loop2: detected capacity change from 0 to 32768
ocfs2: Mounting device (7,2) on (node local, slot 0) with writeback data mode.
======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc5-syzkaller-00109-g0f52fd4f67c6 #0 Not tainted
------------------------------------------------------
syz.2.1683/19183 is trying to acquire lock:
ffff88805af027e0 (mapping.invalidate_lock#16){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
ffff88805af027e0 (mapping.invalidate_lock#16){.+.+}-{4:4}, at: filemap_fault+0x7f8/0x16c0 mm/filemap.c:3435
but task is already holding lock:
ffff88804932a8e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:209 [inline]
ffff88804932a8e0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/memory.c:6249 [inline]
ffff88804932a8e0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:6309
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&mm->mmap_lock){++++}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__might_fault+0xc6/0x120 mm/memory.c:6851
_inline_copy_to_user include/linux/uaccess.h:192 [inline]
_copy_to_user+0x2c/0xb0 lib/usercopy.c:26
copy_to_user include/linux/uaccess.h:225 [inline]
fiemap_fill_next_extent+0x235/0x420 fs/ioctl.c:145
ocfs2_fiemap+0xa03/0x1010 fs/ocfs2/extent_map.c:806
ioctl_fiemap fs/ioctl.c:220 [inline]
do_vfs_ioctl+0x1981/0x2770 fs/ioctl.c:840
__do_sys_ioctl fs/ioctl.c:904 [inline]
__se_sys_ioctl+0x80/0x170 fs/ioctl.c:892
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
ocfs2_read_folio+0x36a/0x980 fs/ocfs2/aops.c:294
filemap_read_folio+0x148/0x3b0 mm/filemap.c:2390
filemap_create_folio mm/filemap.c:2525 [inline]
filemap_get_pages+0x1042/0x1fb0 mm/filemap.c:2586
filemap_read+0x464/0x1260 mm/filemap.c:2691
ocfs2_file_read_iter+0x42b/0xb80 fs/ocfs2/file.c:2589
do_iter_readv_writev+0x71a/0x9d0
vfs_readv+0x2b3/0xa80 fs/read_write.c:1011
do_preadv fs/read_write.c:1125 [inline]
__do_sys_preadv fs/read_write.c:1172 [inline]
__se_sys_preadv fs/read_write.c:1167 [inline]
__x64_sys_preadv+0x1b7/0x2d0 fs/read_write.c:1167
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (mapping.invalidate_lock#16){.+.+}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3163 [inline]
check_prevs_add kernel/locking/lockdep.c:3282 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
filemap_fault+0x7f8/0x16c0 mm/filemap.c:3435
ocfs2_fault+0xbb/0x3d0 fs/ocfs2/mmap.c:38
__do_fault+0x135/0x390 mm/memory.c:4988
do_read_fault mm/memory.c:5403 [inline]
do_fault mm/memory.c:5537 [inline]
do_pte_missing mm/memory.c:4058 [inline]
handle_pte_fault mm/memory.c:5900 [inline]
__handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6043
handle_mm_fault+0x2c1/0x7e0 mm/memory.c:6212
do_user_addr_fault arch/x86/mm/fault.c:1388 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x2b9/0x8b0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
other info that might help us debug this:
Chain exists of:
mapping.invalidate_lock#16 --> &ocfs2_file_ip_alloc_sem_key --> &mm->mmap_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
rlock(&mm->mmap_lock);
lock(&ocfs2_file_ip_alloc_sem_key);
lock(&mm->mmap_lock);
rlock(mapping.invalidate_lock#16);
*** DEADLOCK ***
1 lock held by syz.2.1683/19183:
#0: ffff88804932a8e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_trylock include/linux/mmap_lock.h:209 [inline]
#0: ffff88804932a8e0 (&mm->mmap_lock){++++}-{4:4}, at: get_mmap_lock_carefully mm/memory.c:6249 [inline]
#0: ffff88804932a8e0 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x2f0 mm/memory.c:6309
stack backtrace:
CPU: 1 UID: 0 PID: 19183 Comm: syz.2.1683 Not tainted 6.14.0-rc5-syzkaller-00109-g0f52fd4f67c6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2076
check_noncircular+0x36a/0x4a0 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+0x18ef/0x5920 kernel/locking/lockdep.c:3906
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
filemap_fault+0x7f8/0x16c0 mm/filemap.c:3435
ocfs2_fault+0xbb/0x3d0 fs/ocfs2/mmap.c:38
__do_fault+0x135/0x390 mm/memory.c:4988
do_read_fault mm/memory.c:5403 [inline]
do_fault mm/memory.c:5537 [inline]
do_pte_missing mm/memory.c:4058 [inline]
handle_pte_fault mm/memory.c:5900 [inline]
__handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6043
handle_mm_fault+0x2c1/0x7e0 mm/memory.c:6212
do_user_addr_fault arch/x86/mm/fault.c:1388 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x2b9/0x8b0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f2f0224fa21
Code: 39 c6 7e 57 4c 8b 5f 20 48 8b 57 28 eb 06 0f 1f 00 4c 89 c2 49 39 d3 74 47 4c 8b 57 18 4c 8d 42 01 89 c1 83 c0 08 4c 89 47 28 <41> 0f b6 14 12 89 47 34 48 d3 e2 49 09 d1 39 f0 7c d5 44 89 ca 29
RSP: 002b:00007f2f031014e8 EFLAGS: 00010202
RAX: 0000000000000008 RBX: 00007f2f03101e28 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f2f031015e0
RBP: 00007f2f031015e0 R08: 0000000000000001 R09: 0000000000000000
R10: 00004000000011c2 R11: 000000000001f75a R12: 0000000000000005
R13: 00007f2f03101ef0 R14: 00007f2f03101eb0 R15: 00007f2ef7c00000
</TASK>