ubi0: attaching mtd0 ubi0: scanning is finished ================================================================== BUG: KASAN: slab-out-of-bounds in notifier_chain_register+0x108/0x4e0 kernel/notifier.c:27 Read of size 4 at addr ffff0000d3cc98e8 by task syz.1.186/7459 CPU: 1 UID: 0 PID: 7459 Comm: syz.1.186 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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 print_address_description mm/kasan/report.c:378 [inline] print_report+0x198/0x538 mm/kasan/report.c:489 kasan_report+0xd8/0x138 mm/kasan/report.c:602 __asan_report_load4_noabort+0x20/0x2c mm/kasan/report_generic.c:380 notifier_chain_register+0x108/0x4e0 kernel/notifier.c:27 __blocking_notifier_chain_register kernel/notifier.c:264 [inline] blocking_notifier_chain_register+0x88/0xd8 kernel/notifier.c:282 register_reboot_notifier+0x28/0x38 kernel/reboot.c:118 ubi_wl_init+0x2914/0x2c08 drivers/mtd/ubi/wl.c:1960 ubi_attach+0x2f44/0x47d0 drivers/mtd/ubi/attach.c:1605 ubi_attach_mtd_dev+0x124c/0x2864 drivers/mtd/ubi/build.c:1004 ctrl_cdev_ioctl+0x43c/0x714 drivers/mtd/ubi/cdev.c:1043 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 Allocated by task 7409: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_alloc_info+0x40/0x50 mm/kasan/generic.c:568 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_noprof+0x32c/0x54c mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] tomoyo_realpath_from_path+0xc8/0x4cc security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x218/0x588 security/tomoyo/file.c:822 tomoyo_inode_getattr+0x28/0x38 security/tomoyo/tomoyo.c:123 security_inode_getattr+0x118/0x320 security/security.c:2372 vfs_getattr fs/stat.c:243 [inline] vfs_statx_path fs/stat.c:283 [inline] vfs_statx+0x17c/0x41c fs/stat.c:347 vfs_fstatat+0xdc/0x15c fs/stat.c:366 __do_sys_newfstatat fs/stat.c:530 [inline] __se_sys_newfstatat fs/stat.c:524 [inline] __arm64_sys_newfstatat+0x10c/0x190 fs/stat.c:524 __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 Freed by task 7409: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x40/0x78 mm/kasan/common.c:68 kasan_save_free_info+0x54/0x6c mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x64/0x8c mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kfree+0x180/0x478 mm/slub.c:4761 tomoyo_realpath_from_path+0x484/0x4cc security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x218/0x588 security/tomoyo/file.c:822 tomoyo_inode_getattr+0x28/0x38 security/tomoyo/tomoyo.c:123 security_inode_getattr+0x118/0x320 security/security.c:2372 vfs_getattr fs/stat.c:243 [inline] vfs_statx_path fs/stat.c:283 [inline] vfs_statx+0x17c/0x41c fs/stat.c:347 vfs_fstatat+0xdc/0x15c fs/stat.c:366 __do_sys_newfstatat fs/stat.c:530 [inline] __se_sys_newfstatat fs/stat.c:524 [inline] __arm64_sys_newfstatat+0x10c/0x190 fs/stat.c:524 __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 The buggy address belongs to the object at ffff0000d3cc8000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2280 bytes to the right of allocated 4096-byte region [ffff0000d3cc8000, ffff0000d3cc9000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113cc8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0002140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0002140 dead000000000122 0000000000000000 head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc34f3201 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d3cc9780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d3cc9800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000d3cc9880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000d3cc9900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d3cc9980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ubi0 error: ubi_attach_mtd_dev: cannot spawn "ubi_bgt0d", error -4