loop1: detected capacity change from 0 to 1024
======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc1-syzkaller-g2014c95afece #0 Not tainted
------------------------------------------------------
syz.1.680/9368 is trying to acquire lock:
ffff0000f0b8d8f8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_allocate+0x8c/0x728 fs/hfsplus/bitmap.c:35
but task is already holding lock:
ffff0000db6c1c08 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1d0/0x1544 fs/hfsplus/extents.c:458
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}:
__mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585
__mutex_lock kernel/locking/mutex.c:730 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782
hfsplus_get_block+0x2c4/0x1168 fs/hfsplus/extents.c:260
block_read_full_folio+0x368/0x914 fs/buffer.c:2396
hfsplus_read_folio+0x28/0x38 fs/hfsplus/inode.c:28
filemap_read_folio+0x108/0x318 mm/filemap.c:2390
do_read_cache_folio+0x368/0x5c0 mm/filemap.c:3960
do_read_cache_page mm/filemap.c:4026 [inline]
read_cache_page+0x6c/0x15c mm/filemap.c:4035
read_mapping_page include/linux/pagemap.h:1017 [inline]
hfsplus_block_allocate+0xe4/0x728 fs/hfsplus/bitmap.c:37
hfsplus_file_extend+0x7b4/0x1544 fs/hfsplus/extents.c:469
hfsplus_get_block+0x398/0x1168 fs/hfsplus/extents.c:245
__block_write_begin_int+0x4c4/0x1610 fs/buffer.c:2116
block_write_begin fs/buffer.c:2226 [inline]
cont_write_begin+0x634/0x984 fs/buffer.c:2577
hfsplus_write_begin+0x7c/0xc4 fs/hfsplus/inode.c:46
generic_perform_write+0x29c/0x868 mm/filemap.c:4189
__generic_file_write_iter+0xfc/0x204 mm/filemap.c:4290
generic_file_write_iter+0x108/0x4b0 mm/filemap.c:4316
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x704/0xa9c fs/read_write.c:679
ksys_write+0x15c/0x26c fs/read_write.c:731
__do_sys_write fs/read_write.c:742 [inline]
__se_sys_write fs/read_write.c:739 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:739
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
-> #0 (&sbi->alloc_mutex){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain kernel/locking/lockdep.c:3906 [inline]
__lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228
lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
__mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585
__mutex_lock kernel/locking/mutex.c:730 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782
hfsplus_block_allocate+0x8c/0x728 fs/hfsplus/bitmap.c:35
hfsplus_file_extend+0x7b4/0x1544 fs/hfsplus/extents.c:469
hfsplus_bmap_reserve+0xec/0x474 fs/hfsplus/btree.c:358
hfsplus_create_cat+0x18c/0x132c fs/hfsplus/catalog.c:272
hfsplus_fill_super+0xf9c/0x16f8 fs/hfsplus/super.c:561
get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636
get_tree_bdev+0x2c/0x3c fs/super.c:1659
hfsplus_get_tree+0x28/0x38 fs/hfsplus/super.c:640
vfs_get_tree+0x90/0x28c fs/super.c:1814
do_new_mount+0x278/0x900 fs/namespace.c:3560
path_mount+0x590/0xe04 fs/namespace.c:3887
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount fs/namespace.c:4088 [inline]
__arm64_sys_mount+0x4d8/0x5ac fs/namespace.c:4088
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&HFSPLUS_I(inode)->extents_lock);
lock(&sbi->alloc_mutex);
lock(&HFSPLUS_I(inode)->extents_lock);
lock(&sbi->alloc_mutex);
*** DEADLOCK ***
4 locks held by syz.1.680/9368:
#0: ffff0000eee380e0 (&type->s_umount_key#58/1){+.+.}-{4:4}, at: alloc_super+0x1b0/0x834 fs/super.c:344
#1: ffff0000f0b8d998 (&sbi->vh_mutex){+.+.}-{4:4}, at: hfsplus_fill_super+0xf40/0x16f8 fs/hfsplus/super.c:554
#2: ffff0000ca78e0b0 (&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x144/0x1bc fs/hfsplus/bfind.c:28
#3: ffff0000db6c1c08 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1d0/0x1544 fs/hfsplus/extents.c:458
stack backtrace:
CPU: 0 UID: 0 PID: 9368 Comm: syz.1.680 Not tainted 6.14.0-rc1-syzkaller-g2014c95afece #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
dump_stack+0x1c/0x28 lib/dump_stack.c:129
print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2076
check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2208
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain kernel/locking/lockdep.c:3906 [inline]
__lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228
lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
__mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585
__mutex_lock kernel/locking/mutex.c:730 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782
hfsplus_block_allocate+0x8c/0x728 fs/hfsplus/bitmap.c:35
hfsplus_file_extend+0x7b4/0x1544 fs/hfsplus/extents.c:469
hfsplus_bmap_reserve+0xec/0x474 fs/hfsplus/btree.c:358
hfsplus_create_cat+0x18c/0x132c fs/hfsplus/catalog.c:272
hfsplus_fill_super+0xf9c/0x16f8 fs/hfsplus/super.c:561
get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636
get_tree_bdev+0x2c/0x3c fs/super.c:1659
hfsplus_get_tree+0x28/0x38 fs/hfsplus/super.c:640
vfs_get_tree+0x90/0x28c fs/super.c:1814
do_new_mount+0x278/0x900 fs/namespace.c:3560
path_mount+0x590/0xe04 fs/namespace.c:3887
do_mount fs/namespace.c:3900 [inline]
__do_sys_mount fs/namespace.c:4111 [inline]
__se_sys_mount fs/namespace.c:4088 [inline]
__arm64_sys_mount+0x4d8/0x5ac fs/namespace.c:4088
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600