syz.0.0: attempt to access beyond end of device loop0: rw=1, sector=2972, nr_sectors = 18 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 ffff888053c0e1d8 by task syz.0.0/5311 CPU: 0 UID: 0 PID: 5311 Comm: syz.0.0 Not tainted 6.13.0-rc1-syzkaller-00316-gb5f217084ab3 #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+0x391/0x850 fs/gfs2/aops.c:625 folio_invalidate mm/truncate.c:126 [inline] truncate_cleanup_folio+0x11a/0x320 mm/truncate.c:146 truncate_inode_pages_range+0x2da/0xfc0 mm/truncate.c:326 gfs2_evict_inode+0x442/0x13c0 fs/gfs2/super.c:1527 evict+0x4e8/0x9a0 fs/inode.c:796 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 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 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 RIP: 0033:0x7fb01fd7fed9 Code: Unable to access opcode bytes at 0x7fb01fd7feaf. RSP: 002b:00007ffea5a10848 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb01fd7fed9 RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000003 R08: 00007ffea5a1092f R09: 00007fb01ff0a260 R10: 0000000000000001 R11: 0000000000000246 R12: 00007fb01ff0af68 R13: 00007fb01ff0a260 R14: 0000000000000003 R15: 00007ffea5a108f0 Allocated by task 5312: 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_unstuffer_folio fs/gfs2/bmap.c:81 [inline] __gfs2_unstuff_inode fs/gfs2/bmap.c:119 [inline] gfs2_unstuff_dinode+0x1050/0x15e0 fs/gfs2/bmap.c:166 gfs2_iomap_begin_write fs/gfs2/bmap.c:1053 [inline] gfs2_iomap_begin+0xa46/0x1390 fs/gfs2/bmap.c:1129 iomap_iter+0x697/0xf60 fs/iomap/iter.c:90 iomap_file_buffered_write+0x2ce/0xe50 fs/iomap/buffered-io.c:1038 gfs2_file_buffered_write+0x4b8/0x840 fs/gfs2/file.c:1060 gfs2_file_write_iter+0x915/0xff0 fs/gfs2/file.c:1164 iter_file_splice_write+0xbfa/0x1510 fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x11b/0x220 fs/splice.c:1164 splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x289/0x3e0 fs/splice.c:1233 vfs_copy_file_range+0xd1f/0x1510 fs/read_write.c:1620 __do_sys_copy_file_range fs/read_write.c:1670 [inline] __se_sys_copy_file_range+0x3fa/0x600 fs/read_write.c:1637 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 5311: 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_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 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0xa2f/0x28e0 kernel/exit.c:938 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 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 The buggy address belongs to the object at ffff888053c0e1c0 which belongs to the cache gfs2_bufdata of size 80 The buggy address is located 24 bytes inside of freed 80-byte region [ffff888053c0e1c0, ffff888053c0e210) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x53c0e flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff888033840140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080240024 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 5312, tgid 5311 (syz.0.0), ts 67373398195, free_ts 0 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:2265 alloc_slab_page+0x6a/0x140 mm/slub.c:2408 allocate_slab+0x5a/0x2f0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xcd1/0x14b0 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_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:696 ioctl_setflags fs/ioctl.c:728 [inline] do_vfs_ioctl+0x2083/0x2e40 fs/ioctl.c:869 __do_sys_ioctl fs/ioctl.c:904 [inline] __se_sys_ioctl+0x80/0x170 fs/ioctl.c:892 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: ffff888053c0e080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb ffff888053c0e100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb >ffff888053c0e180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb ^ ffff888053c0e200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb ffff888053c0e280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc ==================================================================