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BUG: stack guard page was hit in sys_lchown

Status: closed as invalid on 2022/02/28 16:09
Reported-by: syzbot+0e8eb11b3f62074b4b6f@syzkaller.appspotmail.com
Fix commit: 6f915dd2af92 ANDROID: incremental-fs: remove index and incomplete dir on umount
First crash: 1068d, last: 1019d
Cause bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (4)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 BUG: stack guard page was hit in sys_lchown (3) C error 2 970d 970d 0/2 closed as dup on 2022/03/30 17:24
android-5-10 BUG: stack guard page was hit in sys_lchown (5) C error 5 937d 939d 0/2 closed as dup on 2022/05/04 16:07
android-5-10 BUG: stack guard page was hit in sys_lchown (2) C done 3 976d 976d 0/2 closed as dup on 2022/03/21 14:57
android-5-10 BUG: stack guard page was hit in sys_lchown (4) C error 2 964d 964d 0/2 closed as dup on 2022/04/04 16:48
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2022/01/26 17:50 11m tadeusz.struk@linaro.org https://android.googlesource.com/kernel/common fd4c6594f5ce OK

Sample crash report:
BUG: stack guard page was hit at ffffc90000b2fff8 (stack is ffffc90000b30000..ffffc90000b37fff)
kernel stack overflow (double-fault): 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 365 Comm: syz-executor001 Not tainted 5.10.85-syzkaller-00573-gafc997898ece #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:unwind_start arch/x86/include/asm/unwind.h:60 [inline]
RIP: 0010:unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch/x86/kernel/stacktrace.c:24
RIP: 0010:arch_stack_walk+0xd7/0x140 arch/x86/kernel/stacktrace.c:24 arch/x86/kernel/stacktrace.c:24
Code: eb 1b 65 48 8b 04 25 80 6d 02 00 4c 39 e0 74 0a 49 8b 8c 24 98 0e 00 00 eb 03 48 89 e9 48 8d bd 70 ff ff ff 4c 89 e6 4c 89 fa <e8> 84 1a 06 00 83 bd 70 ff ff ff 00 74 36 48 8d 9d 70 ff ff ff 0f
RSP: 0018:ffffc90000b30000 EFLAGS: 00010246
RAX: ffff8881073a2780 RBX: 1ffff9200016601e RCX: ffffc90000b30090
RDX: 0000000000000000 RSI: ffff8881073a2780 RDI: ffffc90000b30000
RBP: ffffc90000b30090 R08: dffffc0000000000 R09: ffffc90000b300e0
R10: fffff5200016601f R11: 0000000000000000 R12: ffff8881073a2780
R13: ffffffff815bebe0 R14: ffffc90000b300e0 R15: 0000000000000000
FS:  0000555556d1b3c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000b2fff8 CR3: 00000001073e0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 stack_trace_save+0x11b/0x1e0 kernel/stacktrace.c:121 kernel/stacktrace.c:121
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:428 [inline]
 kasan_save_stack mm/kasan/common.c:38 [inline] mm/kasan/common.c:461
 kasan_set_track mm/kasan/common.c:46 [inline] mm/kasan/common.c:461
 set_alloc_info mm/kasan/common.c:428 [inline] mm/kasan/common.c:461
 __kasan_slab_alloc+0xb2/0xe0 mm/kasan/common.c:461 mm/kasan/common.c:461
 kasan_slab_alloc include/linux/kasan.h:259 [inline]
 slab_post_alloc_hook mm/slab.h:583 [inline]
 slab_alloc_node mm/slub.c:2948 [inline]
 slab_alloc mm/slub.c:2956 [inline]
 kasan_slab_alloc include/linux/kasan.h:259 [inline] mm/slub.c:2961
 slab_post_alloc_hook mm/slab.h:583 [inline] mm/slub.c:2961
 slab_alloc_node mm/slub.c:2948 [inline] mm/slub.c:2961
 slab_alloc mm/slub.c:2956 [inline] mm/slub.c:2961
 kmem_cache_alloc+0x1a2/0x380 mm/slub.c:2961 mm/slub.c:2961
 __d_alloc+0x2d/0x6b0 fs/dcache.c:1709 fs/dcache.c:1709
 d_alloc fs/dcache.c:1788 [inline]
 d_alloc fs/dcache.c:1788 [inline] fs/dcache.c:2540
 d_alloc_parallel+0xf3/0x1360 fs/dcache.c:2540 fs/dcache.c:2540
 __lookup_slow+0x14e/0x400 fs/namei.c:1613 fs/namei.c:1613
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_one_len+0x17f/0x2c0 fs/namei.c:2642 fs/namei.c:2642
 incfs_lookup_dentry+0x5f/0xb0 fs/incfs/data_mgmt.c:211 fs/incfs/data_mgmt.c:211
 dir_lookup+0x3b8/0x6e0 fs/incfs/vfs.c:967 fs/incfs/vfs.c:967
 __lookup_slow+0x2b3/0x400 fs/namei.c:1628 fs/namei.c:1628
 lookup_slow fs/namei.c:1645 [inline]
 lookup_slow fs/namei.c:1645 [inline] fs/namei.c:1940
 walk_component+0x516/0x790 fs/namei.c:1940 fs/namei.c:1940
 lookup_last fs/namei.c:2389 [inline]
 lookup_last fs/namei.c:2389 [inline] fs/namei.c:2413
 path_lookupat+0x19d/0x6c0 fs/namei.c:2413 fs/namei.c:2413
 filename_lookup+0x23f/0x6c0 fs/namei.c:2446 fs/namei.c:2446
