R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffee8ace7c0 R13: 00007f1ee482cb55 R14: 00005555712664a8 R15: 00007ffee8acf890 ================================================================== BUG: KASAN: use-after-free in list_empty include/linux/list.h:290 [inline] BUG: KASAN: use-after-free in gfs2_discard fs/gfs2/aops.c:656 [inline] BUG: KASAN: use-after-free in gfs2_invalidatepage+0x4f8/0x830 fs/gfs2/aops.c:693 Read of size 8 at addr ffff888073fba0f8 by task syz-executor/4186 CPU: 1 PID: 4186 Comm: syz-executor Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 list_empty include/linux/list.h:290 [inline] gfs2_discard fs/gfs2/aops.c:656 [inline] gfs2_invalidatepage+0x4f8/0x830 fs/gfs2/aops.c:693 do_invalidatepage mm/truncate.c:157 [inline] truncate_cleanup_page+0x170/0x420 mm/truncate.c:176 truncate_inode_pages_range+0x236/0xef0 mm/truncate.c:325 gfs2_evict_inode+0xa81/0x11f0 fs/gfs2/super.c:1415 evict+0x485/0x870 fs/inode.c:647 gfs2_put_super+0x2fe/0x7d0 fs/gfs2/super.c:603 generic_shutdown_super+0x130/0x300 fs/super.c:475 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1139 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1ee47abcd7 Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffee8acd618 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007f1ee47abcd7 RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffee8ace7c0 RBP: 00007f1ee482cb55 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffee8ace7c0 R13: 00007f1ee482cb55 R14: 00005555712664a8 R15: 00007ffee8acf890 Allocated by task 4338: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] __kasan_slab_alloc+0x9c/0xd0 mm/kasan/common.c:467 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:725 [inline] gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_data+0x1fd/0x620 fs/gfs2/trans.c:209 gfs2_unstuffer_page fs/gfs2/bmap.c:83 [inline] __gfs2_unstuff_inode fs/gfs2/bmap.c:121 [inline] gfs2_unstuff_dinode+0xac0/0x13a0 fs/gfs2/bmap.c:168 gfs2_adjust_quota+0x234/0x810 fs/gfs2/quota.c:847 gfs2_set_dqblk+0x96e/0xc10 fs/gfs2/quota.c:1764 quota_setquota+0x4ac/0x530 fs/quota/quota.c:309 __do_sys_quotactl fs/quota/quota.c:959 [inline] __se_sys_quotactl+0x295/0x6c0 fs/quota/quota.c:915 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Freed by task 4186: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:46 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360 ____kasan_slab_free+0xd5/0x110 mm/kasan/common.c:366 kasan_slab_free include/linux/kasan.h:230 [inline] slab_free_hook mm/slub.c:1705 [inline] slab_free_freelist_hook+0xea/0x170 mm/slub.c:1731 slab_free mm/slub.c:3499 [inline] kmem_cache_free+0x8f/0x210 mm/slub.c:3515 trans_drain fs/gfs2/log.c:1015 [inline] gfs2_log_flush+0x1995/0x2610 fs/gfs2/log.c:1155 gfs2_kill_sb+0x50/0xd0 fs/gfs2/ops_fstype.c:1734 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1139 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888073fba0e0 which belongs to the cache gfs2_bufdata of size 80 The buggy address is located 24 bytes inside of 80-byte region [ffff888073fba0e0, ffff888073fba130) The buggy address belongs to the page: page:ffffea0001cfee80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x73fba flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000122 ffff888146cd1000 raw: 0000000000000000 0000000080240024 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 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 4338, ts 62053593006, free_ts 62052103620 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5474 alloc_slab_page mm/slub.c:1775 [inline] allocate_slab mm/slub.c:1912 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1975 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3008 __slab_alloc mm/slub.c:3095 [inline] slab_alloc_node mm/slub.c:3186 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x195/0x290 mm/slub.c:3233 kmem_cache_zalloc include/linux/slab.h:725 [inline] gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_meta+0x2ec/0x9e0 fs/gfs2/trans.c:250 init_dinode+0x9c/0xa20 fs/gfs2/inode.c:488 gfs2_create_inode+0xf3c/0x13b0 fs/gfs2/inode.c:751 gfs2_atomic_open+0xce/0x210 fs/gfs2/inode.c:1296 atomic_open fs/namei.c:3325 [inline] lookup_open fs/namei.c:3433 [inline] open_last_lookups fs/namei.c:3532 [inline] path_openat+0xe6d/0x2f30 fs/namei.c:3739 do_filp_open+0x1b3/0x3e0 fs/namei.c:3769 do_sys_openat2+0x142/0x4a0 fs/open.c:1253 do_sys_open fs/open.c:1269 [inline] __do_sys_openat fs/open.c:1285 [inline] __se_sys_openat fs/open.c:1280 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1280 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 free_slab mm/slub.c:2015 [inline] discard_slab mm/slub.c:2021 [inline] __unfreeze_partials+0x1a5/0x200 mm/slub.c:2507 put_cpu_partial+0x12d/0x190 mm/slub.c:2587 qlist_free_all+0x35/0x90 mm/kasan/quarantine.c:176 kasan_quarantine_reduce+0x150/0x160 mm/kasan/quarantine.c:283 __kasan_slab_alloc+0x2f/0xd0 mm/kasan/common.c:444 kasan_slab_alloc include/linux/kasan.h:254 [inline] slab_post_alloc_hook+0x4c/0x380 mm/slab.h:519 slab_alloc_node mm/slub.c:3220 [inline] slab_alloc mm/slub.c:3228 [inline] kmem_cache_alloc+0x100/0x290 mm/slub.c:3233 vm_area_dup+0x1e/0xb0 kernel/fork.c:358 __split_vma+0xb1/0x410 mm/mmap.c:2726 mprotect_fixup+0x50c/0x800 mm/mprotect.c:477 do_mprotect_pkey+0x657/0x910 mm/mprotect.c:636 __do_sys_mprotect mm/mprotect.c:662 [inline] __se_sys_mprotect mm/mprotect.c:659 [inline] __x64_sys_mprotect+0x7c/0x90 mm/mprotect.c:659 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 Memory state around the buggy address: ffff888073fb9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888073fba000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb >ffff888073fba080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb ^ ffff888073fba100: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc ffff888073fba180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================