| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <69732abe.a70a0220.35de72.0006.GAE@google.com> Date: Fri, 23 Jan 2026 00:01:02 -0800 From: syzbot <syzbot+d3a57c32b9112d7b01ec@...kaller.appspotmail.com> To: kartikey406@...il.com, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: Re: [syzbot] [jfs?] KMSAN: uninit-value in txLock Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: BUG: unable to handle kernel NULL pointer dereference in __mark_inode_dirty loop0: detected capacity change from 0 to 32768 BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 800000001381f067 P4D 800000001381f067 PUD 0 Oops: Oops: 0000 [#1] SMP PTI CPU: 1 UID: 0 PID: 6507 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(none) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026 RIP: 0010:__list_del_entry_valid include/linux/list.h:127 [inline] RIP: 0010:__list_del_entry include/linux/list.h:223 [inline] RIP: 0010:list_move include/linux/list.h:306 [inline] RIP: 0010:inode_io_list_move_locked+0x152/0x8d0 fs/fs-writeback.c:122 Code: 00 00 00 4d 8b b4 24 e8 00 00 00 48 89 7d a8 e8 54 34 cc ff 4c 8b 28 44 8b 3a 4d 85 ed 0f 85 bc 03 00 00 49 81 c4 e0 00 00 00 <49> 8b 1e 4c 89 f7 e8 33 34 cc ff 48 8b 00 48 85 c0 74 12 48 89 d9 RSP: 0018:ffff88803945b8c8 EFLAGS: 00010286 RAX: ffff88801ae0d7c8 RBX: 0000000000000000 RCX: 0000000000087a41 RDX: ffff88801b20d7c8 RSI: 0000000000000001 RDI: ffff88801b60d7c8 RBP: ffff88803945b930 R08: ffffea000000000f R09: 0000000000000000 R10: ffff88801ae0d760 R11: ffffffff844dab90 R12: ffff88801b60d7c0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f249ec6e6c0(0000) GS:ffff8881aadec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000004f37a000 CR4: 00000000003526f0 Call Trace: <TASK> __mark_inode_dirty+0x878/0x1050 fs/fs-writeback.c:2668 generic_update_time fs/inode.c:2158 [inline] inode_update_time fs/inode.c:2171 [inline] file_update_time_flags+0x9e7/0xa60 fs/inode.c:2398 file_update_time+0x30/0x40 fs/inode.c:2419 __generic_file_write_iter+0x124/0x460 mm/filemap.c:4412 generic_file_write_iter+0x131/0x980 mm/filemap.c:4457 new_sync_write fs/read_write.c:593 [inline] vfs_write+0xbe1/0x15c0 fs/read_write.c:686 ksys_pwrite64 fs/read_write.c:793 [inline] __do_sys_pwrite64 fs/read_write.c:801 [inline] __se_sys_pwrite64 fs/read_write.c:798 [inline] __x64_sys_pwrite64+0x2ab/0x3b0 fs/read_write.c:798 x64_sys_call+0xbaf/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:19 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f249dd9aef9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f249ec6e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007f249e005fa0 RCX: 00007f249dd9aef9 RDX: 00000000200000c1 RSI: 00002000000000c0 RDI: 0000000000000004 RBP: 00007f249de2fee0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000009000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f249e006038 R14: 00007f249e005fa0 R15: 00007fff32808dd8 </TASK> Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid include/linux/list.h:127 [inline] RIP: 0010:__list_del_entry include/linux/list.h:223 [inline] RIP: 0010:list_move include/linux/list.h:306 [inline] RIP: 0010:inode_io_list_move_locked+0x152/0x8d0 fs/fs-writeback.c:122 Code: 00 00 00 4d 8b b4 24 e8 00 00 00 48 89 7d a8 e8 54 34 cc ff 4c 8b 28 44 8b 3a 4d 85 ed 0f 85 bc 03 00 00 49 81 c4 e0 00 00 00 <49> 8b 1e 4c 89 f7 e8 33 34 cc ff 48 8b 00 48 85 c0 74 12 48 89 d9 RSP: 0018:ffff88803945b8c8 EFLAGS: 00010286 RAX: ffff88801ae0d7c8 RBX: 0000000000000000 RCX: 0000000000087a41 RDX: ffff88801b20d7c8 RSI: 0000000000000001 RDI: ffff88801b60d7c8 RBP: ffff88803945b930 R08: ffffea000000000f R09: 0000000000000000 R10: ffff88801ae0d760 R11: ffffffff844dab90 R12: ffff88801b60d7c0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f249ec6e6c0(0000) GS:ffff8881aadec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000004f37a000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 00 4d 8b add %cl,-0x75(%rbp) 5: b4 24 mov $0x24,%ah 7: e8 00 00 00 48 call 0x4800000c c: 89 7d a8 mov %edi,-0x58(%rbp) f: e8 54 34 cc ff call 0xffcc3468 14: 4c 8b 28 mov (%rax),%r13 17: 44 8b 3a mov (%rdx),%r15d 1a: 4d 85 ed test %r13,%r13 1d: 0f 85 bc 03 00 00 jne 0x3df 23: 49 81 c4 e0 00 00 00 add $0xe0,%r12 * 2a: 49 8b 1e mov (%r14),%rbx <-- trapping instruction 2d: 4c 89 f7 mov %r14,%rdi 30: e8 33 34 cc ff call 0xffcc3468 35: 48 8b 00 mov (%rax),%rax 38: 48 85 c0 test %rax,%rax 3b: 74 12 je 0x4f 3d: 48 89 d9 mov %rbx,%rcx Tested on: commit: c072629f Merge tag 'v6.19-p4' of git://git.kernel.org/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10b857fc580000 kernel config: https://syzkaller.appspot.com/x/.config?x=62c21fde37118981 dashboard link: https://syzkaller.appspot.com/bug?extid=d3a57c32b9112d7b01ec compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 patch: https://syzkaller.appspot.com/x/patch.diff?x=147797fc580000
Powered by blists - more mailing lists