loop0: detected capacity change from 0 to 1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 ============================================ WARNING: possible recursive locking detected syzkaller #0 Not tainted -------------------------------------------- syz.0.0/5323 is trying to acquire lock: ffff888052268740 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21c/0x1df0 fs/hfsplus/extents.c:457 but task is already holding lock: ffff888052266040 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21c/0x1df0 fs/hfsplus/extents.c:457 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 locks held by syz.0.0/5323: 4, last CPU#0: #0: ffff888012e22460 (sb_writers#12){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 fs/splice.c:1158 #1: ffff8880522661d8 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline] #1: ffff8880522661d8 (&sb->s_type->i_mutex_key#24){+.+.}-{4:4}, at: generic_file_write_iter+0x82/0x330 mm/filemap.c:4514 #2: ffff888052266040 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21c/0x1df0 fs/hfsplus/extents.c:457 #3: ffff88805b2ce0a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x179/0x2e0 fs/hfsplus/bfind.c:29 stack backtrace: CPU: 0 UID: 0 PID: 5323 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_deadlock_bug+0x27a/0x290 kernel/locking/lockdep.c:3085 check_deadlock kernel/locking/lockdep.c:3137 [inline] validate_chain kernel/locking/lockdep.c:3939 [inline] __lock_acquire+0x25db/0x2de0 kernel/locking/lockdep.c:5288 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942 __mutex_lock_common kernel/locking/mutex.c:646 [inline] __mutex_lock+0x19d/0x1550 kernel/locking/mutex.c:821 hfsplus_file_extend+0x21c/0x1df0 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x170/0x590 fs/hfsplus/btree.c:512 __hfsplus_ext_write_extent+0x295/0x690 fs/hfsplus/extents.c:104 __hfsplus_ext_cache_extent+0x81/0xbd0 fs/hfsplus/extents.c:190 hfsplus_ext_read_extent fs/hfsplus/extents.c:222 [inline] hfsplus_file_extend+0x502/0x1df0 fs/hfsplus/extents.c:461 hfsplus_get_block+0x41f/0x1610 fs/hfsplus/extents.c:249 get_more_blocks fs/direct-io.c:644 [inline] do_direct_IO fs/direct-io.c:932 [inline] __blockdev_direct_IO+0x1590/0x3380 fs/direct-io.c:1236 blockdev_direct_IO include/linux/fs.h:3155 [inline] hfsplus_direct_IO+0x21f/0x370 fs/hfsplus/inode.c:174 generic_file_direct_write+0x1d0/0x3f0 mm/filemap.c:4308 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4477 generic_file_write_iter+0xae/0x330 mm/filemap.c:4517 iter_file_splice_write+0xa31/0x1240 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x101/0x160 fs/splice.c:1159 splice_direct_to_actor+0x57b/0xcb0 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x195/0x290 fs/splice.c:1228 do_sendfile+0x52e/0x7c0 fs/read_write.c:1371 __do_sys_sendfile64 fs/read_write.c:1432 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1418 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f529819e159 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:00007f5299149fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f5298425fa0 RCX: 00007f529819e159 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007f529823503b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5298426038 R14: 00007f5298425fa0 R15: 00007ffe347b69d8 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024 syz.0.0: attempt to access beyond end of device loop0: rw=34817, sector=5778, nr_sectors = 2 limit=1024