syzbot has found a reproducer for the following crash on: HEAD commit: 2019fc96 Merge git://git.kernel.org/pub/scm/linux/kernel/g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1677602de00000 kernel config: https://syzkaller.appspot.com/x/.config?x=6780df5a5f208964 dashboard link: https://syzkaller.appspot.com/bug?extid=f2a62d07a5198c819c7b compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16dcd87ee00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1135fa31e00000 Bisection is inconclusive: the bug happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13204371e00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=10a04371e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=17204371e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+f2a62d07a5198c819c7b@xxxxxxxxxxxxxxxxxxxxxxxxx Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: vhost_net_ioctl+0x1d83/0x1db0 drivers/vhost/net.c:366 CPU: 0 PID: 8673 Comm: syz-executor239 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fb/0x318 lib/dump_stack.c:118 panic+0x264/0x7a9 kernel/panic.c:221 __stack_chk_fail+0x1f/0x20 kernel/panic.c:667 vhost_net_ioctl+0x1d83/0x1db0 drivers/vhost/net.c:366 vfs_ioctl fs/ioctl.c:47 [inline] ksys_ioctl fs/ioctl.c:763 [inline] __do_sys_ioctl fs/ioctl.c:772 [inline] __se_sys_ioctl+0x113/0x190 fs/ioctl.c:770 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:770 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440259 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdeb5890b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440259 RDX: 0000000020f1dff8 RSI: 000000004008af30 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000401ae0 R13: 0000000000401b70 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..
