Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.154' (ECDSA) to the list of known hosts. 2021/05/01 18:17:07 fuzzer started 2021/05/01 18:17:08 dialing manager at 10.128.0.169:44661 2021/05/01 18:17:08 syscalls: 3571 2021/05/01 18:17:08 code coverage: enabled 2021/05/01 18:17:08 comparison tracing: enabled 2021/05/01 18:17:08 extra coverage: enabled 2021/05/01 18:17:08 setuid sandbox: enabled 2021/05/01 18:17:08 namespace sandbox: enabled 2021/05/01 18:17:08 Android sandbox: /sys/fs/selinux/policy does not exist 2021/05/01 18:17:08 fault injection: enabled 2021/05/01 18:17:08 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2021/05/01 18:17:08 net packet injection: enabled 2021/05/01 18:17:08 net device setup: enabled 2021/05/01 18:17:08 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 2021/05/01 18:17:08 devlink PCI setup: PCI device 0000:00:10.0 is not available 2021/05/01 18:17:08 USB emulation: enabled 2021/05/01 18:17:08 hci packet injection: enabled 2021/05/01 18:17:08 wifi device emulation: enabled 2021/05/01 18:17:08 802.15.4 emulation: enabled 2021/05/01 18:17:08 fetching corpus: 0, signal 0/2000 (executing program) 2021/05/01 18:17:09 fetching corpus: 50, signal 55693/59428 (executing program) 2021/05/01 18:17:09 fetching corpus: 100, signal 84822/90177 (executing program) syzkaller login: [ 71.125111][ T3256] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.131725][ T3256] ieee802154 phy1 wpan1: encryption failed: -22 2021/05/01 18:17:09 fetching corpus: 150, signal 104021/110965 (executing program) 2021/05/01 18:17:09 fetching corpus: 200, signal 118072/126551 (executing program) 2021/05/01 18:17:10 fetching corpus: 250, signal 135788/145692 (executing program) 2021/05/01 18:17:10 fetching corpus: 300, signal 147585/158897 (executing program) [ 72.552251][ T8458] ================================================================== [ 72.560528][ T8458] BUG: KASAN: use-after-free in __skb_datagram_iter+0x6b8/0x770 [ 72.568170][ T8458] Read of size 4 at addr ffff8880289d8004 by task syz-fuzzer/8458 [ 72.575963][ T8458] [ 72.578273][ T8458] CPU: 1 PID: 8458 Comm: syz-fuzzer Not tainted 5.12.0-rc8-next-20210423-syzkaller #0 [ 72.587804][ T8458] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.597886][ T8458] Call Trace: [ 72.601174][ T8458] dump_stack+0x141/0x1d7 [ 72.605544][ T8458] ? __skb_datagram_iter+0x6b8/0x770 [ 72.610840][ T8458] print_address_description.constprop.0.cold+0x5b/0x2f8 [ 72.617882][ T8458] ? __skb_datagram_iter+0x6b8/0x770 [ 72.623177][ T8458] ? __skb_datagram_iter+0x6b8/0x770 [ 72.628474][ T8458] kasan_report.cold+0x7c/0xd8 [ 72.633257][ T8458] ? __skb_datagram_iter+0x6b8/0x770 [ 72.638556][ T8458] __skb_datagram_iter+0x6b8/0x770 [ 72.643679][ T8458] ? zerocopy_sg_from_iter+0x110/0x110 [ 72.649155][ T8458] skb_copy_datagram_iter+0x40/0x50 [ 72.654369][ T8458] tcp_recvmsg_locked+0x1048/0x22f0 [ 72.659603][ T8458] ? tcp_splice_read+0x8b0/0x8b0 [ 72.664560][ T8458] ? mark_held_locks+0x9f/0xe0 [ 72.669343][ T8458] ? __local_bh_enable_ip+0xa0/0x120 [ 72.674645][ T8458] tcp_recvmsg+0x134/0x550 [ 72.679081][ T8458] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 72.684474][ T8458] ? aa_sk_perm+0x311/0xab0 [ 72.689174][ T8458] inet_recvmsg+0x11b/0x5e0 [ 72.693698][ T8458] ? inet_sendpage+0x140/0x140 [ 72.698485][ T8458] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.704761][ T8458] ? security_socket_recvmsg+0x8f/0xc0 [ 72.710248][ T8458] sock_read_iter+0x33c/0x470 [ 72.714943][ T8458] ? ____sys_recvmsg+0x600/0x600 [ 72.719903][ T8458] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.726164][ T8458] ? fsnotify+0xa58/0x1060 [ 72.730595][ T8458] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 72.736855][ T8458] new_sync_read+0x5b7/0x6e0 [ 72.741456][ T8458] ? ksys_lseek+0x1b0/0x1b0 [ 72.745982][ T8458] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 72.752008][ T8458] vfs_read+0x35c/0x570 [ 72.756190][ T8458] ksys_read+0x1ee/0x250 [ 72.760440][ T8458] ? vfs_write+0xa40/0xa40 [ 72.764869][ T8458] ? syscall_enter_from_user_mode+0x27/0x70 [ 72.770791][ T8458] do_syscall_64+0x3a/0xb0 [ 72.775222][ T8458] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 72.781124][ T8458] RIP: 0033:0x4af19b [ 72.785027][ T8458] Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 72.804651][ T8458] RSP: 002b:000000c000207828 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 72.813085][ T8458] RAX: ffffffffffffffda RBX: 000000c00001c000 RCX: 00000000004af19b [ 72.821081][ T8458] RDX: 0000000000001000 RSI: 000000c00028e000 RDI: 0000000000000006 [ 72.829171][ T8458] RBP: 000000c000207878 R08: 0000000000000001 R09: 0000000000000002 [ 72.837172][ T8458] R10: 0000000000005625 R11: 0000000000000212 R12: ffffffffffffffff [ 72.845156][ T8458] R13: 0000000000002000 R14: 0000000000000008 R15: 0000000000000008 [ 72.853175][ T8458] [ 72.855508][ T8458] Allocated by task 4857: [ 72.859836][ T8458] kasan_save_stack+0x1b/0x40 [ 72.864612][ T8458] __kasan_slab_alloc+0x84/0xa0 [ 72.869474][ T8458] kmem_cache_alloc+0x219/0x3a0 [ 72.874352][ T8458] getname_flags.part.0+0x50/0x4f0 [ 72.879498][ T8458] user_path_at_empty+0xa1/0x100 [ 72.884452][ T8458] do_faccessat+0x127/0x850 [ 72.888976][ T8458] do_syscall_64+0x3a/0xb0 [ 72.893420][ T8458] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 72.899383][ T8458] [ 72.901707][ T8458] Freed by task 5966: [ 72.905701][ T8458] kasan_save_stack+0x1b/0x40 [ 72.910396][ T8458] kasan_set_track+0x1c/0x30 [ 72.915009][ T8458] kasan_set_free_info+0x20/0x30 [ 72.919969][ T8458] __kasan_slab_free+0xfb/0x130 [ 72.924827][ T8458] slab_free_freelist_hook+0xdf/0x240 [ 72.930322][ T8458] kmem_cache_free+0x97/0x750 [ 72.935100][ T8458] putname+0xe1/0x120 [ 72.939097][ T8458] filename_lookup+0x3c3/0x570 [ 72.943884][ T8458] do_faccessat+0x127/0x850 [ 72.948409][ T8458] do_syscall_64+0x3a/0xb0 [ 72.952837][ T8458] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 72.958742][ T8458] [ 72.961066][ T8458] The buggy address belongs to the object at ffff8880289d8000 [ 72.961066][ T8458] which belongs to the cache names_cache of size 4096 [ 72.975212][ T8458] The buggy address is located 4 bytes inside of [ 72.975212][ T8458] 4096-byte region [ffff8880289d8000, ffff8880289d9000) [ 72.988436][ T8458] The buggy address belongs to the page: [ 72.994080][ T8458] page:ffffea0000a27600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x289d8 [ 73.004244][ T8458] head:ffffea0000a27600 order:3 compound_mapcount:0 compound_pincount:0 [ 73.012595][ T8458] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) [ 73.020607][ T8458] raw: 00fff00000010200 dead000000000100 dead000000000122 ffff8880111be280 [ 73.029215][ T8458] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 73.037813][ T8458] page dumped because: kasan: bad access detected [ 73.044237][ T8458] [ 73.046565][ T8458] Memory state around the buggy address: [ 73.052222][ T8458] ffff8880289d7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.060313][ T8458] ffff8880289d7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 73.068390][ T8458] >ffff8880289d8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.076460][ T8458] ^ [ 73.080551][ T8458] ffff8880289d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.088626][ T8458] ffff8880289d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.096693][ T8458] ================================================================== [ 73.104756][ T8458] Disabling lock debugging due to kernel taint [ 73.123542][ T8458] Kernel panic - not syncing: panic_on_warn set ... [ 73.130161][ T8458] CPU: 1 PID: 8458 Comm: syz-fuzzer Tainted: G B 5.12.0-rc8-next-20210423-syzkaller #0 [ 73.141130][ T8458] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.151195][ T8458] Call Trace: [ 73.154483][ T8458] dump_stack+0x141/0x1d7 [ 73.158820][ T8458] panic+0x306/0x73d [ 73.162719][ T8458] ? __warn_printk+0xf3/0xf3 [ 73.167316][ T8458] ? preempt_schedule_common+0x59/0xc0 [ 73.172799][ T8458] ? __skb_datagram_iter+0x6b8/0x770 [ 73.178091][ T8458] ? preempt_schedule_thunk+0x16/0x18 [ 73.183474][ T8458] ? trace_hardirqs_on+0x38/0x1c0 [ 73.188506][ T8458] ? trace_hardirqs_on+0x51/0x1c0 [ 73.193530][ T8458] ? __skb_datagram_iter+0x6b8/0x770 [ 73.198834][ T8458] ? __skb_datagram_iter+0x6b8/0x770 [ 73.204126][ T8458] end_report.cold+0x5a/0x5a [ 73.208751][ T8458] kasan_report.cold+0x6a/0xd8 [ 73.213531][ T8458] ? __skb_datagram_iter+0x6b8/0x770 [ 73.218840][ T8458] __skb_datagram_iter+0x6b8/0x770 [ 73.223965][ T8458] ? zerocopy_sg_from_iter+0x110/0x110 [ 73.229440][ T8458] skb_copy_datagram_iter+0x40/0x50 [ 73.234665][ T8458] tcp_recvmsg_locked+0x1048/0x22f0 [ 73.239889][ T8458] ? tcp_splice_read+0x8b0/0x8b0 [ 73.244832][ T8458] ? mark_held_locks+0x9f/0xe0 [ 73.249629][ T8458] ? __local_bh_enable_ip+0xa0/0x120 [ 73.254921][ T8458] tcp_recvmsg+0x134/0x550 [ 73.259348][ T8458] ? tcp_recvmsg_locked+0x22f0/0x22f0 [ 73.264734][ T8458] ? aa_sk_perm+0x311/0xab0 [ 73.269241][ T8458] inet_recvmsg+0x11b/0x5e0 [ 73.273755][ T8458] ? inet_sendpage+0x140/0x140 [ 73.278619][ T8458] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.284872][ T8458] ? security_socket_recvmsg+0x8f/0xc0 [ 73.290603][ T8458] sock_read_iter+0x33c/0x470 [ 73.295287][ T8458] ? ____sys_recvmsg+0x600/0x600 [ 73.300324][ T8458] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.306574][ T8458] ? fsnotify+0xa58/0x1060 [ 73.311007][ T8458] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 73.317261][ T8458] new_sync_read+0x5b7/0x6e0 [ 73.321914][ T8458] ? ksys_lseek+0x1b0/0x1b0 [ 73.326431][ T8458] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 73.332432][ T8458] vfs_read+0x35c/0x570 [ 73.336598][ T8458] ksys_read+0x1ee/0x250 [ 73.340846][ T8458] ? vfs_write+0xa40/0xa40 [ 73.345265][ T8458] ? syscall_enter_from_user_mode+0x27/0x70 [ 73.351181][ T8458] do_syscall_64+0x3a/0xb0 [ 73.355606][ T8458] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 73.361512][ T8458] RIP: 0033:0x4af19b [ 73.365408][ T8458] Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 73.385022][ T8458] RSP: 002b:000000c000207828 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 [ 73.393473][ T8458] RAX: ffffffffffffffda RBX: 000000c00001c000 RCX: 00000000004af19b [ 73.401460][ T8458] RDX: 0000000000001000 RSI: 000000c00028e000 RDI: 0000000000000006 [ 73.409431][ T8458] RBP: 000000c000207878 R08: 0000000000000001 R09: 0000000000000002 [ 73.417403][ T8458] R10: 0000000000005625 R11: 0000000000000212 R12: ffffffffffffffff [ 73.425396][ T8458] R13: 0000000000002000 R14: 0000000000000008 R15: 0000000000000008 [ 73.433864][ T8458] Kernel Offset: disabled [ 73.438194][ T8458] Rebooting in 86400 seconds..