loop0: detected capacity change from 0 to 1024
EXT4-fs: Ignoring removed nomblk_io_submit option
EXT4-fs (loop0): ext4_check_descriptors: Inode bitmap for group 0 overlaps block group descriptors
EXT4-fs (loop0): ext4_check_descriptors: Checksum for group 0 failed (12687!=20869)
EXT4-fs (loop0): orphan cleanup on readonly fs
EXT4-fs warning (device loop0): ext4_enable_quotas:7156: Failed to enable quota tracking (type=0, err=-22, ino=3). Please run e2fsck to fix.
EXT4-fs (loop0): Cannot turn on quotas: error -22
EXT4-fs error (device loop0): ext4_orphan_get:1415: comm syz.0.0: bad orphan inode 8
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 ro without journal. Quota mode: writeback.
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in vrealloc_noprof+0x341/0x3d0 mm/vmalloc.c:4095
Write of size 4064 at addr ffffc9000d551020 by task syz.0.0/5322

CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 Not tainted 6.13.0-rc3-syzkaller-00026-g59dbb9d81adf #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:489
 kasan_report+0x143/0x180 mm/kasan/report.c:602
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memset+0x23/0x50 mm/kasan/shadow.c:84
 vrealloc_noprof+0x341/0x3d0 mm/vmalloc.c:4095
 push_insn_history+0x16c/0x6a0 kernel/bpf/verifier.c:3575
 do_check+0x692f/0xfcd0 kernel/bpf/verifier.c:18590
 do_check_common+0x1564/0x2010 kernel/bpf/verifier.c:21844
 do_check_main kernel/bpf/verifier.c:21935 [inline]
 bpf_check+0x804e/0x1fc90 kernel/bpf/verifier.c:22661
 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2947
 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5790
 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5895 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895
 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: 0033:0x7fcaaff85d29
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:00007fcaaf9fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007fcab0175fa0 RCX: 00007fcaaff85d29
RDX: 0000000000000048 RSI: 00000000200017c0 RDI: 0000000000000005
RBP: 00007fcab0001a20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fcab0175fa0 R15: 00007ffd29391d78
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc9000d531000, ffffc9000d553000) created by:
 kvrealloc_noprof+0xc7/0x120 mm/util.c:747

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888040f37e40 pfn:0x40f37
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: ffff888040f37e40 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 0x102cc2(GFP_HIGHUSER|__GFP_NOWARN), pid 5322, tgid 5321 (syz.0.0), ts 71863101551, free_ts 71155702130
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556
 prep_new_page mm/page_alloc.c:1564 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474
 __alloc_pages_slowpath+0x414/0x1020 mm/page_alloc.c:4286
 __alloc_pages_noprof+0x49b/0x710 mm/page_alloc.c:4764
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269
 vm_area_alloc_pages mm/vmalloc.c:3589 [inline]
 __vmalloc_area_node mm/vmalloc.c:3667 [inline]
 __vmalloc_node_range_noprof+0x9c9/0x1380 mm/vmalloc.c:3844
 __kvmalloc_node_noprof+0x142/0x190 mm/util.c:672
 kvrealloc_noprof+0xc7/0x120 mm/util.c:747
 push_insn_history+0x16c/0x6a0 kernel/bpf/verifier.c:3575
 do_check+0x692f/0xfcd0 kernel/bpf/verifier.c:18590
 do_check_common+0x1564/0x2010 kernel/bpf/verifier.c:21844
 do_check_main kernel/bpf/verifier.c:21935 [inline]
 bpf_check+0x804e/0x1fc90 kernel/bpf/verifier.c:22661
 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2947
 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5790
 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5895 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895
 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 52 tgid 52 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2657
 discard_slab mm/slub.c:2688 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3157
 put_cpu_partial+0x17c/0x250 mm/slub.c:3232
 __slab_free+0x290/0x380 mm/slub.c:4483
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4119 [inline]
 slab_alloc_node mm/slub.c:4168 [inline]
 __kmalloc_cache_noprof+0x1d9/0x390 mm/slub.c:4324
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 nsim_fib4_rt_create drivers/net/netdevsim/fib.c:280 [inline]
 nsim_fib4_rt_insert drivers/net/netdevsim/fib.c:426 [inline]
 nsim_fib4_event drivers/net/netdevsim/fib.c:464 [inline]
 nsim_fib_event drivers/net/netdevsim/fib.c:884 [inline]
 nsim_fib_event_work+0xe1a/0x4130 drivers/net/netdevsim/fib.c:1493
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391
 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:
 ffffc9000d550f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000d550f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000d551000: 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                               ^
 ffffc9000d551080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc9000d551100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================