KASAN: use-after-free Write in __unwind

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KASAN: use-after-free Write in __unwind_start (2) hardening	24	C			1	2734d	2734d	0/29	closed as invalid on 2018/03/02 10:58
upstream	KASAN: use-after-free Write in __unwind_start hardening	24				1	2818d	2813d	0/29	closed as invalid on 2018/02/01 12:06

================================================================== BUG: KASAN: use-after-free in memset include/linux/string.h:330 [inline] BUG: KASAN: use-after-free in __unwind_start+0x2d/0x330 arch/x86/kernel/unwind_frame.c:389 kasan: CONFIG_KASAN_INLINE enabled Write of size 88 at addr ffff8801cef1f3a0 by task syz-executor1/17024 kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 17027 Comm: syz-executor0 Not tainted 4.16.0-rc6+ #280 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:list_empty include/linux/list.h:203 [inline] RIP: 0010:__bfs+0x144/0x830 kernel/locking/lockdep.c:1010 RSP: 0018:ffff88019faf71e0 EFLAGS: 00010082 RAX: e000fc0000000000 RBX: ffffffff88223b70 RCX: 0000000000000000 RDX: 1ffff10033f5ee4d RSI: 0000000000000000 RDI: ffff88019faf73e0 RBP: ffff88019faf7350 R08: 0000000000000000 R09: 0000000000000000 R10: ffff88019faf7478 R11: ffffed0033f5ee7e R12: 1ffff10033f5ee4d R13: 0000000000000000 R14: ffff88019faf73d0 R15: ffff88019faf7328 FS: 0000000000d57940(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000480000 CR3: 00000001a8e93005 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __bfs_backwards kernel/locking/lockdep.c:1071 [inline] find_usage_backwards kernel/locking/lockdep.c:1385 [inline] check_usage_backwards+0x1fa/0x410 kernel/locking/lockdep.c:2666 mark_lock_irq kernel/locking/lockdep.c:2757 [inline] mark_lock+0xa2f/0x1430 kernel/locking/lockdep.c:3147 mark_irqflags kernel/locking/lockdep.c:3039 [inline] __lock_acquire+0x601/0x3e00 kernel/locking/lockdep.c:3388 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] inode_doinit_with_dentry+0x13e/0x14c0 security/selinux/hooks.c:1496 __inode_security_revalidate+0xd2/0x130 security/selinux/hooks.c:276 inode_security_rcu security/selinux/hooks.c:290 [inline] selinux_inode_permission+0x211/0x5f0 security/selinux/hooks.c:3093 security_inode_permission+0xaf/0xf0 security/security.c:697 inode_permission+0xea/0x470 fs/namei.c:456 SYSC_chdir fs/open.c:444 [inline] SyS_chdir+0xf1/0x200 fs/open.c:434 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453ea7 RSP: 002b:0000000000a3eb78 EFLAGS: 00000217 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 00000000000009bf RCX: 0000000000453ea7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000a3f850 RBP: 0000000000a3f220 R08: 0000000000000000 R09: 0000000000d57940 R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000 R13: 0000000000000013 R14: 0000000000000000 R15: 0000000000001380 Code: 8b 2b 4c 89 e2 48 c1 ea 03 80 3c 02 00 0f 85 b9 05 00 00 49 c1 ec 03 48 b8 00 00 00 00 00 fc 00 e0 4c 39 eb 4d 89 af 40 ff ff ff <41> c6 04 04 f8 0f 84 1d 04 00 00 49 89 c4 83 05 37 e3 73 06 01 RIP: __read_once_size include/linux/compiler.h:188 [inline] RSP: ffff88019faf71e0 RIP: list_empty include/linux/list.h:203 [inline] RSP: ffff88019faf71e0 RIP: __bfs+0x144/0x830 kernel/locking/lockdep.c:1010 RSP: ffff88019faf71e0 ---[ end trace d58dffdf846f396c ]---