bcachefs (loop3): btree_path_down(): fatal error node not found at pos 536870913:1:U32_MAX within parent node u64s 5 type btree_ptr SPOS_MAX len 0 ver 0 ====================================================== WARNING: possible circular locking dependency detected 6.14.0-rc5-syzkaller-g14d05f12084d #0 Not tainted ------------------------------------------------------ syz.3.191/7310 is trying to acquire lock: ffff0000efdc0140 (bcachefs_btree){+.+.}-{0:0}, at: trans_set_locked+0x5c/0x1a4 fs/bcachefs/btree_locking.h:197 but task is already holding lock: ffff0000dde02148 (mapping.invalidate_lock#8){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] ffff0000dde02148 (mapping.invalidate_lock#8){.+.+}-{4:4}, at: filemap_update_page mm/filemap.c:2440 [inline] ffff0000dde02148 (mapping.invalidate_lock#8){.+.+}-{4:4}, at: filemap_get_pages+0x73c/0x1cdc mm/filemap.c:2602 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #8 (mapping.invalidate_lock#8){.+.+}-{4:4}: down_read+0x58/0x2fc kernel/locking/rwsem.c:1524 filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] filemap_fault+0x524/0x1518 mm/filemap.c:3435 bch2_page_fault+0x34c/0x808 fs/bcachefs/fs-io-pagecache.c:594 __do_fault+0xf8/0x498 mm/memory.c:4988 do_read_fault mm/memory.c:5403 [inline] do_fault mm/memory.c:5537 [inline] do_pte_missing mm/memory.c:4058 [inline] handle_pte_fault+0x3504/0x57b0 mm/memory.c:5900 __handle_mm_fault mm/memory.c:6043 [inline] handle_mm_fault+0xfa8/0x188c mm/memory.c:6212 do_page_fault+0x570/0x10a8 arch/arm64/mm/fault.c:690 do_translation_fault+0xc4/0x114 arch/arm64/mm/fault.c:783 do_mem_abort+0x74/0x200 arch/arm64/mm/fault.c:919 el0_da+0x60/0x178 arch/arm64/kernel/entry-common.c:604 el0t_64_sync_handler+0xcc/0x108 arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #7 (&mm->mmap_lock){++++}-{4:4}: __might_fault+0xc4/0x124 mm/memory.c:6851 drm_mode_atomic_ioctl+0x510/0x144c drivers/gpu/drm/drm_atomic_uapi.c:1437 drm_ioctl_kernel+0x26c/0x368 drivers/gpu/drm/drm_ioctl.c:796 drm_ioctl+0x6a0/0xb98 drivers/gpu/drm/drm_ioctl.c:893 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __arm64_sys_ioctl+0x14c/0x1cc fs/ioctl.c:892 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #6 (crtc_ww_class_mutex){+.+.}-{4:4}: ww_acquire_init include/linux/ww_mutex.h:162 [inline] drm_modeset_acquire_init+0x1e4/0x384 drivers/gpu/drm/drm_modeset_lock.c:250 drmm_mode_config_init+0xb98/0x130c drivers/gpu/drm/drm_mode_config.c:462 vkms_modeset_init drivers/gpu/drm/vkms/vkms_drv.c:155 [inline] vkms_create drivers/gpu/drm/vkms/vkms_drv.c:216 [inline] vkms_init+0x2fc/0x5fc drivers/gpu/drm/vkms/vkms_drv.c:253 do_one_initcall+0x254/0xaa4 init/main.c:1257 do_initcall_level+0x154/0x214 init/main.c:1319 do_initcalls+0x84/0xf4 init/main.c:1335 do_basic_setup+0x8c/0xa0 init/main.c:1354 kernel_init_freeable+0x324/0x478 init/main.c:1568 kernel_init+0x24/0x2a0 init/main.c:1457 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #5 (crtc_ww_class_acquire){+.+.