[syzbot] [mm?] WARNING in setup_conf

[syzbot] [mm?] WARNING in setup_conf

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    9d2ed026f031 Merge tag 'sysctl-7.03-rc1' of git://git.kern..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1124919e580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6e414d6e0a79e71d
dashboard link: https://syzkaller.appspot.com/bug?extid=75f49ec552cc74d9d69b
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

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

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-9d2ed026.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/89c0c0c0f535/vmlinux-9d2ed026.xz
kernel image: https://storage.googleapis.com/syzbot-assets/80d7adeb0e7d/bzImage-9d2ed026.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+75f49ec552cc74d9d69b@syzkaller.appspotmail.com

tipc: Started in network mode
tipc: Node identity 2007ff, cluster identity 4711
tipc: Node number set to 2099199
md: async del_gendisk mode will be removed in future, please upgrade to mdadm-4.5+
------------[ cut here ]------------
1
WARNING: mm/page_alloc.c:5280 at __alloc_frozen_pages_noprof+0x2ce/0x380 mm/page_alloc.c:5280, CPU#0: syz.0.0/5310
Modules linked in:
CPU: 0 UID: 0 PID: 5310 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:__alloc_frozen_pages_noprof+0x2ce/0x380 mm/page_alloc.c:5280
Code: 74 10 4c 89 e7 89 54 24 0c e8 8e 2d 0e 00 8b 54 24 0c 49 83 3c 24 00 0f 85 ab fe ff ff e9 ac fe ff ff c6 05 74 6e 18 0e 01 90 <0f> 0b 90 e9 17 ff ff ff a9 00 00 08 00 48 8b 4c 24 10 4c 8d 44 24
RSP: 0018:ffffc9000d50f520 EFLAGS: 00010246
RAX: ffffc9000d50f500 RBX: 0000000000000015 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000d50f588
RBP: ffffc9000d50f610 R08: ffffc9000d50f587 R09: 0000000000000000
R10: ffffc9000d50f560 R11: fffff52001aa1eb1 R12: 0000000000000000
R13: 1ffff92001aa1ea8 R14: 0000000000040dc0 R15: dffffc0000000000
FS:  00007fe2b9aac6c0(0000) GS:ffff88808c519000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc93d2c090 CR3: 0000000044100000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 alloc_pages_mpol+0x212/0x390 mm/mempolicy.c:2490
 ___kmalloc_large_node+0x4c/0x120 mm/slub.c:5274
 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5305
 __do_kmalloc_node mm/slub.c:5322 [inline]
 __kmalloc_noprof+0x409/0x720 mm/slub.c:5359
 _kmalloc_noprof include/linux/slab.h:992 [inline]
 _kzalloc_noprof include/linux/slab.h:1309 [inline]
 setup_conf+0x28b/0xce0 drivers/md/raid10.c:3883
 raid10_run+0x1d2/0x16c0 drivers/md/raid10.c:3984
 md_run+0xdbd/0x1e00 drivers/md/md.c:6760
 do_md_run+0x35/0x720 drivers/md/md.c:6861
 md_ioctl+0x1c58/0x2580 drivers/md/md.c:8492
 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:797
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe2b8b9e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe2b9aabfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe2b8e25fa0 RCX: 00007fe2b8b9e0d9
RDX: 0000000000000000 RSI: 00000000400c0930 RDI: 0000000000000009
RBP: 00007fe2b8c35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe2b8e26038 R14: 00007fe2b8e25fa0 R15: 00007ffe1ca65d58
 </TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

Re: [syzbot] [mm?] WARNING in setup_conf

[Andrew Morton]

On Mon, 24 Aug 2026 17:03:34 -0700 syzbot <syzbot+75f49ec552cc74d9d69b@syzkaller.appspotmail.com> wrote:

> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    9d2ed026f031 Merge tag 'sysctl-7.03-rc1' of git://git.kern..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1124919e580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=6e414d6e0a79e71d
> dashboard link: https://syzkaller.appspot.com/bug?extid=75f49ec552cc74d9d69b
> compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
> 
> Unfortunately, I don't have any reproducer for this issue yet.
> 
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-9d2ed026.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/89c0c0c0f535/vmlinux-9d2ed026.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/80d7adeb0e7d/bzImage-9d2ed026.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+75f49ec552cc74d9d69b@syzkaller.appspotmail.com

Thanks.  drivers/md/raid10.c lacks some sanity checking.

