==================================================================
BUG: KASAN: use-after-free in user_mode arch/x86/include/asm/ptrace.h:131 [inline]
BUG: KASAN: use-after-free in trace_page_fault_entries arch/x86/mm/fault.c:1516 [inline]
BUG: KASAN: use-after-free in do_page_fault+0x6d/0x320 arch/x86/mm/fault.c:1528
Read of size 8 at addr ffff8881ea817e40 by task syz.2.466/2111

CPU: 0 PID: 2111 Comm: syz.2.466 Not tainted 5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:

The buggy address belongs to the page:
page:ffffea0007aa05c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0
flags: 0x8000000000000000()
raw: 8000000000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x152dc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO)
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook mm/page_alloc.c:2165 [inline]
 prep_new_page+0x35e/0x370 mm/page_alloc.c:2171
 get_page_from_freelist+0x1296/0x1310 mm/page_alloc.c:3794
 __alloc_pages_nodemask+0x202/0x4b0 mm/page_alloc.c:4894
 __alloc_pages include/linux/gfp.h:503 [inline]
 __alloc_pages_node include/linux/gfp.h:516 [inline]
 alloc_pages_node include/linux/gfp.h:530 [inline]
 kmalloc_order mm/slab_common.c:1342 [inline]
 kmalloc_order_trace+0x31/0x100 mm/slab_common.c:1358
 kmalloc_large include/linux/slab.h:485 [inline]
 __kmalloc+0x162/0x2f0 mm/slub.c:3902
 __kmalloc_node include/linux/slab.h:422 [inline]
 kmalloc_node include/linux/slab.h:599 [inline]
 kvmalloc_node+0x88/0xf0 mm/util.c:596
 kvmalloc include/linux/mm.h:761 [inline]
 kvzalloc include/linux/mm.h:769 [inline]
 bpf_check+0xfb/0x9cf0 kernel/bpf/verifier.c:9561
 bpf_prog_load+0xa5f/0xe10 kernel/bpf/syscall.c:1724
 __do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
 __se_sys_bpf+0x435/0x570 kernel/bpf/syscall.c:2849
 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:2849
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1176 [inline]
 __free_pages_ok+0x7e4/0x910 mm/page_alloc.c:1438
 free_the_page mm/page_alloc.c:4956 [inline]
 __free_pages+0x8c/0x110 mm/page_alloc.c:4962
 kfree+0x1ca/0x260 mm/slub.c:4068
 kvfree+0x4c/0x50 mm/util.c:625
 bpf_check+0x8371/0x9cf0 kernel/bpf/verifier.c:9731
 bpf_prog_load+0xa5f/0xe10 kernel/bpf/syscall.c:1724
 __do_sys_bpf kernel/bpf/syscall.c:2891 [inline]
 __se_sys_bpf+0x435/0x570 kernel/bpf/syscall.c:2849
 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:2849
 do_syscall_64+0xcf/0x170 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1

Memory state around the buggy address:
 ffff8881ea817d00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff8881ea817d80: ff ff ff ff 00 00 00 00 00 00 00 00 ff ff ff ff
>ffff8881ea817e00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                                           ^
 ffff8881ea817e80: ff ff ff ff f1 f1 f1 f1 00 f2 f2 f2 04 f3 f3 f3
 ffff8881ea817f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
PANIC: double fault, error_code: 0x0
CPU: 0 PID: 2111 Comm: syz.2.466 Tainted: G    B             5.4.292-syzkaller-00021-gcd8e74fa0fa3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:check_preemption_disabled+0x27/0x300 lib/smp_processor_id.c:13
Code: c3 66 90 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec 80 00 00 00 49 89 f7 49 89 fc 65 48 8b 04 25 28 00 00 00 <48> 89 44 24 60 48 c7 44 24 20 b3 8a b5 41 48 c7 44 24 28 2c 1b 3c
RSP: 0018:ffff8881e95d6f80 EFLAGS: 00010082
RAX: f0a00cbb41416400 RBX: dffffc0000000000 RCX: 0000000000080000
RDX: ffffc90001948000 RSI: ffffffff84da3260 RDI: ffffffff84da3220
RBP: ffff8881e95d7040 R08: dffffc0000000000 R09: fffffbfff0c576a6
R10: fffffbfff0c576a6 R11: 1ffffffff0c576a5 R12: ffffffff84da3220
R13: ffffffff85cb57a0 R14: ffffffff85cb5818 R15: ffffffff84da3260
FS:  00007fa83a0246c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff8881e95d6f78 CR3: 00000001f5c2a000 CR4: 00000000003406b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
----------------
Code disassembly (best guess):
   0:	c3                   	ret
   1:	66 90                	xchg   %ax,%ax
   3:	55                   	push   %rbp
   4:	48 89 e5             	mov    %rsp,%rbp
   7:	41 57                	push   %r15
   9:	41 56                	push   %r14
   b:	41 55                	push   %r13
   d:	41 54                	push   %r12
   f:	53                   	push   %rbx
  10:	48 83 e4 e0          	and    $0xffffffffffffffe0,%rsp
  14:	48 81 ec 80 00 00 00 	sub    $0x80,%rsp
  1b:	49 89 f7             	mov    %rsi,%r15
  1e:	49 89 fc             	mov    %rdi,%r12
  21:	65 48 8b 04 25 28 00 	mov    %gs:0x28,%rax
  28:	00 00
* 2a:	48 89 44 24 60       	mov    %rax,0x60(%rsp) <-- trapping instruction
  2f:	48 c7 44 24 20 b3 8a 	movq   $0x41b58ab3,0x20(%rsp)
  36:	b5 41
  38:	48                   	rex.W
  39:	c7                   	.byte 0xc7
  3a:	44 24 28             	rex.R and $0x28,%al
  3d:	2c 1b                	sub    $0x1b,%al
  3f:	3c                   	.byte 0x3c