linux-kernel - [syzbot] [ext4?] kernel BUG in deactivate

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Message-ID: <6769c4a8.050a0220.226966.0042.GAE@google.com>
Date: Mon, 23 Dec 2024 12:14:32 -0800
From: syzbot <syzbot+ccda44e9a0f765fd9706@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: [syzbot] [ext4?] kernel BUG in deactivate_slab (2)

Hello,

syzbot found the following issue on:

HEAD commit:    2e7aff49b5da Merge branches 'for-next/core' and 'for-next/..
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=1129f7e8580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=696fb014d05da3a3
dashboard link: https://syzkaller.appspot.com/bug?extid=ccda44e9a0f765fd9706
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ef408f67fde3/disk-2e7aff49.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/414ac17a20dc/vmlinux-2e7aff49.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a93415d2a7e7/Image-2e7aff49.gz.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ccda44e9a0f765fd9706@...kaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at mm/slub.c:3071!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 10301 Comm: syz.8.517 Not tainted 6.13.0-rc2-syzkaller-g2e7aff49b5da #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : deactivate_slab+0x2cc/0x36c mm/slub.c:3103
lr : ___slab_alloc+0x3c8/0xf4c mm/slub.c:3740
sp : ffff80009d7f7370
x29: ffff80009d7f7370 x28: 0000000000000000 x27: ffff8000810d3d04
x26: 0000000000000000 x25: 0080170003ffff00 x24: 0000000000000001
x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000d71c1640
x20: ffff0000c898cd80 x19: fffffdffc36df305 x18: ffff0000d8a02240
x17: ffff800123d64000 x16: ffff800080460e20 x15: 0000000000000001
x14: 1ffff00011f300ca x13: ffff80009d7f8000 x12: 0000000000000003
x11: 0000000000080000 x10: 0000000000000003 x9 : 0000000000000000
x8 : ffff0000d71c1640 x7 : ffff800080b4ee7c x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 01f5000000000000
x2 : 0080170003ffff00 x1 : fffffdffc36df305 x0 : ffff0000d71c1640
Call trace:
 add_partial mm/slub.c:3103 [inline] (P)
 deactivate_slab+0x2cc/0x36c mm/slub.c:3097 (P)
 ___slab_alloc+0x3c8/0xf4c mm/slub.c:3740 (L)
 ___slab_alloc+0x3c8/0xf4c mm/slub.c:3740
 __slab_alloc+0x74/0xd0 mm/slub.c:3905
 __slab_alloc_node mm/slub.c:3980 [inline]
 slab_alloc_node mm/slub.c:4141 [inline]
 kmem_cache_alloc_noprof+0x300/0x410 mm/slub.c:4160
 ext4_mb_add_groupinfo+0x5d8/0xdf4 fs/ext4/mballoc.c:3356
 ext4_mb_init_backend fs/ext4/mballoc.c:3435 [inline]
 ext4_mb_init+0x107c/0x2014 fs/ext4/mballoc.c:3733
 __ext4_fill_super fs/ext4/super.c:5559 [inline]
 ext4_fill_super+0x4b50/0x57d0 fs/ext4/super.c:5733
 get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636
 get_tree_bdev+0x2c/0x3c fs/super.c:1659
 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5765
 vfs_get_tree+0x90/0x28c fs/super.c:1814
 do_new_mount+0x278/0x900 fs/namespace.c:3507
 path_mount+0x590/0xe04 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount fs/namespace.c:4034 [inline]
 __arm64_sys_mount+0x4d4/0x5ac fs/namespace.c:4034
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: d50323bf d65f03c0 d4210000 17ffffc0 (d4210000) 
---[ end trace 0000000000000000 ]---


---
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