}-{0:0}: ww_acquire_init include/linux/ww_mutex.h:161 [inline] drm_modeset_acquire_init+0x1c4/0x384 drivers/gpu/drm/drm_modeset_lock.c:250 drm_client_modeset_commit_atomic+0xd8/0x724 drivers/gpu/drm/drm_client_modeset.c:1018 drm_client_modeset_commit_locked+0xd0/0x4a8 drivers/gpu/drm/drm_client_modeset.c:1182 drm_client_modeset_commit+0x50/0x7c drivers/gpu/drm/drm_client_modeset.c:1208 __drm_fb_helper_restore_fbdev_mode_unlocked+0xd4/0x178 drivers/gpu/drm/drm_fb_helper.c:237 drm_fb_helper_set_par+0xc4/0x110 drivers/gpu/drm/drm_fb_helper.c:1351 fbcon_init+0xf34/0x1eb8 drivers/video/fbdev/core/fbcon.c:1113 visual_init+0x27c/0x548 drivers/tty/vt/vt.c:1011 do_bind_con_driver+0x7dc/0xe04 drivers/tty/vt/vt.c:3831 do_take_over_console+0x4ac/0x5f0 drivers/tty/vt/vt.c:4397 do_fbcon_takeover+0x158/0x260 drivers/video/fbdev/core/fbcon.c:549 do_fb_registered drivers/video/fbdev/core/fbcon.c:2988 [inline] fbcon_fb_registered+0x370/0x4ec drivers/video/fbdev/core/fbcon.c:3008 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:449 [inline] register_framebuffer+0x470/0x610 drivers/video/fbdev/core/fbmem.c:515 __drm_fb_helper_initial_config_and_unlock+0x1334/0x1880 drivers/gpu/drm/drm_fb_helper.c:1843 drm_fb_helper_initial_config+0x48/0x64 drivers/gpu/drm/drm_fb_helper.c:1908 drm_fbdev_client_hotplug+0x158/0x22c drivers/gpu/drm/clients/drm_fbdev_client.c:52 drm_client_register+0x144/0x1e0 drivers/gpu/drm/drm_client.c:140 drm_fbdev_client_setup+0x1a4/0x39c drivers/gpu/drm/clients/drm_fbdev_client.c:159 drm_client_setup+0x78/0x140 drivers/gpu/drm/clients/drm_client_setup.c:39 vkms_create drivers/gpu/drm/vkms/vkms_drv.c:227 [inline] vkms_init+0x4ec/0x5fc drivers/gpu/drm/vkms/vkms_drv.c:253 do_one_initcall+0x254/0xaa4 init/main.c:1257 do_initcall_level+0x154/0x214 init/main.c:1319 do_initcalls+0x84/0xf4 init/main.c:1335 do_basic_setup+0x8c/0xa0 init/main.c:1354 kernel_init_freeable+0x324/0x478 init/main.c:1568 kernel_init+0x24/0x2a0 init/main.c:1457 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #4 (&client->modeset_mutex){+.+.}-{4:4}: __mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 drm_client_modeset_probe+0x300/0x3cb0 drivers/gpu/drm/drm_client_modeset.c:843 __drm_fb_helper_initial_config_and_unlock+0x100/0x1880 drivers/gpu/drm/drm_fb_helper.c:1820 drm_fb_helper_initial_config+0x48/0x64 drivers/gpu/drm/drm_fb_helper.c:1908 drm_fbdev_client_hotplug+0x158/0x22c drivers/gpu/drm/clients/drm_fbdev_client.c:52 drm_client_register+0x144/0x1e0 drivers/gpu/drm/drm_client.c:140 drm_fbdev_client_setup+0x1a4/0x39c drivers/gpu/drm/clients/drm_fbdev_client.c:159 drm_client_setup+0x78/0x140 drivers/gpu/drm/clients/drm_client_setup.c:39 vkms_create drivers/gpu/drm/vkms/vkms_drv.c:227 [inline] vkms_init+0x4ec/0x5fc drivers/gpu/drm/vkms/vkms_drv.c:253 do_one_initcall+0x254/0xaa4 init/main.c:1257 do_initcall_level+0x154/0x214 init/main.c:1319 do_initcalls+0x84/0xf4 init/main.c:1335 do_basic_setup+0x8c/0xa0 init/main.c:1354 kernel_init_freeable+0x324/0x478 init/main.c:1568 kernel_init+0x24/0x2a0 init/main.c:1457 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #3 (&helper->lock){+.+.}-{4:4}: __mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 __drm_fb_helper_restore_fbdev_mode_unlocked+0xb4/0x178 drivers/gpu/drm/drm_fb_helper.c:228 drm_fb_helper_set_par+0xc4/0x110 drivers/gpu/drm/drm_fb_helper.c:1351 fbcon_init+0xf34/0x1eb8 drivers/video/fbdev/core/fbcon.c:1113 visual_init+0x27c/0x548 drivers/tty/vt/vt.c:1011 do_bind_con_driver+0x7dc/0xe04 drivers/tty/vt/vt.c:3831 do_take_over_console+0x4ac/0x5f0 drivers/tty/vt/vt.c:4397 do_fbcon_takeover+0x158/0x260 drivers/video/fbdev/core/fbcon.c:549 do_fb_registered drivers/video/fbdev/core/fbcon.c:2988 [inline] fbcon_fb_registered+0x370/0x4ec