Starting Load/Save RF Kill Switch Status... [ 59.087007][ T6730] BUG: using smp_processor_id() in preemptible [00000000] code: systemd-rfkill/6730 [ 59.096542][ T6730] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.102617][ T6730] CPU: 1 PID: 6730 Comm: systemd-rfkill Not tainted 5.8.0-rc1-syzkaller #0 [ 59.111206][ T6730] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.121360][ T6730] Call Trace: [ 59.124665][ T6730] dump_stack+0x18f/0x20d [ 59.129042][ T6730] check_preemption_disabled+0x20d/0x220 [ 59.134689][ T6730] ext4_mb_new_blocks+0xa4d/0x3b70 [ 59.139825][ T6730] ? ext4_ext_search_right+0x2ca/0xb20 [ 59.145296][ T6730] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 59.151127][ T6730] ext4_ext_map_blocks+0x201b/0x33e0 [ 59.156467][ T6730] ? ext4_ext_release+0x10/0x10 [ 59.161370][ T6730] ? down_write_killable+0x170/0x170 [ 59.166669][ T6730] ? ext4_es_lookup_extent+0x41d/0xd10 [ 59.172245][ T6730] ext4_map_blocks+0x4cb/0x1640 [ 59.177115][ T6730] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 59.182331][ T6730] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.187987][ T6730] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 59.193975][ T6730] ? prandom_u32_state+0xe/0x170 [ 59.198994][ T6730] ? __brelse+0x84/0xa0 [ 59.199030][ T6730] ? __ext4_new_inode+0x144/0x55e0 [ 59.199051][ T6730] ext4_getblk+0xad/0x520 [ 59.212732][ T6730] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 59.212758][ T6730] ? ext4_free_inode+0x1700/0x1700 [ 59.223645][ T6730] ext4_bread+0x7c/0x380 [ 59.223665][ T6730] ? ext4_getblk+0x520/0x520 [ 59.223681][ T6730] ? dquot_get_next_dqblk+0x180/0x180 [ 59.223705][ T6730] ext4_append+0x153/0x360 [ 59.223726][ T6730] ext4_mkdir+0x5e0/0xdf0 [ 59.223750][ T6730] ? ext4_rmdir+0xde0/0xde0 [ 59.223770][ T6730] ? security_inode_permission+0xc4/0xf0 [ 59.223794][ T6730] vfs_mkdir+0x419/0x690 [ 59.223815][ T6730] do_mkdirat+0x21e/0x280 [ 59.223834][ T6730] ? __ia32_sys_mknod+0xb0/0xb0 [ 59.223850][ T6730] ? do_syscall_64+0x1c/0xe0 [ 59.223867][ T6730] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 59.223887][ T6730] do_syscall_64+0x60/0xe0 [ 59.223907][ T6730] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 59.223920][ T6730] RIP: 0033:0x7f3f5ea41687 [ 59.223926][ T6730] Code: Bad RIP value. [ 59.223945][ T6730] RSP: 002b:00007ffeaa42f998 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 59.223961][ T6730] RAX: ffffffffffffffda RBX: 000055fb3da07985 RCX: 00007f3f5ea41687 [ 59.223970][ T6730] RDX: 00007ffeaa42f860 RSI: 00000000000001ed RDI: 000055fb3da07985 [ 59.223980][ T6730] RBP: 00007f3f5ea41680 R08: 0000000000000100 R09: 0000000000000000 [ 59.223989][ T6730] R10: 000055fb3da07980 R11: 0000000000000246 R12: 00000000000001ed [ 59.223998][ T6730] R13: 00007ffeaa42fb20 R14: 0000000000000000 R15: 0000000000000000 Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.113' (ECDSA) to the list of known hosts. 2020/06/18 08:14:47 fuzzer started 2020/06/18 08:14:47 connecting to host at 10.128.0.26:41935 2020/06/18 08:14:47 checking machine... 2020/06/18 08:14:47 checking revisions... 