Hello,
syzbot found the following issue on:
HEAD commit: 131ad0b6 Merge tag 'acpi-5.10-rc5' of git://
git.kernel.org..
git tree: upstream
console output:
https://syzkaller.appspot.com/x/log.txt?x=13569b91500000
kernel config:
https://syzkaller.appspot.com/x/.config?x=e9a6e9171a00e85a
dashboard link:
https://syzkaller.appspot.com/bug?extid=a20793763dea40411f1b
compiler: clang version 12.0.0 (
https://github.com/llvm/llvm-project.git 913f6005669cfb590c99865a90bc51ed0983d09d)
CC: [
jmo...@namei.org kees...@chromium.org linux-...@vger.kernel.org linux-secu...@vger.kernel.org se...@hallyn.com]
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+a20793...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in yama_task_free / yama_task_free
write to 0xffff888022cf7190 of 1 bytes by interrupt on cpu 0:
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:1596
__put_task_struct+0xc2/0x3a0 kernel/fork.c:735
put_task_struct include/linux/sched/task.h:113 [inline]
delayed_put_task_struct+0x49/0x130 kernel/exit.c:172
rcu_do_batch kernel/rcu/tree.c:2476 [inline]
rcu_core+0x6bb/0xbc0 kernel/rcu/tree.c:2711
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2724
__do_softirq+0x12c/0x2b1 kernel/softirq.c:298
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:393 [inline]
__irq_exit_rcu+0xb2/0xc0 kernel/softirq.c:423
sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
kcsan_setup_watchpoint+0x1ec/0x4d0 kernel/kcsan/core.c:591
string_nocheck lib/vsprintf.c:611 [inline]
string+0x78/0x210 lib/vsprintf.c:693
vsnprintf+0xa90/0xe80 lib/vsprintf.c:2618
tomoyo_supervisor+0xa4/0xb20 security/tomoyo/common.c:2069
tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
tomoyo_path_permission security/tomoyo/file.c:587 [inline]
tomoyo_path_perm+0x261/0x330 security/tomoyo/file.c:838
tomoyo_inode_getattr+0x18/0x20 security/tomoyo/tomoyo.c:123
security_inode_getattr+0x7f/0xd0 security/security.c:1279
vfs_getattr fs/stat.c:121 [inline]
vfs_statx+0xf8/0x270 fs/stat.c:189
vfs_fstatat fs/stat.c:207 [inline]
vfs_lstat include/linux/fs.h:3125 [inline]
__do_sys_newlstat fs/stat.c:362 [inline]
__se_sys_newlstat+0x46/0x250 fs/stat.c:356
__x64_sys_newlstat+0x2d/0x40 fs/stat.c:356
do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
read to 0xffff888022cf7190 of 1 bytes by interrupt on cpu 1:
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:1596
__put_task_struct+0xc2/0x3a0 kernel/fork.c:735
put_task_struct include/linux/sched/task.h:113 [inline]
delayed_put_task_struct+0x49/0x130 kernel/exit.c:172
rcu_do_batch kernel/rcu/tree.c:2476 [inline]
rcu_core+0x6bb/0xbc0 kernel/rcu/tree.c:2711
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2724
__do_softirq+0x12c/0x2b1 kernel/softirq.c:298
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:393 [inline]
__irq_exit_rcu+0xb2/0xc0 kernel/softirq.c:423
sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1091
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:631
get_current arch/x86/include/asm/current.h:15 [inline]
need_resched include/linux/sched.h:1875 [inline]
copy_pte_range+0x2fa/0x1ab0 mm/memory.c:960
copy_pmd_range mm/memory.c:1058 [inline]
copy_pud_range mm/memory.c:1095 [inline]
copy_p4d_range mm/memory.c:1119 [inline]
copy_page_range+0x8ae/0xab0 mm/memory.c:1183
dup_mmap+0x74d/0x9e0 kernel/fork.c:593
dup_mm+0x7c/0x210 kernel/fork.c:1357
copy_mm kernel/fork.c:1413 [inline]
copy_process+0x1223/0x2d70 kernel/fork.c:2095
kernel_clone+0x14b/0x680 kernel/fork.c:2456
__do_sys_clone kernel/fork.c:2573 [inline]
__se_sys_clone kernel/fork.c:2557 [inline]
__x64_sys_clone+0xc8/0xf0 kernel/fork.c:2557
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: 1 PID: 22227 Comm: syz-executor.1 Not tainted 5.10.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================
---
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