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BUG: KASAN: slab-out-of-bounds in xfs_getbmap+0x1c06/0x1c90 fs/xfs/xfs_bmap_util.c:561
Read of size 4 at addr ffff88803218bff8 by task syz-executor.5/22237

CPU: 1 PID: 22237 Comm: syz-executor.5 Not tainted 6.3.0-syzkaller-12378-gc8c655c34e33 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:351 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:462
 kasan_report+0x176/0x1b0 mm/kasan/report.c:572
 xfs_getbmap+0x1c06/0x1c90 fs/xfs/xfs_bmap_util.c:561
 xfs_ioc_getbmap+0x243/0x7a0 fs/xfs/xfs_ioctl.c:1481
 xfs_file_ioctl+0xbf5/0x16a0 fs/xfs/xfs_ioctl.c:1949
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb56248c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb563275168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb5625ac120 RCX: 00007fb56248c169
RDX: 0000000020000140 RSI: 00000000c0205826 RDI: 0000000000000007
RBP: 00007fb5624e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff892635ef R14: 00007fb563275300 R15: 0000000000022000
 </TASK>

Allocated by task 5048:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:966 [inline]
 __kmalloc+0xb9/0x230 mm/slab_common.c:979
 kmalloc_array include/linux/slab.h:596 [inline]
 kcalloc include/linux/slab.h:627 [inline]
 cache_create_net+0x83/0x270 net/sunrpc/cache.c:1749
 rsc_cache_create_net net/sunrpc/auth_gss/svcauth_gss.c:2065 [inline]
 gss_svc_init_net+0x58/0x580 net/sunrpc/auth_gss/svcauth_gss.c:2093
 ops_init+0x351/0x600 net/core/net_namespace.c:136
 setup_net+0x4b9/0xb90 net/core/net_namespace.c:339
 copy_net_ns+0x4cb/0x790 net/core/net_namespace.c:491
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x122/0x170 kernel/nsproxy.c:228
 ksys_unshare+0x584/0xb20 kernel/fork.c:3444
 __do_sys_unshare kernel/fork.c:3515 [inline]
 __se_sys_unshare kernel/fork.c:3513 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3513
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff888032188000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 8184 bytes to the right of
 allocated 8192-byte region [ffff888032188000, ffff88803218a000)

The buggy address belongs to the physical page:
page:ffffea0000c86200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32188
head:ffffea0000c86200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012442280 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5048, tgid 5048 (syz-executor.5), ts 316974594919, free_ts 0
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1722
 prep_new_page mm/page_alloc.c:1729 [inline]
 get_page_from_freelist+0x321c/0x33a0 mm/page_alloc.c:3493
 __alloc_pages+0x255/0x670 mm/page_alloc.c:4759
 alloc_slab_page+0x6a/0x160 mm/slub.c:1851
 allocate_slab mm/slub.c:1998 [inline]
 new_slab+0x84/0x2f0 mm/slub.c:2051
 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3192
 __slab_alloc mm/slub.c:3291 [inline]
 __slab_alloc_node mm/slub.c:3344 [inline]
 slab_alloc_node mm/slub.c:3441 [inline]
 __kmem_cache_alloc_node+0x1b8/0x290 mm/slub.c:3490
 __do_kmalloc_node mm/slab_common.c:965 [inline]
 __kmalloc+0xa8/0x230 mm/slab_common.c:979
 kmalloc_array include/linux/slab.h:596 [inline]
 kcalloc include/linux/slab.h:627 [inline]
 cache_create_net+0x83/0x270 net/sunrpc/cache.c:1749
 rsc_cache_create_net net/sunrpc/auth_gss/svcauth_gss.c:2065 [inline]
 gss_svc_init_net+0x58/0x580 net/sunrpc/auth_gss/svcauth_gss.c:2093
 ops_init+0x351/0x600 net/core/net_namespace.c:136
 setup_net+0x4b9/0xb90 net/core/net_namespace.c:339
 copy_net_ns+0x4cb/0x790 net/core/net_namespace.c:491
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x122/0x170 kernel/nsproxy.c:228
 ksys_unshare+0x584/0xb20 kernel/fork.c:3444
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88803218be80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803218bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803218bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff88803218c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803218c080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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