================================================================== BUG: KASAN: stack-out-of-bounds in gfs2_dump_glock+0x1537/0x1b70 Read of size 8 at addr ffffc900058afcc0 by task syz-executor269/4534 CPU: 0 PID: 4534 Comm: syz-executor269 Not tainted 6.1.30-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 gfs2_dump_glock+0x1537/0x1b70 gfs2_consist_inode_i+0xf1/0x110 fs/gfs2/util.c:465 gfs2_dirent_scan+0x512/0x640 fs/gfs2/dir.c:602 gfs2_dirent_search+0x30a/0x8c0 fs/gfs2/dir.c:850 gfs2_dir_search+0xae/0x2f0 fs/gfs2/dir.c:1650 gfs2_lookupi+0x45f/0x5e0 fs/gfs2/inode.c:323 __gfs2_lookup+0xa0/0x270 fs/gfs2/inode.c:870 gfs2_atomic_open+0x9a/0x220 fs/gfs2/inode.c:1274 atomic_open fs/namei.c:3276 [inline] lookup_open fs/namei.c:3384 [inline] open_last_lookups fs/namei.c:3481 [inline] path_openat+0xf4e/0x2e60 fs/namei.c:3711 do_filp_open+0x230/0x480 fs/namei.c:3741 do_sys_openat2+0x13b/0x500 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_open fs/open.c:1342 [inline] __se_sys_open fs/open.c:1338 [inline] __x64_sys_open+0x221/0x270 fs/open.c:1338 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa45eb22179 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 d1 15 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:00007fa456eab318 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fa45ebb97b8 RCX: 00007fa45eb22179 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200025c0 RBP: 00007fa45ebb97b0 R08: 00007fa456eab700 R09: 0000000000000000 R10: 00007fa456eab700 R11: 0000000000000246 R12: 0030656c69662f2e R13: 00007ffe069d65af R14: 00007fa456eab400 R15: 0000000000022000 The buggy address belongs to the virtual mapping at [ffffc900058a8000, ffffc900058b1000) created by: copy_process+0x637/0x4020 kernel/fork.c:2090 The buggy address belongs to the physical page: page:ffffea0000a1df00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2877c flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 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 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 4526, tgid 4526 (syz-executor269), ts 780897127472, free_ts 780846560151 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2533 prep_new_page mm/page_alloc.c:2540 [inline] get_page_from_freelist+0x32ed/0x3480 mm/page_alloc.c:4292 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5559 vm_area_alloc_pages mm/vmalloc.c:2979 [inline] __vmalloc_area_node mm/vmalloc.c:3047 [inline] __vmalloc_node_range+0x96c/0x1460 mm/vmalloc.c:3219 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct+0x3e5/0x6d0 kernel/fork.c:980 copy_process+0x637/0x4020 kernel/fork.c:2090 kernel_clone+0x222/0x920 kernel/fork.c:2679 __do_sys_clone kernel/fork.c:2820 [inline] __se_sys_clone kernel/fork.c:2804 [inline] __x64_sys_clone+0x231/0x280 kernel/fork.c:2804 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1460 [inline] free_pcp_prepare mm/page_alloc.c:1510 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3388 free_unref_page_list+0x107/0x810 mm/page_alloc.c:3530 release_pages+0x2836/0x2b40 mm/swap.c:1055 __pagevec_release+0x80/0xf0 mm/swap.c:1075 pagevec_release include/linux/pagevec.h:71 [inline] folio_batch_release include/linux/pagevec.h:135 [inline] truncate_inode_pages_range+0x48a/0x1340 mm/truncate.c:373 kill_bdev block/bdev.c:76 [inline] blkdev_flush_mapping+0x154/0x2b0 block/bdev.c:662 blkdev_put_whole block/bdev.c:693 [inline] blkdev_put+0x4c0/0x750 block/bdev.c:953 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffffc900058afb80: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00 ffffc900058afc00: 00 f2 f2 f2 f2 f2 00 f2 f2 f2 00 00 00 00 00 00 >ffffc900058afc80: 00 00 00 00 00 00 00 00 f3 f3 f3 f3 00 00 00 00 ^ ffffc900058afd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc900058afd80: f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00 00 00 00 00 ==================================================================