drivers/video/fbdev/core/fbcon.c:3008 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:449 [inline] register_framebuffer+0x470/0x610 drivers/video/fbdev/core/fbmem.c:515 __drm_fb_helper_initial_config_and_unlock+0x1334/0x1880 drivers/gpu/drm/drm_fb_helper.c:1843 drm_fb_helper_initial_config+0x48/0x64 drivers/gpu/drm/drm_fb_helper.c:1908 drm_fbdev_client_hotplug+0x158/0x22c drivers/gpu/drm/clients/drm_fbdev_client.c:52 drm_client_register+0x144/0x1e0 drivers/gpu/drm/drm_client.c:140 drm_fbdev_client_setup+0x1a4/0x39c drivers/gpu/drm/clients/drm_fbdev_client.c:159 drm_client_setup+0x78/0x140 drivers/gpu/drm/clients/drm_client_setup.c:39 vkms_create drivers/gpu/drm/vkms/vkms_drv.c:227 [inline] vkms_init+0x4ec/0x5fc drivers/gpu/drm/vkms/vkms_drv.c:253 do_one_initcall+0x254/0xaa4 init/main.c:1257 do_initcall_level+0x154/0x214 init/main.c:1319 do_initcalls+0x84/0xf4 init/main.c:1335 do_basic_setup+0x8c/0xa0 init/main.c:1354 kernel_init_freeable+0x324/0x478 init/main.c:1568 kernel_init+0x24/0x2a0 init/main.c:1457 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 -> #2 (console_lock){+.+.}-{0:0}: console_lock+0x19c/0x1f4 kernel/printk/printk.c:2833 __bch2_print_string_as_lines fs/bcachefs/util.c:267 [inline] bch2_print_string_as_lines+0x2c/0xd4 fs/bcachefs/util.c:286 __bch2_fsck_err+0xdd0/0x122c fs/bcachefs/error.c:426 __btree_err+0x5c4/0x6cc fs/bcachefs/btree_io.c:581 validate_bset_keys+0xd24/0x1680 fs/bcachefs/btree_io.c:962 bch2_btree_node_read_done+0x19f4/0x4acc fs/bcachefs/btree_io.c:1164 btree_node_read_work+0x534/0xf20 fs/bcachefs/btree_io.c:1358 bch2_btree_node_read+0x1da0/0x2480 fs/bcachefs/btree_io.c:1748 __bch2_btree_root_read fs/bcachefs/btree_io.c:1789 [inline] bch2_btree_root_read+0x2c0/0x41c fs/bcachefs/btree_io.c:1811 read_btree_roots+0x2e0/0x88c fs/bcachefs/recovery.c:581 bch2_fs_recovery+0x2094/0x32ec fs/bcachefs/recovery.c:928 bch2_fs_start+0x32c/0x570 fs/bcachefs/super.c:1041 bch2_fs_get_tree+0xa50/0x11d4 fs/bcachefs/fs.c:2203 vfs_get_tree+0x90/0x28c fs/super.c:1814 do_new_mount+0x278/0x900 fs/namespace.c:3560 path_mount+0x590/0xe04 fs/namespace.c:3887 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount fs/namespace.c:4088 [inline] __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4088 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #1 (&c->fsck_error_msgs_lock){+.+.}-{4:4}: __mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585 __mutex_lock kernel/locking/mutex.c:730 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782 __bch2_fsck_err+0x340/0x122c fs/bcachefs/error.c:309 bch2_btree_repair_topology_recurse+0xc2c/0x43c4 fs/bcachefs/btree_gc.c:351 bch2_check_topology+0x5b8/0x878 fs/bcachefs/btree_gc.c:554 bch2_run_recovery_pass+0xe4/0x1d4 fs/bcachefs/recovery_passes.c:226 bch2_run_recovery_passes+0x260/0x92c fs/bcachefs/recovery_passes.c:291 bch2_fs_recovery+0x20e0/0x32ec fs/bcachefs/recovery.c:936 bch2_fs_start+0x32c/0x570 fs/bcachefs/super.c:1041 bch2_fs_get_tree+0xa50/0x11d4 fs/bcachefs/fs.c:2203 vfs_get_tree+0x90/0x28c fs/super.c:1814 do_new_mount+0x278/0x900 fs/namespace.c:3560 path_mount+0x590/0xe04 fs/namespace.c:3887 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount fs/namespace.c:4088 [inline] __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4088 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (bcachefs_btree){+.+.