REISERFS (device loop2): Remounting filesystem read-only general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 0 PID: 20619 Comm: syz-executor.2 Not tainted 6.7.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:reiserfs_node_data fs/reiserfs/reiserfs.h:2183 [inline] RIP: 0010:item_head fs/reiserfs/reiserfs.h:2199 [inline] RIP: 0010:tp_item_head fs/reiserfs/reiserfs.h:2225 [inline] RIP: 0010:direct2indirect+0x95b/0x1830 fs/reiserfs/tail_conversion.c:119 Code: 49 c1 e7 04 4a 8d 5c 39 08 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 3d 03 00 00 48 63 1b 49 83 c5 28 4c 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ef e8 37 d3 b1 ff 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc90005506fc0 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 0000000000000000 RCX: ffffc90005507598 RDX: dffffc0000000000 RSI: 000000000002cfbb RDI: 000000000002cfbc RBP: ffffc90005507150 R08: ffffffff8238ab0f R09: ffffffff8237d07d R10: 0000000000000002 R11: ffff88803ab63b80 R12: 0000000000000001 R13: 0000000000000028 R14: 0000000000000000 R15: 0000000000000010 FS: 00007f3772a446c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f568c8c66e4 CR3: 0000000024b37000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_get_block+0x4c34/0x5130 fs/reiserfs/inode.c:949 __block_write_begin_int+0x54d/0x1ad0 fs/buffer.c:2119 reiserfs_write_begin+0x24d/0x520 fs/reiserfs/inode.c:2767 generic_perform_write+0x31b/0x630 mm/filemap.c:3927 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4048 do_iter_readv_writev+0x330/0x4a0 do_iter_write+0x1f6/0x8d0 fs/read_write.c:860 vfs_writev fs/read_write.c:933 [inline] do_pwritev+0x21a/0x360 fs/read_write.c:1030 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f3771c7cce9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3772a440c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007f3771d9bf80 RCX: 00007f3771c7cce9 RDX: 0000000000000005 RSI: 00000000200006c0 RDI: 0000000000000004 RBP: 00007f3771cc947a R08: 0000000000000009 R09: 0000000000000010 R10: 00000000fffffff9 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f3771d9bf80 R15: 00007ffc317d79c8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:reiserfs_node_data fs/reiserfs/reiserfs.h:2183 [inline] RIP: 0010:item_head fs/reiserfs/reiserfs.h:2199 [inline] RIP: 0010:tp_item_head fs/reiserfs/reiserfs.h:2225 [inline] RIP: 0010:direct2indirect+0x95b/0x1830 fs/reiserfs/tail_conversion.c:119 Code: 49 c1 e7 04 4a 8d 5c 39 08 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 3d 03 00 00 48 63 1b 49 83 c5 28 4c 89 e8 48 c1 e8 03 <80> 3c 10 00 74 12 4c 89 ef e8 37 d3 b1 ff 48 ba 00 00 00 00 00 fc RSP: 0018:ffffc90005506fc0 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 0000000000000000 RCX: ffffc90005507598 RDX: dffffc0000000000 RSI: 000000000002cfbb RDI: 000000000002cfbc RBP: ffffc90005507150 R08: ffffffff8238ab0f R09: ffffffff8237d07d R10: 0000000000000002 R11: ffff88803ab63b80 R12: 0000000000000001 R13: 0000000000000028 R14: 0000000000000000 R15: 0000000000000010 FS: 00007f3772a446c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc45277c1f8 CR3: 0000000024b37000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 49 c1 e7 04 shl $0x4,%r15 4: 4a 8d 5c 39 08 lea 0x8(%rcx,%r15,1),%rbx 9: 48 89 d8 mov %rbx,%rax c: 48 c1 e8 03 shr $0x3,%rax 10: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 14: 84 c0 test %al,%al 16: 0f 85 3d 03 00 00 jne 0x359 1c: 48 63 1b movslq (%rbx),%rbx 1f: 49 83 c5 28 add $0x28,%r13 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 10 00 cmpb $0x0,(%rax,%rdx,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 ef mov %r13,%rdi 33: e8 37 d3 b1 ff call 0xffb1d36f 38: 48 rex.W 39: ba 00 00 00 00 mov $0x0,%edx 3e: 00 fc add %bh,%ah