RDX: 0000000000000000 RSI: 0000000020000600 RDI: 00000000200005c0 RBP: 00007fc1a8d171d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffc991bcedf R14: 00007fc1a8d17300 R15: 0000000000022000 ================================================================== BUG: KASAN: null-ptr-deref in memset include/linux/string.h:362 [inline] BUG: KASAN: null-ptr-deref in udf_write_fi+0x377/0xf40 fs/udf/namei.c:91 Write of size 18446744073709551572 at addr 0000000000000020 by task syz-executor.1/27152 CPU: 0 PID: 27152 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 kasan_report_error.cold+0x15b/0x1b9 mm/kasan/report.c:352 kasan_report+0x8f/0xa0 mm/kasan/report.c:412 memset+0x20/0x40 mm/kasan/kasan.c:285 memset include/linux/string.h:362 [inline] udf_write_fi+0x377/0xf40 fs/udf/namei.c:91 udf_rename+0xdb4/0x1270 fs/udf/namei.c:1185 ------------[ cut here ]------------ vfs_rename+0x67e/0x1bc0 fs/namei.c:4479 VFS: brelse: Trying to free free buffer WARNING: CPU: 1 PID: 27157 at fs/buffer.c:1144 __brelse fs/buffer.c:1144 [inline] WARNING: CPU: 1 PID: 27157 at fs/buffer.c:1144 __brelse+0x67/0xa0 fs/buffer.c:1138 Kernel panic - not syncing: panic_on_warn set ... do_renameat2+0xb59/0xc70 fs/namei.c:4629 __do_sys_rename fs/namei.c:4675 [inline] __se_sys_rename fs/namei.c:4673 [inline] __x64_sys_rename+0x5d/0x80 fs/namei.c:4673 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f27a2fc85a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f27a193b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f27a30e8f80 RCX: 00007f27a2fc85a9 RDX: 0000000000000000 RSI: 0000000020000600 RDI: 00000000200005c0 RBP: 00007f27a193b1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffe647f135f R14: 00007f27a193b300 R15: 0000000000022000 ================================================================== CPU: 1 PID: 27157 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 panic+0x26a/0x50e kernel/panic.c:186 __warn.cold+0x20/0x5a kernel/panic.c:541 report_bug+0x262/0x2b0 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296 BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 PGD 972ad067 P4D 972ad067 PUD 90de7067 PMD 0 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 Oops: 0002 [#1] PREEMPT SMP KASAN RIP: 0010:__brelse fs/buffer.c:1144 [inline] RIP: 0010:__brelse+0x67/0xa0 fs/buffer.c:1138 CPU: 0 PID: 27152 Comm: syz-executor.1 Tainted: G B 4.19.211-syzkaller #0 Code: 7c 04 84 d2 75 4e 44 8b 63 60 31 ff 44 89 e6 e8 bf 16 b2 ff 45 85 e4 75 1c e8 45 15 b2 ff 48 c7 c7 e0 1c 75 88 e8 1e 4d 42 06 <0f> 0b 5b 5d 41 5c e9 2e 15 b2 ff e8 29 15 b2 ff be 04 00 00 00 48 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RSP: 0018:ffff8880194ef9f8 EFLAGS: 00010286 RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:66 RAX: 0000000000000000 RBX: ffff88803b491c78 RCX: 0000000000000000 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RDX: 0000000000040000 RSI: ffffffff814dff01 RDI: ffffed100329df31 RSP: 0018:ffff888097b2f980 EFLAGS: 00010282 RBP: ffff88803b491cd8 R08: 0000000000000001 R09: 0000000000000000 RAX: 0000000000000000 RBX: ffff888097b2fab8 RCX: ffffffffffffffd4 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 RDX: ffffffffffffffd4 RSI: 0000000000000000 RDI: 0000000000000020 R13: ffff88803b491c78 R14: