syzkaller syzkaller login: [ 10.774867][ T2752] udevd (2752) used greatest stack depth: 11856 bytes left [ 16.863348][ T23] kauditd_printk_skb: 38 callbacks suppressed [ 16.863355][ T23] audit: type=1400 audit(1680991443.814:72): avc: denied { transition } for pid=3008 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 16.868690][ T23] audit: type=1400 audit(1680991443.814:73): avc: denied { write } for pid=3008 comm="sh" path="pipe:[15297]" dev="pipefs" ino=15297 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 17.904684][ T3032] scp (3032) used greatest stack depth: 11680 bytes left [ 17.914210][ T3009] sshd (3009) used greatest stack depth: 11664 bytes left Warning: Permanently added '10.128.0.182' (ECDSA) to the list of known hosts. 2023/04/08 22:04:10 fuzzer started 2023/04/08 22:04:10 dialing manager at 10.128.0.163:39891 [ 24.028738][ T23] audit: type=1400 audit(1680991450.974:74): avc: denied { mounton } for pid=3116 comm="syz-executor" path="/syzcgroup/unified" dev="sda1" ino=1136 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:root_t tclass=dir permissive=1 [ 24.029739][ T3116] cgroup: Unknown subsys name 'net' [ 24.051447][ T23] audit: type=1400 audit(1680991450.974:75): avc: denied { mount } for pid=3116 comm="syz-executor" name="/" dev="cgroup2" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 24.078907][ T23] audit: type=1400 audit(1680991451.004:76): avc: denied { unmount } for pid=3116 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 24.190169][ T3116] cgroup: Unknown subsys name 'rlimit' 2023/04/08 22:04:11 syscalls: 2854 2023/04/08 22:04:11 code coverage: enabled 2023/04/08 22:04:11 comparison tracing: enabled 2023/04/08 22:04:11 extra coverage: enabled 2023/04/08 22:04:11 delay kcov mmap: enabled 2023/04/08 22:04:11 setuid sandbox: enabled 2023/04/08 22:04:11 namespace sandbox: enabled 2023/04/08 22:04:11 Android sandbox: enabled 2023/04/08 22:04:11 fault injection: enabled 2023/04/08 22:04:11 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 2023/04/08 22:04:11 net packet injection: enabled 2023/04/08 22:04:11 net device setup: enabled 2023/04/08 22:04:11 concurrency sanitizer: enabled 2023/04/08 22:04:11 devlink PCI setup: PCI device 0000:00:10.0 is not available 2023/04/08 22:04:11 NIC VF setup: PCI device 0000:00:11.0 is not available 2023/04/08 22:04:11 USB emulation: /dev/raw-gadget does not exist 2023/04/08 22:04:11 hci packet injection: /dev/vhci does not exist 2023/04/08 22:04:11 wifi device emulation: /sys/class/mac80211_hwsim/ does not exist 2023/04/08 22:04:11 802.15.4 emulation: enabled 2023/04/08 22:04:11 suppressing KCSAN reports in functions: 'can_receive' 'generic_write_end' 'do_select' 'jbd2_journal_dirty_metadata' 'dont_mount' 'ext4_free_inodes_count' 'ext4_mpage_readpages' '__xa_clear_mark' 'shmem_file_read_iter' 'blk_mq_sched_dispatch_requests' 'pcpu_alloc' 'ext4_do_writepages' 'ext4_mark_iloc_dirty' 'netlink_dump' 'detach_buf_split' 'can_send' '__find_get_block' 'do_sys_poll' 'd_delete' 'exit_mm' 'ext4_fill_raw_inode' '__filemap_remove_folio' '__filemap_add_folio' 'xas_clear_mark' 'jbd2_journal_commit_transaction' '__xa_set_mark' [ 24.280050][ T23] audit: type=1400 audit(1680991451.234:77): avc: denied { mounton } for pid=3116 comm="syz-executor" path="/proc/sys/fs/binfmt_misc" dev="binfmt_misc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:binfmt_misc_fs_t tclass=dir permissive=1 [ 24.305484][ T23] audit: type=1400 audit(1680991451.244:78): avc: denied { mount } for pid=3116 comm="syz-executor" name="/" dev="binfmt_misc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:binfmt_misc_fs_t tclass=filesystem permissive=1 2023/04/08 22:04:11 fetching corpus: 0, signal 0/2000 (executing program) [ 24.328843][ T23] audit: type=1400 audit(1680991451.244:79): avc: denied { create } for pid=3116 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 24.349422][ T23] audit: type=1400 audit(1680991451.244:80): avc: denied { write } for pid=3116 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 24.370031][ T23] audit: type=1400 audit(1680991451.244:81): avc: denied { read } for pid=3116 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 2023/04/08 22:04:11 fetching corpus: 50, signal 17046/20852 (executing program) 2023/04/08 22:04:11 fetching corpus: 100, signal 25766/31342 (executing program) 2023/04/08 22:04:11 fetching corpus: 150, signal 32070/39349 (executing program) 2023/04/08 22:04:11 fetching corpus: 200, signal 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fetching corpus: 4400, signal 150624/252537 (executing program) [ 34.669067][ T0] ================================================================== [ 34.677157][ T0] BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_nohz_idle_stop_tick [ 34.686092][ T0] [ 34.688422][ T0] write to 0xffffffff85f014b0 of 4 bytes by task 0 on cpu 0: [ 34.695875][ T0] tick_nohz_idle_stop_tick+0x1cf/0x6a0 [ 34.701420][ T0] do_idle+0x177/0x240 [ 34.705477][ T0] cpu_startup_entry+0x18/0x20 [ 34.710226][ T0] rest_init+0xf1/0x100 [ 34.714385][ T0] arch_call_rest_init+0x9/0x10 [ 34.719218][ T0] start_kernel+0x58a/0x610 [ 34.723703][ T0] secondary_startup_64_no_verify+0xcf/0xdb [ 34.729582][ T0] [ 34.731890][ T0] read to 0xffffffff85f014b0 of 4 bytes by task 0 on cpu 1: [ 34.739161][ T0] tick_nohz_idle_stop_tick+0x1a7/0x6a0 [ 34.744693][ T0] do_idle+0x177/0x240 [ 34.748748][ T0] cpu_startup_entry+0x18/0x20 [ 34.753496][ T0] start_secondary+0x7c/0x80 [ 34.758076][ T0] secondary_startup_64_no_verify+0xcf/0xdb [ 34.763958][ T0] 2023/04/08 22:04:21 fetching corpus: 4450, signal 151305/254028 (executing program) [ 34.766298][ T0] value changed: 0x00000000 -> 0xffffffff [ 34.771995][ T0] [ 34.774301][ T0] Reported by Kernel Concurrency Sanitizer on: [ 34.780427][ T0] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.3.0-rc5-syzkaller-00202-ga79d5c76f705 #0 [ 34.790034][ T0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023 [ 34.800080][ T0] ================================================================== 2023/04/08 22:04:21 fetching corpus: 4500, signal 151819/255448 (executing program) 2023/04/08 22:04:22 fetching corpus: 4550, signal 152556/256932 (executing program) 2023/04/08 22:04:22 fetching corpus: 4600, signal 153370/258471 (executing program) 2023/04/08 22:04:22 fetching corpus: 4650, signal 153958/259907 (executing program) 2023/04/08 22:04:22 fetching corpus: 4700, signal 154495/261273 (executing program) 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