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BUG: KASAN: stack-out-of-bounds in gfs2_dump_glock+0x15b1/0x1bb0
Read of size 8 at addr ffffc900030f7ca0 by task syz.8.1157/11620

CPU: 1 UID: 0 PID: 11620 Comm: syz.8.1157 Not tainted 6.13.0-rc1-next-20241205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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
 gfs2_dump_glock+0x15b1/0x1bb0
 gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:457
 gfs2_dirent_scan+0x52b/0x670
 gfs2_dirent_search+0x30e/0x8c0 fs/gfs2/dir.c:853
 gfs2_dir_search+0xb2/0x2f0 fs/gfs2/dir.c:1653
 gfs2_lookupi+0x461/0x5e0 fs/gfs2/inode.c:340
 __gfs2_lookup+0xa4/0x280 fs/gfs2/inode.c:897
 gfs2_atomic_open+0x9e/0x230 fs/gfs2/inode.c:1298
 atomic_open fs/namei.c:3509 [inline]
 lookup_open fs/namei.c:3620 [inline]
 open_last_lookups fs/namei.c:3748 [inline]
 path_openat+0x101b/0x3590 fs/namei.c:3984
 do_filp_open+0x27f/0x4e0 fs/namei.c:4014
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1395
 do_sys_open fs/open.c:1410 [inline]
 __do_sys_open fs/open.c:1418 [inline]
 __se_sys_open fs/open.c:1414 [inline]
 __x64_sys_open+0x225/0x270 fs/open.c:1414
 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: 0033:0x7f942577fed9
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:00007f94264c8058 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f9425946160 RCX: 00007f942577fed9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007f94257f3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9425946160 R15: 00007ffc46201318
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc900030f0000, ffffc900030f9000) created by:
 copy_process+0x5d1/0x3d80 kernel/fork.c:2223

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x51d pfn:0x4b8d6
memcg:ffff8880302f5802
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 000000000000051d 0000000000000000 00000001ffffffff ffff8880302f5802
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 11595, tgid 11595 (syz.8.1157), ts 479425401389, free_ts 479046274251
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1549
 prep_new_page mm/page_alloc.c:1557 [inline]
 get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3475
 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4752
 alloc_pages_mpol+0x30e/0x550 mm/mempolicy.c:2270
 alloc_frozen_pages_noprof mm/mempolicy.c:2340 [inline]
 alloc_pages_noprof+0x121/0x190 mm/mempolicy.c:2360
 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
 alloc_thread_stack_node kernel/fork.c:314 [inline]
 dup_task_struct+0x444/0x8c0 kernel/fork.c:1121
 copy_process+0x5d1/0x3d80 kernel/fork.c:2223
 kernel_clone+0x226/0x8e0 kernel/fork.c:2805
 __do_sys_clone3 kernel/fork.c:3109 [inline]
 __se_sys_clone3+0x2d8/0x360 kernel/fork.c:3088
 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
page last free pid 5945 tgid 5945 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe0d/0x10e0 mm/page_alloc.c:2658
 vfree+0x186/0x2e0 mm/vmalloc.c:3382
 delayed_vfree_work+0x56/0x80 mm/vmalloc.c:3303
 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:
 ffffc900030f7b80: 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900030f7c00: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00
>ffffc900030f7c80: 00 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00
                               ^
 ffffc900030f7d00: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
 ffffc900030f7d80: 04 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
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