[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 65.145546][ T26] audit: type=1800 audit(1570417290.599:25): pid=9058 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 65.193539][ T26] audit: type=1800 audit(1570417290.599:26): pid=9058 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 65.238894][ T26] audit: type=1800 audit(1570417290.599:27): pid=9058 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] 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 '10.128.1.40' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 102.839785][T18258] ================================================================== [ 102.848129][T18258] BUG: KASAN: use-after-free in bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 102.856011][T18258] Read of size 8 at addr ffff8880948217c8 by task syz-executor436/18258 [ 102.864336][T18258] [ 102.866684][T18258] CPU: 0 PID: 18258 Comm: syz-executor436 Not tainted 5.4.0-rc1+ #0 [ 102.874647][T18258] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.884684][T18258] Call Trace: [ 102.887969][T18258] dump_stack+0x172/0x1f0 [ 102.892288][T18258] ? bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 102.897823][T18258] print_address_description.constprop.0.cold+0xd4/0x30b [ 102.904826][T18258] ? bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 102.910356][T18258] ? bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 102.915886][T18258] __kasan_report.cold+0x1b/0x41 [ 102.920808][T18258] ? bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 102.926344][T18258] kasan_report+0x12/0x20 [ 102.930660][T18258] __asan_report_load8_noabort+0x14/0x20 [ 102.936278][T18258] bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 102.941637][T18258] ? rcu_dynticks_curr_cpu_in_eqs+0x1/0xb0 [ 102.947436][T18258] is_bpf_text_address+0x78/0x170 [ 102.952503][T18258] kernel_text_address+0x73/0xf0 [ 102.957434][T18258] __kernel_text_address+0xd/0x40 [ 102.962443][T18258] unwind_get_return_address+0x61/0xa0 [ 102.967885][T18258] ? profile_setup.cold+0xbb/0xbb [ 102.972892][T18258] arch_stack_walk+0x97/0xf0 [ 102.977477][T18258] stack_trace_save+0xac/0xe0 [ 102.982161][T18258] ? stack_trace_consume_entry+0x190/0x190 [ 102.987953][T18258] ? __kasan_check_read+0x11/0x20 [ 102.992960][T18258] ? mark_lock+0xc2/0x1220 [ 102.997361][T18258] save_stack+0x23/0x90 [ 103.001498][T18258] ? save_stack+0x23/0x90 [ 103.005825][T18258] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 103.011614][T18258] ? kasan_kmalloc+0x9/0x10 [ 103.016101][T18258] ? kmem_cache_alloc_trace+0x158/0x790 [ 103.021625][T18258] ? bpf_check+0xd8/0x99c0 [ 103.026022][T18258] ? bpf_prog_load+0xe68/0x1660 [ 103.030855][T18258] ? __do_sys_bpf+0xa44/0x3350 [ 103.035601][T18258] ? __x64_sys_bpf+0x73/0xb0 [ 103.040175][T18258] ? do_syscall_64+0xfa/0x760 [ 103.044849][T18258] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.050901][T18258] ? __kasan_check_read+0x11/0x20 [ 103.055910][T18258] ? __lock_acquire+0x16f2/0x4a00 [ 103.060919][T18258] ? __kasan_check_read+0x11/0x20 [ 103.065925][T18258] ? __lock_acquire+0x16f2/0x4a00 [ 103.070933][T18258] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 103.076552][T18258] ? find_held_lock+0x35/0x130 [ 103.081302][T18258] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 103.086924][T18258] ? kasan_unpoison_shadow+0x35/0x50 [ 103.092191][T18258] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 103.097821][T18258] kasan_kmalloc+0x9/0x10 [ 103.102136][T18258] kmem_cache_alloc_trace+0x158/0x790 [ 103.107502][T18258] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 103.113209][T18258] ? ktime_get+0x202/0x300 [ 103.117624][T18258] bpf_check+0xd8/0x99c0 [ 103.121867][T18258] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 103.127835][T18258] ? find_next_bit+0x107/0x130 [ 