general protection fault in debug_check_no_obj_freed (5)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 8096acd7442e Merge tag 'net-5.14-rc2' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=125e0578300000
kernel config: https://syzkaller.appspot.com/x/.config?x=da140227e4f25b17
dashboard link: https://syzkaller.appspot.com/bug?extid=8c1457a5605da6756e36
CC: [linux-...@vger.kernel.org linux-...@vger.kernel.org vi...@zeniv.linux.org.uk]

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+8c1457...@syzkaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc000f7ff2a1: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x000000007bff9508-0x000000007bff950f]
CPU: 0 PID: 19098 Comm: syz-executor.1 Tainted: G W 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:976 [inline]
RIP: 0010:debug_check_no_obj_freed+0x1d3/0x420 lib/debugobjects.c:1018
Code: 39 00 0f 85 0f 02 00 00 48 89 45 08 4d 89 30 4c 89 c7 4d 89 68 08 e8 7c d0 ff ff 48 85 ed 74 2c 49 89 e8 4c 89 c0 48 c1 e8 03 <42> 80 3c 38 00 0f 84 2e ff ff ff 4c 89 c7 4c 89 44 24 38 e8 45 93
RSP: 0018:ffffc9000aa7fcf0 EFLAGS: 00010002
RAX: 000000000f7ff2a1 RBX: ffff888021c79100 RCX: ffffffff815b76b0
RDX: 1ffffffff2093e31 RSI: 0000000000000004 RDI: ffff888000115fa0
RBP: 000000007bff9508 R08: 000000007bff9508 R09: 0000000000000000
R10: fffff5200154ff8c R11: 000000000000003f R12: 000000000000001d
R13: dead000000000122 R14: dead000000000100 R15: dffffc0000000000
FS: 0000000002450400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000014a53ad CR3: 0000000179240000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
slab_free_hook mm/slub.c:1625 [inline]
slab_free_freelist_hook+0x171/0x240 mm/slub.c:1675
slab_free mm/slub.c:3235 [inline]
kmem_cache_free+0x8e/0x5a0 mm/slub.c:3251
putname+0xe1/0x120 fs/namei.c:259
do_symlinkat+0x1b2/0x300 fs/namei.c:4221
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x465ee7
Code: 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 58 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:0000000000a9fd68 EFLAGS: 00000202 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000465ee7
RDX: 0000000000a9fe53 RSI: 00000000004bfd70 RDI: 0000000000a9fe40
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000a9fc00
R10: 0000000000a9fab7 R11: 0000000000000202 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000a9fe40
Modules linked in:
---[ end trace b6f274e250bf0b2f ]---
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:976 [inline]
RIP: 0010:debug_check_no_obj_freed+0x1d3/0x420 lib/debugobjects.c:1018
Code: 39 00 0f 85 0f 02 00 00 48 89 45 08 4d 89 30 4c 89 c7 4d 89 68 08 e8 7c d0 ff ff 48 85 ed 74 2c 49 89 e8 4c 89 c0 48 c1 e8 03 <42> 80 3c 38 00 0f 84 2e ff ff ff 4c 89 c7 4c 89 44 24 38 e8 45 93
RSP: 0018:ffffc9000aa7fcf0 EFLAGS: 00010002
RAX: 000000000f7ff2a1 RBX: ffff888021c79100 RCX: ffffffff815b76b0
RDX: 1ffffffff2093e31 RSI: 0000000000000004 RDI: ffff888000115fa0
RBP: 000000007bff9508 R08: 000000007bff9508 R09: 0000000000000000
R10: fffff5200154ff8c R11: 000000000000003f R12: 000000000000001d
R13: dead000000000122 R14: dead000000000100 R15: dffffc0000000000
FS: 0000000002450400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000014a53ad CR3: 0000000179240000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.