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Message-ID: <67256f23.050a0220.35b515.017e.GAE@google.com> Date: Fri, 01 Nov 2024 17:15:31 -0700 From: syzbot <syzbot+1d38eedcb25a3b5686a7@...kaller.appspotmail.com> To: axboe@...nel.dk, linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [block?] general protection fault in blk_update_request Hello, syzbot found the following issue on: HEAD commit: 819837584309 Linux 6.12-rc5 git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14ec6ca7980000 kernel config: https://syzkaller.appspot.com/x/.config?x=4aec7739e14231a7 dashboard link: https://syzkaller.appspot.com/bug?extid=1d38eedcb25a3b5686a7 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7eaadcc9db59/disk-81983758.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/9ffd56091c79/vmlinux-81983758.xz kernel image: https://storage.googleapis.com/syzbot-assets/c49f66756e3e/bzImage-81983758.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+1d38eedcb25a3b5686a7@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xe01ffbf110170c7f: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0x00ffff8880b863f8-0x00ffff8880b863ff] CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065 Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d c8 e8 ac 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 79 48 8e 00 48 be 00 00 00 00 00 fc RSP: 0018:ffffc90000157610 EFLAGS: 00010013 RAX: 001ffff110170c7f RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00ffff8880b863fe RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: dffffc0000000000 R11: fffffbfff203a066 R12: ffff88801d2bda00 R13: 0000000000000001 R14: 0000000000000000 R15: 00ffff8880b863fe FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3091aff8 CR3: 000000000e734000 CR4: 0000000000350ef0 Call Trace: <TASK> lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 __queue_work+0x759/0xf50 queue_work_on+0x1c2/0x380 kernel/workqueue.c:2390 blk_update_request+0x5e5/0x1160 block/blk-mq.c:923 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1051 blk_flush_complete_seq+0x6b7/0xce0 block/blk-flush.c:191 flush_end_io+0xab1/0xdc0 block/blk-flush.c:250 __blk_mq_end_request+0x4a5/0x620 block/blk-mq.c:1041 blk_complete_reqs block/blk-mq.c:1126 [inline] blk_done_softirq+0x102/0x150 block/blk-mq.c:1131 handle_softirqs+0x2c7/0x980 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:927 smpboot_thread_fn+0x546/0xa30 kernel/smpboot.c:164 kthread+0x2f2/0x390 kernel/kthread.c:389 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__lock_acquire+0x69/0x2050 kernel/locking/lockdep.c:5065 Code: b6 04 30 84 c0 0f 85 9b 16 00 00 45 31 f6 83 3d c8 e8 ac 0e 00 0f 84 b6 13 00 00 89 54 24 54 89 5c 24 68 4c 89 f8 48 c1 e8 03 <80> 3c 30 00 74 12 4c 89 ff e8 79 48 8e 00 48 be 00 00 00 00 00 fc RSP: 0018:ffffc90000157610 EFLAGS: 00010013 RAX: 001ffff110170c7f RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: 00ffff8880b863fe RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: dffffc0000000000 R11: fffffbfff203a066 R12: ffff88801d2bda00 R13: 0000000000000001 R14: 0000000000000000 R15: 00ffff8880b863fe FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3091aff8 CR3: 000000000e734000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: b6 04 mov $0x4,%dh 2: 30 84 c0 0f 85 9b 16 xor %al,0x169b850f(%rax,%rax,8) 9: 00 00 add %al,(%rax) b: 45 31 f6 xor %r14d,%r14d e: 83 3d c8 e8 ac 0e 00 cmpl $0x0,0xeace8c8(%rip) # 0xeace8dd 15: 0f 84 b6 13 00 00 je 0x13d1 1b: 89 54 24 54 mov %edx,0x54(%rsp) 1f: 89 5c 24 68 mov %ebx,0x68(%rsp) 23: 4c 89 f8 mov %r15,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 30 00 cmpb $0x0,(%rax,%rsi,1) <-- trapping instruction 2e: 74 12 je 0x42 30: 4c 89 ff mov %r15,%rdi 33: e8 79 48 8e 00 call 0x8e48b1 38: 48 rex.W 39: be 00 00 00 00 mov $0x0,%esi 3e: 00 fc add %bh,%ah --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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