loop6: detected capacity change from 0 to 512 EXT4-fs (loop6): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. process 'syz.6.3809' launched './file1' with NULL argv: empty string added ====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc5-syzkaller-00012-g0bc21e701a6f #0 Not tainted ------------------------------------------------------ syz.6.3809/17259 is trying to acquire lock: ffff88807ceec620 (&ei->xattr_sem){++++}-{4:4}, at: ext4_readpage_inline+0x33/0x610 fs/ext4/inline.c:518 but task is already holding lock: ffff88807ceecaf0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:873 [inline] ffff88807ceecaf0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_create_folio mm/filemap.c:2488 [inline] ffff88807ceecaf0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_get_pages+0xf3b/0x1be0 mm/filemap.c:2555 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (mapping.invalidate_lock){++++}-{4:4}: down_read+0x9a/0x330 kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:873 [inline] page_cache_ra_unbounded+0x173/0x750 mm/readahead.c:226 do_page_cache_ra mm/readahead.c:325 [inline] page_cache_ra_order+0x8f2/0xc80 mm/readahead.c:524 page_cache_async_ra+0x5cb/0x820 mm/readahead.c:674 do_async_mmap_readahead mm/filemap.c:3231 [inline] filemap_fault+0xd69/0x2820 mm/filemap.c:3330 __do_fault+0x10d/0x490 mm/memory.c:4907 do_read_fault mm/memory.c:5322 [inline] do_fault mm/memory.c:5456 [inline] do_pte_missing+0xebd/0x3e00 mm/memory.c:3979 handle_pte_fault mm/memory.c:5801 [inline] __handle_mm_fault+0x103c/0x2a40 mm/memory.c:5944 handle_mm_fault+0x3fa/0xaa0 mm/memory.c:6112 faultin_page mm/gup.c:1196 [inline] __get_user_pages+0x8d9/0x3b50 mm/gup.c:1494 __get_user_pages_locked mm/gup.c:1760 [inline] get_dump_page+0xff/0x230 mm/gup.c:2278 dump_user_range+0x135/0x8c0 fs/coredump.c:943 elf_core_dump+0x287c/0x3a50 fs/binfmt_elf.c:2129 do_coredump+0x3ada/0x49e0 fs/coredump.c:758 get_signal+0x230b/0x26c0 kernel/signal.c:3002 arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop kernel/entry/common.c:111 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline] irqentry_exit_to_user_mode+0x13f/0x280 kernel/entry/common.c:231 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 -> #5 (&mm->mmap_lock){++++}-{4:4}: __might_fault mm/memory.c:6751 [inline] __might_fault+0x11b/0x190 mm/memory.c:6744 _inline_copy_from_user include/linux/uaccess.h:162 [inline] _copy_from_user+0x29/0xd0 lib/usercopy.c:18 copy_from_user include/linux/uaccess.h:212 [inline] __blk_trace_setup+0xa8/0x180 kernel/trace/blktrace.c:626 blk_trace_ioctl+0x163/0x290 kernel/trace/blktrace.c:740 blkdev_ioctl+0x109/0x6d0 block/ioctl.c:682 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #4 (&q->debugfs_mutex){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 blk_mq_init_sched+0x42b/0x640 block/blk-mq-sched.c:473 elevator_init_mq+0x2cd/0x420 block/elevator.c:610 add_disk_fwnode+0x113/0x1300 block/genhd.c:413 sd_probe+0xa86/0x1000 drivers/scsi/sd.c:4024 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x15a/0x1e0 drivers/base/bus.c:459 __device_attach_async_helper+0x1d3/0x290 drivers/base/dd.c:987 async_run_entry_fn+0x9f/0x530 kernel/async.c:129 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #3 (&q->q_usage_counter(queue)#50){++++}-{0:0}: blk_queue_enter+0x50f/0x640 