exFAT-fs (loop4): failed to load upcase table (idx : 0x00010000, chksum : 0x207378a5, utbl_chksum : 0xe619d30d)
======================================================
WARNING: possible circular locking dependency detected
6.1.36-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.4/12000 is trying to acquire lock:
ffff0000de0b8d48 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0x9c/0x124 mm/memory.c:5654
but task is already holding lock:
ffff00010deca0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_iterate+0x144/0x2734 fs/exfat/dir.c:228
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&sbi->s_lock){+.+.}-{3:3}:
__mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
exfat_get_block+0x164/0x17ec fs/exfat/inode.c:281
do_mpage_readpage+0x5d8/0x1748 fs/mpage.c:208
mpage_readahead+0x360/0x644 fs/mpage.c:361
exfat_readahead+0x28/0x38 fs/exfat/inode.c:344
read_pages+0x168/0x6a0 mm/readahead.c:161
page_cache_ra_unbounded+0x46c/0x58c mm/readahead.c:270
do_page_cache_ra mm/readahead.c:300 [inline]
page_cache_ra_order+0x7fc/0x994 mm/readahead.c:560
ondemand_readahead+0x5f8/0xb04 mm/readahead.c:682
page_cache_sync_ra+0x350/0x3d0 mm/readahead.c:709
page_cache_sync_readahead include/linux/pagemap.h:1213 [inline]
filemap_get_pages mm/filemap.c:2582 [inline]
filemap_read+0x598/0x2260 mm/filemap.c:2676
generic_file_read_iter+0xa0/0x450 mm/filemap.c:2822
__kernel_read+0x30c/0x6b4 fs/read_write.c:428
kernel_read+0xd8/0x1d4 fs/read_write.c:446
prepare_binprm fs/exec.c:1657 [inline]
search_binary_handler fs/exec.c:1711 [inline]
exec_binprm fs/exec.c:1768 [inline]
bprm_execve+0x764/0x162c fs/exec.c:1837
do_execveat_common+0x668/0x814 fs/exec.c:1942
do_execveat fs/exec.c:2027 [inline]
__do_sys_execveat fs/exec.c:2101 [inline]
__se_sys_execveat fs/exec.c:2095 [inline]
__arm64_sys_execveat+0xd0/0xec fs/exec.c:2095
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
-> #1 (mapping.invalidate_lock#4){.+.+}-{3:3}:
down_read+0x64/0x308 kernel/locking/rwsem.c:1520
filemap_invalidate_lock_shared include/linux/fs.h:811 [inline]
filemap_fault+0x58c/0xf7c mm/filemap.c:3128
__do_fault+0x11c/0x3d8 mm/memory.c:4212
do_read_fault mm/memory.c:4563 [inline]
do_fault mm/memory.c:4692 [inline]
handle_pte_fault mm/memory.c:4964 [inline]
__handle_mm_fault mm/memory.c:5106 [inline]
handle_mm_fault+0x1f68/0x3e9c mm/memory.c:5227
__do_page_fault arch/arm64/mm/fault.c:512 [inline]
do_page_fault+0x634/0xac4 arch/arm64/mm/fault.c:612
do_translation_fault+0x94/0xc8 arch/arm64/mm/fault.c:695
do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:831
el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367
el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427
el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:576
do_strncpy_from_user lib/strncpy_from_user.c:41 [inline]
strncpy_from_user+0x224/0x54c lib/strncpy_from_user.c:139
getname_flags+0x104/0x480 fs/namei.c:150
getname fs/namei.c:218 [inline]
__do_sys_mkdirat fs/namei.c:4076 [inline]
__se_sys_mkdirat fs/namei.c:4074 [inline]
__arm64_sys_mkdirat+0x80/0xa8 fs/namei.c:4074
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
-> #0 (&mm->mmap_lock){++++}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056
lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
__might_fault+0xc4/0x124 mm/memory.c:5655
filldir64+0x2d4/0x948 fs/readdir.c:335
dir_emit_dot include/linux/fs.h:3583 [inline]
dir_emit_dots include/linux/fs.h:3594 [inline]
exfat_iterate+0x23c/0x2734 fs/exfat/dir.c:231
iterate_dir+0x1f4/0x4e4
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64 fs/readdir.c:354 [inline]
__arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
other info that might help us debug this:
Chain exists of:
&mm->mmap_lock --> mapping.invalidate_lock#4 --> &sbi->s_lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sbi->s_lock);
lock(mapping.invalidate_lock#4);
lock(&sbi->s_lock);
lock(&mm->mmap_lock);
*** DEADLOCK ***
3 locks held by syz-executor.4/12000:
#0: ffff0000cfba94e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xd8/0x104 fs/file.c:1047
#1: ffff00010c5ba9b0 (&sb->s_type->i_mutex_key#22){++++}-{3:3}, at: iterate_dir+0x124/0x4e4 fs/readdir.c:57
#2: ffff00010deca0e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_iterate+0x144/0x2734 fs/exfat/dir.c:228
stack backtrace:
CPU: 0 PID: 12000 Comm: syz-executor.4 Not tainted 6.1.36-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call trace:
dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
__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:2056
check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x3338/0x764c kernel/locking/lockdep.c:5056
lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5669
__might_fault+0xc4/0x124 mm/memory.c:5655
filldir64+0x2d4/0x948 fs/readdir.c:335
dir_emit_dot include/linux/fs.h:3583 [inline]
dir_emit_dots include/linux/fs.h:3594 [inline]
exfat_iterate+0x23c/0x2734 fs/exfat/dir.c:231
iterate_dir+0x1f4/0x4e4
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64 fs/readdir.c:354 [inline]
__arm64_sys_getdents64+0x1c4/0x4a0 fs/readdir.c:354
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581