Hello, syzbot found the following issue on: HEAD commit: 4fafd96910ad Add linux-next specific files for 20230203 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=17e5d623480000 kernel config: https://syzkaller.appspot.com/x/.config?x=1d2fba7d42502ca4 dashboard link: https://syzkaller.appspot.com/bug?extid=c0998868487c1f7e05e5 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=148901bb480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14911ba5480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/348cc2da441a/disk-4fafd969.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e2dedc500f12/vmlinux-4fafd969.xz kernel image: https://storage.googleapis.com/syzbot-assets/fae710d9ebd8/bzImage-4fafd969.xz The issue was bisected to: commit 920756a3306a35f1c08f25207d375885bef98975 Author: David Howells <dhowells@xxxxxxxxxx> Date: Sat Jan 21 12:51:18 2023 +0000 block: Convert bio_iov_iter_get_pages to use iov_iter_extract_pages bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13d93dd9480000 final oops: https://syzkaller.appspot.com/x/report.txt?x=10393dd9480000 console output: https://syzkaller.appspot.com/x/log.txt?x=17d93dd9480000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c0998868487c1f7e05e5@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 920756a3306a ("block: Convert bio_iov_iter_get_pages to use iov_iter_extract_pages") skbuff: skb_over_panic: text:ffffffff8615b76f len:20 put:20 head:0000000000000000 data:0000000000000000 tail:0x14 end:0x0 dev:<NULL> ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:122! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 6.2.0-rc6-next-20230203-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: events nsim_dev_trap_report_work RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:122 Code: 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 70 41 56 45 89 e8 48 c7 c7 40 11 5c 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 de 43 5e f9 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 a9 66 c9 f9 4c RSP: 0018:ffffc90000a1fbc0 EFLAGS: 00010286 RAX: 0000000000000084 RBX: ffff88802b3e6500 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8168dfbc RDI: 0000000000000005 RBP: ffffffff8b5c1f80 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000000 R12: ffffffff8615b76f R13: 0000000000000014 R14: ffffffff8b5c1100 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdf942b0150 CR3: 000000007a8e3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> skb_over_panic net/core/skbuff.c:127 [inline] skb_put+0x16f/0x1a0 net/core/skbuff.c:2261 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:764 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline] nsim_dev_trap_report_work+0x4df/0xc80 drivers/net/netdevsim/dev.c:853 process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x152/0x1d0 net/core/skbuff.c:122 Code: 0f b6 04 01 84 c0 74 04 3c 03 7e 20 8b 4b 70 41 56 45 89 e8 48 c7 c7 40 11 5c 8b 41 57 56 48 89 ee 52 4c 89 e2 e8 de 43 5e f9 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 a9 66 c9 f9 4c RSP: 0018:ffffc90000a1fbc0 EFLAGS: 00010286 RAX: 0000000000000084 RBX: ffff88802b3e6500 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8168dfbc RDI: 0000000000000005 RBP: ffffffff8b5c1f80 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000000 R12: ffffffff8615b76f R13: 0000000000000014 R14: ffffffff8b5c1100 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdf942b0150 CR3: 000000007a8e3000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
