[ 44.217223][ T1] R10: 0000555d071ae680 R11: 0000000000000246 R12: 0000555d071ae680 [ 44.225203][ T1] R13: 0000000000000000 R14: 0000000000000017 R15: 00007ffdacb09760 [ OK ] Started Daily apt download activities. [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ 54.352944][ T6725] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6725 [ 54.362420][ T6725] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 54.368966][ T6725] CPU: 1 PID: 6725 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 [ 54.377318][ T6725] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.387353][ T6725] Call Trace: [ 54.390641][ T6725] dump_stack+0x188/0x20d [ 54.394971][ T6725] debug_smp_processor_id.cold+0x88/0x9b [ 54.400586][ T6725] ext4_mb_new_blocks+0xa77/0x3b30 [ 54.405680][ T6725] ? ext4_ext_search_right+0x2ca/0xb20 [ 54.411114][ T6725] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 54.416812][ T6725] ext4_ext_map_blocks+0x2044/0x3410 [ 54.422783][ T6725] ? ext4_ext_release+0x10/0x10 [ 54.427619][ T6725] ? __down_timeout+0x2d0/0x2d0 [ 54.432702][ T6725] ? ext4_es_lookup_extent+0x41d/0xd30 [ 54.438142][ T6725] ext4_map_blocks+0x4cb/0x1640 [ 54.442981][ T6725] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 54.448156][ T6725] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 54.453677][ T6725] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 54.459629][ T6725] ? prandom_u32_state+0xe/0x170 [ 54.464541][ T6725] ? __brelse+0x84/0xa0 [ 54.468673][ T6725] ? __ext4_new_inode+0x144/0x57c0 [ 54.473876][ T6725] ext4_getblk+0xad/0x520 [ 54.478184][ T6725] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 54.483907][ T6725] ? ext4_free_inode+0x17e0/0x17e0 [ 54.489001][ T6725] ext4_bread+0x7c/0x380 [ 54.493231][ T6725] ? ext4_getblk+0x520/0x520 [ 54.497806][ T6725] ? dqget+0xff0/0xff0 [ 54.502029][ T6725] ext4_append+0x153/0x360 [ 54.506437][ T6725] ext4_mkdir+0x5e0/0xdf0 [ 54.510754][ T6725] ? ext4_rmdir+0xde0/0xde0 [ 54.515245][ T6725] ? security_inode_permission+0xc4/0xf0 [ 54.520855][ T6725] vfs_mkdir+0x419/0x690 [ 54.525096][ T6725] do_mkdirat+0x21e/0x280 [ 54.529410][ T6725] ? __ia32_sys_mknod+0xb0/0xb0 [ 54.534474][ T6725] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 54.540467][ T6725] ? do_syscall_64+0x21/0x7d0 [ 54.545235][ T6725] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 54.551223][ T6725] do_syscall_64+0xf6/0x7d0 [ 54.555727][ T6725] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 54.561711][ T6725] RIP: 0033:0x7f5c29eff687 [ 54.566122][ T6725] Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 [ 54.585703][ T6725] RSP: 002b:00007ffd998ee118 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 54.594184][ T6725] RAX: ffffffffffffffda RBX: 000055bae4f22985 RCX: 00007f5c29eff687 [ 54.602496][ T6725] RDX: 00007ffd998edfe0 RSI: 00000000000001ed RDI: 000055bae4f22985 [ 54.610469][ T6725] RBP: 00007f5c29eff680 R08: 0000000000000100 R09: 0000000000000000 [ 54.618953][ T6725] R10: 000055bae4f22980 R11: 0000000000000246 R12: 00000000000001ed [ 54.626947][ T6725] R13: 00007ffd998ee2a0 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.66' (ECDSA) to the list of known hosts. 2020/06/13 22:38:33 fuzzer started 2020/06/13 22:38:33 connecting to host at 10.128.0.26:37983 2020/06/13 22:38:33 checking machine... 2020/06/13 22:38:33 checking revisions... 