 user_path_at_empty+0x40/0x50 fs/namei.c:2726 fs/namei.c:2726
 user_path_at include/linux/namei.h:59 [inline]
 user_path_at include/linux/namei.h:59 [inline] fs/open.c:699
 do_fchownat+0xed/0x240 fs/open.c:699 fs/open.c:699
 __do_sys_lchown fs/open.c:730 [inline]
 __se_sys_lchown fs/open.c:728 [inline]
 __do_sys_lchown fs/open.c:730 [inline] fs/open.c:728
 __se_sys_lchown fs/open.c:728 [inline] fs/open.c:728
 __x64_sys_lchown+0x85/0x90 fs/open.c:728 fs/open.c:728
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f4cdf0e9df9
Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c4 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd7ba36878 EFLAGS: 00000246 ORIG_RAX: 000000000000005e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4cdf0e9df9
RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 00000000200002c0
RBP: 00007ffd7ba36880 R08: 00007f4cdf0a8360 R09: 00007f4cdf0a8360
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace d4f6ceec398be156 ]---
RIP: 0010:unwind_start arch/x86/include/asm/unwind.h:60 [inline]
RIP: 0010:unwind_start arch/x86/include/asm/unwind.h:60 [inline] arch/x86/kernel/stacktrace.c:24
RIP: 0010:arch_stack_walk+0xd7/0x140 arch/x86/kernel/stacktrace.c:24 arch/x86/kernel/stacktrace.c:24
Code: eb 1b 65 48 8b 04 25 80 6d 02 00 4c 39 e0 74 0a 49 8b 8c 24 98 0e 00 00 eb 03 48 89 e9 48 8d bd 70 ff ff ff 4c 89 e6 4c 89 fa <e8> 84 1a 06 00 83 bd 70 ff ff ff 00 74 36 48 8d 9d 70 ff ff ff 0f
RSP: 0018:ffffc90000b30000 EFLAGS: 00010246
RAX: ffff8881073a2780 RBX: 1ffff9200016601e RCX: ffffc90000b30090
RDX: 0000000000000000 RSI: ffff8881073a2780 RDI: ffffc90000b30000
RBP: ffffc90000b30090 R08: dffffc0000000000 R09: ffffc90000b300e0
R10: fffff5200016601f R11: 0000000000000000 R12: ffff8881073a2780
R13: ffffffff815bebe0 R14: ffffc90000b300e0 R15: 0000000000000000
FS:  0000555556d1b3c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc90000b2fff8 CR3: 00000001073e0000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	eb 1b                	jmp    0x1d
   2:	65 48 8b 04 25 80 6d 	mov    %gs:0x26d80,%rax
   9:	02 00
   b:	4c 39 e0             	cmp    %r12,%rax
   e:	74 0a                	je     0x1a
  10:	49 8b 8c 24 98 0e 00 	mov    0xe98(%r12),%rcx
  17:	00
  18:	eb 03                	jmp    0x1d
  1a:	48 89 e9             	mov    %rbp,%rcx
  1d:	48 8d bd 70 ff ff ff 	lea    -0x90(%rbp),%rdi
  24:	4c 89 e6             	mov    %r12,%rsi
  27:	4c 89 fa             	mov    %r15,%rdx
* 2a:	e8 84 1a 06 00       	callq  0x61ab3 <-- trapping instruction
  2f:	83 bd 70 ff ff ff 00 	cmpl   $0x0,-0x90(%rbp)
  36:	74 36                	je     0x6e
  38:	48 8d 9d 70 ff ff ff 	lea    -0x90(%rbp),%rbx
  3f:	0f                   	.byte 0xf
----------------
Code disassembly (best guess):
   0:	eb 1b                	jmp    0x1d
   2:	65 48 8b 04 25 80 6d 	mov    %gs:0x26d80,%rax
   9:	02 00
   b:	4c 39 e0             	cmp    %r12,%rax
   e:	74 0a                	je     0x1a
  10:	49 8b 8c 24 98 0e 00 	mov    0xe98(%r12),%rcx
  17:	00
  18:	eb 03                	jmp    0x1d
  1a:	48 89 e9             	mov    %rbp,%rcx
  1d:	48 8d bd 70 ff ff ff 	lea    -0x90(%rbp),%rdi
  24:	4c 89 e6             	mov    %r12,%rsi
  27:	4c 89 fa             	mov    %r15,%rdx
* 2a:	e8 84 1a 06 00       	callq  0x61ab3 <-- trapping instruction
  2f:	83 bd 70 ff ff ff 00 	cmpl   $0x0,-0x90(%rbp)
  36:	74 36                	je     0x6e
  38:	48 8d 9d 70 ff ff ff 	lea    -0x90(%rbp),%rbx
  3f:	0f                   	.byte 0xf

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/12/18 20:48 android12-5.10-lts afc997898ece 44068e19 .config console log report syz C ci2-android-5-10 BUG: stack guard page was hit in sys_lchown
2022/02/05 17:06 android12-5.10-lts 34fd8cb7e75c a7dab638 .config console log report info ci2-android-5-10 BUG: stack guard page was hit in sys_lchown
2022/01/15 08:04 android12-5.10-lts d605f2f30d54 723cfaf0 .config console log report info ci2-android-5-10 BUG: stack guard page was hit in sys_lchown
2021/12/18 20:30 android12-5.10-lts afc997898ece 44068e19 .config console log report info ci2-android-5-10 BUG: stack guard page was hit in sys_lchown
* Struck through repros no longer work on HEAD.