gfs2: fsid=syz:syz.0: gfs2_evict_inode: -5 ================================================================== 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:587 [inline] BUG: KASAN: slab-use-after-free in gfs2_invalidate_folio+0x448/0x740 fs/gfs2/aops.c:625 Read of size 8 at addr ffff888043326e88 by task syz.0.0/5325 CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted 6.13.0-rc2-syzkaller-00018-g7cb1b4663150 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __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 list_empty include/linux/list.h:373 [inline] gfs2_discard fs/gfs2/aops.c:587 [inline] gfs2_invalidate_folio+0x448/0x740 fs/gfs2/aops.c:625 folio_invalidate mm/truncate.c:126 [inline] truncate_cleanup_folio+0x203/0x300 mm/truncate.c:146 truncate_inode_pages_range+0x2e5/0x10e0 mm/truncate.c:326 gfs2_evict_inode+0x442/0x13c0 fs/gfs2/super.c:1527 evict+0x4e8/0x9a0 fs/inode.c:796 __dentry_kill+0x20d/0x630 fs/dcache.c:625 dput+0x19f/0x2b0 fs/dcache.c:867 __fput+0x5ba/0xa50 fs/file_table.c:458 task_work_run+0x24f/0x310 kernel/task_work.c:239 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:329 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcd7597ff19 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:00007ffe4b9fc848 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 000000000001a27b RCX: 00007fcd7597ff19 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fcd75b47ba0 R08: 0000000000000001 R09: 00007ffe4b9fcb2f R10: 00007fcd757ff030 R11: 0000000000000246 R12: 000000000001a9a5 R13: 00007fcd75b45fa0 R14: 0000000000000032 R15: ffffffffffffffff Allocated by task 5326: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160 gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_data+0x1f5/0x5f0 fs/gfs2/trans.c:209 gfs2_trans_add_databufs+0x15e/0x1c0 fs/gfs2/aops.c:57 gfs2_iomap_put_folio+0x1b3/0x340 fs/gfs2/bmap.c:991 iomap_write_iter fs/iomap/buffered-io.c:986 [inline] iomap_file_buffered_write+0xb98/0x11c0 fs/iomap/buffered-io.c:1039 gfs2_file_buffered_write+0x4b8/0x840 fs/gfs2/file.c:1060 gfs2_file_write_iter+0x915/0xff0 fs/gfs2/file.c:1164 new_sync_write fs/read_write.c:586 [inline] vfs_write+0xaeb/0xd30 fs/read_write.c:679 ksys_write+0x18f/0x2b0 fs/read_write.c:731 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 Freed by task 30: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2338 [inline] slab_free mm/slub.c:4598 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4700 trans_drain fs/gfs2/log.c:1020 [inline] gfs2_log_flush+0x19ec/0x2610 fs/gfs2/log.c:1160 gfs2_write_inode+0x20e/0x3c0 fs/gfs2/super.c:457 write_inode fs/fs-writeback.c:1525 [inline] __writeback_single_inode+0x708/0x10d0 fs/fs-writeback.c:1745 writeback_sb_inodes+0x820/0x1360 fs/fs-writeback.c:1976 __writeback_inodes_wb+0x11b/0x260 fs/fs-writeback.c:2047 wb_writeback+0x427/0xb80 fs/fs-writeback.c:2158 wb_check_start_all fs/fs-writeback.c:2284 [inline] wb_do_writeback fs/fs-writeback.c:2310 [inline] wb_workfn+0x973/0x1080 fs/fs-writeback.c:2343 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 The buggy address belongs to the object at ffff888043326e70 which belongs to the cache gfs2_bufdata of size 80 The buggy address is located 24 bytes inside of freed 80-byte region [ffff888043326e70, ffff888043326ec0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x43326 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801f807140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000240024 00000001f5000000 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 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5326, tgid 5325 (syz.0.0), ts 108116934670, free_ts 108114125897 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 alloc_slab_page+0x6a/0x110 mm/slub.c:2408 allocate_slab+0x5a/0x2b0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3815 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4160 gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_data+0x1f5/0x5f0 fs/gfs2/trans.c:209 gfs2_trans_add_databufs+0x15e/0x1c0 fs/gfs2/aops.c:57 gfs2_iomap_put_folio+0x1b3/0x340 fs/gfs2/bmap.c:991 iomap_write_iter fs/iomap/buffered-io.c:986 [inline] iomap_file_buffered_write+0xb98/0x11c0 fs/iomap/buffered-io.c:1039 gfs2_file_buffered_write+0x4b8/0x840 fs/gfs2/file.c:1060 gfs2_file_write_iter+0x915/0xff0 fs/gfs2/file.c:1164 new_sync_write fs/read_write.c:586 [inline] vfs_write+0xaeb/0xd30 fs/read_write.c:679 page last free pid 5326 tgid 5325 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2657 __slab_free+0x2c2/0x380 mm/slub.c:4509 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] __kmalloc_cache_noprof+0x1d9/0x390 mm/slub.c:4309 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] gfs2_open_common+0xb4/0x340 fs/gfs2/file.c:639 do_dentry_open+0xbe1/0x1b70 fs/open.c:945 gfs2_create_inode+0x183e/0x1ba0 fs/gfs2/inode.c:814 gfs2_atomic_open+0xe5/0x230 fs/gfs2/inode.c:1316 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:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_creat fs/open.c:1495 [inline] __se_sys_creat fs/open.c:1489 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1489 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 Memory state around the buggy address: ffff888043326d80: fc fc fa fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888043326e00: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb >ffff888043326e80: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb ^ ffff888043326f00: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb ffff888043326f80: fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================