2020/06/13 22:38:33 testing simple program... syzkaller login: [ 59.443191][ T6797] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6797 [ 59.452420][ T6797] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.458493][ T6797] CPU: 1 PID: 6797 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 59.466383][ T6797] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.476432][ T6797] Call Trace: [ 59.479708][ T6797] dump_stack+0x188/0x20d [ 59.484020][ T6797] debug_smp_processor_id.cold+0x88/0x9b [ 59.489630][ T6797] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.494729][ T6797] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.500618][ T6797] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.506317][ T6797] ext4_ext_map_blocks+0x2044/0x3410 [ 59.511596][ T6797] ? ext4_ext_release+0x10/0x10 [ 59.516432][ T6797] ? __down_timeout+0x2d0/0x2d0 [ 59.521259][ T6797] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.526730][ T6797] ext4_map_blocks+0x4cb/0x1640 [ 59.531579][ T6797] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.536775][ T6797] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.542363][ T6797] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.548329][ T6797] ? prandom_u32_state+0xe/0x170 [ 59.553252][ T6797] ? __brelse+0x84/0xa0 [ 59.557388][ T6797] ? __ext4_new_inode+0x144/0x57c0 [ 59.562505][ T6797] ext4_getblk+0xad/0x520 [ 59.566817][ T6797] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.572516][ T6797] ? ext4_free_inode+0x17e0/0x17e0 [ 59.577607][ T6797] ext4_bread+0x7c/0x380 [ 59.581840][ T6797] ? ext4_getblk+0x520/0x520 [ 59.586408][ T6797] ? dqget+0xff0/0xff0 [ 59.590470][ T6797] ext4_append+0x153/0x360 [ 59.594880][ T6797] ext4_mkdir+0x5e0/0xdf0 [ 59.599210][ T6797] ? ext4_rmdir+0xde0/0xde0 [ 59.603691][ T6797] ? security_inode_permission+0xc4/0xf0 [ 59.609319][ T6797] vfs_mkdir+0x419/0x690 [ 59.613537][ T6797] do_mkdirat+0x21e/0x280 [ 59.617844][ T6797] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.622668][ T6797] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.628626][ T6797] ? do_syscall_64+0x21/0x7d0 [ 59.633279][ T6797] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.639237][ T6797] do_syscall_64+0xf6/0x7d0 [ 59.643719][ T6797] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.649599][ T6797] RIP: 0033:0x4b02a0 [ 59.653467][ T6797] Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 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 [ 59.673057][ T6797] RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 59.681458][ T6797] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 59.689410][ T6797] RDX: 00000000000001c0 RSI: 000000c000026a60 RDI: ffffffffffffff9c [ 59.697376][ T6797] RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000 [ 59.705349][ T6797] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 59.713295][ T6797] R13: 0000000000000054 R14: 0000000000000053 R15: 0000000000000100 [ 59.733091][ T6801] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6801 [ 59.742560][ T6801] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 59.748538][ T6801] CPU: 1 PID: 6801 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.756798][ T6801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.766851][ T6801] Call Trace: [ 59.770150][ T6801] dump_stack+0x188/0x20d [ 59.774495][ T6801] debug_smp_processor_id.cold+0x88/0x9b [ 59.780138][ T6801] ext4_mb_new_blocks+0xa77/0x3b30 [ 59.785272][ T6801] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.790730][ T6801] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.796456][ T6801] ext4_ext_map_blocks+0x2044/0x3410 [ 59.801749][ T6801] ? ext4_ext_release+0x10/0x10 [ 59.806704][ T6801] ? __down_timeout+0x2d0/0x2d0 [ 59.811544][ T6801] ? ext4_es_lookup_extent+0x41d/0xd30 [ 59.816985][ T6801] ext4_map_blocks+0x4cb/0x1640 [ 59.821817][ T6801] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.826993][ T6801] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.832514][ T6801] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.838475][ T6801] ? prandom_u32_state+0xe/0x170 [ 59.843399][ T6801] ? __brelse+0x84/0xa0 [ 59.847534][ T6801] ? __ext4_new_inode+0x144/0x57c0 [ 59.852624][ T6801] ext4_getblk+0xad/0x520 [ 59.856941][ T6801] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.862638][ T6801] ? ext4_free_inode+0x17e0/0x17e0 [ 59.867724][ T6801] ext4_bread+0x7c/0x380 [ 59.871944][ T6801] ? ext4_getblk+0x520/0x520 [ 59.876509][ T6801] ? dqget+0xff0/0xff0 [ 59.880568][ T6801] ext4_append+0x153/0x360 [ 59.884964][ T6801] ext4_mkdir+0x5e0/0xdf0 [ 59.889272][ T6801] ? ext4_rmdir+0xde0/0xde0 [ 59.893764][ T6801] ? security_inode_permission+0xc4/0xf0 [ 59.899385][ T6801] vfs_mkdir+0x419/0x690 [ 59.903615][ T6801] do_mkdirat+0x21e/0x280 [ 59.907935][ T6801] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.912761][ T6801] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.918717][ T6801] ? do_syscall_64+0x21/0x7d0 [ 59.923715][ T6801] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.929673][ T6801] do_syscall_64+0xf6/0x7d0 [ 59.934159][ T6801] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 59.940035][ T6801] RIP: 0033:0x45bee7 [ 59.943925][ T6801] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 59.963516][ T6801] RSP: 002b:00007ffcf9253ea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.971927][ T6801] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 59.980858][ T6801] RDX: 0000000000000003 RSI: 00000000000001c0 RDI: 00007ffcf9254080 [ 59.988816][ T6801] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000003540 [ 59.996763][ T6801] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.004721][ T6801] R13: 00007ffcf9254080 R14: 8421084210842109 R15: 00007ffcf925408c [ 60.087243][ T6802] IPVS: ftp: loaded support on port[0] = 21 [ 60.125567][ T6802] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6802 [ 60.135774][ T6802] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 60.141646][ T6802] CPU: 1 PID: 6802 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.149855][ T6802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.159905][ T6802] Call Trace: [ 60.163177][ T6802] dump_stack+0x188/0x20d [ 60.167505][ T6802] debug_smp_processor_id.cold+0x88/0x9b [ 60.173127][ T6802] ext4_mb_new_blocks+0xa77/0x3b30 [ 60.178235][ T6802] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.183677][ T6802] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.189377][ T6802] ext4_ext_map_blocks+0x2044/0x3410 [ 60.194645][ T6802] ? ext4_ext_release+0x10/0x10 [ 60.199484][ T6802] ? __down_timeout+0x2d0/0x2d0 [ 60.204317][ T6802] ? ext4_es_lookup_extent+0x41d/0xd30 [ 60.209756][ T6802] ext4_map_blocks+0x4cb/0x1640 [ 60.214622][ T6802] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.219807][ T6802] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.225331][ T6802] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.231300][ T6802] ? prandom_u32_state+0xe/0x170 [ 60.236216][ T6802] ? __brelse+0x84/0xa0 [ 60.240347][ T6802] ? __ext4_new_inode+0x144/0x57c0 [ 60.245440][ T6802] ext4_getblk+0xad/0x520 [ 60.249748][ T6802] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.255456][ T6802] ? ext4_free_inode+0x17e0/0x17e0 [ 60.260900][ T6802] ext4_bread+0x7c/0x380 [ 60.265128][ T6802] ? ext4_getblk+0x520/0x520 [ 60.269722][ T6802] ? dqget+0xff0/0xff0 [ 60.273779][ T6802] ext4_append+0x153/0x360 [ 60.278194][ T6802] ext4_mkdir+0x5e0/0xdf0 [ 60.282516][ T6802] ? ext4_rmdir+0xde0/0xde0 [ 60.287020][ T6802] ? security_inode_permission+0xc4/0xf0 [ 60.292641][ T6802] vfs_mkdir+0x419/0x690 [ 60.296870][ T6802] do_mkdirat+0x21e/0x280 [ 60.301192][ T6802] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.306020][ T6802] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.312000][ T6802] ? do_syscall_64+0x21/0x7d0 [ 60.316655][ T6802] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.322622][ T6802] do_syscall_64+0xf6/0x7d0 [ 60.327108][ T6802] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 60.332972][ T6802] RIP: 0033:0x45bee7 [ 60.336847][ T6802] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.356441][ T6802] RSP: 002b:00007ffcf9253d98 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.364827][ T6802] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 60.372804][ T6802] RDX: 00007ffcf9253de3 RSI: 00000000000001ff RDI: 00007ffcf9253de0 [ 60.380759][ T6802] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 60.388712][ T6802] R10: 0000000000000064 R11: 0000000000000202 R12: 00000000004185d0 [ 60.396673][ T6802] R13: 00007ffcf9253dd0 R14: 0000000000000000 R15: 00007ffcf9253de0 [ 60.453533][ T6802] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6802 [ 60.463009][ T6802] caller is ext4_mb_new_blocks+0xa77/0x3b30 [ 60.469001][ T6802] CPU: 1 PID: 6802 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.477326][ T6802] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.487375][ T6802] Call Trace: [ 60.490669][ T6802] dump_stack+0x188/0x20d [ 60.495003][ T6802] debug_smp_processor_id.cold+0x88/0x9b [ 60.500641][ T6802] ext4_mb_new_blocks+0xa77/0x3b30 [ 60.505766][ T6802] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.511219][ T6802] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.516941][ T6802] ext4_ext_map_blocks+0x2044/0x3410 [ 60.522237][ T6802] ? ext4_ext_release+0x10/0x10 [ 60.527084][ T6802] ? __down_timeout+0x2d0/0x2d0 [ 60.531931][ T6802] ? ext4_es_lookup_extent+0x41d/0xd30 [ 60.537383][ T6802] ext4_map_blocks+0x4cb/0x1640 [ 60.542212][ T6802] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.547385][ T6802] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.552946][ T6802] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.558909][ T6802] ? prandom_u32_state+0xe/0x170 [ 60.563840][ T6802] ? __brelse+0x84/0xa0 [ 60.567982][ T6802] ? __ext4_new_inode+0x144/0x57c0 [ 60.573094][ T6802] ext4_getblk+0xad/0x520 [ 60.577436][ T6802] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.583136][ T6802] ? ext4_free_inode+0x17e0/0x17e0 [ 60.588242][ T6802] ext4_bread+0x7c/0x380 [ 60.592462][ T6802] ? ext4_getblk+0x520/0x520 [ 60.597040][ T6802] ? dqget+0xff0/0xff0 [ 60.601090][ T6802] ext4_append+0x153/0x360 [ 60.605502][ T6802] ext4_mkdir+0x5e0/0xdf0 [ 60.609811][ T6802] ? ext4_rmdir+0xde0/0xde0 [ 60.614301][ T6802] ? security_inode_permission+0xc4/0xf0 [ 60.619915][ T6802] vfs_mkdir+0x419/0x690 [ 60.624147][ T6802] do_mkdirat+0x21e/0x280 [ 60.628459][ T6802] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.633286][ T6802] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.639253][ T6802] ? do_syscall_64+0x21/0x7d0 [ 60.643903][ T6802] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.649861][ T6802] do_syscall_64+0xf6/0x7d0 [ 60.654347][ T6802] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 60.660213][ T6802] RIP: 0033:0x45bee7 [ 60.664084][ T6802] Code: 1f 40 00 b8 5a 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5d c2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 60.683683][ T6802] RSP: 002b:00007ffcf9253d98 EFLAGS: 00000202 ORIG_RAX: 0000000000000053 [ 60.692088][ T6802] RAX: ffffffffffffffda RBX: 000000000000ec27 RCX: 000000000045bee7 2020/06/13 22:38:34 building call list... [ 60.700066][ T6802] RDX: 00007ffcf9253de3 RSI: 00000000000001ff RDI: 00007ffcf9253de0 [ 60.708023][ T6802] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 60.715968][ T6802] R10: 0000000000000064 R11: 0000000000000202 R12: 0000000000000003 [ 60.724002][ T6802] R13: 00007ffcf9253dd0 R14: 000000000000ec18 R15: 00007ffcf9253de0 [ 60.984598][ T37] tipc: TX() has been purged, node left! [ 61.516750][ T37] ================================================================== [ 61.525754][ T37] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x7a7/0x880 [ 61.533943][ T37] Write of size 1 at addr ffff8880974e31e4 by task kworker/u4:2/37 [ 61.541820][ T37] [ 61.544154][ T37] CPU: 1 PID: 37 Comm: kworker/u4:2 Not tainted 5.7.0-syzkaller #0 [ 61.552032][ T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.562086][ T37] Workqueue: netns cleanup_net [ 61.566853][ T37] Call Trace: [ 61.570141][ T37] dump_stack+0x188/0x20d [ 61.574472][ T37] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.580024][ T37] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.585575][ T37] ? afs_put_call+0xa70/0xa70 [ 61.590248][ T37] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.597269][ T37] ? vprintk_func+0x97/0x1a6 [ 61.601863][ T37] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.607491][ T37] kasan_report.cold+0x1f/0x37 [ 61.612253][ T37] ? afs_wake_up_async_call+0x7a7/0x880 [ 61.617801][ T37] afs_wake_up_async_call+0x7a7/0x880 [ 61.623167][ T37] ? do_raw_spin_lock+0x129/0x2e0 [ 61.628184][ T37] ? afs_close_socket+0x320/0x320 [ 61.633202][ T37] ? rwlock_bug.part.0+0x90/0x90 [ 61.638133][ T37] ? rcu_read_lock_held+0x9c/0xb0 [ 61.643152][ T37] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.648779][ T37] ? afs_close_socket+0x320/0x320 [ 61.653799][ T37] ? afs_put_call+0xa70/0xa70 [ 61.658467][ T37] rxrpc_notify_socket+0x1e5/0x5e0 [ 61.663578][ T37] ? afs_put_call+0xa70/0xa70 [ 61.668248][ T37] __rxrpc_set_call_completion.part.0+0x172/0x420 [ 61.674661][ T37] rxrpc_call_completed+0xca/0xf0 [ 61.679700][ T37] rxrpc_discard_prealloc+0x786/0xac0 [ 61.685081][ T37] ? lock_sock_nested+0x94/0x110 [ 61.690034][ T37] rxrpc_listen+0x147/0x360 [ 61.694552][ T37] afs_close_socket+0x95/0x320 [ 61.699313][ T37] ? afs_purge_servers+0x16d/0x300 [ 61.704419][ T37] ? afs_rx_discard_new_call+0x50/0x50 [ 61.709861][ T37] ? debug_smp_processor_id+0x2f/0x185 [ 61.715407][ T37] ? init_wait_var_entry+0x200/0x200 [ 