======================================================
WARNING: possible circular locking dependency detected
5.15.125-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.4/7716 is trying to acquire lock:
ffff0000cbbd20e0 (&sbi->s_lock#3){+.+.}-{3:3}, at: exfat_get_block+0x16c/0x1b40 fs/exfat/inode.c:303
but task is already holding lock:
ffff00010d7fcbd0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline]
ffff00010d7fcbd0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline]
ffff00010d7fcbd0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline]
ffff00010d7fcbd0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_read+0x814/0x1bd4 mm/filemap.c:2634
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (mapping.invalidate_lock#4){.+.+}-{3:3}:
down_read+0xc0/0x398 kernel/locking/rwsem.c:1488
filemap_invalidate_lock_shared include/linux/fs.h:842 [inline]
filemap_fault+0x52c/0xf5c mm/filemap.c:3072
__do_fault+0x120/0x5d0 mm/memory.c:3898
do_read_fault mm/memory.c:4234 [inline]
do_fault mm/memory.c:4362 [inline]
handle_pte_fault mm/memory.c:4621 [inline]
__handle_mm_fault mm/memory.c:4756 [inline]
handle_mm_fault+0x21ec/0x33c4 mm/memory.c:4854
__do_page_fault arch/arm64/mm/fault.c:505 [inline]
do_page_fault+0x700/0xb60 arch/arm64/mm/fault.c:605
do_translation_fault+0xe8/0x138 arch/arm64/mm/fault.c:686
do_mem_abort+0x70/0x1d8 arch/arm64/mm/fault.c:819
el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:358
el1h_64_sync_handler+0x5c/0x98 arch/arm64/kernel/entry-common.c:409
el1h_64_sync+0x78/0x7c arch/arm64/kernel/entry.S:579
do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
strncpy_from_user+0x240/0x580 lib/strncpy_from_user.c:139
getname_flags+0x104/0x480 fs/namei.c:149
getname fs/namei.c:217 [inline]
__do_sys_mkdirat fs/namei.c:4034 [inline]
__se_sys_mkdirat fs/namei.c:4032 [inline]
__arm64_sys_mkdirat+0x80/0xa8 fs/namei.c:4032
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #1 (&mm->mmap_lock){++++}-{3:3}:
__might_fault+0xc8/0x128 mm/memory.c:5324
filldir64+0x2bc/0x9e4 fs/readdir.c:335
dir_emit_dot include/linux/fs.h:3605 [inline]
dir_emit_dots include/linux/fs.h:3616 [inline]
exfat_iterate+0x25c/0x27a0 fs/exfat/dir.c:232
iterate_dir+0x1f4/0x4e4
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64 fs/readdir.c:354 [inline]
__arm64_sys_getdents64+0x1c4/0x4c4 fs/readdir.c:354
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #0 (&sbi->s_lock#3){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3787 [inline]
__lock_acquire+0x32cc/0x7620 kernel/locking/lockdep.c:5011
lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
__mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
exfat_get_block+0x16c/0x1b40 fs/exfat/inode.c:303
block_read_full_page+0x2a0/0xc4c fs/buffer.c:2290
do_mpage_readpage+0x1794/0x1c68 fs/mpage.c:332
mpage_readpage+0xec/0x1e0 fs/mpage.c:408
exfat_readpage+0x28/0x38 fs/exfat/inode.c:361
filemap_read_page+0x150/0x454 mm/filemap.c:2386
filemap_update_page mm/filemap.c:2464 [inline]
filemap_get_pages mm/filemap.c:2574 [inline]
filemap_read+0xe3c/0x1bd4 mm/filemap.c:2634
generic_file_read_iter+0xa0/0x3c4 mm/filemap.c:2785
call_read_iter include/linux/fs.h:2097 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0x86c/0xb10 fs/read_write.c:485
ksys_read+0x15c/0x26c fs/read_write.c:623
__do_sys_read fs/read_write.c:633 [inline]
__se_sys_read fs/read_write.c:631 [inline]
__arm64_sys_read+0x7c/0x90 fs/read_write.c:631
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
other info that might help us debug this:
Chain exists of:
&sbi->s_lock#3 --> &mm->mmap_lock --> mapping.invalidate_lock#4
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(mapping.invalidate_lock#4);
lock(&mm->mmap_lock);
lock(mapping.invalidate_lock#4);
lock(&sbi->s_lock#3);
*** DEADLOCK ***
2 locks held by syz-executor.4/7716:
#0: ffff0000daa50370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xa0/0xcc fs/file.c:1072
#1: ffff00010d7fcbd0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:842 [inline]
#1: ffff00010d7fcbd0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_update_page mm/filemap.c:2435 [inline]
#1: ffff00010d7fcbd0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_get_pages mm/filemap.c:2574 [inline]
#1: ffff00010d7fcbd0 (mapping.invalidate_lock#4){.+.+}-{3:3}, at: filemap_read+0x814/0x1bd4 mm/filemap.c:2634
stack backtrace:
CPU: 0 PID: 7716 Comm: syz-executor.4 Not tainted 5.15.125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call trace:
dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
dump_stack+0x1c/0x58 lib/dump_stack.c:113
print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011
check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3787 [inline]
__lock_acquire+0x32cc/0x7620 kernel/locking/lockdep.c:5011
lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622
__mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
exfat_get_block+0x16c/0x1b40 fs/exfat/inode.c:303
block_read_full_page+0x2a0/0xc4c fs/buffer.c:2290
do_mpage_readpage+0x1794/0x1c68 fs/mpage.c:332
mpage_readpage+0xec/0x1e0 fs/mpage.c:408
exfat_readpage+0x28/0x38 fs/exfat/inode.c:361
filemap_read_page+0x150/0x454 mm/filemap.c:2386
filemap_update_page mm/filemap.c:2464 [inline]
filemap_get_pages mm/filemap.c:2574 [inline]
filemap_read+0xe3c/0x1bd4 mm/filemap.c:2634
generic_file_read_iter+0xa0/0x3c4 mm/filemap.c:2785
call_read_iter include/linux/fs.h:2097 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0x86c/0xb10 fs/read_write.c:485
ksys_read+0x15c/0x26c fs/read_write.c:623
__do_sys_read fs/read_write.c:633 [inline]
__se_sys_read fs/read_write.c:631 [inline]
__arm64_sys_read+0x7c/0x90 fs/read_write.c:631
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584