In setup_conf():

	/* FIXME calc properly */
	conf->mirrors = kzalloc_objs(struct raid10_info,
				     mddev->raid_disks + max(0, -mddev->delta_disks));

passed a crazy large number into kzalloc_objs(), causing
__alloc_frozen_pages_noprof() to hit

	if (WARN_ON_ONCE_GFP(order > MAX_PAGE_ORDER, gfp))
		return NULL;


> tipc: Started in network mode
> tipc: Node identity 2007ff, cluster identity 4711
> tipc: Node number set to 2099199
> md: async del_gendisk mode will be removed in future, please upgrade to mdadm-4.5+
> ------------[ cut here ]------------
> 1
> WARNING: mm/page_alloc.c:5280 at __alloc_frozen_pages_noprof+0x2ce/0x380 mm/page_alloc.c:5280, CPU#0: syz.0.0/5310
> Modules linked in:
> CPU: 0 UID: 0 PID: 5310 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
> RIP: 0010:__alloc_frozen_pages_noprof+0x2ce/0x380 mm/page_alloc.c:5280
> Code: 74 10 4c 89 e7 89 54 24 0c e8 8e 2d 0e 00 8b 54 24 0c 49 83 3c 24 00 0f 85 ab fe ff ff e9 ac fe ff ff c6 05 74 6e 18 0e 01 90 <0f> 0b 90 e9 17 ff ff ff a9 00 00 08 00 48 8b 4c 24 10 4c 8d 44 24
> RSP: 0018:ffffc9000d50f520 EFLAGS: 00010246
> RAX: ffffc9000d50f500 RBX: 0000000000000015 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc9000d50f588
> RBP: ffffc9000d50f610 R08: ffffc9000d50f587 R09: 0000000000000000
> R10: ffffc9000d50f560 R11: fffff52001aa1eb1 R12: 0000000000000000
> R13: 1ffff92001aa1ea8 R14: 0000000000040dc0 R15: dffffc0000000000
> FS:  00007fe2b9aac6c0(0000) GS:ffff88808c519000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007ffc93d2c090 CR3: 0000000044100000 CR4: 0000000000352ef0
> Call Trace:
>  <TASK>
>  alloc_pages_mpol+0x212/0x390 mm/mempolicy.c:2490
>  ___kmalloc_large_node+0x4c/0x120 mm/slub.c:5274
>  __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5305
>  __do_kmalloc_node mm/slub.c:5322 [inline]
>  __kmalloc_noprof+0x409/0x720 mm/slub.c:5359
>  _kmalloc_noprof include/linux/slab.h:992 [inline]
>  _kzalloc_noprof include/linux/slab.h:1309 [inline]
>  setup_conf+0x28b/0xce0 drivers/md/raid10.c:3883
>  raid10_run+0x1d2/0x16c0 drivers/md/raid10.c:3984
>  md_run+0xdbd/0x1e00 drivers/md/md.c:6760
>  do_md_run+0x35/0x720 drivers/md/md.c:6861
>  md_ioctl+0x1c58/0x2580 drivers/md/md.c:8492
>  blkdev_ioctl+0x5e3/0x740 block/ioctl.c:797
>  vfs_ioctl fs/ioctl.c:51 [inline]
>  __do_sys_ioctl fs/ioctl.c:597 [inline]
>  __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
>  do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
>  do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7fe2b8b9e0d9
> Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007fe2b9aabfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 00007fe2b8e25fa0 RCX: 00007fe2b8b9e0d9
> RDX: 0000000000000000 RSI: 00000000400c0930 RDI: 0000000000000009
> RBP: 00007fe2b8c35024 R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007fe2b8e26038 R14: 00007fe2b8e25fa0 R15: 00007ffe1ca65d58
>  </TASK>
> 
> 
> ---
> This report is generated by a bot. It may contain errors.
> See https://goo.gl/tpsmEJ for more information about syzbot.
> syzbot engineers can be reached at syzkaller@googlegroups.com.
> 
> syzbot will keep track of this issue. See:
> https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> 
> If the report is already addressed, let syzbot know by replying with:
> #syz fix: exact-commit-title
> 
> If you want to overwrite report's subsystems, reply with:
> #syz set subsystems: new-subsystem
> (See the list of subsystem names on the web dashboard)
> 
> If the report is a duplicate of another one, reply with:
> #syz dup: exact-subject-of-another-report
> 
> If you want to undo deduplication, reply with:
> #syz undup