block/blk-core.c:328 blk_mq_alloc_request+0x59b/0x950 block/blk-mq.c:652 scsi_alloc_request drivers/scsi/scsi_lib.c:1222 [inline] scsi_execute_cmd+0x1eb/0xf40 drivers/scsi/scsi_lib.c:304 read_capacity_16+0x213/0xe10 drivers/scsi/sd.c:2655 sd_read_capacity drivers/scsi/sd.c:2824 [inline] sd_revalidate_disk.isra.0+0x1a06/0xa8d0 drivers/scsi/sd.c:3734 sd_probe+0x904/0x1000 drivers/scsi/sd.c:4010 call_driver_probe drivers/base/dd.c:579 [inline] really_probe+0x241/0xa90 drivers/base/dd.c:658 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:800 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:830 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:958 bus_for_each_drv+0x15a/0x1e0 drivers/base/bus.c:459 __device_attach_async_helper+0x1d3/0x290 drivers/base/dd.c:987 async_run_entry_fn+0x9f/0x530 kernel/async.c:129 process_one_work+0x9c8/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c4/0x3a0 kernel/kthread.c:389 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #2 (&q->limits_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/mutex.c:585 [inline] __mutex_lock+0x19b/0xa60 kernel/locking/mutex.c:735 queue_limits_start_update include/linux/blkdev.h:947 [inline] loop_reconfigure_limits+0x407/0x8c0 drivers/block/loop.c:998 loop_set_block_size drivers/block/loop.c:1473 [inline] lo_simple_ioctl drivers/block/loop.c:1496 [inline] lo_ioctl+0x901/0x18b0 drivers/block/loop.c:1559 blkdev_ioctl+0x279/0x6d0 block/ioctl.c:693 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&q->q_usage_counter(io)#23){++++}-{0:0}: bio_queue_enter block/blk.h:75 [inline] blk_mq_submit_bio+0x1fb6/0x24c0 block/blk-mq.c:3090 __submit_bio+0x384/0x540 block/blk-core.c:629 __submit_bio_noacct_mq block/blk-core.c:710 [inline] submit_bio_noacct_nocheck+0x698/0xd70 block/blk-core.c:739 submit_bio_noacct+0x93a/0x1e20 block/blk-core.c:868 __ext4_read_bh fs/ext4/super.c:181 [inline] ext4_read_bh_nowait+0x199/0x250 fs/ext4/super.c:193 ext4_sb_breadahead_unmovable+0xb1/0xf0 fs/ext4/super.c:276 __ext4_get_inode_loc+0x1084/0x15c0 fs/ext4/inode.c:4523 ext4_get_inode_loc+0xbe/0x160 fs/ext4/inode.c:4568 ext4_reserve_inode_write+0xcb/0x270 fs/ext4/inode.c:5827 __ext4_mark_inode_dirty+0x1ab/0x860 fs/ext4/inode.c:6004 __ext4_new_inode+0x411b/0x4f20 fs/ext4/ialloc.c:1333 ext4_xattr_inode_create fs/ext4/xattr.c:1486 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1596 [inline] ext4_xattr_inode_lookup_create+0xaf8/0x1aa0 fs/ext4/xattr.c:1574 ext4_xattr_ibody_set+0x1d9/0x5b0 fs/ext4/xattr.c:2269 ext4_xattr_set_handle+0x939/0x1420 fs/ext4/xattr.c:2446 __ext4_set_acl+0x372/0x5e0 fs/ext4/acl.c:217 ext4_set_acl+0x402/0x5a0 fs/ext4/acl.c:259 set_posix_acl+0x25f/0x320 fs/posix_acl.c:954 vfs_set_acl+0x5a7/0x930 fs/posix_acl.c:1133 do_set_acl+0xd9/0x1a0 fs/posix_acl.c:1278 do_setxattr+0xe7/0x170 fs/xattr.c:633 filename_setxattr+0x16d/0x1d0 fs/xattr.c:665 path_setxattrat+0x1e0/0x290 fs/xattr.c:713 __do_sys_lsetxattr fs/xattr.c:754 [inline] __se_sys_lsetxattr fs/xattr.c:750 [inline] __x64_sys_lsetxattr+0xc9/0x140 fs/xattr.c:750 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ei->xattr_sem){++++}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 down_read+0x9a/0x330 kernel/locking/rwsem.c:1524 ext4_readpage_inline+0x33/0x610 fs/ext4/inline.c:518 ext4_read_folio+0x192/0x380 fs/ext4/inode.c:3185 