====================================================== WARNING: possible circular locking dependency detected 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 Not tainted ------------------------------------------------------ syz-executor.5/27543 is trying to acquire lock: ffff0001263200e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_get_block+0x164/0x17ec fs/exfat/inode.c:280 but task is already holding lock: ffff00012c4331d0 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] ffff00012c4331d0 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xc8/0x58c mm/readahead.c:226 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (mapping.invalidate_lock#7){.+.+}-{3:3}: down_read+0x58/0x2fc kernel/locking/rwsem.c:1520 filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] filemap_fault+0x54c/0x1154 mm/filemap.c:3277 __do_fault+0x11c/0x3d8 mm/memory.c:4176 do_read_fault mm/memory.c:4530 [inline] do_fault mm/memory.c:4659 [inline] do_pte_missing mm/memory.c:3647 [inline] handle_pte_fault mm/memory.c:4947 [inline] __handle_mm_fault mm/memory.c:5089 [inline] handle_mm_fault+0x32cc/0x48ec mm/memory.c:5243 __do_page_fault arch/arm64/mm/fault.c:523 [inline] do_page_fault+0x81c/0xcbc arch/arm64/mm/fault.c:655 do_translation_fault+0x94/0xc8 arch/arm64/mm/fault.c:741 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:877 el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:369 el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:429 el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:586 fault_in_readable+0x248/0x5e0 mm/gup.c:1856 fault_in_iov_iter_readable+0xcc/0x22c lib/iov_iter.c:362 generic_perform_write+0x1c8/0x55c mm/filemap.c:3919 __generic_file_write_iter+0x168/0x388 mm/filemap.c:4057 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4089 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x618/0x918 fs/read_write.c:584 ksys_write+0x15c/0x26c fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #1 (&mm->mmap_lock){++++}-{3:3}: __might_fault+0xc4/0x124 mm/memory.c:5732 filldir64+0x2d4/0x948 fs/readdir.c:335 dir_emit_dot include/linux/fs.h:3163 [inline] dir_emit_dots include/linux/fs.h:3174 [inline] exfat_iterate+0x23c/0x29d0 fs/exfat/dir.c:235 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+0x138/0x244 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #0 (&sbi->s_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3113 [inline] check_prevs_add kernel/locking/lockdep.c:3232 [inline] validate_chain kernel/locking/lockdep.c:3847 [inline] __lock_acquire+0x3308/0x7604 kernel/locking/lockdep.c:5088 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5705 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 exfat_get_block+0x164/0x17ec fs/exfat/inode.c:280 do_mpage_readpage+0x818/0x1974 fs/mpage.c:234 mpage_readahead+0x360/0x644 fs/mpage.c:382 exfat_readahead+0x28/0x38 fs/exfat/inode.c:343 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:1211 [inline] filemap_get_pages+0x368/0x1640 mm/filemap.c:2601 filemap_read+0x354/0xc98 mm/filemap.c:2696 generic_file_read_iter+0xa0/0x450 mm/filemap.c:2843 call_read_iter include/linux/fs.h:1862 [inline] aio_read+0x318/0x464 fs/aio.c:1564 io_submit_one+0x7e4/0x15b8 fs/aio.c:2023 __do_sys_io_submit fs/aio.c:2082 [inline] __se_sys_io_submit fs/aio.c:2052 [inline] __arm64_sys_io_submit+0x248/0x3c8 fs/aio.c:2052 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 other info that might help us debug this: Chain exists of: &sbi->s_lock --> &mm->mmap_lock --> mapping.invalidate_lock#7 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock#7); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#7); lock(&sbi->s_lock); *** DEADLOCK *** 1 lock held by syz-executor.5/27543: #0: ffff00012c4331d0 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:830 [inline] #0: ffff00012c4331d0 (mapping.invalidate_lock#7){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xc8/0x58c mm/readahead.c:226 stack backtrace: CPU: 0 PID: 27543 Comm: syz-executor.5 Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2066 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3113 [inline] check_prevs_add kernel/locking/lockdep.c:3232 [inline] validate_chain kernel/locking/lockdep.c:3847 [inline] __lock_acquire+0x3308/0x7604 kernel/locking/lockdep.c:5088 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5705 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 exfat_get_block+0x164/0x17ec fs/exfat/inode.c:280 do_mpage_readpage+0x818/0x1974 fs/mpage.c:234 mpage_readahead+0x360/0x644 fs/mpage.c:382 exfat_readahead+0x28/0x38 fs/exfat/inode.c:343 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:1211 [inline] filemap_get_pages+0x368/0x1640 mm/filemap.c:2601 filemap_read+0x354/0xc98 mm/filemap.c:2696 generic_file_read_iter+0xa0/0x450 mm/filemap.c:2843 call_read_iter include/linux/fs.h:1862 [inline] aio_read+0x318/0x464 fs/aio.c:1564 io_submit_one+0x7e4/0x15b8 fs/aio.c:2023 __do_sys_io_submit fs/aio.c:2082 [inline] __se_sys_io_submit fs/aio.c:2052 [inline] __arm64_sys_io_submit+0x248/0x3c8 fs/aio.c:2052 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 syz-executor.5: attempt to access beyond end of device loop5: rw=524288, sector=65712, nr_sectors = 3 limit=256 syz-executor.5: attempt to access beyond end of device loop5: rw=0, sector=65712, nr_sectors = 3 limit=256