================================================================== BUG: KCSAN: data-race in yama_task_free / yama_task_free write to 0xffff88800a69b4d0 of 1 bytes by interrupt on cpu 1: yama_ptracer_del security/yama/yama_lsm.c:191 [inline] yama_task_free+0xc3/0x160 security/yama/yama_lsm.c:207 security_task_free+0x3f/0xa0 security/security.c:1597 __put_task_struct+0xc2/0x3a0 kernel/fork.c:736 put_task_struct include/linux/sched/task.h:111 [inline] delayed_put_task_struct+0x4e/0x130 kernel/exit.c:173 rcu_do_batch kernel/rcu/tree.c:2489 [inline] rcu_core+0x6a7/0xb80 kernel/rcu/tree.c:2723 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2736 __do_softirq+0x13c/0x2c3 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu+0xb4/0xc0 kernel/softirq.c:420 sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] console_unlock+0xa49/0xa60 arch/x86/include/asm/irqflags.h:84 vprintk_emit+0x112/0x360 kernel/printk/printk.c:2092 vprintk_default+0x22/0x30 kernel/printk/printk.c:2109 vprintk_func+0x11b/0x120 kernel/printk/printk_safe.c:393 printk+0x62/0x82 kernel/printk/printk.c:2140 __nla_validate_parse+0x1404/0x1730 lib/nlattr.c:600 __nla_parse+0x3c/0x50 lib/nlattr.c:685 __nlmsg_parse include/net/netlink.h:733 [inline] nlmsg_parse_deprecated_strict include/net/netlink.h:792 [inline] inet_netconf_valid_get_req net/ipv4/devinet.c:2136 [inline] inet_netconf_get_devconf+0x148/0x420 net/ipv4/devinet.c:2171 rtnetlink_rcv_msg+0x729/0x7c0 net/core/rtnetlink.c:5553 netlink_rcv_skb+0x13e/0x240 net/netlink/af_netlink.c:2494 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:5571 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x5fc/0x6c0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x6f8/0x7c0 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x360/0x4d0 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmsg+0x1ed/0x270 net/socket.c:2432 __do_sys_sendmsg net/socket.c:2441 [inline] __se_sys_sendmsg net/socket.c:2439 [inline] __x64_sys_sendmsg+0x42/0x50 net/socket.c:2439 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff88800a69b4d0 of 1 bytes by interrupt on cpu 0: yama_ptracer_del security/yama/yama_lsm.c:187 [inline] yama_task_free+0x5c/0x160 security/yama/yama_lsm.c:207 security_task_free+0x3f/0xa0 security/security.c:1597 __put_task_struct+0xc2/0x3a0 kernel/fork.c:736 put_task_struct include/linux/sched/task.h:111 [inline] delayed_put_task_struct+0x4e/0x130 kernel/exit.c:173 rcu_do_batch kernel/rcu/tree.c:2489 [inline] rcu_core+0x6a7/0xb80 kernel/rcu/tree.c:2723 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2736 __do_softirq+0x13c/0x2c3 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu+0xb4/0xc0 kernel/softirq.c:420 sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] console_trylock_spinning kernel/printk/printk.c:1805 [inline] vprintk_emit+0x210/0x360 kernel/printk/printk.c:2091 vprintk_default+0x22/0x30 kernel/printk/printk.c:2109 vprintk_func+0x11b/0x120 kernel/printk/printk_safe.c:393 printk+0x62/0x82 kernel/printk/printk.c:2140 fail_dump lib/fault-inject.c:45 [inline] should_fail+0x223/0x250 lib/fault-inject.c:146 should_fail_usercopy+0x16/0x20 lib/fault-inject-usercopy.c:37 copyin lib/iov_iter.c:155 [inline] iov_iter_copy_from_user_atomic+0x2c6/0x8f0 lib/iov_iter.c:1005 generic_perform_write+0x1e4/0x3a0 mm/filemap.c:3416 __generic_file_write_iter+0x15c/0x340 mm/filemap.c:3537 generic_file_write_iter+0x75/0x130 mm/filemap.c:3569 call_write_iter include/linux/fs.h:1901 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x6f0/0x7e0 fs/read_write.c:605 ksys_pwrite64 fs/read_write.c:712 [inline] __do_sys_pwrite64 fs/read_write.c:722 [inline] __se_sys_pwrite64 fs/read_write.c:719 [inline] __x64_sys_pwrite64+0xf5/0x150 fs/read_write.c:719 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 25886 Comm: syz-executor.1 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================