Re: [syzbot] [mm?] WARNING in setup_conf

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit:    f0100363d8c3 Merge tag 'xfs-fixes-7.3-rc5' of gitolite.ker..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=17971805580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2b924f079099ba6e
dashboard link: https://syzkaller.appspot.com/bug?extid=75f49ec552cc74d9d69b
compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17b20c5e580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10720c5e580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-f0100363.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/18fb2734cddb/vmlinux-f0100363.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5737b586e7bc/bzImage-f0100363.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+75f49ec552cc74d9d69b@syzkaller.appspotmail.com

md: async del_gendisk mode will be removed in future, please upgrade to mdadm-4.5+
syz.0.17 uses obsolete (PF_INET,SOCK_PACKET)
------------[ cut here ]------------
1
WARNING: mm/page_alloc.c:5340 at alloc_order_allowed mm/page_alloc.c:5340 [inline], CPU#0: syz.0.17/5462
WARNING: mm/page_alloc.c:5340 at __alloc_frozen_pages_noprof+0x425/0x5a0 mm/page_alloc.c:5397, CPU#0: syz.0.17/5462
Modules linked in:
CPU: 0 UID: 0 PID: 5462 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:alloc_order_allowed mm/page_alloc.c:5340 [inline]
RIP: 0010:__alloc_frozen_pages_noprof+0x425/0x5a0 mm/page_alloc.c:5397
Code: 90 e9 76 fe ff ff 41 81 e6 3f ff ff ff 44 89 f1 41 83 e6 f7 a9 00 00 00 10 44 0f 44 f1 e9 45 fd ff ff c6 05 2c 98 38 0e 01 90 <0f> 0b 90 e9 8b fe ff ff 48 8d 3d ac 09 54 0e 67 48 0f b9 3a e9 68
RSP: 0018:ffffc90003b87520 EFLAGS: 00010246
RAX: ffffc90003b87500 RBX: 1ffff92000770ea8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 000000000000000e RDI: ffffc90003b87588
RBP: ffffc90003b87618 R08: ffffc90003b87587 R09: 0000000000000000
R10: ffffc90003b87560 R11: fffff52000770eb1 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000040dc0 R15: 0000000000000000
FS:  00005555836a7500(0000) GS:ffff88808c2c0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4a2c07ae9c CR3: 000000003bff7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 alloc_pages_mpol+0x21e/0x390 mm/mempolicy.c:2486
 ___kmalloc_large_node+0x4f/0x120 mm/slub.c:5353
 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5385
 __do_kmalloc_node mm/slub.c:5402 [inline]
 __kmalloc_noprof+0x3fb/0x720 mm/slub.c:5439
 _kmalloc_noprof include/linux/slab.h:995 [inline]
 _kzalloc_noprof include/linux/slab.h:1312 [inline]
 setup_conf+0x28b/0xd30 drivers/md/raid10.c:3855
 raid10_run+0x1d2/0x16c0 drivers/md/raid10.c:3955
 md_run+0xc3d/0x1cd0 drivers/md/md.c:6779
 do_md_run+0x35/0x720 drivers/md/md.c:6880
 md_ioctl+0x1e2b/0x2610 drivers/md/md.c:8515
 blkdev_ioctl+0x5e3/0x740 block/ioctl.c:798
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efcb939e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd8c37e488 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efcb9625fa0 RCX: 00007efcb939e159
RDX: 0000000000000000 RSI: 00000000400c0930 RDI: 0000000000000004
RBP: 00007efcb943506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efcb9625fac R14: 00007efcb9625fa0 R15: 00007efcb9625fa0
 </TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

Re: [syzbot] [mm?] WARNING in setup_conf

[Andrew Morton]

tl;dr: a raid issue.

more below:

On Tue, 22 Sep 2026 07:08:43 -0700 syzbot <syzbot+75f49ec552cc74d9d69b@syzkaller.appspotmail.com> wrote:

> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    f0100363d8c3 Merge tag 'xfs-fixes-7.3-rc5' of gitolite.ker..
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=17971805580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=2b924f079099ba6e
> dashboard link: https://syzkaller.appspot.com/bug?extid=75f49ec552cc74d9d69b
> compiler:       Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17b20c5e580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=10720c5e580000
> 
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-f0100363.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/18fb2734cddb/vmlinux-f0100363.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/5737b586e7bc/bzImage-f0100363.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+75f49ec552cc74d9d69b@syzkaller.appspotmail.com
> 
> md: async del_gendisk mode will be removed in future, please upgrade to mdadm-4.5+
> syz.0.17 uses obsolete (PF_INET,SOCK_PACKET)
> ------------[ cut here ]------------
> 1
> WARNING: mm/page_alloc.c:5340 at alloc_order_allowed mm/page_alloc.c:5340 [inline], CPU#0: syz.0.17/5462
> WARNING: mm/page_alloc.c:5340 at __alloc_frozen_pages_noprof+0x425/0x5a0 mm/page_alloc.c:5397, CPU#0: syz.0.17/5462
> Modules linked in:
> CPU: 0 UID: 0 PID: 5462 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
> RIP: 0010:alloc_order_allowed mm/page_alloc.c:5340 [inline]
> RIP: 0010:__alloc_frozen_pages_noprof+0x425/0x5a0 mm/page_alloc.c:5397

Here, core MM is warning that it was asked to allocate a crazy amount
of memory.  By drivers/md/raid10.c:setup_conf().