filemap_read_folio+0xc9/0x2a0 mm/filemap.c:2366 filemap_create_folio mm/filemap.c:2497 [inline] filemap_get_pages+0x100b/0x1be0 mm/filemap.c:2555 filemap_read+0x3ca/0xd70 mm/filemap.c:2646 generic_file_read_iter+0x344/0x450 mm/filemap.c:2834 ext4_file_read_iter+0x1d6/0x6a0 fs/ext4/file.c:147 __kernel_read+0x3f4/0xb50 fs/read_write.c:523 kernel_read+0x55/0x70 fs/read_write.c:541 prepare_binprm fs/exec.c:1683 [inline] search_binary_handler fs/exec.c:1732 [inline] exec_binprm fs/exec.c:1790 [inline] bprm_execve fs/exec.c:1842 [inline] bprm_execve+0x61e/0x19b0 fs/exec.c:1818 do_execveat_common.isra.0+0x4f1/0x630 fs/exec.c:1949 do_execveat fs/exec.c:2034 [inline] __do_sys_execveat fs/exec.c:2108 [inline] __se_sys_execveat fs/exec.c:2102 [inline] __x64_sys_execveat+0xda/0x120 fs/exec.c:2102 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: &ei->xattr_sem --> &mm->mmap_lock --> mapping.invalidate_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock); lock(&mm->mmap_lock); lock(mapping.invalidate_lock); rlock(&ei->xattr_sem); *** DEADLOCK *** 2 locks held by syz.6.3809/17259: #0: ffff88802eb25d08 (&sig->cred_guard_mutex){+.+.}-{4:4}, at: prepare_bprm_creds fs/exec.c:1458 [inline] #0: ffff88802eb25d08 (&sig->cred_guard_mutex){+.+.}-{4:4}, at: bprm_execve+0xa5/0x19b0 fs/exec.c:1822 #1: ffff88807ceecaf0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:873 [inline] #1: ffff88807ceecaf0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_create_folio mm/filemap.c:2488 [inline] #1: ffff88807ceecaf0 (mapping.invalidate_lock){++++}-{4:4}, at: filemap_get_pages+0xf3b/0x1be0 mm/filemap.c:2555 stack backtrace: CPU: 1 UID: 0 PID: 17259 Comm: syz.6.3809 Not tainted 6.13.0-rc5-syzkaller-00012-g0bc21e701a6f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x419/0x5d0 kernel/locking/lockdep.c:2074 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x249e/0x3c40 kernel/locking/lockdep.c:5226 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5849 down_read+0x9a/0x330 kernel/locking/rwsem.c:1524 ext4_readpage_inline+0x33/0x610 fs/ext4/inline.c:518 ext4_read_folio+0x192/0x380 fs/ext4/inode.c:3185 filemap_read_folio+0xc9/0x2a0 mm/filemap.c:2366 filemap_create_folio mm/filemap.c:2497 [inline] filemap_get_pages+0x100b/0x1be0 mm/filemap.c:2555 filemap_read+0x3ca/0xd70 mm/filemap.c:2646 generic_file_read_iter+0x344/0x450 mm/filemap.c:2834 ext4_file_read_iter+0x1d6/0x6a0 fs/ext4/file.c:147 __kernel_read+0x3f4/0xb50 fs/read_write.c:523 kernel_read+0x55/0x70 fs/read_write.c:541 prepare_binprm fs/exec.c:1683 [inline] search_binary_handler fs/exec.c:1732 [inline] exec_binprm fs/exec.c:1790 [inline] bprm_execve fs/exec.c:1842 [inline] bprm_execve+0x61e/0x19b0 fs/exec.c:1818 do_execveat_common.isra.0+0x4f1/0x630 fs/exec.c:1949 do_execveat fs/exec.c:2034 [inline] __do_sys_execveat fs/exec.c:2108 [inline] __se_sys_execveat fs/exec.c:2102 [inline] __x64_sys_execveat+0xda/0x120 fs/exec.c:2102 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2289d85d29 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:00007f228ab19038 EFLAGS: 00000246 ORIG_RAX: 0000000000000142 RAX: ffffffffffffffda RBX: 00007f2289f75fa0 RCX: 00007f2289d85d29 RDX: 0000000000000000 RSI: 0000000020000140 RDI: ffffffffffffff9c RBP: 00007f2289e01b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2289f75fa0 R15: 00007ffebdf38f28