================================================================== BUG: KASAN: stack-out-of-bounds in gfs2_dump_glock+0x14b3/0x1ad0 Read of size 8 at addr ffffc90003dcfcc0 by task syz-executor.0/5762 CPU: 1 PID: 5762 Comm: syz-executor.0 Not tainted 6.5.0-syzkaller-11704-g3f86ed6ec0b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __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:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 gfs2_dump_glock+0x14b3/0x1ad0 gfs2_consist_inode_i+0xf5/0x110 fs/gfs2/util.c:448 gfs2_dirent_scan+0x512/0x640 fs/gfs2/dir.c:602 gfs2_dirent_search+0x30e/0x8c0 fs/gfs2/dir.c:850 gfs2_dir_search+0xb2/0x2f0 fs/gfs2/dir.c:1650 gfs2_lookupi+0x460/0x5d0 fs/gfs2/inode.c:332 __gfs2_lookup+0xa4/0x270 fs/gfs2/inode.c:888 gfs2_atomic_open+0x9e/0x230 fs/gfs2/inode.c:1289 atomic_open fs/namei.c:3358 [inline] lookup_open fs/namei.c:3466 [inline] open_last_lookups fs/namei.c:3563 [inline] path_openat+0x1044/0x3180 fs/namei.c:3793 do_filp_open+0x234/0x490 fs/namei.c:3823 do_sys_openat2+0x13e/0x1d0 fs/open.c:1422 do_sys_open fs/open.c:1437 [inline] __do_sys_open fs/open.c:1445 [inline] __se_sys_open fs/open.c:1441 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1441 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: 0033:0x7f3051e7c959 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3052afa0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f3051f9c050 RCX: 00007f3051e7c959 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200025c0 RBP: 00007f3051ed8c88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f3051f9c050 R15: 00007ffd0db17948 The buggy address belongs to the virtual mapping at [ffffc90003dc8000, ffffc90003dd1000) created by: copy_process+0x5c8/0x4290 kernel/fork.c:2327 The buggy address belongs to the physical page: page:ffffea0001c31e80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x70c7a memcg:ffff888027ee0a82 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888027ee0a82 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 2, tgid 2 (kthreadd), ts 54079272126, free_ts 15175305943 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31ec/0x3370 mm/page_alloc.c:3183 __alloc_pages+0x255/0x670 mm/page_alloc.c:4439 vm_area_alloc_pages mm/vmalloc.c:3063 [inline] __vmalloc_area_node mm/vmalloc.c:3139 [inline] __vmalloc_node_range+0x9a3/0x1490 mm/vmalloc.c:3320 alloc_thread_stack_node kernel/fork.c:309 [inline] dup_task_struct+0x3e5/0x7d0 kernel/fork.c:1118 copy_process+0x5c8/0x4290 kernel/fork.c:2327 kernel_clone+0x22d/0x7b0 kernel/fork.c:2909 kernel_thread+0x1bc/0x230 kernel/fork.c:2971 create_kthread kernel/kthread.c:411 [inline] kthreadd+0x600/0x820 kernel/kthread.c:746 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 free_contig_range+0x9e/0x150 mm/page_alloc.c:6355 destroy_args+0x95/0x7c0 mm/debug_vm_pgtable.c:1028 debug_vm_pgtable+0x4ac/0x540 mm/debug_vm_pgtable.c:1408 do_one_initcall+0x23d/0x7d0 init/main.c:1232 do_initcall_level+0x157/0x210 init/main.c:1294 do_initcalls+0x3f/0x80 init/main.c:1310 kernel_init_freeable+0x440/0x5d0 init/main.c:1547 kernel_init+0x1d/0x2a0 init/main.c:1437 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Memory state around the buggy address: ffffc90003dcfb80: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00 ffffc90003dcfc00: 00 f2 f2 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 00 >ffffc90003dcfc80: 00 00 00 00 00 00 00 00 f3 f3 f3 f3 00 00 00 00 ^ ffffc90003dcfd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003dcfd80: f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00 00 00 00 00 ==================================================================