It's root-only so "don't do that" is a respectable response.  But
adding some sanity check into setup_conf() would make the fuzzer emails
go away so we can concentrate on real stuff.


> Code: 90 e9 76 fe ff ff 41 81 e6 3f ff ff ff 44 89 f1 41 83 e6 f7 a9 00 00 00 10 44 0f 44 f1 e9 45 fd ff ff c6 05 2c 98 38 0e 01 90 <0f> 0b 90 e9 8b fe ff ff 48 8d 3d ac 09 54 0e 67 48 0f b9 3a e9 68
> RSP: 0018:ffffc90003b87520 EFLAGS: 00010246
> RAX: ffffc90003b87500 RBX: 1ffff92000770ea8 RCX: 0000000000000000
> RDX: 0000000000000000 RSI: 000000000000000e RDI: ffffc90003b87588
> RBP: ffffc90003b87618 R08: ffffc90003b87587 R09: 0000000000000000
> R10: ffffc90003b87560 R11: fffff52000770eb1 R12: 0000000000000000
> R13: 0000000000000000 R14: 0000000000040dc0 R15: 0000000000000000
> FS:  00005555836a7500(0000) GS:ffff88808c2c0000(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: 00007f4a2c07ae9c CR3: 000000003bff7000 CR4: 0000000000352ef0
> Call Trace:
>  <TASK>
>  alloc_pages_mpol+0x21e/0x390 mm/mempolicy.c:2486
>  ___kmalloc_large_node+0x4f/0x120 mm/slub.c:5353
>  __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5385
>  __do_kmalloc_node mm/slub.c:5402 [inline]
>  __kmalloc_noprof+0x3fb/0x720 mm/slub.c:5439
>  _kmalloc_noprof include/linux/slab.h:995 [inline]
>  _kzalloc_noprof include/linux/slab.h:1312 [inline]
>  setup_conf+0x28b/0xd30 drivers/md/raid10.c:3855
>  raid10_run+0x1d2/0x16c0 drivers/md/raid10.c:3955
>  md_run+0xc3d/0x1cd0 drivers/md/md.c:6779
>  do_md_run+0x35/0x720 drivers/md/md.c:6880
>  md_ioctl+0x1e2b/0x2610 drivers/md/md.c:8515
>  blkdev_ioctl+0x5e3/0x740 block/ioctl.c:798
>  vfs_ioctl fs/ioctl.c:51 [inline]
>  __do_sys_ioctl fs/ioctl.c:597 [inline]
>  __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
>  do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
>  do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
>  entry_SYSCALL_64_after_hwframe+0x77/0x7f
> RIP: 0033:0x7efcb939e159
> Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 e8 ff ff ff f7 d8 64 89 01 48
> RSP: 002b:00007ffd8c37e488 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
> RAX: ffffffffffffffda RBX: 00007efcb9625fa0 RCX: 00007efcb939e159
> RDX: 0000000000000000 RSI: 00000000400c0930 RDI: 0000000000000004
> RBP: 00007efcb943506b R08: 0000000000000000 R09: 0000000000000000
> R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
> R13: 00007efcb9625fac R14: 00007efcb9625fa0 R15: 00007efcb9625fa0
>  </TASK>
> 
> 
> ---
> If you want syzbot to run the reproducer, reply with:
> #syz test: git://repo/address.git branch-or-commit-hash
> If you attach or paste a git patch, syzbot will apply it before testing.