ffff88809afd3120 R15: 0000000000000531 RBP: ffff888097b2fb38 R08: 0000000000000000 R09: 0000000000000020 R10: 0000000000000005 R11: ffffffff8c66501b R12: 0000000000000006 R13: 0000000000000001 R14: 0000000000000000 R15: 000000000000001a brelse include/linux/buffer_head.h:297 [inline] udf_rename+0x92c/0x1270 fs/udf/namei.c:1226 FS: 00007f27a193b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000020 CR3: 000000009a189000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memset include/linux/string.h:362 [inline] udf_write_fi+0x377/0xf40 fs/udf/namei.c:91 vfs_rename+0x67e/0x1bc0 fs/namei.c:4479 udf_rename+0xdb4/0x1270 fs/udf/namei.c:1185 do_renameat2+0xb59/0xc70 fs/namei.c:4629 vfs_rename+0x67e/0x1bc0 fs/namei.c:4479 __do_sys_rename fs/namei.c:4675 [inline] __se_sys_rename fs/namei.c:4673 [inline] __x64_sys_rename+0x5d/0x80 fs/namei.c:4673 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fc1aa3a45a9 do_renameat2+0xb59/0xc70 fs/namei.c:4629 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc1a8d17168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007fc1aa4c4f80 RCX: 00007fc1aa3a45a9 RDX: 0000000000000000 RSI: 0000000020000600 RDI: 00000000200005c0 RBP: 00007fc1a8d171d0 R08: 0000000000000000 R09: 0000000000000000 __do_sys_rename fs/namei.c:4675 [inline] __se_sys_rename fs/namei.c:4673 [inline] __x64_sys_rename+0x5d/0x80 fs/namei.c:4673 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 R13: 00007ffc991bcedf R14: 00007fc1a8d17300 R15: 0000000000022000 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f27a2fc85a9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f27a193b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007f27a30e8f80 RCX: 00007f27a2fc85a9 RDX: 0000000000000000 RSI: 0000000020000600 RDI: 00000000200005c0 RBP: 00007f27a193b1d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffe647f135f R14: 00007f27a193b300 R15: 0000000000022000 Modules linked in: CR2: 0000000000000020 ---[ end trace 20c678c55b621be8 ]--- RIP: 0010:memset_erms+0x9/0x10 arch/x86/lib/memset_64.S:66 Code: c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01 01 RSP: 0018:ffff888097b2f980 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888097b2fab8 RCX: ffffffffffffffd4 RDX: ffffffffffffffd4 RSI: 0000000000000000 RDI: 0000000000000020 RBP: ffff888097b2fb38 R08: 0000000000000000 R09: 0000000000000020 R10: 0000000000000005 R11: ffffffff8c66501b R12: 0000000000000006 R13: 0000000000000001 R14: 0000000000000000 R15: 000000000000001a FS: 00007f27a193b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000020 CR3: 000000009a189000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: c1 e9 03 shr $0x3,%ecx 3: 40 0f b6 f6 movzbl %sil,%esi 7: 48 b8 01 01 01 01 01 movabs $0x101010101010101,%rax e: 01 01 01 11: 48 0f af c6 imul %rsi,%rax 15: f3 48 ab rep stos %rax,%es:(%rdi) 18: 89 d1 mov %edx,%ecx 1a: f3 aa rep stos %al,%es:(%rdi) 1c: 4c 89 c8 mov %r9,%rax 1f: c3 retq 20: 90 nop 21: 49 89 f9 mov %rdi,%r9 24: 40 88 f0 mov %sil,%al 27: 48 89 d1 mov %rdx,%rcx * 2a: f3 aa rep stos %al,%es:(%rdi) <-- trapping instruction 2c: 4c 89 c8 mov %r9,%rax 2f: c3 retq 30: 90 nop 31: 49 89 fa mov %rdi,%r10 34: 40 0f b6 ce movzbl %sil,%ecx 38: 48 rex.W 39: b8 01 01 01 01 mov $0x1010101,%eax 3e: 01 01 add %eax,(%rcx)