bisecting fixing commit since 13d2ce42de8cb98ff952f8de6307f896203854c2 building syzkaller on 04201c0669446145fd9c347c5538da0ca13ff29b testing commit 13d2ce42de8cb98ff952f8de6307f896203854c2 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: ff537ae628813e3a5f94aea3ddacd7ea375d9cb5261f36792b247a00f151969b run #0: crashed: WARNING in handle_desc run #1: crashed: WARNING in handle_desc run #2: crashed: WARNING in handle_desc run #3: crashed: WARNING in handle_desc run #4: crashed: WARNING in handle_desc run #5: crashed: WARNING in handle_desc run #6: crashed: WARNING in handle_desc run #7: crashed: WARNING in handle_desc run #8: crashed: WARNING in handle_desc run #9: crashed: WARNING in handle_desc run #10: crashed: WARNING in corrupted run #11: crashed: WARNING in handle_desc run #12: crashed: WARNING in handle_desc run #13: crashed: WARNING in handle_desc run #14: crashed: WARNING in corrupted run #15: crashed: WARNING in handle_desc run #16: crashed: WARNING in handle_desc run #17: crashed: WARNING in handle_desc run #18: crashed: WARNING in handle_desc run #19: crashed: WARNING in handle_desc testing current HEAD 53bd76690e27f37c9df221a651a52cea04214da9 testing commit 53bd76690e27f37c9df221a651a52cea04214da9 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 1dc4b73f75c93dc253ec5faf6dc6e960f1affb33d23bc58bd8dcec89700280b4 run #0: crashed: WARNING in handle_desc run #1: crashed: WARNING in handle_desc run #2: crashed: WARNING in handle_desc run #3: crashed: WARNING in handle_desc run #4: crashed: WARNING in handle_desc run #5: crashed: WARNING in handle_desc run #6: crashed: WARNING in handle_desc run #7: crashed: WARNING in corrupted run #8: crashed: WARNING in handle_desc run #9: crashed: WARNING in handle_desc revisions tested: 2, total time: 26m25.346689714s (build: 19m15.773455138s, test: 6m41.595937491s) the crash still happens on HEAD commit msg: Linux 4.19.200 crash: WARNING in handle_desc wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready ------------[ cut here ]------------ IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready WARNING: CPU: 1 PID: 9900 at arch/x86/kvm/vmx.c:7239 handle_desc.cold.77+0xc/0x13 arch/x86/kvm/vmx.c:7239 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9900 Comm: syz-executor.2 Not tainted 4.19.200-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: Bluetooth: hci1: command 0x0419 tx timeout Bluetooth: hci2: command 0x0419 tx timeout __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x17c/0x226 lib/dump_stack.c:118 Bluetooth: hci0: command 0x0419 tx timeout panic+0x1cd/0x375 kernel/panic.c:186 __warn.cold.7+0x1b/0x36 kernel/panic.c:541 report_bug+0x1a1/0x200 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:handle_desc.cold.77+0xc/0x13 arch/x86/kvm/vmx.c:7239 Code: 00 e9 7d 45 95 f9 48 c7 c7 60 6c 03 88 c6 05 75 60 38 03 01 e8 1e 9d 01 00 e9 85 45 95 f9 48 c7 c7 20 68 03 88 e8 0d 9d 01 00 <0f> 0b e9 b0 4e 95 f9 44 89 f6 48 c7 c7 80 6f 03 88 c6 05 49 60 38 RSP: 0018:ffff888097bd78e8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff8880974f0040 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8bada720 RBP: ffff888097bd78f0 R08: ffffed1017463d03 R09: ffffed1017463d02 R10: ffffed1017463d02 R11: ffff8880ba31e817 R12: 000000000000002e R13: ffff8880974f0040 R14: 0000000000000001 R15: ffff8880974f0070 vmx_handle_exit+0x1bd/0x11b0 arch/x86/kvm/vmx.c:10168 vcpu_enter_guest arch/x86/kvm/x86.c:7844 [inline] vcpu_run arch/x86/kvm/x86.c:7907 [inline] kvm_arch_vcpu_ioctl_run+0x245a/0x5b90 arch/x86/kvm/x86.c:8107 ------------[ cut here ]------------ kvm_vcpu_ioctl+0x535/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2846 WARNING: CPU: 0 PID: 9917 at arch/x86/kvm/vmx.c:7239 handle_desc.cold.77+0xc/0x13 arch/x86/kvm/vmx.c:7239 Modules linked in: CPU: 0 PID: 9917 Comm: syz-executor.3 Not tainted 4.19.200-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 RIP: 0010:handle_desc.cold.77+0xc/0x13 arch/x86/kvm/vmx.c:7239 Code: 00 e9 7d 45 95 f9 48 c7 c7 60 6c 03 88 c6 05 75 60 38 03 01 e8 1e 9d 01 00 e9 85 45 95 f9 48 c7 c7 20 68 03 88 e8 0d 9d 01 00 <0f> 0b e9 b0 4e 95 f9 44 89 f6 48 c7 c7 80 6f 03 88 c6 05 49 60 38 RSP: 0018:ffff8880a31978e8 EFLAGS: 00010282 RAX: 0000000000000024 RBX: ffff88809d378080 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff88502180 RDI: ffffffff8bada720 RBP: ffff8880a31978f0 R08: ffffed1017444e99 R09: ffffed1017444e98 R10: ffffed1017444e98 R11: ffff8880ba2274c7 R12: 000000000000002e R13: ffff88809d378080 R14: 0000000000000001 R15: ffff88809d3780b0 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 FS: 00007fe9904ea700(0000) GS:ffff8880ba200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 CR2: 0000000000000000 CR3: 0000000098aa1000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465a59 vmx_handle_exit+0x1bd/0x11b0 arch/x86/kvm/vmx.c:10168 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 vcpu_enter_guest arch/x86/kvm/x86.c:7844 [inline] vcpu_run arch/x86/kvm/x86.c:7907 [inline] kvm_arch_vcpu_ioctl_run+0x245a/0x5b90 arch/x86/kvm/x86.c:8107 RSP: 002b:00007f4b81518188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000055bf40 RCX: 0000000000465a59 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00000000004af682 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf40 R13: 00007ffc1086351f R14: 00007f4b81518300 R15: 0000000000022000 kvm_vcpu_ioctl+0x535/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2846 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x196/0x10c0 fs/ioctl.c:688 ksys_ioctl+0x62/0x90 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:710 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465a59 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe9904ea188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000055bf40 RCX: 0000000000465a59 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00000000004af682 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000055bf40 R13: 00007ffdd1428cef R14: 00007fe9904ea300 R15: 0000000000022000 irq event stamp: 5858 hardirqs last enabled at (5857): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (5857): [] _raw_spin_unlock_irq+0x27/0x90 kernel/locking/spinlock.c:192 hardirqs last disabled at (5858): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (4148): [] __do_softirq+0x62d/0x919 kernel/softirq.c:318 softirqs last disabled at (4133): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (4133): [] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 ---[ end trace 36bcc489354f048d ]--- Kernel Offset: disabled Rebooting in 86400 seconds..