Warning: Permanently added '10.128.0.165' (ECDSA) to the list of known hosts. executing program [ 90.179892][ T35] audit: type=1400 audit(1610050160.531:8): avc: denied { execmem } for pid=8471 comm="syz-executor685" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 90.184583][ T8471] ================================================================== [ 90.208931][ T8471] BUG: KASAN: null-ptr-deref in bdi_put+0x22/0xa0 [ 90.215530][ T8471] Write of size 4 at addr 0000000000000040 by task syz-executor685/8471 [ 90.223880][ T8471] [ 90.226214][ T8471] CPU: 1 PID: 8471 Comm: syz-executor685 Not tainted 5.11.0-rc2-syzkaller #0 [ 90.235076][ T8471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.245163][ T8471] Call Trace: [ 90.248452][ T8471] dump_stack+0x107/0x163 [ 90.252794][ T8471] ? bdi_put+0x22/0xa0 [ 90.256858][ T8471] ? bdi_put+0x22/0xa0 [ 90.261031][ T8471] kasan_report.cold+0x5f/0xd5 [ 90.265798][ T8471] ? bdi_put+0x22/0xa0 [ 90.269873][ T8471] check_memory_region+0x13d/0x180 [ 90.274999][ T8471] bdi_put+0x22/0xa0 [ 90.278903][ T8471] bdev_evict_inode+0x262/0x460 [ 90.283740][ T8471] ? __blkdev_direct_IO_simple+0x930/0x930 [ 90.289538][ T8471] evict+0x2ed/0x6b0 [ 90.293448][ T8471] iput.part.0+0x57e/0x810 [ 90.297863][ T8471] ? find_inode_nowait+0x190/0x190 [ 90.302975][ T8471] iput+0x58/0x70 [ 90.306626][ T8471] dentry_unlink_inode+0x2b1/0x3d0 [ 90.311737][ T8471] __dentry_kill+0x3c0/0x640 [ 90.316491][ T8471] ? dput+0x35/0xbc0 [ 90.320484][ T8471] ? dput+0x35/0xbc0 [ 90.324408][ T8471] dput+0x725/0xbc0 [ 90.328253][ T8471] shrink_dcache_for_umount+0x11f/0x330 [ 90.333793][ T8471] ? lockdep_hardirqs_on+0x79/0x100 [ 90.339018][ T8471] generic_shutdown_super+0x68/0x370 [ 90.344317][ T8471] kill_anon_super+0x36/0x60 [ 90.348927][ T8471] deactivate_locked_super+0x94/0x160 [ 90.354300][ T8471] deactivate_super+0xad/0xd0 [ 90.359238][ T8471] put_fs_context+0xaa/0x650 [ 90.363859][ T8471] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 90.370106][ T8471] fscontext_release+0x4c/0x60 [ 90.374887][ T8471] __fput+0x283/0x920 [ 90.378911][ T8471] ? fs_validate_description+0x1d0/0x1d0 [ 90.384552][ T8471] task_work_run+0xdd/0x190 [ 90.389106][ T8471] do_exit+0xc5c/0x2ae0 [ 90.393538][ T8471] ? rcu_read_lock_sched_held+0x3a/0x70 [ 90.399080][ T8471] ? mm_update_next_owner+0x7a0/0x7a0 [ 90.404448][ T8471] ? __do_sys_fsconfig+0x1c2/0xbd0 [ 90.409578][ T8471] ? fscontext_read+0x310/0x310 [ 90.414462][ T8471] do_group_exit+0x125/0x310 [ 90.419046][ T8471] __x64_sys_exit_group+0x3a/0x50 [ 90.424116][ T8471] do_syscall_64+0x2d/0x70 [ 90.428538][ T8471] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 90.434447][ T8471] RIP: 0033:0x43ee78 [ 90.438363][ T8471] Code: Unable to access opcode bytes at RIP 0x43ee4e. [ 90.445322][ T8471] RSP: 002b:00007fff8a4cc5a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 90.453738][ T8471] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee78 [ 90.461715][ T8471] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 90.469703][ T8471] RBP: 00000000004be688 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 90.477686][ T8471] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 90.485663][ T8471] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 90.494091][ T8471] ================================================================== [ 90.502139][ T8471] Disabling