2020/06/18 08:14:47 testing simple program... syzkaller login: [ 63.908277][ T6801] BUG: using smp_processor_id() in preemptible [00000000] code: syz-fuzzer/6801 [ 63.917505][ T6801] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.923763][ T6801] CPU: 1 PID: 6801 Comm: syz-fuzzer Not tainted 5.8.0-rc1-syzkaller #0 [ 63.932222][ T6801] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 63.942534][ T6801] Call Trace: [ 63.945970][ T6801] dump_stack+0x18f/0x20d [ 63.950295][ T6801] check_preemption_disabled+0x20d/0x220 [ 63.955925][ T6801] ext4_mb_new_blocks+0xa4d/0x3b70 [ 63.961032][ T6801] ? ext4_ext_search_right+0x2ca/0xb20 [ 63.966482][ T6801] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 63.972213][ T6801] ext4_ext_map_blocks+0x201b/0x33e0 [ 63.977504][ T6801] ? ext4_ext_release+0x10/0x10 [ 63.982374][ T6801] ? down_write_killable+0x170/0x170 [ 63.988801][ T6801] ? ext4_es_lookup_extent+0x41d/0xd10 [ 63.994267][ T6801] ext4_map_blocks+0x4cb/0x1640 [ 63.999111][ T6801] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.004489][ T6801] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.010035][ T6801] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.016552][ T6801] ? prandom_u32_state+0xe/0x170 [ 64.021481][ T6801] ? __brelse+0x84/0xa0 [ 64.025634][ T6801] ? __ext4_new_inode+0x144/0x55e0 [ 64.030732][ T6801] ext4_getblk+0xad/0x520 [ 64.035180][ T6801] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.040886][ T6801] ? ext4_free_inode+0x1700/0x1700 [ 64.046344][ T6801] ext4_bread+0x7c/0x380 [ 64.050587][ T6801] ? ext4_getblk+0x520/0x520 [ 64.055179][ T6801] ? dquot_get_next_dqblk+0x180/0x180 [ 64.060534][ T6801] ext4_append+0x153/0x360 [ 64.064940][ T6801] ext4_mkdir+0x5e0/0xdf0 [ 64.069252][ T6801] ? ext4_rmdir+0xde0/0xde0 [ 64.073919][ T6801] ? security_inode_permission+0xc4/0xf0 [ 64.079539][ T6801] vfs_mkdir+0x419/0x690 [ 64.083960][ T6801] do_mkdirat+0x21e/0x280 [ 64.088281][ T6801] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.093272][ T6801] ? do_syscall_64+0x1c/0xe0 [ 64.098459][ T6801] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.105568][ T6801] do_syscall_64+0x60/0xe0 [ 64.110090][ T6801] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.116144][ T6801] RIP: 0033:0x4b02a0 [ 64.120037][ T6801] Code: Bad RIP value. [ 64.124098][ T6801] RSP: 002b:000000c00004f4b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000102 [ 64.132497][ T6801] RAX: ffffffffffffffda RBX: 000000c00002c000 RCX: 00000000004b02a0 [ 64.140561][ T6801] RDX: 00000000000001c0 RSI: 000000c0000269c0 RDI: ffffffffffffff9c [ 64.149415][ T6801] RBP: 000000c00004f510 R08: 0000000000000000 R09: 0000000000000000 [ 64.157864][ T6801] R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff [ 64.166165][ T6801] R13: 000000000000004f R14: 000000000000004e R15: 0000000000000100 [ 64.194492][ T6814] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6814 [ 64.204089][ T6814] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.209971][ T6814] CPU: 0 PID: 6814 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.218695][ T6814] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.228745][ T6814] Call Trace: [ 64.232043][ T6814] dump_stack+0x18f/0x20d [ 64.236516][ T6814] check_preemption_disabled+0x20d/0x220 [ 64.242438][ T6814] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.247710][ T6814] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.253243][ T6814] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.258969][ T6814] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.264393][ T6814] ? ext4_ext_release+0x10/0x10 [ 64.269243][ T6814] ? down_write_killable+0x170/0x170 [ 64.274511][ T6814] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.280050][ T6814] ext4_map_blocks+0x4cb/0x1640 [ 64.284887][ T6814] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.290073][ T6814] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.295609][ T6814] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.302974][ T6814] ? prandom_u32_state+0xe/0x170 [ 64.308173][ T6814] ? __brelse+0x84/0xa0 [ 64.312404][ T6814] ? __ext4_new_inode+0x144/0x55e0 [ 64.317514][ T6814] ext4_getblk+0xad/0x520 [ 64.321919][ T6814] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.327636][ T6814] ? ext4_free_inode+0x1700/0x1700 [ 64.333013][ T6814] ext4_bread+0x7c/0x380 [ 64.337353][ T6814] ? ext4_getblk+0x520/0x520 [ 64.341955][ T6814] ? dquot_get_next_dqblk+0x180/0x180 [ 64.347346][ T6814] ext4_append+0x153/0x360 [ 64.351809][ T6814] ext4_mkdir+0x5e0/0xdf0 [ 64.356159][ T6814] ? ext4_rmdir+0xde0/0xde0 [ 64.360674][ T6814] ? security_inode_permission+0xc4/0xf0 [ 64.366327][ T6814] vfs_mkdir+0x419/0x690 [ 64.370591][ T6814] do_mkdirat+0x21e/0x280 [ 64.374933][ T6814] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.379797][ T6814] ? do_syscall_64+0x1c/0xe0 [ 64.384438][ T6814] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.390555][ T6814] do_syscall_64+0x60/0xe0 [ 64.395120][ T6814] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.401020][ T6814] RIP: 0033:0x45bed7 [ 64.404911][ T6814] Code: Bad RIP value. [ 64.408975][ T6814] RSP: 002b:00007fff2b360bc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 64.417534][ T6814] RAX: ffffffffffffffda RBX: 000000000003a2f8 RCX: 000000000045bed7 [ 64.425500][ T6814] RDX: 0000000000000002 RSI: 00000000000001c0 RDI: 00007fff2b360da0 [ 64.433599][ T6814] RBP: 0000000000000001 R08: 000000000000f8c0 R09: 0000000000002a40 [ 64.441559][ T6814] R10: 0000000000000011 R11: 0000000000000246 R12: 00000000000000c2 [ 64.449523][ T6814] R13: 00007fff2b360da0 R14: 8421084210842109 R15: 00007fff2b360dac [ 64.540899][ T6816] IPVS: ftp: loaded support on port[0] = 21 [ 64.577944][ T6816] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6816 [ 64.587692][ T6816] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.593664][ T6816] CPU: 1 PID: 6816 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.602254][ T6816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.612538][ T6816] Call Trace: [ 64.615818][ T6816] dump_stack+0x18f/0x20d [ 64.620135][ T6816] check_preemption_disabled+0x20d/0x220 [ 64.625892][ T6816] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.630993][ T6816] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.636439][ T6816] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.642353][ T6816] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.647822][ T6816] ? ext4_ext_release+0x10/0x10 [ 64.652705][ T6816] ? down_write_killable+0x170/0x170 [ 64.658239][ T6816] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.663692][ T6816] ext4_map_blocks+0x4cb/0x1640 [ 64.668528][ T6816] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.673718][ T6816] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.679252][ T6816] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.685228][ T6816] ? prandom_u32_state+0xe/0x170 [ 64.690146][ T6816] ? __brelse+0x84/0xa0 [ 64.694294][ T6816] ? __ext4_new_inode+0x144/0x55e0 [ 64.699385][ T6816] ext4_getblk+0xad/0x520 [ 64.703696][ T6816] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 64.709397][ T6816] ? ext4_free_inode+0x1700/0x1700 [ 64.714595][ T6816] ext4_bread+0x7c/0x380 [ 64.718819][ T6816] ? ext4_getblk+0x520/0x520 [ 64.723386][ T6816] ? dquot_get_next_dqblk+0x180/0x180 [ 64.728749][ T6816] ext4_append+0x153/0x360 [ 64.733156][ T6816] ext4_mkdir+0x5e0/0xdf0 [ 64.737465][ T6816] ? ext4_rmdir+0xde0/0xde0 [ 64.742152][ T6816] ? security_inode_permission+0xc4/0xf0 [ 64.747884][ T6816] vfs_mkdir+0x419/0x690 [ 64.752115][ T6816] do_mkdirat+0x21e/0x280 [ 64.757344][ T6816] ? __ia32_sys_mknod+0xb0/0xb0 [ 64.762204][ T6816] ? do_syscall_64+0x1c/0xe0 [ 64.767220][ T6816] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.773189][ T6816] do_syscall_64+0x60/0xe0 [ 64.777606][ T6816] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.784248][ T6816] RIP: 0033:0x45bed7 [ 64.788117][ T6816] Code: Bad RIP value. [ 64.792182][ T6816] RSP: 002b:00007fff2b360ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 64.800583][ T6816] RAX: ffffffffffffffda RBX: 000000000078c988 RCX: 000000000045bed7 [ 64.809069][ T6816] RDX: 00007fff2b360b03 RSI: 00000000000001ff RDI: 00007fff2b360b00 [ 64.817030][ T6816] RBP: 00000000000000f8 R08: 0000000000000000 R09: 0000000000000003 [ 64.824986][ T6816] R10: 0000000000000064 R11: 0000000000000206 R12: 00000000004185c0 [ 64.832951][ T6816] R13: 00007fff2b360af0 R14: 0000000000000000 R15: 00007fff2b360b00 [ 64.888535][ T6816] BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor.0/6816 [ 64.898038][ T6816] caller is ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.904033][ T6816] CPU: 0 PID: 6816 Comm: syz-executor.0 Not tainted 5.8.0-rc1-syzkaller #0 [ 64.912629][ T6816] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.922944][ T6816] Call Trace: [ 64.927374][ T6816] dump_stack+0x18f/0x20d [ 64.931807][ T6816] check_preemption_disabled+0x20d/0x220 [ 64.938604][ T6816] ext4_mb_new_blocks+0xa4d/0x3b70 [ 64.943743][ T6816] ? ext4_ext_search_right+0x2ca/0xb20 [ 64.949323][ T6816] ? ext4_inode_to_goal_block+0x2df/0x3f0 [ 64.955156][ T6816] ext4_ext_map_blocks+0x201b/0x33e0 [ 64.960796][ T6816] ? ext4_ext_release+0x10/0x10 [ 64.966220][ T6816] ? down_write_killable+0x170/0x170 [ 64.971526][ T6816] ? ext4_es_lookup_extent+0x41d/0xd10 [ 64.976985][ T6816] ext4_map_blocks+0x4cb/0x1640 [ 64.981851][ T6816] ? ext4_issue_zeroout+0x1e0/0x1e0 [ 64.987060][ T6816] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 64.992604][ T6816] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 64.999344][ T6816] ? prandom_u32_state+0xe/0x170 [ 65.004280][ T6816] ? __brelse+0x84/0xa0 [ 65.008455][ T6816] ? __ext4_new_inode+0x144/0x55e0 [ 65.013563][ T6816] ext4_getblk+0xad/0x520 [ 65.018063][ T6816] ? ext4_iomap_overwrite_begin+0xa0/0xa0 [ 65.024469][ T6816] ? ext4_free_inode+0x1700/0x1700 [ 65.029568][ T6816] ext4_bread+0x7c/0x380 [ 65.033876][ T6816] ? ext4_getblk+0x520/0x520 [ 65.038469][ T6816] ? dquot_get_next_dqblk+0x180/0x180 [ 65.043838][ T6816] ext4_append+0x153/0x360 [ 65.048252][ T6816] ext4_mkdir+0x5e0/0xdf0 [ 65.053001][ T6816] ? ext4_rmdir+0xde0/0xde0 [ 65.057571][ T6816] ? security_inode_permission+0xc4/0xf0 [ 65.063203][ T6816] vfs_mkdir+0x419/0x690 [ 65.067688][ T6816] do_mkdirat+0x21e/0x280 [ 65.072285][ T6816] ? __ia32_sys_mknod+0xb0/0xb0 [ 65.078103][ T6816] ? do_syscall_64+0x1c/0xe0 [ 65.082681][ T6816] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.088640][ T6816] do_syscall_64+0x60/0xe0 [ 65.093113][ T6816] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 65.099241][ T6816] RIP: 0033:0x45bed7 [ 65.103136][ T6816] Code: Bad RIP value. [ 65.107201][ T6816] RSP: 002b:00007fff2b360ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000053 [ 65.115959][ T6816] RAX: ffffffffffffffda RBX: 000000000000fd7a RCX: 000000000045bed7 [ 65.124023][ T6816] RDX: 00007fff2b360b03 RSI: 00000000000001ff RDI: 00007fff2b360b00 2020/06/18 08:14:49 building call list... [ 65.131982][ T6816] RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000003 [ 65.140522][ T6816] R10: 0000000000000064 R11: 0000000000000206 R12: 0000000000000003 [ 65.148507][ T6816] R13: 00007fff2b360af0 R14: 000000000000fd70 R15: 00007fff2b360b00 [ 65.423142][ T341] tipc: TX() has been purged, node left! [ 65.925026][ T341] ================================================================== [ 65.933361][ T341] BUG: KASAN: use-after-free in afs_wake_up_async_call+0x6aa/0x770 [ 65.941278][ T341] Write of size 1 at addr ffff88809df211e4 by task kworker/u4:4/341 [ 65.949265][ T341] [ 65.951596][ T341] CPU: 1 PID: 341 Comm: kworker/u4:4 Not tainted 5.8.0-rc1-syzkaller #0 [ 65.959995][ T341] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.970057][ T341] Workqueue: netns cleanup_net [ 65.974810][ T341] Call Trace: [ 65.978102][ T341] dump_stack+0x18f/0x20d [ 65.982460][ T341] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.988086][ T341] ? afs_wake_up_async_call+0x6aa/0x770 [ 65.993802][ T341] ? afs_put_call+0xa40/0xa40 [ 65.998503][ T341] print_address_description.constprop.0.cold+0xd3/0x413 [ 66.005552][ T341] ? vprintk_func+0x97/0x1a6 [ 66.010499][ T341] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.016350][ T341] kasan_report.cold+0x1f/0x37 [ 66.021117][ T341] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.026746][ T341] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.032297][ T341] afs_wake_up_async_call+0x6aa/0x770 [ 66.037663][ T341] ? afs_close_socket+0x320/0x320 [ 66.042948][ T341] ? afs_put_call+0xa40/0xa40 [ 66.047624][ T341] rxrpc_notify_socket+0x1db/0x5d0 [ 66.052824][ T341] ? afs_put_call+0xa40/0xa40 [ 66.057934][ T341] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.064369][ T341] rxrpc_call_completed+0xca/0xf0 [ 66.069399][ T341] rxrpc_discard_prealloc+0x781/0xab0 [ 66.074773][ T341] ? lock_sock_nested+0x94/0x110 [ 66.079717][ T341] rxrpc_listen+0x147/0x360 [ 66.084221][ T341] afs_close_socket+0x95/0x320 [ 66.089067][ T341] ? afs_purge_servers+0x16d/0x300 [ 66.094280][ T341] ? afs_rx_discard_new_call+0x50/0x50 [ 66.099741][ T341] ? init_wait_var_entry+0x200/0x200 [ 66.105044][ T341] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.110685][ T341] ? check_preemption_disabled+0x38/0x220 [ 66.116407][ T341] afs_net_exit+0x1bc/0x310 [ 66.121345][ T341] ? afs_net_init+0xe30/0xe30 [ 66.126037][ T341] ops_exit_list.isra.0+0xa8/0x150 [ 66.131158][ T341] cleanup_net+0x511/0xa50 [ 66.135583][ T341] ? unregister_pernet_device+0x70/0x70 [ 66.141707][ T341] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.147709][ T341] process_one_work+0x965/0x1690 [ 66.152665][ T341] ? lock_release+0x800/0x800 [ 66.157340][ T341] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.162975][ T341] ? rwlock_bug.part.0+0x90/0x90 [ 66.167924][ T341] worker_thread+0x96/0xe10 [ 66.172455][ T341] ? process_one_work+0x1690/0x1690 [ 66.178574][ T341] kthread+0x3b5/0x4a0 [ 66.182643][ T341] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.189401][ T341] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.195210][ T341] ret_from_fork+0x1f/0x30 [ 66.199637][ T341] [ 66.201958][ T341] Allocated by task 6816: [ 66.206288][ T341] save_stack+0x1b/0x40 [ 66.210439][ T341] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 66.216066][ T341] kmem_cache_alloc_trace+0x153/0x7d0 [ 66.221436][ T341] afs_alloc_call+0x55/0x630 [ 66.226030][ T341] afs_charge_preallocation+0xe9/0x2d0 [ 66.231484][ T341] afs_open_socket+0x292/0x360 [ 66.236240][ T341] afs_net_init+0xa6c/0xe30 [ 66.240737][ T341] ops_init+0xaf/0x420 [ 66.244797][ T341] setup_net+0x2de/0x860 [ 66.249038][ T341] copy_net_ns+0x293/0x590 [ 66.253602][ T341] create_new_namespaces+0x3fb/0xb30 [ 66.258891][ T341] unshare_nsproxy_namespaces+0xbd/0x1f0 [ 66.264608][ T341] ksys_unshare+0x43d/0x8e0 [ 66.269107][ T341] __x64_sys_unshare+0x2d/0x40 [ 66.273870][ T341] do_syscall_64+0x60/0xe0 [ 66.278312][ T341] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 66.284576][ T341] [ 66.286906][ T341] Freed by task 341: [ 66.290800][ T341] save_stack+0x1b/0x40 [ 66.295670][ T341] __kasan_slab_free+0xf7/0x140 [ 66.300522][ T341] kfree+0x109/0x2b0 [ 66.304422][ T341] afs_put_call+0x585/0xa40 [ 66.308944][ T341] rxrpc_discard_prealloc+0x764/0xab0 [ 66.314350][ T341] rxrpc_listen+0x147/0x360 [ 66.318869][ T341] afs_close_socket+0x95/0x320 [ 66.323659][ T341] afs_net_exit+0x1bc/0x310 [ 66.328159][ T341] ops_exit_list.isra.0+0xa8/0x150 [ 66.333283][ T341] cleanup_net+0x511/0xa50 [ 66.337698][ T341] process_one_work+0x965/0x1690 [ 66.342742][ T341] worker_thread+0x96/0xe10 [ 66.347328][ T341] kthread+0x3b5/0x4a0 [ 66.351417][ T341] ret_from_fork+0x1f/0x30 [ 66.355915][ T341] [ 66.358257][ T341] The buggy address belongs to the object at ffff88809df21000 [ 66.358257][ T341] which belongs to the cache kmalloc-1k of size 1024 [ 66.372321][ T341] The buggy address is located 484 bytes inside of [ 66.372321][ T341] 1024-byte region [ffff88809df21000, ffff88809df21400) [ 66.385673][ T341] The buggy address belongs to the page: [ 66.391329][ T341] page:ffffea000277c840 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88809df21800 [ 66.401862][ T341] flags: 0xfffe0000000200(slab) [ 66.406728][ T341] raw: 00fffe0000000200 ffffea00028ef248 ffff8880aa001840 ffff8880aa000c40 [ 66.415411][ T341] raw: ffff88809df21800 ffff88809df21000 0000000100000001 0000000000000000 [ 66.424007][ T341] page dumped because: kasan: bad access detected [ 66.430419][ T341] [ 66.432742][ T341] Memory state around the buggy address: [ 66.438368][ T341] ffff88809df21080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.446552][ T341] ffff88809df21100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.454646][ T341] >ffff88809df21180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.462700][ T341] ^ [ 66.469909][ T341] ffff88809df21200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.477974][ T341] ffff88809df21280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.486037][ T341] ================================================================== [ 66.494088][ T341] Disabling lock debugging due to kernel taint [ 66.500338][ T341] Kernel panic - not syncing: panic_on_warn set ... [ 66.506928][ T341] CPU: 1 PID: 341 Comm: kworker/u4:4 Tainted: G B 5.8.0-rc1-syzkaller #0 [ 66.516729][ T341] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.526920][ T341] Workqueue: netns cleanup_net [ 66.531675][ T341] Call Trace: [ 66.534967][ T341] dump_stack+0x18f/0x20d [ 66.539302][ T341] ? afs_wake_up_async_call+0x680/0x770 [ 66.544928][ T341] ? afs_put_call+0xa40/0xa40 [ 66.549602][ T341] panic+0x2e3/0x75c [ 66.553502][ T341] ? __warn_printk+0xf3/0xf3 [ 66.558088][ T341] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 66.564266][ T341] ? trace_hardirqs_on+0x55/0x220 [ 66.569403][ T341] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.574939][ T341] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.581436][ T341] ? afs_put_call+0xa40/0xa40 [ 66.586108][ T341] end_report+0x4d/0x53 [ 66.590267][ T341] kasan_report.cold+0xd/0x37 [ 66.594976][ T341] ? rcu_read_lock_held_common+0x51/0xa0 [ 66.600601][ T341] ? afs_wake_up_async_call+0x6aa/0x770 [ 66.606138][ T341] afs_wake_up_async_call+0x6aa/0x770 [ 66.611505][ T341] ? afs_close_socket+0x320/0x320 [ 66.616527][ T341] ? afs_put_call+0xa40/0xa40 [ 66.621227][ T341] rxrpc_notify_socket+0x1db/0x5d0 [ 66.626339][ T341] ? afs_put_call+0xa40/0xa40 [ 66.631569][ T341] __rxrpc_set_call_completion.part.0+0x172/0x410 [ 66.637982][ T341] rxrpc_call_completed+0xca/0xf0 [ 66.643091][ T341] rxrpc_discard_prealloc+0x781/0xab0 [ 66.648463][ T341] ? lock_sock_nested+0x94/0x110 [ 66.653396][ T341] rxrpc_listen+0x147/0x360 [ 66.659196][ T341] afs_close_socket+0x95/0x320 [ 66.663955][ T341] ? afs_purge_servers+0x16d/0x300 [ 66.669083][ T341] ? afs_rx_discard_new_call+0x50/0x50 [ 66.674539][ T341] ? init_wait_var_entry+0x200/0x200 [ 66.679821][ T341] ? rcu_read_lock_held_common+0xa0/0xa0 [ 66.685470][ T341] ? check_preemption_disabled+0x38/0x220 [ 66.691184][ T341] afs_net_exit+0x1bc/0x310 [ 66.695686][ T341] ? afs_net_init+0xe30/0xe30 [ 66.700356][ T341] ops_exit_list.isra.0+0xa8/0x150 [ 66.705472][ T341] cleanup_net+0x511/0xa50 [ 66.709974][ T341] ? unregister_pernet_device+0x70/0x70 [ 66.715555][ T341] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 66.721713][ T341] process_one_work+0x965/0x1690 [ 66.726847][ T341] ? lock_release+0x800/0x800 [ 66.731523][ T341] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.736926][ T341] ? rwlock_bug.part.0+0x90/0x90 [ 66.741871][ T341] worker_thread+0x96/0xe10 [ 66.746374][ T341] ? process_one_work+0x1690/0x1690 [ 66.751566][ T341] kthread+0x3b5/0x4a0 [ 66.755635][ T341] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.761521][ T341] ? kthread_mod_delayed_work+0x1a0/0x1a0 [ 66.767238][ T341] ret_from_fork+0x1f/0x30 [ 66.773315][ T341] Kernel Offset: disabled [ 66.777660][ T341] Rebooting in 86400 seconds..