======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc4-syzkaller-00013-g66701750d556 #0 Not tainted
------------------------------------------------------
syz.3.104/6783 is trying to acquire lock:
ffff888053e5e0e0 (mapping.invalidate_lock#8){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
ffff888053e5e0e0 (mapping.invalidate_lock#8){.+.+}-{4:4}, at: page_cache_ra_unbounded+0x129/0x7b0 mm/readahead.c:228
but task is already holding lock:
ffff8880227a7560 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable include/linux/mmap_lock.h:421 [inline]
ffff8880227a7560 (&mm->mmap_lock){++++}-{4:4}, at: __get_user_pages_locked mm/gup.c:1809 [inline]
ffff8880227a7560 (&mm->mmap_lock){++++}-{4:4}, at: __gup_longterm_locked+0x1005/0x15b0 mm/gup.c:2512
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&mm->mmap_lock){++++}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
__might_fault+0xcc/0x130 mm/memory.c:6971
_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+0x1c0/0x390 fs/ioctl.c:145
ocfs2_fiemap+0x888/0xc90 fs/ocfs2/extent_map.c:806
ioctl_fiemap fs/ioctl.c:220 [inline]
do_vfs_ioctl+0x16d3/0x1990 fs/ioctl.c:841
__do_sys_ioctl fs/ioctl.c:905 [inline]
__se_sys_ioctl+0x82/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&oi->ip_alloc_sem){++++}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524
ocfs2_read_folio+0x353/0x970 fs/ocfs2/aops.c:287
filemap_read_folio+0x117/0x380 mm/filemap.c:2412
filemap_fault+0xb16/0x1200 mm/filemap.c:3504
ocfs2_fault+0xa4/0x3f0 fs/ocfs2/mmap.c:38
__do_fault+0x135/0x390 mm/memory.c:5169
do_shared_fault mm/memory.c:5654 [inline]
do_fault mm/memory.c:5728 [inline]
do_pte_missing mm/memory.c:4251 [inline]
handle_pte_fault mm/memory.c:6069 [inline]
__handle_mm_fault+0x198b/0x5620 mm/memory.c:6212
handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6381
faultin_page mm/gup.c:1186 [inline]
__get_user_pages+0x1af4/0x30b0 mm/gup.c:1488
__get_user_pages_locked mm/gup.c:1754 [inline]
__gup_longterm_locked+0xd66/0x15b0 mm/gup.c:2512
gup_fast_fallback+0x1cd4/0x2260 mm/gup.c:3363
iov_iter_extract_user_pages lib/iov_iter.c:1846 [inline]
iov_iter_extract_pages+0x35a/0x5e0 lib/iov_iter.c:1909
dio_refill_pages fs/direct-io.c:172 [inline]
dio_get_page fs/direct-io.c:213 [inline]
do_direct_IO fs/direct-io.c:915 [inline]
__blockdev_direct_IO+0x114f/0x33d0 fs/direct-io.c:1243
ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2438
generic_file_read_iter+0x31c/0x510 mm/filemap.c:2880
ocfs2_file_read_iter+0x3fa/0xa80 fs/ocfs2/file.c:2589
new_sync_read fs/read_write.c:491 [inline]
vfs_read+0x4cd/0x980 fs/read_write.c:572
ksys_read+0x145/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (mapping.invalidate_lock#8){.+.+}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911
__lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
page_cache_ra_unbounded+0x129/0x7b0 mm/readahead.c:228
do_sync_mmap_readahead+0x4b5/0x5f0 mm/filemap.c:3271
filemap_fault+0x62a/0x1200 mm/filemap.c:3412
ocfs2_fault+0xa4/0x3f0 fs/ocfs2/mmap.c:38
__do_fault+0x135/0x390 mm/memory.c:5169
do_shared_fault mm/memory.c:5654 [inline]
do_fault mm/memory.c:5728 [inline]
do_pte_missing mm/memory.c:4251 [inline]
handle_pte_fault mm/memory.c:6069 [inline]
__handle_mm_fault+0x198b/0x5620 mm/memory.c:6212
handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6381
faultin_page mm/gup.c:1186 [inline]