}-{0:0}: check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain kernel/locking/lockdep.c:3906 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851 trans_set_locked+0x88/0x1a4 fs/bcachefs/btree_locking.h:198 bch2_trans_begin+0x6fc/0x980 fs/bcachefs/btree_iter.c:3305 bch2_inum_err_msg_trans+0x78/0x1c0 fs/bcachefs/error.c:540 bch2_inum_offset_err_msg_trans+0x44/0x78 fs/bcachefs/error.c:550 bchfs_read+0x1ab4/0x1dc0 fs/bcachefs/fs-io-buffered.c:235 bch2_read_single_folio+0x460/0x67c fs/bcachefs/fs-io-buffered.c:335 bch2_read_folio+0x40/0x88 fs/bcachefs/fs-io-buffered.c:353 filemap_read_folio+0x108/0x318 mm/filemap.c:2390 filemap_update_page mm/filemap.c:2474 [inline] filemap_get_pages+0x1340/0x1cdc mm/filemap.c:2602 filemap_read+0x360/0xe94 mm/filemap.c:2691 bch2_read_iter+0x284/0x1178 fs/bcachefs/fs-io-direct.c:213 new_sync_read fs/read_write.c:484 [inline] vfs_read+0x698/0x974 fs/read_write.c:565 ksys_read+0x15c/0x26c fs/read_write.c:708 __do_sys_read fs/read_write.c:717 [inline] __se_sys_read fs/read_write.c:715 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:715 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Chain exists of: bcachefs_btree --> &mm->mmap_lock --> mapping.invalidate_lock#8 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(mapping.invalidate_lock#8); lock(&mm->mmap_lock); lock(mapping.invalidate_lock#8); lock(bcachefs_btree); *** DEADLOCK *** 2 locks held by syz.3.191/7310: #0: ffff0000d7309438 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x220/0x2ac fs/file.c:1192 #1: ffff0000dde02148 (mapping.invalidate_lock#8){.+.+}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline] #1: ffff0000dde02148 (mapping.invalidate_lock#8){.+.+}-{4:4}, at: filemap_update_page mm/filemap.c:2440 [inline] #1: ffff0000dde02148 (mapping.invalidate_lock#8){.+.+}-{4:4}, at: filemap_get_pages+0x73c/0x1cdc mm/filemap.c:2602 stack backtrace: CPU: 0 UID: 0 PID: 7310 Comm: syz.3.191 Not tainted 6.14.0-rc5-syzkaller-g14d05f12084d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2076 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2208 check_prev_add kernel/locking/lockdep.c:3163 [inline] check_prevs_add kernel/locking/lockdep.c:3282 [inline] validate_chain kernel/locking/lockdep.c:3906 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851 trans_set_locked+0x88/0x1a4 fs/bcachefs/btree_locking.h:198 bch2_trans_begin+0x6fc/0x980 fs/bcachefs/btree_iter.c:3305 bch2_inum_err_msg_trans+0x78/0x1c0 fs/bcachefs/error.c:540 bch2_inum_offset_err_msg_trans+0x44/0x78 fs/bcachefs/error.c:550 bchfs_read+0x1ab4/0x1dc0 fs/bcachefs/fs-io-buffered.c:235 bch2_read_single_folio+0x460/0x67c fs/bcachefs/fs-io-buffered.c:335 bch2_read_folio+0x40/0x88 fs/bcachefs/fs-io-buffered.c:353 filemap_read_folio+0x108/0x318 mm/filemap.c:2390 filemap_update_page mm/filemap.c:2474 [inline] filemap_get_pages+0x1340/0x1cdc mm/filemap.c:2602 filemap_read+0x360/0xe94 mm/filemap.c:2691 bch2_read_iter+0x284/0x1178 fs/bcachefs/fs-io-direct.c:213 new_sync_read fs/read_write.c:484 [inline] vfs_read+0x698/0x974 fs/read_write.c:565 ksys_read+0x15c/0x26c fs/read_write.c:708 __do_sys_read fs/read_write.c:717 [inline] __se_sys_read fs/read_write.c:715 [inline] __arm64_sys_read+0x7c/0x90 fs/read_write.c:715 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 bcachefs (loop3): /file3 offset 0: read error -2302 from btree lookup