==================================================================
BUG: KASAN: slab-out-of-bounds in btf_name_valid_section kernel/bpf/btf.c:824 [inline]
BUG: KASAN: slab-out-of-bounds in btf_datasec_check_meta+0x2c9/0x9a0 kernel/bpf/btf.c:4693
Read of size 1 at addr ffff888069902d74 by task syz.4.1357/10754

CPU: 0 UID: 0 PID: 10754 Comm: syz.4.1357 Not tainted 6.11.0-rc4-syzkaller-00326-g5277d130947b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 btf_name_valid_section kernel/bpf/btf.c:824 [inline]
 btf_datasec_check_meta+0x2c9/0x9a0 kernel/bpf/btf.c:4693
 btf_check_meta kernel/bpf/btf.c:5175 [inline]
 btf_check_all_metas kernel/bpf/btf.c:5199 [inline]
 btf_parse_type_sec+0x4d5/0x2620 kernel/bpf/btf.c:5335
 btf_parse kernel/bpf/btf.c:5763 [inline]
 btf_new_fd+0x43f/0xd30 kernel/bpf/btf.c:7683
 __sys_bpf+0x6ef/0x810 kernel/bpf/syscall.c:5762
 __do_sys_bpf kernel/bpf/syscall.c:5824 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5822 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5822
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d9757def9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2d96fff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f2d97735f80 RCX: 00007f2d9757def9
RDX: 0000000000000028 RSI: 0000000020000440 RDI: 0000000000000012
RBP: 00007f2d975f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2d97735f80 R15: 00007fffe728e4b8
 </TASK>

Allocated by task 10754:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:4158 [inline]
 __kmalloc_node_noprof+0x22a/0x440 mm/slub.c:4164
 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650
 btf_parse kernel/bpf/btf.c:5739 [inline]
 btf_new_fd+0x265/0xd30 kernel/bpf/btf.c:7683
 __sys_bpf+0x6ef/0x810 kernel/bpf/syscall.c:5762
 __do_sys_bpf kernel/bpf/syscall.c:5824 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5822 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5822
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888069902c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes to the right of
 allocated 372-byte region [ffff888069902c00, ffff888069902d74)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x69900
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff88801ac41c80 ffffea0000c82c00 dead000000000002
raw: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff88801ac41c80 ffffea0000c82c00 dead000000000002
head: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000
head: 00fff00000000002 ffffea0001a64001 ffffffffffffffff 0000000000000000
head: 0000000700000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5376, tgid 5376 (udevd), ts 121211016671, free_ts 120808824064
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2321
 allocate_slab+0x5a/0x2f0 mm/slub.c:2484
 new_slab mm/slub.c:2537 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
 __slab_alloc+0x58/0xa0 mm/slub.c:3813
 __slab_alloc_node mm/slub.c:3866 [inline]
 slab_alloc_node mm/slub.c:4025 [inline]
 __kmalloc_cache_noprof+0x1d5/0x2c0 mm/slub.c:4184
 kmalloc_noprof include/linux/slab.h:681 [inline]
 kzalloc_noprof include/linux/slab.h:807 [inline]
 kernfs_fop_open+0x3e0/0xd10 fs/kernfs/file.c:623
 do_dentry_open+0x970/0x1440 fs/open.c:959
 vfs_open+0x3e/0x330 fs/open.c:1089
 do_open fs/namei.c:3727 [inline]
 path_openat+0x2b3e/0x3470 fs/namei.c:3886
 do_filp_open+0x235/0x490 fs/namei.c:3913
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
 do_sys_open fs/open.c:1431 [inline]
 __do_sys_openat fs/open.c:1447 [inline]
 __se_sys_openat fs/open.c:1442 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1442
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
page last free pid 5285 tgid 5285 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2612
 stack_depot_save_flags+0x6f6/0x830 lib/stackdepot.c:666
 ref_tracker_free+0x114/0x7e0 lib/ref_tracker.c:240
 netdev_tracker_free include/linux/netdevice.h:4067 [inline]
 netdev_put include/linux/netdevice.h:4084 [inline]
 dst_destroy+0x171/0x460 net/core/dst.c:117
 rcu_do_batch kernel/rcu/tree.c:2569 [inline]
 rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2843
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 spin_unlock_bh include/linux/spinlock.h:396 [inline]
 nsim_fib_event_work+0x2b9/0x4130 drivers/net/netdevsim/fib.c:1487
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff888069902c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888069902c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888069902d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 04 fc
                                                             ^
 ffff888069902d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888069902e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================