loop0: detected capacity change from 0 to 4096 ntfs: volume version 3.1. ntfs: (device loop0): ntfs_lookup(): ntfs_lookup_ino_by_name() failed with error code -67. ================================================================== BUG: KASAN: null-ptr-deref in traverse_mounts fs/namei.c:1435 [inline] BUG: KASAN: null-ptr-deref in handle_mounts fs/namei.c:1547 [inline] BUG: KASAN: null-ptr-deref in step_into+0x15c/0xd1c fs/namei.c:1840 Read of size 4 at addr 0000000000000043 by task syz-executor.0/6566 CPU: 0 PID: 6566 Comm: syz-executor.0 Not tainted 6.7.0-rc6-syzkaller-00090-gaafe7ad77b91 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 print_report+0xe4/0x514 mm/kasan/report.c:478 kasan_report+0xd8/0x138 mm/kasan/report.c:588 kasan_check_range+0x254/0x294 mm/kasan/generic.c:187 __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31 traverse_mounts fs/namei.c:1435 [inline] handle_mounts fs/namei.c:1547 [inline] step_into+0x15c/0xd1c fs/namei.c:1840 walk_component+0x1d4/0x36c fs/namei.c:2008 lookup_last fs/namei.c:2459 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2483 filename_lookup+0x1d4/0x4e0 fs/namei.c:2512 user_path_at_empty+0x5c/0x84 fs/namei.c:2911 user_path_at include/linux/namei.h:57 [inline] do_utimes_path fs/utimes.c:95 [inline] do_utimes+0x118/0x264 fs/utimes.c:145 __do_sys_utimensat fs/utimes.c:164 [inline] __se_sys_utimensat fs/utimes.c:148 [inline] __arm64_sys_utimensat+0x144/0x238 fs/utimes.c:148 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 ================================================================== Unable to handle kernel NULL pointer dereference at virtual address 0000000000000043 Mem abort info: ESR = 0x0000000096000021 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x21: alignment fault Data abort info: ISV = 0, ISS = 0x00000021, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=000000010ddd5000 [0000000000000043] pgd=0800000110c48003, p4d=0800000110c48003, pud=080000011d182003, pmd=0000000000000000 Internal error: Oops: 0000000096000021 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6566 Comm: syz-executor.0 Tainted: G B 6.7.0-rc6-syzkaller-00090-gaafe7ad77b91 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : traverse_mounts fs/namei.c:1435 [inline] pc : handle_mounts fs/namei.c:1547 [inline] pc : step_into+0x15c/0xd1c fs/namei.c:1840 lr : traverse_mounts fs/namei.c:1435 [inline] lr : handle_mounts fs/namei.c:1547 [inline] lr : step_into+0x15c/0xd1c fs/namei.c:1840 sp : ffff800096f377a0 x29: ffff800096f378c0 x28: dfff800000000000 x27: 1ffff00012de6f46 x26: 0000000000000043 x25: 0000000000000001 x24: ffff800096f37860 x23: ffff800096f37878 x22: ffff800096f37a58 x21: 1ffff00012de6f0f x20: 1ffff00012de6f4b x19: ffff800096f37a20 x18: 1fffe000368261ce x17: ffff80008e4ed000 x16: ffff80008a829b6c x15: 0000000000000001 x14: 1ffff000122a4f38 x13: 0000000000000000 x12: 0000000000000000 x11: ffff7000122a4f39 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 1fffe000368261cf x6 : ffff80008028df50 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000801b85b0 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: traverse_mounts fs/namei.c:1435 [inline] handle_mounts fs/namei.c:1547 [inline] step_into+0x15c/0xd1c fs/namei.c:1840 walk_component+0x1d4/0x36c fs/namei.c:2008 lookup_last fs/namei.c:2459 [inline] path_lookupat+0x13c/0x3d0 fs/namei.c:2483 filename_lookup+0x1d4/0x4e0 fs/namei.c:2512 user_path_at_empty+0x5c/0x84 fs/namei.c:2911 user_path_at include/linux/namei.h:57 [inline] do_utimes_path fs/utimes.c:95 [inline] do_utimes+0x118/0x264 fs/utimes.c:145 __do_sys_utimensat fs/utimes.c:164 [inline] __se_sys_utimensat fs/utimes.c:148 [inline] __arm64_sys_utimensat+0x144/0x238 fs/utimes.c:148 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Code: f9406ffa 52800081 aa1a03e0 97fba64a (88dfff5a) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f9406ffa ldr x26, [sp, #216] 4: 52800081 mov w1, #0x4 // #4 8: aa1a03e0 mov x0, x26 c: 97fba64a bl 0xffffffffffee9934 * 10: 88dfff5a ldar w26, [x26] <-- trapping instruction