Hello, syzbot found the following issue on: HEAD commit: aaa11ce2ffc8 Add linux-next specific files for 20220923 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=16b08124880000 kernel config: https://syzkaller.appspot.com/x/.config?x=186d1ff305f10294 dashboard link: https://syzkaller.appspot.com/bug?extid=160a7250e255d25725eb 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=17b4f3d4880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=160283c0880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/95c7bf83c07e/disk-aaa11ce2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b161cd56a7a3/vmlinux-aaa11ce2.xz Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=172283c0880000 final oops: https://syzkaller.appspot.com/x/report.txt?x=14a283c0880000 console output: https://syzkaller.appspot.com/x/log.txt?x=10a283c0880000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+160a7250e255d25725eb@xxxxxxxxxxxxxxxxxxxxxxxxx general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 3616 Comm: syz-executor849 Not tainted 6.0.0-rc6-next-20220923-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:__skb_insert include/linux/skbuff.h:2158 [inline] RIP: 0010:__skb_queue_before include/linux/skbuff.h:2264 [inline] RIP: 0010:__skb_queue_tail include/linux/skbuff.h:2297 [inline] RIP: 0010:skb_queue_tail+0x9e/0x140 net/core/skbuff.c:3402 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 4c 89 e2 4c 89 65 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 48 89 6b 08 <80> 3c 02 00 75 4f 48 8d 7b 10 49 89 2c 24 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc900000079c0 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff888070c23890 RCX: ffffffff815ffdc0 RDX: 0000000000000000 RSI: 0000000000000046 RDI: ffff888070c30a08 RBP: ffff888070c30a00 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52000000f26 R11: 000000000008c07e R12: 0000000000000000 R13: ffff888070c238a8 R14: 00000000ffff9c2b R15: ffffffff85186a70 FS: 000055555691a300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5ac5d382e8 CR3: 00000000775ec000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> ath9k_htc_txep+0x287/0x400 drivers/net/wireless/ath/ath9k/htc_drv_txrx.c:712 ath9k_htc_txcompletion_cb+0x1cd/0x2e0 drivers/net/wireless/ath/ath9k/htc_hst.c:353 hif_usb_regout_cb+0x115/0x1c0 drivers/net/wireless/ath/ath9k/hif_usb.c:90 __usb_hcd_giveback_urb+0x2b0/0x5c0 drivers/usb/core/hcd.c:1671 usb_hcd_giveback_urb+0x380/0x430 drivers/usb/core/hcd.c:1754 dummy_timer+0x11ff/0x32c0 drivers/usb/gadget/udc/dummy_hcd.c:1988 call_timer_fn+0x1da/0x7c0 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers.part.0+0x6a2/0xaf0 kernel/time/timer.c:1790 __run_timers kernel/time/timer.c:1768 [inline] run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1803 __do_softirq+0x1f7/0xad8 kernel/softirq.c:571 invoke_softirq kernel/softirq.c:445 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1107 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202 Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 ee c3 cf f7 48 89 ef e8 36 30 d0 f7 e8 81 46 f3 f7 fb bf 01 00 00 00 <e8> b6 bb c2 f7 65 8b 05 9f 9e 72 76 85 c0 74 02 5d c3 e8 ce a6 70 RSP: 0018:ffffc90003d0fdc0 EFLAGS: 00000246 RAX: 0000000000000007 RBX: ffff8880738f9d40 RCX: 1ffffffff1bc50b4 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 RBP: ffff88807aec5c80 R08: 0000000000000000 R09: 0000000000000000 R10: ffffed100f5d8b90 R11: 0000000000000001 R12: 0000000000000004 R13: 0000000008000000 R14: 0000000000000000 R15: ffff8880738fa2a0 spin_unlock_irq include/linux/spinlock.h:400 [inline] ptrace_stop.part.0+0x2f1/0x8c0 kernel/signal.c:2281 ptrace_stop kernel/signal.c:2233 [inline] ptrace_do_notify+0x215/0x2b0 kernel/signal.c:2345 ptrace_notify+0xc4/0x140 kernel/signal.c:2357 ptrace_report_syscall include/linux/ptrace.h:420 [inline] ptrace_report_syscall_entry include/linux/ptrace.h:457 [inline] syscall_trace_enter.constprop.0+0xb0/0x250 kernel/entry/common.c:65 do_syscall_64+0x16/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f5ac5d6dc1b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 03 fd ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 41 fd ff ff 8b 44 RSP: 002b:00007ffeb5f65d90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 000000000000001d RCX: 00007f5ac5d6dc1b RDX: ffffffffffffffb8 RSI: 0000000000000000 RDI: 000000000000001c RBP: 000000000000015e R08: 0000000000000000 R09: 00007ffeb5f65de0 R10: 0000000000000000 R11: 0000000000000293 R12: 00007f5ac5e3649c R13: 000000000000b212 R14: 00007f5ac5e36480 R15: 0000000000000004 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__skb_insert include/linux/skbuff.h:2158 [inline] RIP: 0010:__skb_queue_before include/linux/skbuff.h:2264 [inline] RIP: 0010:__skb_queue_tail include/linux/skbuff.h:2297 [inline] RIP: 0010:skb_queue_tail+0x9e/0x140 net/core/skbuff.c:3402 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 80 00 00 00 4c 89 e2 4c 89 65 08 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 48 89 6b 08 <80> 3c 02 00 75 4f 48 8d 7b 10 49 89 2c 24 48 b8 00 00 00 00 00 fc RSP: 0018:ffffc900000079c0 EFLAGS: 00010046 RAX: dffffc0000000000 RBX: ffff888070c23890 RCX: ffffffff815ffdc0 RDX: 0000000000000000 RSI: 0000000000000046 RDI: ffff888070c30a08 RBP: ffff888070c30a00 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52000000f26 R11: 000000000008c07e R12: 0000000000000000 R13: ffff888070c238a8 R14: 00000000ffff9c2b R15: ffffffff85186a70 FS: 000055555691a300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f5ac5d382e8 CR3: 00000000775ec000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 fa mov %rdi,%rdx 3: 48 c1 ea 03 shr $0x3,%rdx 7: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) b: 0f 85 80 00 00 00 jne 0x91 11: 4c 89 e2 mov %r12,%rdx 14: 4c 89 65 08 mov %r12,0x8(%rbp) 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 c1 ea 03 shr $0x3,%rdx 26: 48 89 6b 08 mov %rbp,0x8(%rbx) * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 4f jne 0x7f 30: 48 8d 7b 10 lea 0x10(%rbx),%rdi 34: 49 89 2c 24 mov %rbp,(%r12) 38: 48 rex.W 39: b8 00 00 00 00 mov $0x0,%eax 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@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
