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 ffff0000d71ed8e8 by task syz.2.310/8621 CPU: 1 UID: 0 PID: 8621 Comm: syz.2.310 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 7271: 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] kzalloc_noprof include/linux/slab.h:1037 [inline] ops_init+0x7c/0x4fc net/core/net_namespace.c:128 setup_net+0x270/0x8c0 net/core/net_namespace.c:362 copy_net_ns+0x2ac/0x4ac net/core/net_namespace.c:516 create_new_namespaces+0x344/0x614 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x108/0x158 kernel/nsproxy.c:228 ksys_unshare+0x484/0x858 kernel/fork.c:3333 __do_sys_unshare kernel/fork.c:3404 [inline] __se_sys_unshare kernel/fork.c:3402 [inline] __arm64_sys_unshare+0x3c/0x50 kernel/fork.c:3402 __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 ffff0000d71ec000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 1360 bytes to the right of allocated 5016-byte region [ffff0000d71ec000, ffff0000d71ed398) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1171e8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 ksm flags: 0x5ffc00000000040(head|node=0|zone=2|lastcpupid=0x7ff) page_type: f5(slab) raw: 05ffc00000000040 ffff0000c0002280 fffffdffc361f200 dead000000000003 raw: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000 head: 05ffc00000000040 ffff0000c0002280 fffffdffc361f200 dead000000000003 head: 0000000000000000 0000000000020002 00000001f5000000 0000000000000000 head: 05ffc00000000003 fffffdffc35c7a01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000d71ed780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d71ed800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff0000d71ed880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000d71ed900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000d71ed980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== ubi0: attached mtd0 (name "mtdram test device", size 0 MiB) ubi0: PEB size: 4096 bytes (4 KiB), LEB size: 3968 bytes ubi0: min./max. I/O unit sizes: 1/64, sub-page size 1 ubi0: VID header offset: 64 (aligned 64), data offset: 128 ubi0: good PEBs: 32, bad PEBs: 0, corrupted PEBs: 0 ubi0: user volume: 0, internal volumes: 1, max. volumes count: 23 ubi0: max/mean erase counter: 1/1, WL threshold: 4096, image sequence number: 1976007690 ubi0: available PEBs: 28, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0