syzbot
WARNING in linear_conf
Status:
upstream: reported on 2026/11/05 19:09
Reported-by: syzbot+34d30ba3238c6ca8b5fb@syzkaller.appspotmail.com
First crash: 7d18h, last: 7d18h
Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4321 at mm/page_alloc.c:5476 current_gfp_context include/linux/sched/mm.h:-1 [inline]
WARNING: CPU: 0 PID: 4321 at mm/page_alloc.c:5476 __alloc_pages+0x39f/0x480 mm/page_alloc.c:5488
Modules linked in:
CPU: 1 PID: 4321 Comm: syz.0.1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:__alloc_pages+0x39f/0x480 mm/page_alloc.c:5476
Code: 31 ff e9 b1 fe ff ff e8 bf e8 14 08 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 4f fd ff ff 4c 89 e7 e8 06 d3 09 00 e9 42 fd ff ff <0f> 0b 45 31 ff e9 ee fe ff ff 65 44 8b 2d 97 72 4d 7e 41 83 fd 08
RSP: 0018:ffffc900030ef640 EFLAGS: 00010246
RAX: ffffc900030ef680 RBX: 1ffff9200061decc RCX: 0000000000000000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc900030ef6a8
RBP: ffffc900030ef740 R08: ffffc900030ef6a7 R09: ffffc900030ef680
R10: dffffc0000000000 R11: fffff5200061ded5 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000040dc0 R15: 000000000000000b
FS: 00007f728526d6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32a22ff8 CR3: 000000005ec5a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
kmalloc_order+0x40/0x150 mm/slab_common.c:986
kmalloc_order_trace+0x14/0xf0 mm/slab_common.c:1002
kmalloc include/linux/slab.h:612 [inline]
kzalloc include/linux/slab.h:738 [inline]
linear_conf+0x48/0x890 drivers/md/md-linear.c:69
linear_run+0x71/0x140 drivers/md/md-linear.c:151
md_run+0xf41/0x2310 drivers/md/md.c:6022
do_md_run+0x30/0x400 drivers/md/md.c:6149
md_ioctl+0x2312/0x26f0 drivers/md/md.c:7804
blkdev_ioctl+0x347/0x6f0 block/ioctl.c:604
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7287016b19
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:00007f728526d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f728729cfa0 RCX: 00007f7287016b19
RDX: 0000200000000240 RSI: 00000000400c0930 RDI: 0000000000000004
RBP: 00007f72870aeb70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f728729d038 R14: 00007f728729cfa0 R15: 00007ffc8c8a17d8
</TASK>
* Struck through repros no longer work on HEAD.