Starting Load/Save RF Kill Switch Status... [ 54.030997][ T6741] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6741 [ 54.040505][ T6741] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 54.046762][ T6741] CPU: 0 PID: 6741 Comm: systemd-rfkill Not tainted 5.7.0-syzkaller #0 [ 54.055020][ T6741] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.065066][ T6741] Call Trace: [ 54.068359][ T6741] dump_stack+0x18f/0x20d [ 54.072674][ T6741] check_preemption_disabled+0x20d/0x220 [ 54.078297][ T6741] ext4_mb_new_blocks+0xa4d/0x3b70 [ 54.083410][ T6741] ? ext4_ext_search_right+0x2ca/0xb20 [ 54.088862][ T6741] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 54.094638][ T6741] ext4_ext_map_blocks+0x201b/0x33e0 [ 54.099918][ T6741] ? ext4_ext_release+0x10/0x10 [ 54.105564][ T6741] ? down_write_killable+0x170/0x170 [ 54.110842][ T6741] ? ext4_es_lookup_extent+0x41d/0xd10 [ 54.116281][ T6741] ext4_map_blocks+0x4cb/0x1640 [ 54.121116][ T6741] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 54.126291][ T6741] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 54.131818][ T6741] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 54.137802][ T6741] ? prandom_u32_state+0xe/0x170 [ 54.142721][ T6741] ? __brelse+0x84/0xa0 [ 54.146877][ T6741] ? __ext4_new_inode+0x144/0x55e0 [ 54.151982][ T6741] ext4_getblk+0xad/0x520 [ 54.156316][ T6741] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 54.162025][ T6741] ? ext4_free_inode+0x1700/0x1700 [ 54.167119][ T6741] ext4_bread+0x7c/0x380 [ 54.171364][ T6741] ? ext4_getblk+0x520/0x520 [ 54.175945][ T6741] ? dquot_get_next_dqblk+0x180/0x180 [ 54.181306][ T6741] ext4_append+0x153/0x360 [ 54.185708][ T6741] ext4_mkdir+0x5e0/0xdf0 [ 54.190021][ T6741] ? ext4_rmdir+0xde0/0xde0 [ 54.194505][ T6741] ? security_inode_permission+0xc4/0xf0 [ 54.200120][ T6741] vfs_mkdir+0x419/0x690 [ 54.204378][ T6741] do_mkdirat+0x21e/0x280 [ 54.208740][ T6741] ? __ia32_sys_mknod+0xb0/0xb0 [ 54.213603][ T6741] ? do_syscall_64+0x1c/0xe0 [ 54.218180][ T6741] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 54.224141][ T6741] do_syscall_64+0x60/0xe0 [ 54.228558][ T6741] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 54.234430][ T6741] RIP: 0033:0x7f97408e9687 [ 54.238835][ T6741] Code: Bad RIP value. [ 54.242887][ T6741] RSP: 002b:00007ffcdc90cea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 54.251274][ T6741] RAX: ffffffffffffffda RBX: 000055860f5d2985 RCX: 00007f97408e9687 [ 54.259237][ T6741] RDX: 00007ffcdc90cd70 RSI: 00000000000001ed RDI: 000055860f5d2985 [ 54.267202][ T6741] RBP: 00007f97408e9680 R08: 0000000000000100 R09: 0000000000000000 [ 54.275163][ T6741] R10: 000055860f5d2980 R11: 0000000000000246 R12: 00000000000001ed [ 54.283114][ T6741] R13: 00007ffcdc90d030 R14: 0000000000000000 R15: 0000000000000000 [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 syzkaller login: [ 58.474873][ T287] BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u4:5/287 [ 58.484055][ T287] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.490143][ T287] CPU: 0 PID: 287 Comm: kworker/u4:5 Not tainted 5.7.0-syzkaller #0 [ 58.498377][ T287] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.509415][ T287] Workqueue: writeback wb_workfn (flush-8:0) [ 58.516252][ T287] Call Trace: [ 58.519534][ T287] dump_stack+0x18f/0x20d [ 58.524036][ T287] check_preemption_disabled+0x20d/0x220 [ 58.529675][ T287] ext4_mb_new_blocks+0xa4d/0x3b70 [ 58.534786][ T287] ? ext4_find_extent+0x81a/0xad0 [ 58.539793][ T287] ? ext4_ext_search_right+0x2ca/0xb20 [ 58.545417][ T287] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 58.551267][ T287] ext4_ext_map_blocks+0x201b/0x33e0 [ 58.556635][ T287] ? ext4_ext_release+0x10/0x10 [ 58.561694][ T287] ? down_write_killable+0x170/0x170 [ 58.567700][ T287] ? ext4_es_lookup_extent+0x41d/0xd10 [ 58.573344][ T287] ext4_map_blocks+0x4cb/0x1640 [ 58.578362][ T287] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 58.583951][ T287] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.589518][ T287] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.595622][ T287] ? ext4_alloc_io_end_vec+0x145/0x1c0 [ 58.601527][ T287] ext4_writepages+0x1a7b/0x33c0 [ 58.607552][ T287] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.613641][ T287] ? __lock_acquire+0x2224/0x48b0 [ 58.618686][ T287] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.625020][ T287] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 58.630995][ T287] ? __ext4_mark_inode_dirty+0x940/0x940 [ 58.636808][ T287] ? do_writepages+0xfa/0x2a0 [ 58.641602][ T287] do_writepages+0xfa/0x2a0 [ 58.646598][ T287] ? page_writeback_cpu_online+0x10/0x10 [ 58.652229][ T287] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.657776][ T287] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.663995][ T287] ? lock_downgrade+0x840/0x840 [ 58.668842][ T287] __writeback_single_inode+0x12a/0x13d0 [ 58.674499][ T287] ? _raw_spin_unlock+0x24/0x40 [ 58.679978][ T287] ? wbc_attach_and_unlock_inode+0x60a/0x9c0 [ 58.686878][ T287] writeback_sb_inodes+0x515/0xdc0 [ 58.691984][ T287] ? __writeback_single_inode+0x13d0/0x13d0 [ 58.697883][ T287] __writeback_inodes_wb+0xc3/0x250 [ 58.703080][ T287] wb_writeback+0x8db/0xd50 [ 58.707678][ T287] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0 [ 58.714407][ T287] ? _find_next_bit.constprop.0+0x1a3/0x200 [ 58.721423][ T287] ? cpumask_next+0x3c/0x40 [ 58.726011][ T287] ? get_nr_dirty_inodes+0xd6/0x130 [ 58.731301][ T287] wb_workfn+0xab3/0x1090 [ 58.735629][ T287] ? inode_wait_for_writeback+0x30/0x30 [ 58.741269][ T287] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.746810][ T287] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 58.752788][ T287] process_one_work+0x965/0x1690 [ 58.757751][ T287] ? lock_release+0x800/0x800 [ 58.762557][ T287] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.768774][ T287] ? rwlock_bug.part.0+0x90/0x90 [ 58.773922][ T287] worker_thread+0x96/0xe10 [ 58.778430][ T287] ? process_one_work+0x1690/0x1690 [ 58.783635][ T287] kthread+0x3b5/0x4a0 [ 58.787812][ T287] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.793924][ T287] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 58.799633][ T287] ret_from_fork+0x1f/0x30 Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. 2020/06/14 22:08:03 fuzzer started 2020/06/14 22:08:03 connecting to host at 10.128.0.26:44615 2020/06/14 22:08:03 checking machine... 2020/06/14 22:08:03 checking revisions... 2020/06/14 22:08:03 testing simple program... [ 59.608943][ T6813] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6813 [ 59.618170][ T6813] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.624184][ T6813] CPU: 0 PID: 6813 Comm: syz-fuzzer Not tainted 5.7.0-syzkaller #0 [ 59.633340][ T6813] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.643865][ T6813] Call Trace: [ 59.647238][ T6813] dump_stack+0x18f/0x20d [ 59.651610][ T6813] check_preemption_disabled+0x20d/0x220 [ 59.657247][ T6813] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.662523][ T6813] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.668032][ T6813] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.673741][ T6813] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.679059][ T6813] ? ext4_ext_release+0x10/0x10 [ 59.683898][ T6813] ? down_write_killable+0x170/0x170 [ 59.689700][ T6813] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.695142][ T6813] ext4_map_blocks+0x4cb/0x1640 [ 59.699984][ T6813] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.705262][ T6813] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.710823][ T6813] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.716899][ T6813] ? prandom_u32_state+0xe/0x170 [ 59.721906][ T6813] ? __brelse+0x84/0xa0 [ 59.726063][ T6813] ? __ext4_new_inode+0x144/0x55e0 [ 59.731795][ T6813] ext4_getblk+0xad/0x520 [ 59.736143][ T6813] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.742051][ T6813] ? ext4_free_inode+0x1700/0x1700 [ 59.747165][ T6813] ext4_bread+0x7c/0x380 [ 59.751398][ T6813] ? ext4_getblk+0x520/0x520 [ 59.755980][ T6813] ? dquot_get_next_dqblk+0x180/0x180 [ 59.762550][ T6813] ext4_append+0x153/0x360 [ 59.766962][ T6813] ext4_mkdir+0x5e0/0xdf0 [ 59.771377][ T6813] ? ext4_rmdir+0xde0/0xde0 [ 59.776470][ T6813] ? security_inode_permission+0xc4/0xf0 [ 59.782888][ T6813] vfs_mkdir+0x419/0x690 [ 59.787550][ T6813] do_mkdirat+0x21e/0x280 [ 59.792180][ T6813] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.797133][ T6813] ? do_syscall_64+0x1c/0xe0 [ 59.802495][ T6813] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.810814][ T6813] do_syscall_64+0x60/0xe0 [ 59.815430][ T6813] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.823119][ T6813] RIP: 0033:0x4b02a0 [ 59.827365][ T6813] Code: Bad RIP value. [ 59.831565][ T6813] RSP: 002b:000000c0003cf4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 59.841410][ T6813] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 59.849777][ T6813] RDX: 00000000000001c0 RSI: 000000c00009ec80 RDI: ffffffffffffff9c [ 59.858191][ T6813] RBP: 000000c0003cf510 R08: 0000000000000000 R09: 0000000000000000 [ 59.866246][ T6813] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 59.876388][ T6813] R13: 0000000000000065 R14: 0000000000000064 R15: 0000000000000100 [ 59.895674][ T6826] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6826 [ 59.905271][ T6826] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.911690][ T6826] CPU: 0 PID: 6826 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 59.926818][ T6826] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.937834][ T6826] Call Trace: [ 59.941485][ T6826] dump_stack+0x18f/0x20d [ 59.945994][ T6826] check_preemption_disabled+0x20d/0x220 [ 59.953479][ T6826] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.958779][ T6826] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.964342][ T6826] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.970638][ T6826] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.976040][ T6826] ? ext4_ext_release+0x10/0x10 [ 59.981079][ T6826] ? down_write_killable+0x170/0x170 [ 59.986434][ T6826] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.991983][ T6826] ext4_map_blocks+0x4cb/0x1640 [ 59.996850][ T6826] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.005125][ T6826] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.011675][ T6826] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.017802][ T6826] ? prandom_u32_state+0xe/0x170 [ 60.023041][ T6826] ? __brelse+0x84/0xa0 [ 60.027743][ T6826] ? __ext4_new_inode+0x144/0x55e0 [ 60.032882][ T6826] ext4_getblk+0xad/0x520 [ 60.037232][ T6826] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.042948][ T6826] ? ext4_free_inode+0x1700/0x1700 [ 60.048616][ T6826] ext4_bread+0x7c/0x380 [ 60.052869][ T6826] ? ext4_getblk+0x520/0x520 [ 60.057454][ T6826] ? dquot_get_next_dqblk+0x180/0x180 [ 60.063268][ T6826] ext4_append+0x153/0x360 [ 60.067706][ T6826] ext4_mkdir+0x5e0/0xdf0 [ 60.072019][ T6826] ? ext4_rmdir+0xde0/0xde0 [ 60.076712][ T6826] ? security_inode_permission+0xc4/0xf0 [ 60.082354][ T6826] vfs_mkdir+0x419/0x690 [ 60.086579][ T6826] do_mkdirat+0x21e/0x280 [ 60.090904][ T6826] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.095879][ T6826] ? do_syscall_64+0x1c/0xe0 [ 60.100622][ T6826] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.106763][ T6826] do_syscall_64+0x60/0xe0 [ 60.111163][ T6826] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.117118][ T6826] RIP: 0033:0x45bee7 [ 60.120984][ T6826] Code: Bad RIP value. [ 60.125027][ T6826] RSP: 002b:00007fff309b8ef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 60.133605][ T6826] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bee7 [ 60.141901][ T6826] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007fff309b90d0 [ 60.149870][ T6826] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 00000000000029c0 [ 60.158299][ T6826] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 60.166292][ T6826] R13: 00007fff309b90d0 R14: 8421084210842109 R15: 00007fff309b90dc [ 60.253173][ T6827] IPVS: ftp: loaded support on port[0] = 21 [ 60.291856][ T6827] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6827 [ 60.301436][ T6827] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.307393][ T6827] CPU: 1 PID: 6827 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.315628][ T6827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.325898][ T6827] Call Trace: [ 60.329196][ T6827] dump_stack+0x18f/0x20d [ 60.333523][ T6827] check_preemption_disabled+0x20d/0x220 [ 60.339136][ T6827] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.344247][ T6827] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.349680][ T6827] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.355380][ T6827] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.360666][ T6827] ? ext4_ext_release+0x10/0x10 [ 60.365502][ T6827] ? down_write_killable+0x170/0x170 [ 60.370775][ T6827] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.376213][ T6827] ext4_map_blocks+0x4cb/0x1640 [ 60.381138][ T6827] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.386323][ T6827] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.391843][ T6827] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.397799][ T6827] ? prandom_u32_state+0xe/0x170 [ 60.402778][ T6827] ? __brelse+0x84/0xa0 [ 60.406940][ T6827] ? __ext4_new_inode+0x144/0x55e0 [ 60.412060][ T6827] ext4_getblk+0xad/0x520 [ 60.416390][ T6827] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.422090][ T6827] ? ext4_free_inode+0x1700/0x1700 [ 60.427180][ T6827] ext4_bread+0x7c/0x380 [ 60.431400][ T6827] ? ext4_getblk+0x520/0x520 [ 60.435966][ T6827] ? dquot_get_next_dqblk+0x180/0x180 [ 60.441347][ T6827] ext4_append+0x153/0x360 [ 60.447655][ T6827] ext4_mkdir+0x5e0/0xdf0 [ 60.452042][ T6827] ? ext4_rmdir+0xde0/0xde0 [ 60.456546][ T6827] ? security_inode_permission+0xc4/0xf0 [ 60.462176][ T6827] vfs_mkdir+0x419/0x690 [ 60.466402][ T6827] do_mkdirat+0x21e/0x280 [ 60.470720][ T6827] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.475548][ T6827] ? do_syscall_64+0x1c/0xe0 [ 60.480123][ T6827] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.486080][ T6827] do_syscall_64+0x60/0xe0 [ 60.490476][ T6827] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.496434][ T6827] RIP: 0033:0x45bee7 [ 60.500324][ T6827] Code: Bad RIP value. [ 60.504363][ T6827] RSP: 002b:00007fff309b8de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 60.512758][ T6827] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bee7 [ 60.520706][ T6827] RDX: 00007fff309b8e33 RSI: 00000000000001ff RDI: 00007fff309b8e30 [ 60.528665][ T6827] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 60.536615][ T6827] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185d0 [ 60.544694][ T6827] R13: 00007fff309b8e20 R14: 0000000000000000 R15: 00007fff309b8e30 [ 60.602065][ T6827] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6827 [ 60.612042][ T6827] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.618050][ T6827] CPU: 1 PID: 6827 Comm: syz-executor.0 Not tainted 5.7.0-syzkaller #0 [ 60.626290][ T6827] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.636349][ T6827] Call Trace: [ 60.639651][ T6827] dump_stack+0x18f/0x20d [ 60.644001][ T6827] check_preemption_disabled+0x20d/0x220 [ 60.649668][ T6827] ext4_mb_new_blocks+0xa4d/0x3b70 [ 60.654818][ T6827] ? ext4_ext_search_right+0x2ca/0xb20 [ 60.660293][ T6827] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 60.666034][ T6827] ext4_ext_map_blocks+0x201b/0x33e0 [ 60.671342][ T6827] ? ext4_ext_release+0x10/0x10 [ 60.676230][ T6827] ? down_write_killable+0x170/0x170 [ 60.681532][ T6827] ? ext4_es_lookup_extent+0x41d/0xd10 [ 60.686991][ T6827] ext4_map_blocks+0x4cb/0x1640 [ 60.691822][ T6827] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 60.696997][ T6827] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 60.702620][ T6827] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 60.708592][ T6827] ? prandom_u32_state+0xe/0x170 [ 60.713515][ T6827] ? __brelse+0x84/0xa0 [ 60.717667][ T6827] ? __ext4_new_inode+0x144/0x55e0 [ 60.722769][ T6827] ext4_getblk+0xad/0x520 [ 60.727099][ T6827] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 60.732798][ T6827] ? ext4_free_inode+0x1700/0x1700 [ 60.737907][ T6827] ext4_bread+0x7c/0x380 [ 60.742125][ T6827] ? ext4_getblk+0x520/0x520 [ 60.746691][ T6827] ? dquot_get_next_dqblk+0x180/0x180 [ 60.752053][ T6827] ext4_append+0x153/0x360 [ 60.756451][ T6827] ext4_mkdir+0x5e0/0xdf0 [ 60.760783][ T6827] ? ext4_rmdir+0xde0/0xde0 [ 60.765282][ T6827] ? security_inode_permission+0xc4/0xf0 [ 60.770908][ T6827] vfs_mkdir+0x419/0x690 [ 60.775732][ T6827] do_mkdirat+0x21e/0x280 [ 60.780049][ T6827] ? __ia32_sys_mknod+0xb0/0xb0 [ 60.785353][ T6827] ? do_syscall_64+0x1c/0xe0 [ 60.790308][ T6827] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 60.796292][ T6827] do_syscall_64+0x60/0xe0 [ 60.800713][ T6827] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.806589][ T6827] RIP: 0033:0x45bee7 [ 60.810455][ T6827] Code: Bad RIP value. [ 60.814618][ T6827] RSP: 002b:00007fff309b8de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 60.823116][ T6827] RAX: ffffffffffffffda RBX: 000000000000eca7 RCX: 000000000045bee7 [ 60.831095][ T6827] RDX: 00007fff309b8e33 RSI: 00000000000001ff RDI: 00007fff309b8e30 [ 60.839332][ T6827] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 2020/06/14 22:08:05 building call list... [ 60.847286][ T6827] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 60.855347][ T6827] R13: 00007fff309b8e20 R14: 000000000000ec93 R15: 00007fff309b8e30 [ 61.084154][ T7] tipc: TX() has been purged, node left! [ 61.616310][ T7] ================================================================== [ 61.624538][ T7] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 61.632423][ T7] Write of size 1 at addr ffff88809f8c59e4 by task kworker/u4:0/7 [ 61.640231][ T7] [ 61.642557][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.7.0-syzkaller #0 [ 61.650370][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.660427][ T7] Workqueue: netns cleanup_net [ 61.665177][ T7] Call Trace: [ 61.668462][ T7] dump_stack+0x18f/0x20d [ 61.672790][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.678327][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.683860][ T7] ? afs_put_call+0xa40/0xa40 [ 61.688530][ T7] print_address_description.constprop.0.cold+0xd3/0x413 [ 61.695696][ T7] ? vprintk_func+0x97/0x1a6 [ 61.700284][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.705910][ T7] kasan_report.cold+0x1f/0x37 [ 61.710669][ T7] ? rcu_read_lock_held+0x81/0xb0 [ 61.715711][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 61.721260][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 61.726630][ T7] ? afs_close_socket+0x320/0x320 [ 61.731735][ T7] ? afs_put_call+0xa40/0xa40 [ 61.736492][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 61.741602][ T7] ? afs_put_call+0xa40/0xa40 [ 61.746272][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 61.752685][ T7] rxrpc_call_completed+0xca/0xf0 [ 61.757709][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 61.763078][ T7] ? lock_sock_nested+0x94/0x110 [ 61.768013][ T7] rxrpc_listen+0x147/0x360 [ 61.772518][ T7] afs_close_socket+0x95/0x320 [ 61.777275][ T7] ? afs_purge_servers+0x16d/0x300 [ 61.782555][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 61.788017][ T7] ? init_wait_var_entry+0x200/0x200 [ 61.793302][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 61.798932][ T7] ? check_preemption_disabled+0x38/0x220 [ 61.804668][ T7] afs_net_exit+0x1bc/0x310 [ 61.809166][ T7] ? afs_net_init+0xe30/0xe30 [ 61.813835][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 61.818949][ T7] cleanup_net+0x511/0xa50 [ 61.823364][ T7] ? unregister_pernet_device+0x70/0x70 [ 61.828928][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 61.835800][ T7] process_one_work+0x965/0x1690 [ 61.840748][ T7] ? lock_release+0x800/0x800 [ 61.845423][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 61.850794][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 61.855758][ T7] worker_thread+0x96/0xe10 [ 61.860277][ T7] ? process_one_work+0x1690/0x1690 [ 61.866254][ T7] kthread+0x3b5/0x4a0 [ 61.870321][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.876035][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 61.881752][ T7] ret_from_fork+0x1f/0x30 [ 61.886171][ T7] [ 61.888490][ T7] Allocated by task 6827: [ 61.892827][ T7] save_stack+0x1b/0x40 [ 61.896978][ T7] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 61.902774][ T7] kmem_cache_alloc_trace+0x153/0x7d0 [ 61.908144][ T7] afs_alloc_call+0x55/0x630 [ 61.912725][ T7] afs_charge_preallocation+0xe9/0x2d0 [ 61.918276][ T7] afs_open_socket+0x292/0x360 [ 61.923047][ T7] afs_net_init+0xa6c/0xe30 [ 61.927544][ T7] ops_init+0xaf/0x420 [ 61.931605][ T7] setup_net+0x2de/0x860 [ 61.935945][ T7] copy_net_ns+0x293/0x590 [ 61.940366][ T7] create_new_namespaces+0x3fb/0xb30 [ 61.945652][ T7] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 61.951277][ T7] ksys_unshare+0x43d/0x8e0 [ 61.955776][ T7] __x64_sys_unshare+0x2d/0x40 [ 61.960533][ T7] do_syscall_64+0x60/0xe0 [ 61.964944][ T7] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.970817][ T7] [ 61.973135][ T7] Freed by task 7: [ 61.977563][ T7] save_stack+0x1b/0x40 [ 61.981711][ T7] __kasan_slab_free+0xf7/0x140 [ 61.986565][ T7] kfree+0x109/0x2b0 [ 61.990460][ T7] afs_put_call+0x585/0xa40 [ 61.994957][ T7] rxrpc_discard_prealloc+0x764/0xab0 [ 62.000422][ T7] rxrpc_listen+0x147/0x360 [ 62.004932][ T7] afs_close_socket+0x95/0x320 [ 62.009689][ T7] afs_net_exit+0x1bc/0x310 [ 62.015137][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 62.020338][ T7] cleanup_net+0x511/0xa50 [ 62.024746][ T7] process_one_work+0x965/0x1690 [ 62.029696][ T7] worker_thread+0x96/0xe10 [ 62.034197][ T7] kthread+0x3b5/0x4a0 [ 62.038259][ T7] ret_from_fork+0x1f/0x30 [ 62.042681][ T7] [ 62.045002][ T7] The buggy address belongs to the object at ffff88809f8c5800 [ 62.045002][ T7] which belongs to the cache kmalloc-1k of size 1024 [ 62.059162][ T7] The buggy address is located 484 bytes inside of [ 62.059162][ T7] 1024-byte region [ffff88809f8c5800, ffff88809f8c5c00) [ 62.073325][ T7] The buggy address belongs to the page: [ 62.078960][ T7] page:ffffea00027e3140 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 62.088233][ T7] flags: 0xfffe0000000200(slab) [ 62.093170][ T7] raw: 00fffe0000000200 ffffea00029ba188 ffffea00027b90c8 ffff8880aa000c40 [ 62.101764][ T7] raw: 0000000000000000 ffff88809f8c5000 0000000100000002 0000000000000000 [ 62.110339][ T7] page dumped because: kasan: bad access detected [ 62.116761][ T7] [ 62.119102][ T7] Memory state around the buggy address: [ 62.124810][ T7] ffff88809f8c5880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.132864][ T7] ffff88809f8c5900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.140917][ T7] >ffff88809f8c5980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.148964][ T7] ^ [ 62.156151][ T7] ffff88809f8c5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.164629][ T7] ffff88809f8c5a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.172697][ T7] ================================================================== [ 62.180759][ T7] Disabling lock debugging due to kernel taint [ 62.186989][ T7] Kernel panic - not syncing: panic_on_warn set ... [ 62.193567][ T7] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G B 5.7.0-syzkaller #0 [ 62.202769][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.212848][ T7] Workqueue: netns cleanup_net [ 62.217627][ T7] Call Trace: [ 62.220923][ T7] dump_stack+0x18f/0x20d [ 62.225252][ T7] ? afs_wake_up_async_call+0x5f0/0x770 [ 62.230935][ T7] ? afs_put_call+0xa40/0xa40 [ 62.235611][ T7] panic+0x2e3/0x75c [ 62.239514][ T7] ? __warn_printk+0xf3/0xf3 [ 62.244709][ T7] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 62.250853][ T7] ? trace_hardirqs_on+0x55/0x220 [ 62.255869][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.261397][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.266941][ T7] ? afs_put_call+0xa40/0xa40 [ 62.271604][ T7] end_report+0x4d/0x53 [ 62.275748][ T7] kasan_report.cold+0xd/0x37 [ 62.280436][ T7] ? rcu_read_lock_held+0x81/0xb0 [ 62.285442][ T7] ? afs_wake_up_async_call+0x6aa/0x770 [ 62.291001][ T7] afs_wake_up_async_call+0x6aa/0x770 [ 62.296359][ T7] ? afs_close_socket+0x320/0x320 [ 62.301468][ T7] ? afs_put_call+0xa40/0xa40 [ 62.306139][ T7] rxrpc_notify_socket+0x1db/0x5d0 [ 62.311248][ T7] ? afs_put_call+0xa40/0xa40 [ 62.315920][ T7] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 62.322338][ T7] rxrpc_call_completed+0xca/0xf0 [ 62.327357][ T7] rxrpc_discard_prealloc+0x781/0xab0 [ 62.332735][ T7] ? lock_sock_nested+0x94/0x110 [ 62.337678][ T7] rxrpc_listen+0x147/0x360 [ 62.342166][ T7] afs_close_socket+0x95/0x320 [ 62.346992][ T7] ? afs_purge_servers+0x16d/0x300 [ 62.352360][ T7] ? afs_rx_discard_new_call+0x50/0x50 [ 62.357829][ T7] ? init_wait_var_entry+0x200/0x200 [ 62.363548][ T7] ? rcu_read_lock_held_common+0xa0/0xa0 [ 62.369229][ T7] ? check_preemption_disabled+0x38/0x220 [ 62.374956][ T7] afs_net_exit+0x1bc/0x310 [ 62.379460][ T7] ? afs_net_init+0xe30/0xe30 [ 62.384123][ T7] ops_exit_list.isra.0+0xa8/0x150 [ 62.389233][ T7] cleanup_net+0x511/0xa50 [ 62.393633][ T7] ? unregister_pernet_device+0x70/0x70 [ 62.399167][ T7] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 62.405278][ T7] process_one_work+0x965/0x1690 [ 62.410217][ T7] ? lock_release+0x800/0x800 [ 62.414880][ T7] ? pwq_dec_nr_in_flight+0x310/0x310 [ 62.420257][ T7] ? rwlock_bug.part.0+0x90/0x90 [ 62.425216][ T7] worker_thread+0x96/0xe10 [ 62.429708][ T7] ? process_one_work+0x1690/0x1690 [ 62.434889][ T7] kthread+0x3b5/0x4a0 [ 62.438966][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.444666][ T7] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 62.452191][ T7] ret_from_fork+0x1f/0x30 [ 62.457917][ T7] Kernel Offset: disabled [ 62.462259][ T7] Rebooting in 86400 seconds..