[....] Starting enhanced syslogd: rsyslogd[ 16.777747] audit: type=1400 audit(1521531655.140:5): avc: denied { syslog } for pid=4090 comm="rsyslogd" capability=34 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=capability2 permissive=1 [?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.082149] audit: type=1400 audit(1521531660.444:6): avc: denied { map } for pid=4230 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts. [ 28.382121] audit: type=1400 audit(1521531666.744:7): avc: denied { map } for pid=4244 comm="syz-execprog" path="/root/syz-execprog" dev="sda1" ino=16479 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 2018/03/20 07:41:06 parsed 1 programs 2018/03/20 07:41:06 executed programs: 0 [ 28.633732] audit: type=1400 audit(1521531666.996:8): avc: denied { map } for pid=4244 comm="syz-execprog" path="/root/syzkaller-shm186793061" dev="sda1" ino=16482 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:file_t:s0 tclass=file permissive=1 [ 28.668794] IPVS: ftp: loaded support on port[0] = 21 [ 28.709329] IPVS: ftp: loaded support on port[0] = 21 [ 28.745973] IPVS: ftp: loaded support on port[0] = 21 [ 28.784124] IPVS: ftp: loaded support on port[0] = 21 [ 28.835765] IPVS: ftp: loaded support on port[0] = 21 [ 28.875278] IPVS: ftp: loaded support on port[0] = 21 [ 28.928389] IPVS: ftp: loaded support on port[0] = 21 [ 28.967732] IPVS: ftp: loaded support on port[0] = 21 [ 29.035608] ================================================================== [ 29.043103] BUG: KASAN: null-ptr-deref in rdma_resolve_addr+0x12e/0x26c0 [ 29.049932] Write of size 28 at addr 00000000000000a0 by task syz-executor6/4406 [ 29.057448] [ 29.059066] CPU: 1 PID: 4406 Comm: syz-executor6 Not tainted 4.16.0-rc6+ #270 [ 29.066323] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.075663] Call Trace: [ 29.078251] dump_stack+0x194/0x24d [ 29.081878] ? arch_local_irq_restore+0x53/0x53 [ 29.086542] ? __might_sleep+0x95/0x190 [ 29.090517] ? rdma_resolve_addr+0x12e/0x26c0 [ 29.095011] kasan_report+0x140/0x360 [ 29.098808] check_memory_region+0x137/0x190 [ 29.103207] memcpy+0x37/0x50 [ 29.106311] rdma_resolve_addr+0x12e/0x26c0 [ 29.110653] ? find_held_lock+0x35/0x1d0 [ 29.114720] ? rdma_bind_addr+0x1b50/0x1b50 [ 29.119034] ? lock_downgrade+0x980/0x980 [ 29.123186] ? __radix_tree_lookup+0x435/0x5e0 [ 29.127786] ? __mutex_unlock_slowpath+0xe9/0xac0 [ 29.132628] ? wait_for_completion+0x770/0x770 [ 29.137220] ? lock_release+0xa40/0xa40 [ 29.141185] ? check_same_owner+0x320/0x320 [ 29.145501] ? find_held_lock+0x35/0x1d0 [ 29.149600] ucma_resolve_ip+0x142/0x1f0 [ 29.153652] ? ucma_resolve_ip+0x142/0x1f0 [ 29.157887] ? ucma_resolve_addr+0x330/0x330 [ 29.162306] ? kasan_check_write+0x14/0x20 [ 29.166544] ucma_write+0x2d6/0x3d0 [ 29.170159] ? ucma_resolve_addr+0x330/0x330 [ 29.174558] ? ucma_resolve_route+0x1a0/0x1a0 [ 29.179056] ? ucma_resolve_route+0x1a0/0x1a0 [ 29.183538] __vfs_write+0xef/0x970 [ 29.187149] ? rcu_note_context_switch+0x710/0x710 [ 29.192073] ? kernel_read+0x120/0x120 [ 29.195946] ? __might_sleep+0x95/0x190 [ 29.199897] ? _cond_resched+0x14/0x30 [ 29.203757] ? __inode_security_revalidate+0xd9/0x130 [ 29.208918] ? avc_policy_seqno+0x9/0x20 [ 29.212949] ? selinux_file_permission+0x82/0x460 [ 29.217768] ? security_file_permission+0x89/0x1e0 [ 29.222673] ? rw_verify_area+0xe5/0x2b0 [ 29.226705] ? __fdget_raw+0x20/0x20 [ 29.230393] vfs_write+0x189/0x510 [ 29.233911] SyS_write+0xef/0x220 [ 29.237341] ? SyS_read+0x220/0x220 [ 29.240943] ? do_fast_syscall_32+0x156/0xf9f [ 29.245411] ? SyS_read+0x220/0x220 [ 29.249012] do_fast_syscall_32+0x3ec/0xf9f [ 29.253311] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.257781] ? do_int80_syscall_32+0x9c0/0x9c0 [ 29.262341] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.266808] ? finish_task_switch+0x1c1/0x7e0 [ 29.271277] ? syscall_return_slowpath+0x2ac/0x550 [ 29.276180] ? prepare_exit_to_usermode+0x350/0x350 [ 29.281172] ? sysret32_from_system_call+0x5/0x3c [ 29.285991] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.290814] entry_SYSENTER_compat+0x70/0x7f [ 29.295193] RIP: 0023:0xf7fbbc99 [ 29.298529] RSP: 002b:00000000f7f9609c EFLAGS: 00000286 ORIG_RAX: 0000000000000004 [ 29.306210] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000540 [ 29.313454] RDX: 0000000000000048 RSI: 0000000000000000 RDI: 0000000000000000 [ 29.320696] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 29.327936] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 29.335185] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 29.342450] ================================================================== [ 29.349778] Disabling lock debugging due to kernel taint [ 29.355387] Kernel panic - not syncing: panic_on_warn set ... [ 29.355387] [ 29.362739] CPU: 1 PID: 4406 Comm: syz-executor6 Tainted: G B 4.16.0-rc6+ #270 [ 29.371296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.380636] Call Trace: [ 29.383216] dump_stack+0x194/0x24d [ 29.386830] ? arch_local_irq_restore+0x53/0x53 [ 29.391475] ? kasan_end_report+0x32/0x50 [ 29.395598] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 29.400324] ? vsnprintf+0x1ed/0x1900 [ 29.404097] ? rdma_resolve_addr+0x40/0x26c0 [ 29.408480] panic+0x1e4/0x41c [ 29.411649] ? refcount_error_report+0x214/0x214 [ 29.416378] ? add_taint+0x1c/0x50 [ 29.419889] ? add_taint+0x1c/0x50 [ 29.423407] ? rdma_resolve_addr+0x12e/0x26c0 [ 29.427872] kasan_end_report+0x50/0x50 [ 29.431815] kasan_report+0x149/0x360 [ 29.435589] check_memory_region+0x137/0x190 [ 29.439966] memcpy+0x37/0x50 [ 29.443048] rdma_resolve_addr+0x12e/0x26c0 [ 29.447345] ? find_held_lock+0x35/0x1d0 [ 29.451381] ? rdma_bind_addr+0x1b50/0x1b50 [ 29.455675] ? lock_downgrade+0x980/0x980 [ 29.459808] ? __radix_tree_lookup+0x435/0x5e0 [ 29.464367] ? __mutex_unlock_slowpath+0xe9/0xac0 [ 29.469179] ? wait_for_completion+0x770/0x770 [ 29.473739] ? lock_release+0xa40/0xa40 [ 29.477685] ? check_same_owner+0x320/0x320 [ 29.481978] ? find_held_lock+0x35/0x1d0 [ 29.486033] ucma_resolve_ip+0x142/0x1f0 [ 29.490068] ? ucma_resolve_ip+0x142/0x1f0 [ 29.494278] ? ucma_resolve_addr+0x330/0x330 [ 29.498660] ? kasan_check_write+0x14/0x20 [ 29.502874] ucma_write+0x2d6/0x3d0 [ 29.506469] ? ucma_resolve_addr+0x330/0x330 [ 29.510847] ? ucma_resolve_route+0x1a0/0x1a0 [ 29.515314] ? ucma_resolve_route+0x1a0/0x1a0 [ 29.519779] __vfs_write+0xef/0x970 [ 29.523378] ? rcu_note_context_switch+0x710/0x710 [ 29.528278] ? kernel_read+0x120/0x120 [ 29.532150] ? __might_sleep+0x95/0x190 [ 29.536099] ? _cond_resched+0x14/0x30 [ 29.539959] ? __inode_security_revalidate+0xd9/0x130 [ 29.545118] ? avc_policy_seqno+0x9/0x20 [ 29.549151] ? selinux_file_permission+0x82/0x460 [ 29.553970] ? security_file_permission+0x89/0x1e0 [ 29.558870] ? rw_verify_area+0xe5/0x2b0 [ 29.562898] ? __fdget_raw+0x20/0x20 [ 29.566580] vfs_write+0x189/0x510 [ 29.570090] SyS_write+0xef/0x220 [ 29.573515] ? SyS_read+0x220/0x220 [ 29.577113] ? do_fast_syscall_32+0x156/0xf9f [ 29.581577] ? SyS_read+0x220/0x220 [ 29.585174] do_fast_syscall_32+0x3ec/0xf9f [ 29.589465] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.593932] ? do_int80_syscall_32+0x9c0/0x9c0 [ 29.598481] ? _raw_spin_unlock_irq+0x27/0x70 [ 29.602947] ? finish_task_switch+0x1c1/0x7e0 [ 29.607413] ? syscall_return_slowpath+0x2ac/0x550 [ 29.612312] ? prepare_exit_to_usermode+0x350/0x350 [ 29.617297] ? sysret32_from_system_call+0x5/0x3c [ 29.622113] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 29.626926] entry_SYSENTER_compat+0x70/0x7f [ 29.631305] RIP: 0023:0xf7fbbc99 [ 29.634637] RSP: 002b:00000000f7f9609c EFLAGS: 00000286 ORIG_RAX: 0000000000000004 [ 29.642310] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000540 [ 29.649547] RDX: 0000000000000048 RSI: 0000000000000000 RDI: 0000000000000000 [ 29.656788] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 29.664029] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 29.671270] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 29.679393] Dumping ftrace buffer: [ 29.682902] (ftrace buffer empty) [ 29.686580] Kernel Offset: disabled [ 29.690176] Rebooting in 86400 seconds..