general p[  107.277660][ T5378] general protection fault, probably for non-canonical address 0xdffffcc020008009: 0000 [#1] PREEMPT SMP KASAN
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BUG: KASAN: out-of-bounds in user_mode arch/x86/include/asm/ptrace.h:136 [inline]
BUG: KASAN: out-of-bounds in page_fault_oops+0xa25/0xad0 arch/x86/mm/fault.c:642
Read of size 8 at addr ffffc9000366f590 by task udevd/5378

CPU: 0 PID: 5378 Comm: udevd Not tainted 6.6.0-rc3-syzkaller-00044-g633b47cb009d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 user_mode arch/x86/include/asm/ptrace.h:136 [inline]
 page_fault_oops+0xa25/0xad0 arch/x86/mm/fault.c:642
 do_user_addr_fault+0x53d/0x1000 arch/x86/mm/fault.c:1263
 handle_page_fault arch/x86/mm/fault.c:1505 [inline]
 exc_page_fault+0x5c/0xd0 arch/x86/mm/fault.c:1561
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:0x60100040048
Code: Unable to access opcode bytes at 0x6010004001e.
RSP: 0018:ffffc9000366f5b8 EFLAGS: 00010082
RAX: 0000000080000002 RBX: 0000060100040048 RCX: 0000000000000001
RDX: 0000000000000004 RSI: ffffffff8ae90f20 RDI: 0000000000000001
RBP: 0000000200000001 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000000026b4 R11: 205d383733355420 R12: 0000060100040048
R13: 0000000200000001 R14: fffffbfff24ac066 R15: dffffc0000000000
 </TASK>

The buggy address belongs to stack of task udevd/5378
 and is located at offset 536 in frame:
 page_fault_oops+0x0/0xad0 arch/x86/include/asm/pgtable_types.h:376

This frame has 5 objects:
 [32, 34) 'ldtr'
 [48, 52) 'level'
 [64, 74) 'idt'
 [96, 106) 'gdt'
 [128, 160) 'info'

The buggy address belongs to the virtual mapping at
 [ffffc90003668000, ffffc90003671000) created by:
 kernel_clone+0xfd/0x920 kernel/fork.c:2909

The buggy address belongs to the physical page:
page:ffffea00019a7780 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x669de
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 4486, tgid 4486 (udevd), ts 99773070417, free_ts 99713782497
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
 prep_new_page mm/page_alloc.c:1543 [inline]
 get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2298
 vm_area_alloc_pages mm/vmalloc.c:3063 [inline]
 __vmalloc_area_node mm/vmalloc.c:3139 [inline]
 __vmalloc_node_range+0xa6e/0x1540 mm/vmalloc.c:3320
 alloc_thread_stack_node kernel/fork.c:309 [inline]
 dup_task_struct kernel/fork.c:1118 [inline]
 copy_process+0x13e3/0x73f0 kernel/fork.c:2327
 kernel_clone+0xfd/0x920 kernel/fork.c:2909
 __do_sys_clone+0xba/0x100 kernel/fork.c:3052
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1136 [inline]
 free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
 slab_destroy mm/slab.c:1608 [inline]
 slabs_destroy+0x85/0xc0 mm/slab.c:1628
 cache_flusharray mm/slab.c:3341 [inline]
 ___cache_free+0x2b7/0x420 mm/slab.c:3404
 qlink_free mm/kasan/quarantine.c:166 [inline]
 qlist_free_all+0x4c/0x1b0 mm/kasan/quarantine.c:185
 kasan_quarantine_reduce+0x18e/0x1d0 mm/kasan/quarantine.c:292
 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305
 kasan_slab_alloc include/linux/kasan.h:188 [inline]
 slab_post_alloc_hook mm/slab.h:762 [inline]
 slab_alloc_node mm/slab.c:3237 [inline]
 kmem_cache_alloc_node+0x173/0x540 mm/slab.c:3509
 __alloc_skb+0x287/0x330 net/core/skbuff.c:640
 alloc_skb include/linux/skbuff.h:1286 [inline]
 alloc_skb_with_frags+0xe4/0x710 net/core/skbuff.c:6313
 sock_alloc_send_pskb+0x7e4/0x970 net/core/sock.c:2795
 unix_dgram_sendmsg+0x455/0x1c30 net/unix/af_unix.c:1953
 sock_sendmsg_nosec net/socket.c:730 [inline]
 sock_sendmsg+0xd9/0x180 net/socket.c:753
 sock_write_iter+0x29b/0x3d0 net/socket.c:1141
 call_write_iter include/linux/fs.h:1956 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x650/0xe40 fs/read_write.c:584
 ksys_write+0x1f0/0x250 fs/read_write.c:637

Memory state around the buggy address:
 ffffc9000366f480: 48 00 04 00 01 06 00 00 01 00 00 00 02 00 00 00
 ffffc9000366f500: 48 00 04 00 01 06 00 00 01 00 00 00 02 00 00 00
>ffffc9000366f580: 48 00 04 00 01 06 00 00 01 00 00 00 02 00 00 00
                         ^
 ffffc9000366f600: 48 00 04 00 01 06 00 00 01 00 00 00 02 00 00 00
 ffffc9000366f680: 48 00 04 00 01 06 00 00 01 00 00 00 02 00 00 00
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