Hello, syzbot found the following issue on: HEAD commit: 80bd9028feca Add linux-next specific files for 20230131 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=1468e369480000 kernel config: https://syzkaller.appspot.com/x/.config?x=904dc2f450eaad4a dashboard link: https://syzkaller.appspot.com/bug?extid=a440341a59e3b7142895 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=12c5d2be480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11259a79480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/924618188238/disk-80bd9028.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/7a03cf86e545/vmlinux-80bd9028.xz kernel image: https://storage.googleapis.com/syzbot-assets/568e80043a41/bzImage-80bd9028.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=170384f9480000 final oops: https://syzkaller.appspot.com/x/report.txt?x=148384f9480000 console output: https://syzkaller.appspot.com/x/log.txt?x=108384f9480000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a440341a59e3b7142895@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: 920756a3306a ("block: Convert bio_iov_iter_get_pages to use iov_iter_extract_pages") general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 2838 Comm: kworker/u4:6 Not tainted 6.2.0-rc6-next-20230131-syzkaller-09515-g80bd9028feca #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: phy4 ieee80211_iface_work RIP: 0010:__skb_unlink include/linux/skbuff.h:2321 [inline] RIP: 0010:__skb_dequeue include/linux/skbuff.h:2337 [inline] RIP: 0010:skb_dequeue+0xf5/0x180 net/core/skbuff.c:3511 Code: 8d 7e 08 49 8b 5c 24 08 48 b8 00 00 00 00 00 fc ff df 49 c7 44 24 08 00 00 00 00 48 89 fa 49 c7 04 24 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 6d 48 89 da 49 89 5e 08 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc9000ca2fc80 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff8808951d RDI: 0000000000000008 RBP: 0000000000000293 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52001945f7e R11: 0000000000000000 R12: ffff88801d8f63c0 R13: ffff888075675880 R14: 0000000000000000 R15: ffff888075675868 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4a51f6d150 CR3: 0000000072a78000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> ieee80211_iface_work+0x369/0xd70 net/mac80211/iface.c:1631 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_unlink include/linux/skbuff.h:2321 [inline] RIP: 0010:__skb_dequeue include/linux/skbuff.h:2337 [inline] RIP: 0010:skb_dequeue+0xf5/0x180 net/core/skbuff.c:3511 Code: 8d 7e 08 49 8b 5c 24 08 48 b8 00 00 00 00 00 fc ff df 49 c7 44 24 08 00 00 00 00 48 89 fa 49 c7 04 24 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 6d 48 89 da 49 89 5e 08 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc9000ca2fc80 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff8808951d RDI: 0000000000000008 RBP: 0000000000000293 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52001945f7e R11: 0000000000000000 R12: ffff88801d8f63c0 R13: ffff888075675880 R14: 0000000000000000 R15: ffff888075675868 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4a51f6d150 CR3: 0000000072a78000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8d 7e 08 lea 0x8(%rsi),%edi 3: 49 8b 5c 24 08 mov 0x8(%r12),%rbx 8: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax f: fc ff df 12: 49 c7 44 24 08 00 00 movq $0x0,0x8(%r12) 19: 00 00 1b: 48 89 fa mov %rdi,%rdx 1e: 49 c7 04 24 00 00 00 movq $0x0,(%r12) 25: 00 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 6d jne 0x9d 30: 48 89 da mov %rbx,%rdx 33: 49 89 5e 08 mov %rbx,0x8(%r14) 37: 48 rex.W 38: b8 00 00 00 00 mov $0x0,%eax 3d: 00 fc add %bh,%ah 3f: ff .byte 0xff --- 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
