[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 15.211796][ C1] random: crng init done [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.78' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 51.721324][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 51.961295][ T12] usb 1-1: Using ep0 maxpacket: 32 [ 52.081456][ T12] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 52.092985][ T12] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 52.106121][ T12] usb 1-1: New USB device found, idVendor=046d, idProduct=c71c, bcdDevice= 0.40 [ 52.115699][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.125160][ T12] usb 1-1: config 0 descriptor?? [ 52.605469][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.613962][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.622334][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.630584][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.638833][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.647617][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.655876][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.664323][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.672847][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.681062][ T12] logitech-djreceiver 0003:046D:C71C.0001: unknown main item tag 0x0 [ 52.691483][ T12] logitech-djreceiver 0003:046D:C71C.0001: hidraw0: USB HID v0.00 Device [HID 046d:c71c] on usb-dummy_hcd.0-1/input0 executing program [ 52.803238][ T83] usb 1-1: USB disconnect, device number 2 [ 53.161289][ T83] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 53.401315][ T83] usb 1-1: Using ep0 maxpacket: 32 [ 53.521391][ T83] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x81 has an invalid bInterval 0, changing to 7 [ 53.532455][ T83] usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9 [ 53.546025][ T83] usb 1-1: New USB device found, idVendor=046d, idProduct=c71c, bcdDevice= 0.40 [ 53.555812][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 53.565586][ T83] usb 1-1: config 0 descriptor?? [ 54.052768][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.060986][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.069467][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.077780][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.086341][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.094713][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.103085][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.111434][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.119993][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.128270][ T83] logitech-djreceiver 0003:046D:C71C.0002: unknown main item tag 0x0 [ 54.137961][ T83] logitech-djreceiver 0003:046D:C71C.0002: hidraw1: USB HID v0.00 Device [HID 046d:c71c] on usb-dummy_hcd.0-1/input0 [ 54.251712][ T1726] ================================================================== [ 54.260074][ T1726] BUG: KASAN: use-after-free in hidraw_ioctl+0x5e1/0xae0 [ 54.267236][ T1726] Read of size 4 at addr ffff8881d2c78018 by task syz-executor037/1726 [ 54.275921][ T1726] [ 54.279127][ T1726] CPU: 0 PID: 1726 Comm: syz-executor037 Not tainted 5.3.0-rc2+ #25 [ 54.287231][ T1726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.298091][ T1726] Call Trace: [ 54.301547][ T1726] dump_stack+0xca/0x13e [ 54.306268][ T1726] ? hidraw_ioctl+0x5e1/0xae0 [ 54.311224][ T1726] ? hidraw_ioctl+0x5e1/0xae0 [ 54.316000][ T1726] print_address_description+0x6a/0x32c [ 54.321707][ T1726] ? hidraw_ioctl+0x5e1/0xae0 [ 54.326655][ T1726] ? hidraw_ioctl+0x5e1/0xae0 [ 54.331338][ T1726] __kasan_report.cold+0x1a/0x33 [ 54.337386][ T1726] ? hidraw_ioctl+0x5e1/0xae0 [ 54.342365][ T1726] kasan_report+0xe/0x12 [ 54.346630][ T1726] hidraw_ioctl+0x5e1/0xae0 [ 54.351473][ T1726] ? hidraw_disconnect+0x2c0/0x2c0 [ 54.356743][ T1726] ? lock_acquire+0x127/0x320 [ 54.361531][ T1726] ? debug_object_free+0x52/0x340 [ 54.366622][ T1726] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 54.373068][ T1726] ? hidraw_disconnect+0x2c0/0x2c0 [ 54.378246][ T1726] do_vfs_ioctl+0xd2d/0x1330 [ 54.383270][ T1726] ? ioctl_preallocate+0x200/0x200 [ 54.388473][ T1726] ? hrtimer_nanosleep+0x28a/0x510 [ 54.393567][ T1726] ? nanosleep_copyout+0x100/0x100 [ 54.398669][ T1726] ? _copy_from_user+0x123/0x190 [ 54.403947][ T1726] ? clock_was_set_work+0x20/0x20 [ 54.409361][ T1726] ? put_old_itimerspec32+0x1d0/0x1d0 [ 54.414728][ T1726] ksys_ioctl+0x9b/0xc0 [ 54.419023][ T1726] __x64_sys_ioctl+0x6f/0xb0 [ 54.423620][ T1726] ? lockdep_hardirqs_on+0x379/0x580 [ 54.428986][ T1726] do_syscall_64+0xb7/0x580 [ 54.433581][ T1726] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.439474][ T1726] RIP: 0033:0x4456b9 [ 54.443835][ T1726] Code: e8 5c ad 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 9b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 54.465233][ T1726] RSP: 002b:00007ffe9dc59908 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 54.473834][ T1726] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004456b9 [ 54.482033][ T1726] RDX: 00000000200003c0 RSI: 0000000090044802 RDI: 0000000000000003 [ 54.490102][ T1726] RBP: 000000000000c8e8 R08: 00000000004002e0 R09: 00000000004002e0 [ 54.498238][ T1726] R10: 000000000000000b R11: 0000000000000246 R12: 00000000004028e0 [ 54.506832][ T1726] R13: 0000000000402970 R14: 0000000000000000 R15: 0000000000000000 [ 54.515814][ T1726] [ 54.518132][ T1726] Allocated by task 331: [ 54.522464][ T1726] save_stack+0x1b/0x80 [ 54.526728][ T1726] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 54.532472][ T1726] kmem_cache_alloc+0xd6/0x2d0 [ 54.537455][ T1726] getname_flags+0xd2/0x5b0 [ 54.541955][ T1726] user_path_at_empty+0x2a/0x50 [ 54.546811][ T1726] vfs_statx+0x113/0x1e0 [ 54.551155][ T1726] __do_sys_newstat+0x96/0x120 [ 54.556079][ T1726] do_syscall_64+0xb7/0x580 [ 54.561563][ T1726] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.567455][ T1726] [ 54.570105][ T1726] Freed by task 331: [ 54.574038][ T1726] save_stack+0x1b/0x80 [ 54.578283][ T1726] __kasan_slab_free+0x130/0x180 [ 54.584230][ T1726] kmem_cache_free+0xb9/0x380 [ 54.589252][ T1726] putname+0xe1/0x120 [ 54.594604][ T1726] filename_lookup+0x28f/0x410 [ 54.599852][ T1726] vfs_statx+0x113/0x1e0 [ 54.604524][ T1726] __do_sys_newstat+0x96/0x120 [ 54.610517][ T1726] do_syscall_64+0xb7/0x580 [ 54.615180][ T1726] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.621522][ T1726] [ 54.624028][ T1726] The buggy address belongs to the object at ffff8881d2c78000 [ 54.624028][ T1726] which belongs to the cache names_cache of size 4096 [ 54.640445][ T1726] The buggy address is located 24 bytes inside of [ 54.640445][ T1726] 4096-byte region [ffff8881d2c78000, ffff8881d2c79000) [ 54.668469][ T1726] The buggy address belongs to the page: [ 54.674485][ T1726] page:ffffea00074b1e00 refcount:1 mapcount:0 mapping:ffff8881da114000 index:0x0 compound_mapcount: 0 [ 54.685726][ T1726] flags: 