============================================ WARNING: possible recursive locking detected 4.19.211-syzkaller #0 Not tainted -------------------------------------------- syz-executor.5/19602 is trying to acquire lock: 00000000b8507475 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_get_block+0x292/0x960 fs/hfsplus/extents.c:260 but task is already holding lock: 000000004d036b70 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by syz-executor.5/19602: #0: 00000000958512fa (sb_writers#14){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000958512fa (sb_writers#14){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 audit: type=1804 audit(1676987006.615:381): pid=19623 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/17/file0" dev="sda1" ino=13993 res=1 #1: 00000000e7efe7f1 (&sb->s_type->i_mutex_key#21){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000e7efe7f1 (&sb->s_type->i_mutex_key#21){+.+.}, at: do_truncate+0x125/0x1f0 fs/open.c:61 #2: 000000004d036b70 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 #3: 0000000094b0f446 (&sbi->alloc_mutex){+.+.}, at: hfsplus_block_free+0xdb/0x5d0 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 1 PID: 19602 Comm: syz-executor.5 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_deadlock_bug kernel/locking/lockdep.c:1764 [inline] check_deadlock kernel/locking/lockdep.c:1808 [inline] validate_chain kernel/locking/lockdep.c:2404 [inline] __lock_acquire.cold+0x121/0x57e 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_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] hfsplus_block_free+0x18b/0x5d0 fs/hfsplus/bitmap.c:185 hfsplus_free_extents+0x228/0x520 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0xd96/0x1040 fs/hfsplus/extents.c:591 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 audit: type=1804 audit(1676987006.615:382): pid=19622 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/17/file0" dev="sda1" ino=13993 res=1 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f5d43bf70f9 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:00007f5d42169168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f5d43d16f80 RCX: 00007f5d43bf70f9 RDX: 0000000000000000 RSI: 0000000000143242 RDI: 0000000020000000 RBP: 00007f5d43c52ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd178de16f R14: 00007f5d42169300 R15: 0000000000022000 hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent audit: type=1804 audit(1676987007.826:383): pid=19694 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/18/file0" dev="sda1" ino=13962 res=1 hfsplus: extend alloc file! (0,512,367) audit: type=1804 audit(1676987007.826:384): pid=19694 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/18/file0" dev="sda1" ino=13962 res=1 audit: type=1804 audit(1676987007.826:385): pid=19694 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/18/file0" dev="sda1" ino=13962 res=1 audit: type=1804 audit(1676987007.826:386): pid=19694 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/18/file0" dev="sda1" ino=13962 res=1 hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent kauditd_printk_skb: 57 callbacks suppressed audit: type=1804 audit(1676987008.686:444): pid=19784 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/20/file0" dev="sda1" ino=13989 res=1 hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent audit: type=1804 audit(1676987008.716:445): pid=19771 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/20/file0" dev="sda1" ino=13989 res=1 audit: type=1804 audit(1676987009.026:446): pid=19826 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/21/file0" dev="sda1" ino=13884 res=1 audit: type=1804 audit(1676987009.056:447): pid=19826 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/21/file0" dev="sda1" ino=13884 res=1 audit: type=1804 audit(1676987009.056:448): pid=19825 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir677917983/syzkaller.SgbTiX/21/file0" dev="sda1" ino=13884 res=1 hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent hfsplus: unable to mark blocks free: error -5 hfsplus: can't free extent audit: type=1804 audit(1676987011.426:449): pid=20171 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3522561313/syzkaller.68hHxO/1075/bus/file1" dev="loop2" ino=20 res=1 nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead. audit: type=1804 audit(1676987011.786:450): pid=20200 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3522561313/syzkaller.68hHxO/1076/bus/file1" dev="loop2" ino=20 res=1 hfsplus: extend alloc file! (8,512,367) audit: type=1804 audit(1676987012.316:451): pid=20246 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3522561313/syzkaller.68hHxO/1077/bus/file1" dev="loop2" ino=20 res=1 hfsplus: extend alloc file! (16,512,367) hfsplus: extend alloc file! (48,512,367) hfsplus: extend alloc file! (64,512,367) hfsplus: extend alloc file! (80,512,367) hfsplus: extend alloc file! (96,512,367) hfsplus: extend alloc file! (512,512,1)