__get_user_pages+0x1af4/0x30b0 mm/gup.c:1488
__get_user_pages_locked mm/gup.c:1818 [inline]
__gup_longterm_locked+0x105d/0x15b0 mm/gup.c:2512
gup_fast_fallback+0x1cd4/0x2260 mm/gup.c:3363
iov_iter_extract_user_pages lib/iov_iter.c:1846 [inline]
iov_iter_extract_pages+0x35a/0x5e0 lib/iov_iter.c:1909
dio_refill_pages fs/direct-io.c:172 [inline]
dio_get_page fs/direct-io.c:213 [inline]
do_direct_IO fs/direct-io.c:915 [inline]
__blockdev_direct_IO+0x114f/0x33d0 fs/direct-io.c:1243
ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2438
generic_file_read_iter+0x31c/0x510 mm/filemap.c:2880
ocfs2_file_read_iter+0x3fa/0xa80 fs/ocfs2/file.c:2589
new_sync_read fs/read_write.c:491 [inline]
vfs_read+0x4cd/0x980 fs/read_write.c:572
ksys_read+0x145/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
mapping.invalidate_lock#8 --> &oi->ip_alloc_sem --> &mm->mmap_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
rlock(&mm->mmap_lock);
lock(&oi->ip_alloc_sem);
lock(&mm->mmap_lock);
rlock(mapping.invalidate_lock#8);
*** DEADLOCK ***
2 locks held by syz.3.104/6783:
#0: ffff8880344db5f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 fs/file.c:1217
#1: ffff8880227a7560 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_killable include/linux/mmap_lock.h:421 [inline]
#1: ffff8880227a7560 (&mm->mmap_lock){++++}-{4:4}, at: __get_user_pages_locked mm/gup.c:1809 [inline]
#1: ffff8880227a7560 (&mm->mmap_lock){++++}-{4:4}, at: __gup_longterm_locked+0x1005/0x15b0 mm/gup.c:2512
stack backtrace:
CPU: 0 UID: 0 PID: 6783 Comm: syz.3.104 Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2046
check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911
__lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524
filemap_invalidate_lock_shared include/linux/fs.h:934 [inline]
page_cache_ra_unbounded+0x129/0x7b0 mm/readahead.c:228
do_sync_mmap_readahead+0x4b5/0x5f0 mm/filemap.c:3271
filemap_fault+0x62a/0x1200 mm/filemap.c:3412
ocfs2_fault+0xa4/0x3f0 fs/ocfs2/mmap.c:38
__do_fault+0x135/0x390 mm/memory.c:5169
do_shared_fault mm/memory.c:5654 [inline]
do_fault mm/memory.c:5728 [inline]
do_pte_missing mm/memory.c:4251 [inline]
handle_pte_fault mm/memory.c:6069 [inline]
__handle_mm_fault+0x198b/0x5620 mm/memory.c:6212
handle_mm_fault+0x2d5/0x7f0 mm/memory.c:6381
faultin_page mm/gup.c:1186 [inline]
__get_user_pages+0x1af4/0x30b0 mm/gup.c:1488
__get_user_pages_locked mm/gup.c:1818 [inline]
__gup_longterm_locked+0x105d/0x15b0 mm/gup.c:2512
gup_fast_fallback+0x1cd4/0x2260 mm/gup.c:3363
iov_iter_extract_user_pages lib/iov_iter.c:1846 [inline]
iov_iter_extract_pages+0x35a/0x5e0 lib/iov_iter.c:1909
dio_refill_pages fs/direct-io.c:172 [inline]
dio_get_page fs/direct-io.c:213 [inline]
do_direct_IO fs/direct-io.c:915 [inline]
__blockdev_direct_IO+0x114f/0x33d0 fs/direct-io.c:1243
ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2438
generic_file_read_iter+0x31c/0x510 mm/filemap.c:2880
ocfs2_file_read_iter+0x3fa/0xa80 fs/ocfs2/file.c:2589
new_sync_read fs/read_write.c:491 [inline]
vfs_read+0x4cd/0x980 fs/read_write.c:572
ksys_read+0x145/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe68598e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe6867aa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fe685bb6080 RCX: 00007fe68598e929
RDX: 0000000000001000 RSI: 0000200000001400 RDI: 0000000000000004
RBP: 00007fe685a10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fe685bb6080 R15: 00007ffc7777d898
</TASK>