0x200000000010200(slab|head) [ 54.691915][ T1726] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da114000 [ 54.700616][ T1726] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 54.709622][ T1726] page dumped because: kasan: bad access detected [ 54.716925][ T1726] [ 54.719263][ T1726] Memory state around the buggy address: [ 54.725046][ T1726] ffff8881d2c77f00: fb fb fb fb fb fb fc fc fc fc fb fb fb fb fb fb [ 54.733148][ T1726] ffff8881d2c77f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc [ 54.741442][ T1726] >ffff8881d2c78000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.749482][ T1726] ^ [ 54.754444][ T1726] ffff8881d2c78080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.762793][ T1726] ffff8881d2c78100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.771216][ T1726] ================================================================== [ 54.779510][ T1726] Disabling lock debugging due to kernel taint [ 54.785940][ T1726] Kernel panic - not syncing: panic_on_warn set ... [ 54.792654][ T1726] CPU: 0 PID: 1726 Comm: syz-executor037 Tainted: G B 5.3.0-rc2+ #25 [ 54.802089][ T1726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.812390][ T1726] Call Trace: [ 54.815678][ T1726] dump_stack+0xca/0x13e [ 54.819994][ T1726] panic+0x2a3/0x6da [ 54.824006][ T1726] ? add_taint.cold+0x16/0x16 [ 54.829089][ T1726] ? retint_kernel+0x10/0x10 [ 54.833674][ T1726] ? trace_hardirqs_on+0x55/0x1e0 [ 54.838850][ T1726] ? hidraw_ioctl+0x5e1/0xae0 [ 54.843614][ T1726] end_report+0x43/0x49 [ 54.848018][ T1726] ? hidraw_ioctl+0x5e1/0xae0 [ 54.853081][ T1726] __kasan_report.cold+0xd/0x33 [ 54.858072][ T1726] ? hidraw_ioctl+0x5e1/0xae0 [ 54.863240][ T1726] kasan_report+0xe/0x12 [ 54.868098][ T1726] hidraw_ioctl+0x5e1/0xae0 [ 54.872606][ T1726] ? hidraw_disconnect+0x2c0/0x2c0 [ 54.877732][ T1726] ? lock_acquire+0x127/0x320 [ 54.882403][ T1726] ? debug_object_free+0x52/0x340 [ 54.887793][ T1726] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 54.893680][ T1726] ? hidraw_disconnect+0x2c0/0x2c0 [ 54.899237][ T1726] do_vfs_ioctl+0xd2d/0x1330 [ 54.903809][ T1726] ? ioctl_preallocate+0x200/0x200 [ 54.908904][ T1726] ? hrtimer_nanosleep+0x28a/0x510 [ 54.914161][ T1726] ? nanosleep_copyout+0x100/0x100 [ 54.919417][ T1726] ? _copy_from_user+0x123/0x190 [ 54.924567][ T1726] ? clock_was_set_work+0x20/0x20 [ 54.929580][ T1726] ? put_old_itimerspec32+0x1d0/0x1d0 [ 54.935073][ T1726] ksys_ioctl+0x9b/0xc0 [ 54.939743][ T1726] __x64_sys_ioctl+0x6f/0xb0 [ 54.944595][ T1726] ? lockdep_hardirqs_on+0x379/0x580 [ 54.950314][ T1726] do_syscall_64+0xb7/0x580 [ 54.955083][ T1726] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 54.961249][ T1726] RIP: 0033:0x4456b9 [ 54.965782][ T1726] Code: e8 5c ad 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 9b cd fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 54.986535][ T1726] RSP: 002b:00007ffe9dc59908 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 54.996239][ T1726] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004456b9 [ 55.004423][ T1726] RDX: 00000000200003c0 RSI: 0000000090044802 RDI: 0000000000000003 [ 55.012481][ T1726] RBP: 000000000000c8e8 R08: 00000000004002e0 R09: 00000000004002e0 [ 55.021086][ T1726] R10: 000000000000000b R11: 0000000000000246 R12: 00000000004028e0 [ 55.029618][ T1726] R13: 0000000000402970 R14: 0000000000000000 R15: 0000000000000000 [ 55.038883][ T1726] Kernel Offset: disabled [ 55.043379][ T1726] Rebooting in 86400 seconds..