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AJvYcCURObsZn2qjGrRj4PtXBSbWDVDIi2EFOchsdTkVCOFLpUCsM2ObnRyXt4XqxIzyJmGEWPsQIZVCWac=@vger.kernel.org X-Gm-Message-State: AOJu0YwJ17tcnXE6QLQ0kR3R+2Z4IDkIf97MDNTQg7oE3pVyJ2iIHyH6 RyZBHMEmY2Vd5KHNOzoFANw/1h+9Udy/Zhrgu4wCYkj8WS6ZpLvY9zSL94JlMbZXdZJE0A+LyEY uCJcvtGHmnuZ3zUCtWq60G+G//kKkOVUufhy8OwB8auDRbPmYNKGYqbqSd1w= X-Google-Smtp-Source: AGHT+IHvjl/QyuFxDRTYWf4jPVTWtpTBnU+dwLC1u0ta2o/LYfdGncT7IpPF0C3C0iZpn/LSJD6l6GpSzavgzOMCbigc+P3m9nOY Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:3809:b0:434:a847:68e1 with SMTP id e9e14a558f8ab-435b9845c1cmr81030565ab.9.1763942490771; Sun, 23 Nov 2025 16:01:30 -0800 (PST) Date: Sun, 23 Nov 2025 16:01:30 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6923a05a.a70a0220.2ea503.0075.GAE@google.com> Subject: [syzbot] [iomap?] general protection fault in iomap_dio_bio_end_io From: syzbot To: brauner@kernel.org, djwong@kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: fe4d0dea039f Add linux-next specific files for 20251119 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=16bd7692580000 kernel config: https://syzkaller.appspot.com/x/.config?x=f20a6db7594dcad7 dashboard link: https://syzkaller.appspot.com/bug?extid=a2b9a4ed0d61b1efb3f5 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12db68b4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=107c0514580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ce4f26d91a01/disk-fe4d0dea.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6c9b53acf521/vmlinux-fe4d0dea.xz kernel image: https://storage.googleapis.com/syzbot-assets/64d37d01cd64/bzImage-fe4d0dea.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/004457158842/mount_1.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=133a1a12580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a2b9a4ed0d61b1efb3f5@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7] CPU: 1 UID: 0 PID: 23 Comm: ksoftirqd/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__queue_work+0xa4/0xf90 kernel/workqueue.c:2250 Code: 10 31 ff 89 ee e8 ac 24 37 00 85 ed 0f 85 9d 0c 00 00 e8 5f 20 37 00 4d 8d b5 c0 01 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 30 <0f> b6 04 18 84 c0 0f 85 c4 0c 00 00 4c 89 34 24 41 8b 2e 89 ee 81 RSP: 0018:ffffc900001d7868 EFLAGS: 00010002 RAX: 0000000000000038 RBX: dffffc0000000000 RCX: ffff88801d2d5b80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff8880777ed647 R09: 1ffff1100eefdac8 R10: dffffc0000000000 R11: ffffed100eefdac9 R12: 0000000000000008 R13: 0000000000000000 R14: 00000000000001c0 R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff888125fbc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000073fc0000 CR4: 00000000003526f0 Call Trace: queue_work_on+0x181/0x270 kernel/workqueue.c:2386 iomap_dio_bio_end_io+0xf4/0x1c0 fs/iomap/direct-io.c:222 blk_update_request+0x57e/0xe60 block/blk-mq.c:1006 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1168 blk_complete_reqs block/blk-mq.c:1243 [inline] blk_done_softirq+0x10a/0x160 block/blk-mq.c:1248 handle_softirqs+0x27d/0x880 kernel/softirq.c:626 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:1067 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__queue_work+0xa4/0xf90 kernel/workqueue.c:2250 Code: 10 31 ff 89 ee e8 ac 24 37 00 85 ed 0f 85 9d 0c 00 00 e8 5f 20 37 00 4d 8d b5 c0 01 00 00 4c 89 f0 48 c1 e8 03 48 89 44 24 30 <0f> b6 04 18 84 c0 0f 85 c4 0c 00 00 4c 89 34 24 41 8b 2e 89 ee 81 RSP: 0018:ffffc900001d7868 EFLAGS: 00010002 RAX: 0000000000000038 RBX: dffffc0000000000 RCX: ffff88801d2d5b80 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff8880777ed647 R09: 1ffff1100eefdac8 R10: dffffc0000000000 R11: ffffed100eefdac9 R12: 0000000000000008 R13: 0000000000000000 R14: 00000000000001c0 R15: 0000000000000200 FS: 0000000000000000(0000) GS:ffff888125fbc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000073fc0000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 31 ff xor %edi,%edi 2: 89 ee mov %ebp,%esi 4: e8 ac 24 37 00 call 0x3724b5 9: 85 ed test %ebp,%ebp b: 0f 85 9d 0c 00 00 jne 0xcae 11: e8 5f 20 37 00 call 0x372075 16: 4d 8d b5 c0 01 00 00 lea 0x1c0(%r13),%r14 1d: 4c 89 f0 mov %r14,%rax 20: 48 c1 e8 03 shr $0x3,%rax 24: 48 89 44 24 30 mov %rax,0x30(%rsp) * 29: 0f b6 04 18 movzbl (%rax,%rbx,1),%eax <-- trapping instruction 2d: 84 c0 test %al,%al 2f: 0f 85 c4 0c 00 00 jne 0xcf9 35: 4c 89 34 24 mov %r14,(%rsp) 39: 41 8b 2e mov (%r14),%ebp 3c: 89 ee mov %ebp,%esi 3e: 81 .byte 0x81 --- 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@googlegroups.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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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