lock debugging due to kernel taint [ 90.508426][ T8471] Kernel panic - not syncing: panic_on_warn set ... [ 90.515541][ T8471] CPU: 1 PID: 8471 Comm: syz-executor685 Tainted: G B 5.11.0-rc2-syzkaller #0 [ 90.525705][ T8471] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 90.535954][ T8471] Call Trace: [ 90.539221][ T8471] dump_stack+0x107/0x163 [ 90.543558][ T8471] ? bdi_alloc+0xf0/0x140 [ 90.547907][ T8471] panic+0x306/0x73d [ 90.551803][ T8471] ? __warn_printk+0xf3/0xf3 [ 90.556378][ T8471] ? preempt_schedule_common+0x59/0xc0 [ 90.562169][ T8471] ? bdi_put+0x22/0xa0 [ 90.566539][ T8471] ? preempt_schedule_thunk+0x16/0x18 [ 90.571893][ T8471] ? trace_hardirqs_on+0x38/0x1c0 [ 90.576919][ T8471] ? trace_hardirqs_on+0x51/0x1c0 [ 90.581946][ T8471] ? bdi_put+0x22/0xa0 [ 90.586013][ T8471] ? bdi_put+0x22/0xa0 [ 90.590073][ T8471] end_report+0x58/0x5e [ 90.594319][ T8471] kasan_report.cold+0x67/0xd5 [ 90.599076][ T8471] ? bdi_put+0x22/0xa0 [ 90.603136][ T8471] check_memory_region+0x13d/0x180 [ 90.608235][ T8471] bdi_put+0x22/0xa0 [ 90.612124][ T8471] bdev_evict_inode+0x262/0x460 [ 90.616956][ T8471] ? __blkdev_direct_IO_simple+0x930/0x930 [ 90.622757][ T8471] evict+0x2ed/0x6b0 [ 90.626657][ T8471] iput.part.0+0x57e/0x810 [ 90.631145][ T8471] ? find_inode_nowait+0x190/0x190 [ 90.636260][ T8471] iput+0x58/0x70 [ 90.639886][ T8471] dentry_unlink_inode+0x2b1/0x3d0 [ 90.644981][ T8471] __dentry_kill+0x3c0/0x640 [ 90.649651][ T8471] ? dput+0x35/0xbc0 [ 90.653535][ T8471] ? dput+0x35/0xbc0 [ 90.657409][ T8471] dput+0x725/0xbc0 [ 90.661201][ T8471] shrink_dcache_for_umount+0x11f/0x330 [ 90.666729][ T8471] ? lockdep_hardirqs_on+0x79/0x100 [ 90.672167][ T8471] generic_shutdown_super+0x68/0x370 [ 90.677451][ T8471] kill_anon_super+0x36/0x60 [ 90.682034][ T8471] deactivate_locked_super+0x94/0x160 [ 90.687394][ T8471] deactivate_super+0xad/0xd0 [ 90.692062][ T8471] put_fs_context+0xaa/0x650 [ 90.696658][ T8471] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80 [ 90.702917][ T8471] fscontext_release+0x4c/0x60 [ 90.707677][ T8471] __fput+0x283/0x920 [ 90.711913][ T8471] ? fs_validate_description+0x1d0/0x1d0 [ 90.717551][ T8471] task_work_run+0xdd/0x190 [ 90.722062][ T8471] do_exit+0xc5c/0x2ae0 [ 90.726380][ T8471] ? rcu_read_lock_sched_held+0x3a/0x70 [ 90.732450][ T8471] ? mm_update_next_owner+0x7a0/0x7a0 [ 90.737814][ T8471] ? __do_sys_fsconfig+0x1c2/0xbd0 [ 90.742921][ T8471] ? fscontext_read+0x310/0x310 [ 90.747852][ T8471] do_group_exit+0x125/0x310 [ 90.752430][ T8471] __x64_sys_exit_group+0x3a/0x50 [ 90.757503][ T8471] do_syscall_64+0x2d/0x70 [ 90.761953][ T8471] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 90.767856][ T8471] RIP: 0033:0x43ee78 [ 90.771771][ T8471] Code: Unable to access opcode bytes at RIP 0x43ee4e. [ 90.778597][ T8471] RSP: 002b:00007fff8a4cc5a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 90.787014][ T8471] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043ee78 [ 90.795229][ T8471] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 90.803189][ T8471] RBP: 00000000004be688 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 90.811245][ T8471] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 90.819207][ T8471] R13: 00000000006d0180 R14: 0000000000000000 R15: 0000000000000000 [ 90.828029][ T8471] Kernel Offset: disabled [ 90.832352][ T8471] Rebooting in 86400 seconds..