Forwarded: test bug for patch

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Subject: test bug for patch
Author: gowtham398gs@gmail.com

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index f0646fb24371..88038d535727 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -3050,6 +3050,16 @@ static struct r1conf *setup_conf(struct mddev *mddev)
  struct md_rdev *rdev;
  size_t r1bio_size;
  int err = -ENOMEM;
+ size_t calculated_size;
+
+ /* prevent baseline integer wrap-around anomalies first*/
+ /* Safely calculate size; overflows automatically saturate to SIZE_MAX */
+
+ calculated_size = size_add(sizeof(struct r1conf),
+   size_mul(mddev->raid_disks, sizeof(struct r1bio)));
+
+ if (mddev->raid_disks <= 0 || calculated_size >= KMALLOC_MAX_SIZE)
+ return ERR_PTR(-EINVAL);

  conf = kzalloc_obj(struct r1conf);
  if (!conf)

Forwarded: test

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Subject: test
Author: gowtham398gs@gmail.com

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index f0646fb24371..d35efa876274 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -3050,6 +3050,11 @@ static struct r1conf *setup_conf(struct mddev *mddev)
  struct md_rdev *rdev;
  size_t r1bio_size;
  int err = -ENOMEM;
+
+        /* check if mddev->raid_disks is valid before passsing through
kzalloc */
+
+ if(mddev->raid_disks <= 0 || mddev->raid_disks > MAX_RAID_DISKS)
+ return ERR_PTR(-EINVAL);

  conf = kzalloc_obj(struct r1conf);
  if (!conf)

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Subject: test
Author: gowtham398gs@gmail.com

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
master

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index f0646fb24371..d35efa876274 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -3050,6 +3050,11 @@ static struct r1conf *setup_conf(struct mddev *mddev)
  struct md_rdev *rdev;
  size_t r1bio_size;
  int err = -ENOMEM;
+
+        /* check if mddev->raid_disks is valid before passsing through
kzalloc */
+
+ if(mddev->raid_disks <= 0 || mddev->raid_disks > MAX_RAID_DISKS)
+ return ERR_PTR(-EINVAL);

  conf = kzalloc_obj(struct r1conf);
  if (!conf)

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Subject: test
Author: idosch@nvidia.com

#syz test

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c90ee6dd7446..e1e672ada7e7 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3908,9 +3908,12 @@ static int addrconf_ifdown(struct net_device *dev, bool unregister)
 	}
 
 	/* combine the user config with event to determine if permanent
-	 * addresses are to be removed from address hash table
+	 * addresses are to be removed from address hash table. IPv6 cannot
+	 * operate below IPV6_MIN_MTU, so treat that like disable_ipv6 and do
+	 * not keep addresses without their host routes.
 	 */
-	if (!unregister && !idev->cnf.disable_ipv6) {
+	if (!unregister && !idev->cnf.disable_ipv6 &&
+	    dev->mtu >= IPV6_MIN_MTU) {
 		/* aggregate the system setting and interface setting */
 		int _keep_addr = READ_ONCE(net->ipv6.devconf_all->keep_addr_on_down);
 

Forwarded: test

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Subject: test
Author: idosch@nvidia.com

#syz test

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c90ee6dd7446..e1e672ada7e7 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -3908,9 +3908,12 @@ static int addrconf_ifdown(struct net_device *dev, bool unregister)
 	}
 
 	/* combine the user config with event to determine if permanent
-	 * addresses are to be removed from address hash table
+	 * addresses are to be removed from address hash table. IPv6 cannot
+	 * operate below IPV6_MIN_MTU, so treat that like disable_ipv6 and do
+	 * not keep addresses without their host routes.
 	 */
-	if (!unregister && !idev->cnf.disable_ipv6) {
+	if (!unregister && !idev->cnf.disable_ipv6 &&
+	    dev->mtu >= IPV6_MIN_MTU) {
 		/* aggregate the system setting and interface setting */
 		int _keep_addr = READ_ONCE(net->ipv6.devconf_all->keep_addr_on_down);
 

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Subject: test
Author: ihaveihaveihavea@gmail.com

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
master

Testing patch for syzbot bug 97a62389c5611b0477f3.

Forwarded: test

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Subject: test
Author: yun.zhou@windriver.com

#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

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#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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#syz test

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Subject: test
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#syz test
diff --git a/fs/jfs/jfs_txnmgr.h b/fs/jfs/jfs_txnmgr.h
index ba71eb5ced56..391c0d28e1bc 100644
--- a/fs/jfs/jfs_txnmgr.h
+++ b/fs/jfs/jfs_txnmgr.h
@@ -165,7 +165,7 @@ struct linelock {
        u8 l2linesize;          /* 1: log2 of linesize */
        /* (8) */

-       struct lv lv[20];       /* 40: */
+       struct lv lv[]; /* 40: */
 };                             /* (48) */

 #define dt_lock        linelock

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#syz test

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#syz test

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#syz test

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Subject: test
Author: kriish.sharma2006@gmail.com

#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
566771afc7a8