================================================================== BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:373 [inline] BUG: KASAN: slab-use-after-free in gfs2_discard fs/gfs2/aops.c:617 [inline] BUG: KASAN: slab-use-after-free in gfs2_invalidate_folio+0x718/0x820 fs/gfs2/aops.c:655 Read of size 8 at addr ffff88803c929168 by task syz-executor.0/5417 CPU: 3 PID: 5417 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-ge88c4cfcb7b8 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 list_empty include/linux/list.h:373 [inline] gfs2_discard fs/gfs2/aops.c:617 [inline] gfs2_invalidate_folio+0x718/0x820 fs/gfs2/aops.c:655 folio_invalidate mm/truncate.c:158 [inline] truncate_cleanup_folio+0x2ac/0x3e0 mm/truncate.c:178 truncate_inode_pages_range+0x271/0xe90 mm/truncate.c:358 gfs2_evict_inode+0x75b/0x1460 fs/gfs2/super.c:1508 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 gfs2_put_super+0x2bd/0x760 fs/gfs2/super.c:625 generic_shutdown_super+0x159/0x3d0 fs/super.c:641 kill_block_super+0x3b/0x90 fs/super.c:1675 gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbabdc7f197 Code: b0 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 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fff0016dd38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fbabdc7f197 RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff0016ddf0 RBP: 00007fff0016ddf0 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff0016eeb0 R13: 00007fbabdcc93b9 R14: 00000000000134ec R15: 0000000000000001 Allocated by task 5417: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc+0x136/0x320 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_data+0x4b3/0x7f0 fs/gfs2/trans.c:209 gfs2_unstuffer_folio fs/gfs2/bmap.c:81 [inline] __gfs2_unstuff_inode fs/gfs2/bmap.c:119 [inline] gfs2_unstuff_dinode+0xad9/0x1460 fs/gfs2/bmap.c:166 gfs2_adjust_quota+0x124/0xb10 fs/gfs2/quota.c:879 do_sync+0xa73/0xd30 fs/gfs2/quota.c:990 gfs2_quota_sync+0x419/0x630 fs/gfs2/quota.c:1370 gfs2_sync_fs+0x44/0xb0 fs/gfs2/super.c:669 sync_filesystem+0x10d/0x290 fs/sync.c:56 generic_shutdown_super+0x7e/0x3d0 fs/super.c:620 kill_block_super+0x3b/0x90 fs/super.c:1675 gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5417: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0x12e/0x380 mm/slub.c:4344 trans_drain fs/gfs2/log.c:1028 [inline] gfs2_log_flush+0x1486/0x29b0 fs/gfs2/log.c:1167 do_sync+0x550/0xd30 fs/gfs2/quota.c:1010 gfs2_quota_sync+0x419/0x630 fs/gfs2/quota.c:1370 gfs2_sync_fs+0x44/0xb0 fs/gfs2/super.c:669 sync_filesystem+0x10d/0x290 fs/sync.c:56 generic_shutdown_super+0x7e/0x3d0 fs/super.c:620 kill_block_super+0x3b/0x90 fs/super.c:1675 gfs2_kill_sb+0x360/0x410 fs/gfs2/ops_fstype.c:1804 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88803c929150 which belongs to the cache gfs2_bufdata of size 80 The buggy address is located 24 bytes inside of freed 80-byte region [ffff88803c929150, ffff88803c9291a0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3c929 flags: 0xfff80000000800(slab|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000800 ffff888016381cc0 dead000000000122 0000000000000000 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 5417, tgid -1703121402 (syz-executor.0), ts 5417, free_ts 79887214436 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x66d/0x1790 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc+0x2e9/0x320 mm/slub.c:3852 kmem_cache_zalloc include/linux/slab.h:739 [inline] gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_meta+0xade/0xf50 fs/gfs2/trans.c:251 gfs2_alloc_extent fs/gfs2/rgrp.c:2239 [inline] gfs2_alloc_blocks+0x46c/0x19c0 fs/gfs2/rgrp.c:2449 __gfs2_unstuff_inode fs/gfs2/bmap.c:107 [inline] gfs2_unstuff_dinode+0x499/0x1460 fs/gfs2/bmap.c:166 gfs2_adjust_quota+0x124/0xb10 fs/gfs2/quota.c:879 do_sync+0xa73/0xd30 fs/gfs2/quota.c:990 gfs2_quota_sync+0x419/0x630 fs/gfs2/quota.c:1370 gfs2_sync_fs+0x44/0xb0 fs/gfs2/super.c:669 sync_filesystem+0x10d/0x290 fs/sync.c:56 generic_shutdown_super+0x7e/0x3d0 fs/super.c:620 page last free pid 54 tgid 54 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487 kasan_depopulate_vmalloc_pte+0x63/0x80 mm/kasan/shadow.c:408 apply_to_pte_range mm/memory.c:2744 [inline] apply_to_pmd_range mm/memory.c:2788 [inline] apply_to_pud_range mm/memory.c:2824 [inline] apply_to_p4d_range mm/memory.c:2860 [inline] __apply_to_page_range+0x57b/0xdc0 mm/memory.c:2894 kasan_release_vmalloc+0xac/0xc0 mm/kasan/shadow.c:525 purge_vmap_node+0x3fc/0x920 mm/vmalloc.c:2183 __purge_vmap_area_lazy+0x9ca/0xc10 mm/vmalloc.c:2265 _vm_unmap_aliases+0x29c/0xbd0 mm/vmalloc.c:2843 vm_reset_perms mm/vmalloc.c:3251 [inline] vfree+0x533/0x7a0 mm/vmalloc.c:3330 bpf_prog_unlock_free include/linux/filter.h:930 [inline] bpf_jit_free include/linux/filter.h:1218 [inline] bpf_prog_free_deferred+0x466/0x630 kernel/bpf/core.c:2783 process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254 process_scheduled_works kernel/workqueue.c:3335 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416 kthread+0x2c1/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 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: ffff88803c929000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb ffff88803c929080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb >ffff88803c929100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb ^ ffff88803c929180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb ffff88803c929200: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================