do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 ================================================================== BUG: KASAN: out-of-bounds in udf_write_fi+0x3e4/0x920 Write of size 18446744073709551572 at addr ffff0001167d362c by task syz-executor.5/13810 CPU: 0 PID: 13810 Comm: syz-executor.5 Not tainted 6.1.45-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x174/0x4c0 mm/kasan/report.c:395 kasan_report+0xd4/0x130 mm/kasan/report.c:495 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189 memset+0x40/0x70 mm/kasan/shadow.c:44 udf_write_fi+0x3e4/0x920 udf_delete_entry fs/udf/namei.c:577 [inline] udf_rename+0x90c/0x10b0 fs/udf/namei.c:1173 vfs_rename+0x8b8/0xd04 fs/namei.c:4785 do_renameat2+0x980/0x1040 fs/namei.c:4935 __do_sys_renameat2 fs/namei.c:4968 [inline] __se_sys_renameat2 fs/namei.c:4965 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:4965 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 The buggy address belongs to the physical page: page:000000000c13465f refcount:2 mapcount:0 mapping:0000000091fa8d85 index:0xe pfn:0x1567d3 memcg:ffff0000d912c000 aops:def_blk_aops ino:700005 flags: 0x5ffca000000205a(referenced|dirty|lru|workingset|private|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffca000000205a fffffc000459f488 ffff0000d912e168 ffff0000c0498810 raw: 000000000000000e ffff0001318e2658 00000002ffffffff ffff0000d912c000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0001167d3500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0001167d3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0001167d3600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff0001167d3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0001167d3700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Unable to handle kernel paging request at virtual address dfff800000000003 KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000003] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 13810 Comm: syz-executor.5 Tainted: G B 6.1.45-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : crc_itu_t+0x5c/0x108 lib/crc-itu-t.c:60 lr : crc_itu_t+0x38/0x108 lib/crc-itu-t.c:59 sp : ffff8000206a7540 x29: ffff8000206a7550 x28: ffff0000dfc0f740 x27: 00000000fffffff0 x26: ffff8000206a7708 x25: 1ffff000040d4ee1 x24: ffff800012742c00 x23: 000000000000ffd9 x22: dfff800000000000 x21: 000000000000001a x20: 000000000000001a x19: 0000000057313472 x18: 1fffe000368aa376 x17: ffff80001589d000 x16: ffff800012116f84 x15: ffff0001b4551bbc x14: ffff0001b4551bb8 x13: 1fffe000368aa376 x12: 0000000000040000 x11: ff8080000aad52b8 x10: 0000000000000002 x9 : 0000000000000002 x8 : 0000000000000003 x7 : 1fffe000368aa377 x6 : ffff80000827c584 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000081aea9c x2 : 000000000000ffda x1 : 000000000000ffda x0 : 0000000000000000 Call trace: crc_itu_t+0x5c/0x108 lib/crc-itu-t.c:60 udf_write_fi+0x4cc/0x920 fs/udf/namei.c:103 udf_delete_entry fs/udf/namei.c:577 [inline] udf_rename+0x90c/0x10b0 fs/udf/namei.c:1173 vfs_rename+0x8b8/0xd04 fs/namei.c:4785 do_renameat2+0x980/0x1040 fs/namei.c:4935 __do_sys_renameat2 fs/namei.c:4968 [inline] __se_sys_renameat2 fs/namei.c:4965 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:4965 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: b003e378 91300318 d343fea8 12000aa9 (38f66908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: b003e378 adrp x24, 0x7c6d000 4: 91300318 add x24, x24, #0xc00 8: d343fea8 lsr x8, x21, #3 c: 12000aa9 and w9, w21, #0x7 * 10: 38f66908 ldrsb w8, [x8, x22] <-- trapping instruction