syz.0.0 (5329) used greatest stack depth: 12888 bytes left loop0: detected capacity change from 0 to 32768 gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" gfs2: fsid=syz:syz: Now mounting FS (format 1801)... gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents in 0ms gfs2: fsid=syz:syz.0: first mount done, others may mount loop0: detected capacity change from 32768 to 0 syz.0.0: attempt to access beyond end of device loop0: rw=1, sector=2972, nr_sectors = 144 limit=0 gfs2: fsid=syz:syz.0: Error 10 writing to journal, jid=0 ================================================================== 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+0x391/0x850 fs/gfs2/aops.c:625 Read of size 8 at addr ffff8880503a41d8 by task syz.0.0/5329 CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #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:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 list_empty include/linux/list.h:373 [inline] gfs2_discard fs/gfs2/aops.c:587 [inline] gfs2_invalidate_folio+0x391/0x850 fs/gfs2/aops.c:625 folio_invalidate mm/truncate.c:141 [inline] truncate_cleanup_folio+0x11a/0x450 mm/truncate.c:161 truncate_inode_pages_range+0x2da/0xfc0 mm/truncate.c:342 gfs2_evict_inode+0x3c0/0x12a0 fs/gfs2/super.c:1508 evict+0x4e8/0x9b0 fs/inode.c:725 gfs2_evict_inodes fs/gfs2/ops_fstype.c:1756 [inline] gfs2_kill_sb+0x237/0x350 fs/gfs2/ops_fstype.c:1782 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2571d7e719 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:00007f2572ab5038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f2571f35f80 RCX: 00007f2571d7e719 RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f2571df132e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f2571f35f80 R15: 00007fff63d7e128 Allocated by task 5329: 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:247 [inline] slab_post_alloc_hook mm/slub.c:4085 [inline] slab_alloc_node mm/slub.c:4134 [inline] kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4141 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+0xed/0x250 fs/gfs2/bmap.c:991 iomap_write_iter fs/iomap/buffered-io.c:986 [inline] iomap_file_buffered_write+0x8e8/0xe50 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:590 [inline] vfs_write+0xaeb/0xd30 fs/read_write.c:683 ksys_write+0x183/0x2b0 fs/read_write.c:736 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 5329: 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:579 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:230 [inline] slab_free_hook mm/slub.c:2342 [inline] slab_free mm/slub.c:4579 [inline] kmem_cache_free+0x1a2/0x420 mm/slub.c:4681 trans_drain fs/gfs2/log.c:1020 [inline] gfs2_log_flush+0x19ec/0x2610 fs/gfs2/log.c:1160 gfs2_kill_sb+0x5b/0x350 fs/gfs2/ops_fstype.c:1775 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 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:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880503a41c0 which belongs to the cache gfs2_bufdata of size 80 The buggy address is located 24 bytes inside of freed 80-byte region [ffff8880503a41c0, ffff8880503a4210) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x503a4 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801f470000 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 5329, tgid 5328 (syz.0.0), ts 73201716357, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1545 [inline] get_page_from_freelist+0x303f/0x3190 mm/page_alloc.c:3457 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x120 mm/slub.c:2412 allocate_slab+0x5a/0x2f0 mm/slub.c:2578 new_slab mm/slub.c:2631 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818 __slab_alloc+0x58/0xa0 mm/slub.c:3908 __slab_alloc_node mm/slub.c:3961 [inline] slab_alloc_node mm/slub.c:4122 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4141 gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline] gfs2_trans_add_meta+0x36f/0xd10 fs/gfs2/trans.c:251 do_gfs2_set_flags fs/gfs2/file.c:264 [inline] gfs2_fileattr_set+0x787/0xa20 fs/gfs2/file.c:310 vfs_fileattr_set+0x8ff/0xd50 fs/ioctl.c:697 ioctl_setflags fs/ioctl.c:729 [inline] do_vfs_ioctl+0x207a/0x2e40 fs/ioctl.c:870 __do_sys_ioctl fs/ioctl.c:905 [inline] __se_sys_ioctl+0x81/0x170 fs/ioctl.c:893 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 page_owner free stack trace missing Memory state around the buggy address: ffff8880503a4080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb ffff8880503a4100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb >ffff8880503a4180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb ^ ffff8880503a4200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb ffff8880503a4280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc ==================================================================