audit: type=1804 audit(1678140417.482:980): pid=2255 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3783996409/syzkaller.y1Q4vK/652/bus" dev="sda1" ino=15639 res=1 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/2253 is trying to acquire lock: 0000000079ee2e6d (&tree->tree_lock){+.+.}, at: hfsplus_file_truncate+0xde7/0x1040 fs/hfsplus/extents.c:595 but task is already holding lock: 00000000669fefe1 (&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.3/2253: #0: 00000000813ed864 (sb_writers#21){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000813ed864 (sb_writers#21){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 000000002afe6506 (&sb->s_type->i_mutex_key#27){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 000000002afe6506 (&sb->s_type->i_mutex_key#27){+.+.}, at: do_truncate+0x125/0x1f0 fs/open.c:61 #2: 00000000669fefe1 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 stack backtrace: CPU: 0 PID: 2253 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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: 0033:0x7f3e9765c0f9 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:00007f3e95bad168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f3e9777c050 RCX: 00007f3e9765c0f9 RDX: 0000000000000000 RSI: 0000000000143242 RDI: 0000000020000000 RBP: 00007f3e976b7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffd3ea531f R14: 00007f3e95bad300 R15: 0000000000022000 audit: type=1804 audit(1678140418.063:981): pid=2251 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1428267817/syzkaller.6dcpw1/613/bus" dev="sda1" ino=15641 res=1 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. audit: type=1804 audit(1678140418.063:982): pid=2251 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir1428267817/syzkaller.6dcpw1/613/bus" dev="sda1" ino=15641 res=1 audit: type=1804 audit(1678140418.323:983): pid=2261 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir1428267817/syzkaller.6dcpw1/613/bus" dev="sda1" ino=15641 res=1 IPVS: sync thread started: state = BACKUP, mcast_ifn = macvlan1, syncid = 3, id = 0 audit: type=1804 audit(1678140418.323:984): pid=2263 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir1428267817/syzkaller.6dcpw1/613/bus" dev="sda1" ino=15641 res=1 IPVS: stopping backup sync thread 2290 ... netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 'syz-executor.0': attribute type 4 has an invalid length. netlink: 4632 bytes leftover after parsing attributes in process `syz-executor.0'. IPVS: ftp: loaded support on port[0] = 21 netlink: 'syz-executor.0': attribute type 4 has an invalid length. netlink: 4632 bytes leftover after parsing attributes in process `syz-executor.0'. can: request_module (can-proto-0) failed. netlink: 'syz-executor.0': attribute type 4 has an invalid length. netlink: 4632 bytes leftover after parsing attributes in process `syz-executor.0'. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. netlink: 'syz-executor.0': attribute type 1 has an invalid length. IPv6: ADDRCONF(NETDEV_UP): bond3: link is not ready can: request_module (can-proto-0) failed. 8021q: adding VLAN 0 to HW filter on device bond3 bond3: making interface bridge0 the new active one bond3: Enslaving bridge0 as an active interface with an up link IPv6: ADDRCONF(NETDEV_CHANGE): bond3: link becomes ready netlink: 'syz-executor.0': attribute type 1 has an invalid length. netlink: 'syz-executor.0': attribute type 1 has an invalid length. IPv6: ADDRCONF(NETDEV_UP): bond4: link is not ready 8021q: adding VLAN 0 to HW filter on device bond4 bond4: making interface bridge1 the new active one bond4: Enslaving bridge1 as an active interface with an up link IPv6: ADDRCONF(NETDEV_CHANGE): bond4: link becomes ready netlink: 'syz-executor.4': attribute type 1 has an invalid length. IPv6: ADDRCONF(NETDEV_UP): bond1: link is not ready 8021q: adding VLAN 0 to HW filter on device bond1 bond1: making interface bridge1 the new active one bond1: Enslaving bridge1 as an active interface with an up link IPv6: ADDRCONF(NETDEV_CHANGE): bond1: link becomes ready netlink: 'syz-executor.4': attribute type 1 has an invalid length. IPv6: ADDRCONF(NETDEV_UP): bond2: link is not ready 8021q: adding VLAN 0 to HW filter on device bond2 bond2: making interface bridge2 the new active one bond2: Enslaving bridge2 as an active interface with an up link IPv6: ADDRCONF(NETDEV_CHANGE): bond2: link becomes ready netlink: 'syz-executor.4': attribute type 1 has an invalid length. IPv6: ADDRCONF(NETDEV_UP): bond3: link is not ready 8021q: adding VLAN 0 to HW filter on device bond3 bond3: making interface bridge3 the new active one bond3: Enslaving bridge3 as an active interface with an up link IPv6: ADDRCONF(NETDEV_CHANGE): bond3: link becomes ready netlink: 'syz-executor.4': attribute type 1 has an invalid length. IPv6: ADDRCONF(NETDEV_UP): bond4: link is not ready 8021q: adding VLAN 0 to HW filter on device bond4 bond4: making interface bridge4 the new active one bond4: Enslaving bridge4 as an active interface with an up link IPv6: ADDRCONF(NETDEV_CHANGE): bond4: link becomes ready IPv6: ADDRCONF(NETDEV_UP): bond5: link is not ready 8021q: adding VLAN 0 to HW filter on device bond5 bond5: making interface bridge5 the new active one bond5: Enslaving bridge5 as an active interface with an up link IPv6: ADDRCONF(NETDEV_CHANGE): bond5: link becomes ready IPv6: ADDRCONF(NETDEV_UP): bond6: link is not ready 8021q: adding VLAN 0 to HW filter on device bond6 bond6: making interface bridge6 the new active one bond6: Enslaving bridge6 as an active interface with an up link IPv6: ADDRCONF(NETDEV_CHANGE): bond6: link becomes ready