syzbot

kvm_intel: L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
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WARNING: CPU: 1 PID: 381 at mm/page_alloc.c:5234 __alloc_pages_noprof+0x109/0x7e0 mm/page_alloc.c:5234
Modules linked in:
CPU: 1 UID: 0 PID: 381 Comm: syz.2.17 Not tainted syzkaller #0 2e88900194e885de5c8b36fd08cb790c546b675d
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__alloc_pages_noprof+0x109/0x7e0 mm/page_alloc.c:5234
Code: 00 0f 1f 44 00 00 83 fb 0b 72 28 b8 00 20 00 00 23 44 24 40 75 1d 80 3d ea a0 0b 06 00 0f 85 c2 00 00 00 c6 05 dd a0 0b 06 01 <0f> 0b 31 c0 e9 b4 00 00 00 83 fb 0a 0f 87 a9 00 00 00 44 8b 64 24
RSP: 0018:ffffc90000fef980 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000034 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000fefa38
RBP: ffffc90000fefaa8 R08: ffffc90000fefa37 R09: 0000000000000000
R10: ffffc90000fefa20 R11: fffff520001fdf47 R12: ffffc90000fef9c0
R13: dffffc0000000000 R14: 1ffff920001fdf34 R15: 0000000000000000
FS:  0000555591851500(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc5f94708c0 CR3: 000000012e73e000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 ___kmalloc_large_node+0x81/0x210 mm/slub.c:-1
 __kmalloc_large_node_noprof+0x1e/0xd0 mm/slub.c:4367
 __do_kmalloc_node mm/slub.c:4383 [inline]
 __kmalloc_noprof+0x326/0x500 mm/slub.c:4407
 kmalloc_noprof include/linux/slab.h:885 [inline]
 kzalloc_noprof include/linux/slab.h:1017 [inline]
 ioctl_set_read_timeouts fs/incfs/pseudo_files.c:969 [inline]
 pending_reads_dispatch_ioctl+0xc86/0x2080 fs/incfs/pseudo_files.c:1039
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fc5f959aeb9
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:00007ffeced8fc38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc5f9815fa0 RCX: 00007fc5f959aeb9
RDX: 00002000000000c0 RSI: 0000000040106726 RDI: 0000000000000007
RBP: 00007fc5f9608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc5f9815fac R14: 00007fc5f9815fa0 R15: 00007fc5f9815fa0
 </TASK>
---[ end trace 0000000000000000 ]---