ffff8880787c4020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
ffff8880787c4030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
==================================================================
BUG: KASAN: slab-out-of-bounds in hex_dump_to_buffer+0x731/0xba0 lib/hexdump.c:193
Read of size 1 at addr ffff8880787c4040 by task syz.3.89/5988

CPU: 1 PID: 5988 Comm: syz.3.89 Not tainted 6.10.0-rc5-syzkaller-00253-gde0a9f448633 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
 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
 hex_dump_to_buffer+0x731/0xba0 lib/hexdump.c:193
 print_hex_dump+0x13f/0x250 lib/hexdump.c:276
 ea_get+0xce7/0x1290 fs/jfs/xattr.c:563
 __jfs_getxattr+0xd5/0x380 fs/jfs/xattr.c:809
 __vfs_getxattr+0x433/0x470 fs/xattr.c:423
 smk_fetch+0xb1/0x140 security/smack/smack_lsm.c:306
 smack_d_instantiate+0x749/0xa50 security/smack/smack_lsm.c:3588
 security_d_instantiate+0x9f/0x100 security/security.c:3916
 d_splice_alias+0x6f/0x330 fs/dcache.c:2973
 jfs_lookup+0x2c0/0x410 fs/jfs/namei.c:1474
 __lookup_slow+0x28c/0x3f0 fs/namei.c:1692
 lookup_slow+0x53/0x70 fs/namei.c:1709
 walk_component fs/namei.c:2004 [inline]
 link_path_walk+0x9ea/0xea0 fs/namei.c:2331
 path_lookupat+0xa9/0x450 fs/namei.c:2492
 filename_lookup+0x256/0x610 fs/namei.c:2522
 user_path_at_empty+0x42/0x60 fs/namei.c:2929
 user_path_at include/linux/namei.h:58 [inline]
 do_sys_truncate+0xa7/0x190 fs/open.c:132
 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: 0033:0x7f9334f75b99
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:00007f9335c9b048 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f9335103fa0 RCX: 00007f9334f75b99
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000400
RBP: 00007f9334ff677e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f9335103fa0 R15: 00007ffe32fbdda8
 </TASK>

Allocated by task 5988:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4021
 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105
 alloc_inode fs/inode.c:261 [inline]
 iget_locked+0x1ad/0x850 fs/inode.c:1280
 jfs_iget+0x22/0x3b0 fs/jfs/inode.c:29
 jfs_lookup+0x226/0x410 fs/jfs/namei.c:1469
 __lookup_slow+0x28c/0x3f0 fs/namei.c:1692
 lookup_slow+0x53/0x70 fs/namei.c:1709
 walk_component fs/namei.c:2004 [inline]
 link_path_walk+0x9ea/0xea0 fs/namei.c:2331
 path_lookupat+0xa9/0x450 fs/namei.c:2492
 filename_lookup+0x256/0x610 fs/namei.c:2522
 user_path_at_empty+0x42/0x60 fs/namei.c:2929
 user_path_at include/linux/namei.h:58 [inline]
 do_sys_truncate+0xa7/0x190 fs/open.c:132
 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 ffff8880787c3780
 which belongs to the cache jfs_ip of size 2240
The buggy address is located 0 bytes to the right of
 allocated 2240-byte region [ffff8880787c3780, ffff8880787c4040)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x787c0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88801fad4401
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffefff(slab)
raw: 00fff00000000040 ffff888019776a00 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000001ffffefff ffff88801fad4401
head: 00fff00000000040 ffff888019776a00 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000001ffffefff ffff88801fad4401
head: 00fff00000000003 ffffea0001e1f001 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5988, tgid 5985 (syz.3.89), ts 108358148874, free_ts 105737530128
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473
 prep_new_page mm/page_alloc.c:1481 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683
 __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:2265
 allocate_slab+0x5a/0x2f0 mm/slub.c:2428
 new_slab mm/slub.c:2481 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667
 __slab_alloc+0x58/0xa0 mm/slub.c:3757
 __slab_alloc_node mm/slub.c:3810 [inline]
 slab_alloc_node mm/slub.c:3990 [inline]
 kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4021
 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105
 alloc_inode fs/inode.c:261 [inline]
 new_inode_pseudo+0x69/0x1e0 fs/inode.c:1007
 new_inode+0x22/0x1d0 fs/inode.c:1033
 jfs_fill_super+0x408/0xc50 fs/jfs/super.c:544
 mount_bdev+0x20a/0x2d0 fs/super.c:1659
 legacy_get_tree+0xee/0x190 fs/fs_context.c:662
 vfs_get_tree+0x90/0x2a0 fs/super.c:1780
 do_new_mount+0x2be/0xb40 fs/namespace.c:3352
page last free pid 5952 tgid 5952 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1093 [inline]
 free_unref_page+0xd19/0xea0 mm/page_alloc.c:2588
 __slab_free+0x31b/0x3d0 mm/slub.c:4349
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9e/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:322
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3940 [inline]
 slab_alloc_node mm/slub.c:4002 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4009
 anon_vma_chain_alloc mm/rmap.c:142 [inline]
 anon_vma_fork+0x1fa/0x580 mm/rmap.c:364
 dup_mmap kernel/fork.c:714 [inline]
 dup_mm kernel/fork.c:1688 [inline]
 copy_mm+0xdf3/0x2020 kernel/fork.c:1737
 copy_process+0x187a/0x3dc0 kernel/fork.c:2390
 kernel_clone+0x223/0x870 kernel/fork.c:2797
 __do_sys_clone kernel/fork.c:2940 [inline]
 __se_sys_clone kernel/fork.c:2924 [inline]
 __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2924
 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

Memory state around the buggy address:
 ffff8880787c3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880787c3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880787c4000: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
                                           ^
 ffff8880787c4080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8880787c4100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================