103.132585][T18258] ? bpf_prog_load+0xdce/0x1660 [ 103.137421][T18258] ? find_held_lock+0x35/0x130 [ 103.142169][T18258] ? bpf_prog_load+0xdce/0x1660 [ 103.147004][T18258] ? do_check+0x8a30/0x8a30 [ 103.151488][T18258] ? lock_downgrade+0x920/0x920 [ 103.156326][T18258] ? ktime_get_with_offset+0x13a/0x360 [ 103.161765][T18258] ? bpf_prog_load+0xdce/0x1660 [ 103.166595][T18258] ? ktime_get_with_offset+0x13a/0x360 [ 103.172038][T18258] ? lockdep_hardirqs_on+0x421/0x5e0 [ 103.177329][T18258] ? trace_hardirqs_on+0x67/0x240 [ 103.182352][T18258] ? memset+0x32/0x40 [ 103.186321][T18258] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 103.192543][T18258] ? bpf_obj_name_cpy+0x13f/0x190 [ 103.197553][T18258] bpf_prog_load+0xe68/0x1660 [ 103.202217][T18258] ? bpf_prog_new_fd+0x60/0x60 [ 103.206969][T18258] ? lock_downgrade+0x920/0x920 [ 103.211818][T18258] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 103.218041][T18258] ? security_bpf+0x8b/0xc0 [ 103.222529][T18258] __do_sys_bpf+0xa44/0x3350 [ 103.227107][T18258] ? bpf_prog_load+0x1660/0x1660 [ 103.232028][T18258] ? lockdep_hardirqs_on+0x421/0x5e0 [ 103.237295][T18258] ? retint_kernel+0x2b/0x2b [ 103.241867][T18258] ? trace_hardirqs_on_caller+0x6a/0x240 [ 103.247483][T18258] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.253708][T18258] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 103.259988][T18258] ? debug_smp_processor_id+0x3c/0x214 [ 103.265453][T18258] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 103.271593][T18258] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 103.277134][T18258] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 103.282608][T18258] ? do_syscall_64+0x26/0x760 [ 103.287275][T18258] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.293322][T18258] ? do_syscall_64+0x26/0x760 [ 103.297992][T18258] __x64_sys_bpf+0x73/0xb0 [ 103.302397][T18258] do_syscall_64+0xfa/0x760 [ 103.306886][T18258] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.312762][T18258] RIP: 0033:0x446949 [ 103.316645][T18258] Code: e8 0c e8 ff ff 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 103.336235][T18258] RSP: 002b:00007f134f31edb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 103.344645][T18258] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446949 [ 103.352665][T18258] RDX: 0000000000000070 RSI: 0000000020000440 RDI: 0000000000000005 [ 103.360653][T18258] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 103.368678][T18258] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 103.376653][T18258] R13: 00007ffd29fc3fff R14: 00007f134f31f9c0 R15: 000000000000002d [ 103.384715][T18258] [ 103.387028][T18258] Allocated by task 18255: [ 103.391436][T18258] save_stack+0x23/0x90 [ 103.395577][T18258] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 103.401204][T18258] kasan_kmalloc+0x9/0x10 [ 103.405521][T18258] kmem_cache_alloc_trace+0x158/0x790 [ 103.410887][T18258] bpf_prog_alloc_no_stats+0xe6/0x2b0 [ 103.416242][T18258] bpf_check+0x6b3d/0x99c0 [ 103.420639][T18258] bpf_prog_load+0xe68/0x1660 [ 103.425315][T18258] __do_sys_bpf+0xa44/0x3350 [ 103.429890][T18258] __x64_sys_bpf+0x73/0xb0 [ 103.434345][T18258] do_syscall_64+0xfa/0x760 [ 103.438850][T18258] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.444732][T18258] [ 103.447044][T18258] Freed by task 3233: [ 103.451066][T18258] save_stack+0x23/0x90 [ 103.455284][T18258] __kasan_slab_free+0x102/0x150 [ 103.460212][T18258] kasan_slab_free+0xe/0x10 [ 103.464695][T18258] kfree+0x10a/0x2c0 [ 103.468576][T18258] __bpf_prog_free+0x87/0xc0 [ 103.473149][T18258] bpf_jit_free+0x64/0x1b0 [ 103.477563][T18258] bpf_prog_free_deferred+0x1a6/0x350 [ 103.482922][T18258] process_one_work+0x9af/0x1740 [ 103.487855][T18258] worker_thread+0x98/0xe40 [ 103.492340][T18258] kthread+0x361/0x430 [ 103.496399][T18258] ret_from_fork+0x24/0x30 [ 103.500803][T18258] [ 103.503118][T18258] The buggy address belongs to the object at ffff888094821780 [ 103.503118][T18258] which belongs to the cache kmalloc-512 of size 512 [ 103.517169][T18258] The buggy address is located 72 bytes inside of [ 103.517169][T18258] 512-byte region [ffff888094821780, ffff888094821980) [ 103.530354][T18258] The buggy address belongs to the page: [ 103.535971][T18258] page:ffffea0002520840 refcount:1 mapcount:0 mapping:ffff8880aa400a80 index:0x0 [ 103.545057][T18258] flags: 0x1fffc0000000200(slab) [ 103.549997][T18258] raw: 01fffc0000000200 ffffea0002a56b88 ffffea0002a5f048 ffff8880aa400a80 [ 103.558564][T18258] raw: 0000000000000000 ffff888094821000 0000000100000006 0000000000000000 [ 103.567124][T18258] page dumped because: kasan: bad access detected [ 103.573524][T18258] [ 103.575850][T18258] Memory state around the buggy address: [ 103.581464][T18258] ffff888094821680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program executing program executing program executing program [ 103.589657][T18258] ffff888094821700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 103.597865][T18258] >ffff888094821780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 103.606102][T18258] ^ [ 103.612753][T18258] ffff888094821800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 103.620852][T18258] ffff888094821880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 103.628936][T18258] ================================================================== [ 103.636976][T18258] Disabling lock debugging due to kernel taint executing program executing program [ 103.686599][T18258] Kernel panic - not syncing: panic_on_warn set ... [ 103.693278][T18258] CPU: 1 PID: 18258 Comm: syz-executor436 Tainted: G B 5.4.0-rc1+ #0 [ 103.702625][T18258] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 103.712692][T18258] Call Trace: [ 103.715975][T18258] dump_stack+0x172/0x1f0 [ 103.720382][T18258] panic+0x2dc/0x755 [ 103.724256][T18258] ? add_taint.cold+0x16/0x16 [ 103.728915][T18258] ? bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 103.734443][T18258] ? preempt_schedule+0x4b/0x60 [ 103.739366][T18258] ? ___preempt_schedule+0x16/0x20 [ 103.744458][T18258] ? trace_hardirqs_on+0x5e/0x240 [ 103.749473][T18258] ? bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 103.755000][T18258] end_report+0x47/0x4f [ 103.759137][T18258] ? bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 103.764710][T18258] __kasan_report.cold+0xe/0x41 [ 103.769568][T18258] ? bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 103.775101][T18258] kasan_report+0x12/0x20 [ 103.779436][T18258] __asan_report_load8_noabort+0x14/0x20 [ 103.785049][T18258] bpf_prog_kallsyms_find+0x2a9/0x2c0 [ 103.790555][T18258] ? rcu_dynticks_curr_cpu_in_eqs+0x1/0xb0 [ 103.796377][T18258] is_bpf_text_address+0x78/0x170 [ 103.801392][T18258] kernel_text_address+0x73/0xf0 [ 103.806314][T18258] __kernel_text_address+0xd/0x40 [ 103.811324][T18258] unwind_get_return_address+0x61/0xa0 [ 103.816775][T18258] ? profile_setup.cold+0xbb/0xbb [ 103.821802][T18258] arch_stack_walk+0x97/0xf0 [ 103.826540][T18258] stack_trace_save+0xac/0xe0 [ 103.831209][T18258] ? stack_trace_consume_entry+0x190/0x190 [ 103.837038][T18258] ? __kasan_check_read+0x11/0x20 [ 103.842227][T18258] ? mark_lock+0xc2/0x1220 [ 103.846636][T18258] save_stack+0x23/0x90 [ 103.850771][T18258] ? save_stack+0x23/0x90 [ 103.855082][T18258] ? __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 103.860866][T18258] ? kasan_kmalloc+0x9/0x10 [ 103.865351][T18258] ? kmem_cache_alloc_trace+0x158/0x790 [ 103.870931][T18258] ? bpf_check+0xd8/0x99c0 [ 103.875347][T18258] ? bpf_prog_load+0xe68/0x1660 [ 103.880229][T18258] ? __do_sys_bpf+0xa44/0x3350 [ 103.885011][T18258] ? __x64_sys_bpf+0x73/0xb0 [ 103.889748][T18258] ? do_syscall_64+0xfa/0x760 [ 103.894949][T18258] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 103.901015][T18258] ? __kasan_check_read+0x11/0x20 [ 103.906021][T18258] ? __lock_acquire+0x16f2/0x4a00 [ 103.911025][T18258] ? __kasan_check_read+0x11/0x20 [ 103.916051][T18258] ? __lock_acquire+0x16f2/0x4a00 [ 103.921057][T18258] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 103.926670][T18258] ? find_held_lock+0x35/0x130 [ 103.931416][T18258] ? fs_reclaim_acquire.part.0+0x30/0x30 [ 103.937293][T18258] ? kasan_unpoison_shadow+0x35/0x50 [ 103.942557][T18258] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 103.948214][T18258] kasan_kmalloc+0x9/0x10 [ 103.952739][T18258] kmem_cache_alloc_trace+0x158/0x790 [ 103.958142][T18258] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 103.963847][T18258] ? ktime_get+0x202/0x300 [ 103.968264][T18258] bpf_check+0xd8/0x99c0 [ 103.972502][T18258] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 103.978466][T18258] ? find_next_bit+0x107/0x130 [ 103.983215][T18258] ? bpf_prog_load+0xdce/0x1660 [ 103.988047][T18258] ? find_held_lock+0x35/0x130 [ 103.992791][T18258] ? bpf_prog_load+0xdce/0x1660 [ 103.997628][T18258] ? do_check+0x8a30/0x8a30 [ 104.002110][T18258] ? lock_downgrade+0x920/0x920 [ 104.006942][T18258] ? ktime_get_with_offset+0x13a/0x360 [ 104.012381][T18258] ? bpf_prog_load+0xdce/0x1660 [ 104.017212][T18258] ? ktime_get_with_offset+0x13a/0x360 [ 104.022651][T18258] ? lockdep_hardirqs_on+0x421/0x5e0 [ 104.027916][T18258] ? trace_hardirqs_on+0x67/0x240 [ 104.032920][T18258] ? memset+0x32/0x40 [ 104.036886][T18258] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 104.043105][T18258] ? bpf_obj_name_cpy+0x13f/0x190 [ 104.048112][T18258] bpf_prog_load+0xe68/0x1660 [ 104.052771][T18258] ? bpf_prog_new_fd+0x60/0x60 [ 104.057531][T18258] ? lock_downgrade+0x920/0x920 [ 104.062370][T18258] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 104.068594][T18258] ? security_bpf+0x8b/0xc0 [ 104.073078][T18258] __do_sys_bpf+0xa44/0x3350 [ 104.077650][T18258] ? bpf_prog_load+0x1660/0x1660 [ 104.082576][T18258] ? lockdep_hardirqs_on+0x421/0x5e0 [ 104.088001][T18258] ? retint_kernel+0x2b/0x2b [ 104.092598][T18258] ? trace_hardirqs_on_caller+0x6a/0x240 [ 104.098215][T18258] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 104.104442][T18258] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 104.110665][T18258] ? debug_smp_processor_id+0x3c/0x214 [ 104.116199][T18258] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 104.122335][T18258] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 104.127867][T18258] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 104.133308][T18258] ? do_syscall_64+0x26/0x760 [ 104.137967][T18258] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 104.144028][T18258] ? do_syscall_64+0x26/0x760 [ 104.148706][T18258] __x64_sys_bpf+0x73/0xb0 [ 104.153105][T18258] do_syscall_64+0xfa/0x760 [ 104.157592][T18258] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 104.163553][T18258] RIP: 0033:0x446949 [ 104.167439][T18258] Code: e8 0c e8 ff ff 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 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 104.187021][T18258] RSP: 002b:00007f134f31edb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 104.195410][T18258] RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446949 [ 104.203392][T18258] RDX: 0000000000000070 RSI: 0000000020000440 RDI: 0000000000000005 [ 104.211347][T18258] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 104.219472][T18258] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 104.227461][T18258] R13: 00007ffd29fc3fff R14: 00007f134f31f9c0 R15: 000000000000002d [ 104.237015][T18258] Kernel Offset: disabled [ 104.241348][T18258] Rebooting in 86400 seconds..