hfsplus: xattr searching failed ============================================ WARNING: possible recursive locking detected 4.14.302-syzkaller #0 Not tainted -------------------------------------------- syz-executor322/7988 is trying to acquire lock: (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: [] hfsplus_get_block+0x1f9/0x820 fs/hfsplus/extents.c:260 but task is already holding lock: (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: [] hfsplus_file_truncate+0x1ba/0xe80 fs/hfsplus/extents.c:571 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 5 locks held by syz-executor322/7988: #0: (sb_writers#10){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#10){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&sb->s_type->i_mutex_key#17){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #1: (&sb->s_type->i_mutex_key#17){+.+.}, at: [] do_truncate+0xf0/0x1a0 fs/open.c:61 #2: (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: [] hfsplus_file_truncate+0x1ba/0xe80 fs/hfsplus/extents.c:571 #3: (&tree->tree_lock/1){+.+.}, at: [] hfsplus_find_init+0x161/0x220 fs/hfsplus/bfind.c:33 #4: (&sbi->alloc_mutex){+.+.}, at: [] hfsplus_block_free+0xc7/0x560 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 1 PID: 7988 Comm: syz-executor322 Not tainted 4.14.302-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_deadlock_bug kernel/locking/lockdep.c:1800 [inline] check_deadlock kernel/locking/lockdep.c:1847 [inline] validate_chain kernel/locking/lockdep.c:2448 [inline] __lock_acquire.cold+0x180/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 hfsplus_get_block+0x1f9/0x820 fs/hfsplus/extents.c:260 block_read_full_page+0x25e/0x8d0 fs/buffer.c:2316 do_read_cache_page+0x38e/0xc10 mm/filemap.c:2713 read_mapping_page include/linux/pagemap.h:398 [inline] hfsplus_block_free+0x177/0x560 fs/hfsplus/bitmap.c:185 hfsplus_free_extents+0x170/0x440 fs/hfsplus/extents.c:360 hfsplus_file_truncate+0xbc0/0xe80 fs/hfsplus/extents.c:585 hfsplus_setattr+0x182/0x310 fs/hfsplus/inode.c:264 notify_change+0x56b/0xd10 fs/attr.c:315 do_truncate+0xff/0x1a0 fs/open.c:63 handle_truncate fs/namei.c:3010 [inline] do_last fs/namei.c:3437 [inline] path_openat+0x1dcc/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x5e/0xd3 RIP: 0033:0x7fcc082eb779 RSP: 002b:00007ffdc8248a98 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007fcc082eb779 RDX: 00007fcc082a9df3 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007fcc082ab010 R08: 00000000000005cd R09: 0000000000000000 R10: 00007ffdc8248960 R11: 0000000000000246 R12: 00007fcc082ab0a0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000