev="sda1" ino=14769 res=1 audit: type=1800 audit(1676196440.851:3002): pid=23388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14769 res=0 audit: type=1804 audit(1676196440.851:3003): pid=23388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/427/bus" dev="sda1" ino=14769 res=1 audit: type=1800 audit(1676196440.851:3004): pid=23388 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14769 res=0 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount XFS (loop5): Unmounting Filesystem IPVS: ftp: loaded support on port[0] = 21 kauditd_printk_skb: 70 callbacks suppressed audit: type=1800 audit(1676196444.551:3075): pid=23692 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="bus" dev="sda1" ino=14515 res=0 audit: type=1800 audit(1676196444.581:3076): pid=23692 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="bus" dev="sda1" ino=14515 res=0 audit: type=1800 audit(1676196444.581:3077): pid=23692 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.0" name="bus" dev="sda1" ino=14515 res=0 XFS (loop5): Mounting V4 Filesystem XFS (loop5): Ending clean mount audit: type=1804 audit(1676196444.731:3078): pid=23719 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/431/file0/bus" dev="loop5" ino=41 res=1 audit: type=1800 audit(1676196444.761:3079): pid=23719 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="loop5" ino=41 res=0 audit: type=1804 audit(1676196444.821:3080): pid=23754 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.5" name="/root/syzkaller-testdir4137004605/syzkaller.cSE9UZ/431/file0/bus" dev="loop5" ino=41 res=1