61.720681][ T37] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.726310][ T37] afs_net_exit+0x1bc/0x310 [ 61.730803][ T37] ? afs_net_init+0xe30/0xe30 [ 61.735469][ T37] ops_exit_list.isra.0+0xa8/0x150 [ 61.740578][ T37] cleanup_net+0x511/0xa50 [ 61.744998][ T37] ? unregister_pernet_device+0x70/0x70 [ 61.750552][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.756545][ T37] process_one_work+0x965/0x16a0 [ 61.761486][ T37] ? lock_release+0x800/0x800 [ 61.766183][ T37] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.771551][ T37] ? rwlock_bug.part.0+0x90/0x90 [ 61.776489][ T37] worker_thread+0x96/0xe10 [ 61.781258][ T37] ? process_one_work+0x16a0/0x16a0 [ 61.786450][ T37] kthread+0x388/0x470 [ 61.790519][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.797185][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.802894][ T37] ret_from_fork+0x24/0x30 [ 61.807295][ T37] [ 61.809613][ T37] Allocated by task 6802: [ 61.813990][ T37] save_stack+0x1b/0x40 [ 61.818143][ T37] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.823771][ T37] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.829133][ T37] afs_alloc_call+0x55/0x640 [ 61.833700][ T37] afs_charge_preallocation+0xe9/0x2d0 [ 61.839139][ T37] afs_open_socket+0x292/0x360 [ 61.843893][ T37] afs_net_init+0xa6c/0xe30 [ 61.848383][ T37] ops_init+0xaf/0x420 [ 61.852424][ T37] setup_net+0x2de/0x860 [ 61.856643][ T37] copy_net_ns+0x293/0x590 [ 61.861039][ T37] create_new_namespaces+0x3fb/0xb30 [ 61.866308][ T37] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.871991][ T37] ksys_unshare+0x43d/0x8e0 [ 61.876480][ T37] __x64_sys_unshare+0x2d/0x40 [ 61.881230][ T37] do_syscall_64+0xf6/0x7d0 [ 61.885751][ T37] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 61.891627][ T37] [ 61.893957][ T37] Freed by task 37: [ 61.897763][ T37] save_stack+0x1b/0x40 [ 61.901907][ T37] __kasan_slab_free+0xf7/0x140 [ 61.906743][ T37] kfree+0x109/0x2b0 [ 61.910650][ T37] afs_put_call+0x59b/0xa70 [ 61.915142][ T37] rxrpc_discard_prealloc+0x769/0xac0 [ 61.920508][ T37] rxrpc_listen+0x147/0x360 [ 61.925008][ T37] afs_close_socket+0x95/0x320 [ 61.929790][ T37] afs_net_exit+0x1bc/0x310 [ 61.934297][ T37] ops_exit_list.isra.0+0xa8/0x150 [ 61.939414][ T37] cleanup_net+0x511/0xa50 [ 61.943832][ T37] process_one_work+0x965/0x16a0 [ 61.948786][ T37] worker_thread+0x96/0xe10 [ 61.953292][ T37] kthread+0x388/0x470 [ 61.957360][ T37] ret_from_fork+0x24/0x30 [ 61.961760][ T37] [ 61.964091][ T37] The buggy address belongs to the object at ffff8880974e3000 [ 61.964091][ T37] which belongs to the cache kmalloc-1k of size 1024 [ 61.978149][ T37] The buggy address is located 484 bytes inside of [ 61.978149][ T37] 1024-byte region [ffff8880974e3000, ffff8880974e3400) [ 61.991498][ T37] The buggy address belongs to the page: [ 61.997142][ T37] page:ffffea00025d38c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 62.006246][ T37] flags: 0xfffe0000000200(slab) [ 62.011088][ T37] raw: 00fffe0000000200 ffffea00025c8b48 ffffea0002769dc8 ffff8880aa000c40 [ 62.019658][ T37] raw: 0000000000000000 ffff8880974e3000 0000000100000002 0000000000000000 [ 62.028215][ T37] page dumped because: kasan: bad access detected [ 62.034604][ T37] [ 62.036921][ T37] Memory state around the buggy address: [ 62.042673][ T37] ffff8880974e3080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.050736][ T37] ffff8880974e3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.058821][ T37] >ffff8880974e3180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.066876][ T37] ^ [ 62.075101][ T37] ffff8880974e3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.083154][ T37] ffff8880974e3280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.091188][ T37] ================================================================== [ 62.099244][ T37] Disabling lock debugging due to kernel taint [ 62.105452][ T37] Kernel panic - not syncing: panic_on_warn set ... [ 62.112040][ T37] CPU: 1 PID: 37 Comm: kworker/u4:2 Tainted: G B 5.7.0-syzkaller #0 [ 62.121384][ T37] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.131462][ T37] Workqueue: netns cleanup_net [ 62.136219][ T37] Call Trace: [ 62.139506][ T37] dump_stack+0x188/0x20d [ 62.143836][ T37] ? afs_wake_up_async_call+0x6b0/0x880 [ 62.149379][ T37] ? afs_put_call+0xa70/0xa70 [ 62.154055][ T37] panic+0x2e3/0x75c [ 62.157935][ T37] ? add_taint.cold+0x16/0x16 [ 62.162690][ T37] ? retint_kernel+0x2b/0x2b [ 62.167274][ T37] ? trace_hardirqs_on+0x55/0x230 [ 62.172299][ T37] ? afs_wake_up_async_call+0x7a7/0x880 [ 62.177894][ T37] ? afs_wake_up_async_call+0x7a7/0x880 [ 62.183420][ T37] ? afs_put_call+0xa70/0xa70 [ 62.188079][ T37] end_report+0x4d/0x53 [ 62.192221][ T37] kasan_report.cold+0xd/0x37 [ 62.196887][ T37] ? afs_wake_up_async_call+0x7a7/0x880 [ 62.202414][ T37] afs_wake_up_async_call+0x7a7/0x880 [ 62.207875][ T37] ? do_raw_spin_lock+0x129/0x2e0 [ 62.212889][ T37] ? afs_close_socket+0x320/0x320 [ 62.217903][ T37] ? rwlock_bug.part.0+0x90/0x90 [ 62.222827][ T37] ? rcu_read_lock_held+0x9c/0xb0 [ 62.227937][ T37] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.233561][ T37] ? afs_close_socket+0x320/0x320 [ 62.238580][ T37] ? afs_put_call+0xa70/0xa70 [ 62.243243][ T37] rxrpc_notify_socket+0x1e5/0x5e0 [ 62.248347][ T37] ? afs_put_call+0xa70/0xa70 [ 62.253147][ T37] __rxrpc_set_call_completion.part.0+0x172/0x420 [ 62.259641][ T37] rxrpc_call_completed+0xca/0xf0 [ 62.264651][ T37] rxrpc_discard_prealloc+0x786/0xac0 [ 62.270038][ T37] ? lock_sock_nested+0x94/0x110 [ 62.274973][ T37] rxrpc_listen+0x147/0x360 [ 62.279558][ T37] afs_close_socket+0x95/0x320 [ 62.284322][ T37] ? afs_purge_servers+0x16d/0x300 [ 62.289449][ T37] ? afs_rx_discard_new_call+0x50/0x50 [ 62.295361][ T37] ? debug_smp_processor_id+0x2f/0x185 [ 62.300841][ T37] ? init_wait_var_entry+0x200/0x200 [ 62.306232][ T37] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.311862][ T37] afs_net_exit+0x1bc/0x310 [ 62.316349][ T37] ? afs_net_init+0xe30/0xe30 [ 62.321014][ T37] ops_exit_list.isra.0+0xa8/0x150 [ 62.326217][ T37] cleanup_net+0x511/0xa50 [ 62.330618][ T37] ? unregister_pernet_device+0x70/0x70 [ 62.337106][ T37] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.343075][ T37] process_one_work+0x965/0x16a0 [ 62.348001][ T37] ? lock_release+0x800/0x800 [ 62.352665][ T37] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.358028][ T37] ? rwlock_bug.part.0+0x90/0x90 [ 62.362972][ T37] worker_thread+0x96/0xe10 [ 62.367474][ T37] ? process_one_work+0x16a0/0x16a0 [ 62.372802][ T37] kthread+0x388/0x470 [ 62.376876][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.382580][ T37] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.388407][ T37] ret_from_fork+0x24/0x30 [ 62.393500][ T37] Kernel Offset: disabled [ 62.397820][ T37] Rebooting in 86400 seconds..