loop0: detected capacity change from 0 to 64 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= hfs: request for non-existent node 8 in B*Tree hfs: request for non-existent node 8 in B*Tree ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.0/5346 is trying to acquire lock: ffff888038fec0b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x18e/0x300 fs/hfs/bfind.c:-1 but task is already holding lock: ffff8880001041f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xf2/0x15e0 fs/hfs/extent.c:397 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:614 [inline] __mutex_lock+0x19f/0x1300 kernel/locking/mutex.c:776 hfs_extend_file+0xf2/0x15e0 fs/hfs/extent.c:397 hfs_bmap_reserve+0x107/0x430 fs/hfs/btree.c:269 __hfs_ext_write_extent+0x1fa/0x470 fs/hfs/extent.c:121 __hfs_ext_cache_extent+0x6b/0x9b0 fs/hfs/extent.c:174 hfs_ext_read_extent fs/hfs/extent.c:202 [inline] hfs_extend_file+0x39b/0x15e0 fs/hfs/extent.c:401 hfs_get_block+0x412/0xc50 fs/hfs/extent.c:353 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2142 block_write_begin fs/buffer.c:2253 [inline] cont_write_begin+0x737/0xae0 fs/buffer.c:2591 hfs_write_begin+0x66/0xb0 fs/hfs/inode.c:53 cont_expand_zero fs/buffer.c:2519 [inline] cont_write_begin+0x2e7/0xae0 fs/buffer.c:2581 hfs_write_begin+0x66/0xb0 fs/hfs/inode.c:53 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4314 generic_file_write_iter+0x14a/0x680 mm/filemap.c:4457 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x61d/0xb90 fs/read_write.c:688 ksys_pwrite64 fs/read_write.c:795 [inline] __do_sys_pwrite64 fs/read_write.c:803 [inline] __se_sys_pwrite64 fs/read_write.c:800 [inline] __x64_sys_pwrite64+0x199/0x230 fs/read_write.c:800 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&tree->tree_lock/1){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/mutex.c:614 [inline] __mutex_lock+0x19f/0x1300 kernel/locking/mutex.c:776 hfs_find_init+0x18e/0x300 fs/hfs/bfind.c:-1 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x35c/0x15e0 fs/hfs/extent.c:401 hfs_bmap_reserve+0x107/0x430 fs/hfs/btree.c:269 hfs_cat_create+0x20f/0x800 fs/hfs/catalog.c:104 hfs_create+0x75/0xe0 fs/hfs/dir.c:202 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock/1); lock(&HFS_I(tree->inode)->extents_lock); lock(&tree->tree_lock/1); *** DEADLOCK *** 4 locks held by syz.0.0/5346: #0: ffff888038fee420 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493 #1: ffff888000103d20 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #1: ffff888000103d20 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:4580 [inline] #1: ffff888000103d20 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: path_openat+0xb4c/0x3860 fs/namei.c:4827 #2: ffff888038fea0b0 (&tree->tree_lock){+.+.}-{4:4}, at: hfs_find_init+0x18e/0x300 fs/hfs/bfind.c:-1 #3: ffff8880001041f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xf2/0x15e0 fs/hfs/extent.c:397 stack backtrace: CPU: 0 UID: 0 PID: 5346 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/mutex.c:614 [inline] __mutex_lock+0x19f/0x1300 kernel/locking/mutex.c:776 hfs_find_init+0x18e/0x300 fs/hfs/bfind.c:-1 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_extend_file+0x35c/0x15e0 fs/hfs/extent.c:401 hfs_bmap_reserve+0x107/0x430 fs/hfs/btree.c:269 hfs_cat_create+0x20f/0x800 fs/hfs/catalog.c:104 hfs_create+0x75/0xe0 fs/hfs/dir.c:202 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __x64_sys_openat+0x138/0x170 fs/open.c:1383 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdad259c629 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdad337d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fdad2815fa0 RCX: 00007fdad259c629 RDX: 0000000000000042 RSI: 00002000000002c0 RDI: ffffffffffffff9c RBP: 00007fdad2632b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdad2816038 R14: 00007fdad2815fa0 R15: 00007ffc756f7d48 hfs: request for non-existent node 9 in B*Tree hfs: request for non-existent node 9 in B*Tree syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4169, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4169, lost async page write syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4170, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4170, lost async page write syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4172, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4172, lost async page write syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4173, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4173, lost async page write syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4174, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4174, lost async page write syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4175, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4175, lost async page write syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4176, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4176, lost async page write syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4177, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4177, lost async page write syz.0.0: attempt to access beyond end of device loop0: rw=2049, sector=4178, nr_sectors = 16 limit=64 syz.0.0: attempt to access beyond end of device loop0: rw=8390657, sector=4196, nr_sectors = 1 limit=64 Buffer I/O error on dev loop0, logical block 4196, lost async page write Buffer I/O error on dev loop0, logical block 4197, lost async page write