[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 14.200992][ C1] random: crng init done [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.234' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 34.685993][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 34.925923][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 35.045991][ T12] usb 1-1: config 0 has an invalid interface number: 28 but max is 0 [ 35.054171][ T12] usb 1-1: config 0 has no interface number 0 [ 35.060310][ T12] usb 1-1: config 0 interface 28 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7 [ 35.071220][ T12] usb 1-1: New USB device found, idVendor=0f11, idProduct=2020, bcdDevice=48.c9 [ 35.080270][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 35.089859][ T12] usb 1-1: config 0 descriptor?? [ 35.130551][ T12] ldusb 1-1:0.28: LD USB Device #0 now attached to major 180 minor 0 [ 35.373610][ T81] usb 1-1: USB disconnect, device number 2 [ 35.386126][ T1719] ldusb 1-1:0.28: Read buffer overflow, -3472032754962774480 bytes dropped [ 35.394839][ T1719] usercopy: Kernel memory exposure attempt detected from process stack (offset 0, size 2147479552)! [ 35.405755][ T1719] ------------[ cut here ]------------ [ 35.411188][ T1719] kernel BUG at mm/usercopy.c:98! [ 35.416222][ T1719] invalid opcode: 0000 [#1] SMP KASAN [ 35.421579][ T1719] CPU: 0 PID: 1719 Comm: syz-executor764 Not tainted 5.3.0+ #0 [ 35.429097][ T1719] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.439176][ T1719] RIP: 0010:usercopy_abort+0xb9/0xbb [ 35.444434][ T1719] Code: e8 22 e2 d6 ff 49 89 d9 4d 89 e8 4c 89 e1 41 56 48 89 ee 48 c7 c7 40 fc cd 85 ff 74 24 08 41 57 48 8b 54 24 20 e8 d6 6b c1 ff <0f> 0b e8 f6 e1 d6 ff e8 a1 90 fd ff 8b 54 24 04 49 89 d8 4c 89 e1 [ 35.464011][ T1719] RSP: 0018:ffff8881d3267c40 EFLAGS: 00010282 [ 35.470056][ T1719] RAX: 0000000000000061 RBX: ffffffff85cdf960 RCX: 0000000000000000 [ 35.478000][ T1719] RDX: 0000000000000000 RSI: ffffffff8128d9ad RDI: ffffed103a64cf7a [ 35.485944][ T1719] RBP: ffffffff85cdfb20 R08: 0000000000000061 R09: fffffbfff11b35b5 [ 35.493889][ T1719] R10: fffffbfff11b35b4 R11: ffffffff88d9ada7 R12: ffffffff85cdfd40 [ 35.501834][ T1719] R13: ffffffff85cdf960 R14: 000000007ffff000 R15: ffffffff85cdf960 [ 35.509780][ T1719] FS: 00007fa15f4dc700(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 35.518680][ T1719] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.525238][ T1719] CR2: 00007f27d80a3000 CR3: 00000001c65a8000 CR4: 00000000001406f0 [ 35.533194][ T1719] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.541137][ T1719] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.549079][ T1719] Call Trace: [ 35.552347][ T1719] __check_object_size.cold+0x91/0xbb [ 35.557694][ T1719] ? ld_usb_read+0x2e2/0x780 [ 35.562258][ T1719] ld_usb_read+0x304/0x780 [ 35.566648][ T1719] ? ld_usb_write+0xa10/0xa10 [ 35.571297][ T1719] ? finish_wait+0x260/0x260 [ 35.575867][ T1719] ? security_file_permission+0x8a/0x370 [ 35.581474][ T1719] ? ld_usb_write+0xa10/0xa10 [ 35.586149][ T1719] __vfs_read+0x76/0x100 [ 35.590370][ T1719] vfs_read+0x1ea/0x430 [ 35.594508][ T1719] ksys_read+0x1e8/0x250 [ 35.598722][ T1719] ? kernel_write+0x120/0x120 [ 35.603382][ T1719] ? hrtimer_nanosleep+0x4f0/0x4f0 [ 35.608468][ T1719] ? trace_hardirqs_off_caller+0x55/0x1e0 [ 35.614157][ T1719] do_syscall_64+0xb7/0x580 [ 35.618645][ T1719] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 35.624506][ T1719] RIP: 0033:0x446fe9 [ 35.628371][ T1719] Code: e8 ac b5 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 eb 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 35.647947][ T1719] RSP: 002b:00007fa15f4dbce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 35.656329][ T1719] RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000446fe9 [ 35.664285][ T1719] RDX: 000000010000011b RSI: 0000000020000400 RDI: 0000000000000004 [ 35.672238][ T1719] RBP: 00000000006dcc20 R08: 0000000000000000 R09: 0000000000000000 [ 35.680183][ T1719] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dcc2c [ 35.688132][ T1719] R13: 00007ffc453af1ef R14: 00007fa15f4dc9c0 R15: 20c49ba5e353f7cf [ 35.696077][ T1719] Modules linked in: [ 35.700028][ T1719] ---[ end trace 443ae5484c4e9743 ]--- [ 35.705485][ T1719] RIP: 0010:usercopy_abort+0xb9/0xbb [ 35.710774][ T1719] Code: e8 22 e2 d6 ff 49 89 d9 4d 89 e8 4c 89 e1 41 56 48 89 ee 48 c7 c7 40 fc cd 85 ff 74 24 08 41 57 48 8b 54 24 20 e8 d6 6b c1 ff <0f> 0b e8 f6 e1 d6 ff e8 a1 90 fd ff 8b 54 24 04 49 89 d8 4c 89 e1 [ 35.730383][ T1719] RSP: 0018:ffff8881d3267c40 EFLAGS: 00010282 [ 35.736447][ T1719] RAX: 0000000000000061 RBX: ffffffff85cdf960 RCX: 0000000000000000 [ 35.744400][ T1719] RDX: 0000000000000000 RSI: ffffffff8128d9ad RDI: ffffed103a64cf7a [ 35.752370][ T1719] RBP: ffffffff85cdfb20 R08: 0000000000000061 R09: fffffbfff11b35b5 [ 35.760357][ T1719] R10: fffffbfff11b35b4 R11: ffffffff88d9ada7 R12: ffffffff85cdfd40 [ 35.768329][ T1719] R13: ffffffff85cdf960 R14: 000000007ffff000 R15: ffffffff85cdf960 [ 35.776302][ T1719] FS: 00007fa15f4dc700(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 [ 35.785209][ T1719] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 35.791805][ T1719] CR2: 00007f27d80a3000 CR3: 00000001c65a8000 CR4: 00000000001406f0 [ 35.799951][ T1719] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 35.807935][ T1719] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 35.815908][ T1719] Kernel panic - not syncing: Fatal exception [ 35.822542][ T1719] Kernel Offset: disabled [ 35.826849][ T1719] Rebooting in 86400 seconds..