gfs2: fsid=syz:syz: error -17 adding sysfs files ================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: use-after-free in atomic_dec include/linux/atomic/atomic-instrumented.h:257 [inline] BUG: KASAN: use-after-free in gfs2_qd_dispose fs/gfs2/quota.c:137 [inline] BUG: KASAN: use-after-free in gfs2_qd_shrink_scan+0x63d/0x860 fs/gfs2/quota.c:175 Write of size 4 at addr ffff888051744a70 by task syz-executor.4/3864 CPU: 1 PID: 3864 Comm: syz-executor.4 Not tainted 6.1.92-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15f/0x4f0 mm/kasan/report.c:395 kasan_report+0x136/0x160 mm/kasan/report.c:495 kasan_check_range+0x27f/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:102 [inline] atomic_dec include/linux/atomic/atomic-instrumented.h:257 [inline] gfs2_qd_dispose fs/gfs2/quota.c:137 [inline] gfs2_qd_shrink_scan+0x63d/0x860 fs/gfs2/quota.c:175 do_shrink_slab+0x597/0xed0 mm/vmscan.c:846 shrink_slab+0x237/0x8b0 mm/vmscan.c:1006 drop_slab_node mm/vmscan.c:1041 [inline] drop_slab+0x163/0x290 mm/vmscan.c:1051 drop_caches_sysctl_handler+0xb3/0x160 fs/drop_caches.c:66 proc_sys_call_handler+0x541/0x8a0 fs/proc/proc_sysctl.c:604 do_iter_write+0x6e6/0xc50 fs/read_write.c:861 iter_file_splice_write+0x830/0xfc0 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0xe3/0x1c0 fs/splice.c:950 splice_direct_to_actor+0x4c7/0xc30 fs/splice.c:896 do_splice_direct+0x2a5/0x3e0 fs/splice.c:1002 do_sendfile+0x61c/0xff0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1317 [inline] __se_sys_sendfile64+0xfc/0x1e0 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f0a13c7cf69 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0a149270c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f0a13db3f80 RCX: 00007f0a13c7cf69 RDX: 0000000020002080 RSI: 0000000000000005 RDI: 0000000000000006 RBP: 00007f0a13cda6fe R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000023b R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f0a13db3f80 R15: 00007ffd4050f568 Allocated by task 3761: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:692 [inline] init_sbd fs/gfs2/ops_fstype.c:77 [inline] gfs2_fill_super+0x15a/0x26e0 fs/gfs2/ops_fstype.c:1149 get_tree_bdev+0x3fe/0x620 fs/super.c:1355 gfs2_get_tree+0x50/0x210 fs/gfs2/ops_fstype.c:1330 vfs_get_tree+0x88/0x270 fs/super.c:1562 do_new_mount+0x2ba/0xb40 fs/namespace.c:3051 do_mount fs/namespace.c:3394 [inline] __do_sys_mount fs/namespace.c:3602 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3579 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Freed by task 3580: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x25c/0x3c0 mm/slub.c:3674 generic_shutdown_super+0x130/0x340 fs/super.c:501 kill_block_super+0x7a/0xe0 fs/super.c:1459 deactivate_locked_super+0xa0/0x110 fs/super.c:332 cleanup_mnt+0x490/0x520 fs/namespace.c:1186 task_work_run+0x246/0x300 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline] syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff888051744000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 2672 bytes inside of 8192-byte region [ffff888051744000, ffff888051746000) The buggy address belongs to the physical page: page:ffffea000145d000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x51740 head:ffffea000145d000 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000122 ffff888012442280 raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x152a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 3777, tgid 3776 (syz-executor.4), ts 108263489787, free_ts 29169440360 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x18d/0x1b0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x31a1/0x3320 mm/page_alloc.c:4279 __alloc_pages+0x28d/0x770 mm/page_alloc.c:5547 alloc_slab_page+0x6a/0x150 mm/slub.c:1794 allocate_slab mm/slub.c:1939 [inline] new_slab+0x84/0x2d0 mm/slub.c:1992 ___slab_alloc+0xc20/0x1270 mm/slub.c:3180 __slab_alloc mm/slub.c:3279 [inline] slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x19f/0x260 mm/slub.c:3437 __do_kmalloc_node mm/slab_common.c:954 [inline] __kmalloc+0xa1/0x230 mm/slab_common.c:968 kmalloc include/linux/slab.h:561 [inline] get_mem_for_virtual_node fs/reiserfs/fix_node.c:2285 [inline] fix_nodes+0x69aa/0x8c70 fs/reiserfs/fix_node.c:2625 reiserfs_paste_into_item+0x65d/0x880 fs/reiserfs/stree.c:2130 reiserfs_get_block+0x2259/0x5150 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x544/0x1a30 fs/buffer.c:1991 reiserfs_write_begin+0x249/0x510 fs/reiserfs/inode.c:2775 generic_perform_write+0x2fc/0x5e0 mm/filemap.c:3817 __generic_file_write_iter+0x176/0x400 mm/filemap.c:3945 generic_file_write_iter+0xab/0x310 mm/filemap.c:3977 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1440 [inline] free_pcp_prepare mm/page_alloc.c:1490 [inline] free_unref_page_prepare+0xf63/0x1120 mm/page_alloc.c:3358 free_unref_page+0x33/0x3e0 mm/page_alloc.c:3453 free_contig_range+0x9a/0x150 mm/page_alloc.c:9507 destroy_args+0xfe/0x997 mm/debug_vm_pgtable.c:1031 debug_vm_pgtable+0x416/0x46b mm/debug_vm_pgtable.c:1354 do_one_initcall+0x265/0x8f0 init/main.c:1299 do_initcall_level+0x157/0x207 init/main.c:1372 do_initcalls+0x49/0x86 init/main.c:1388 kernel_init_freeable+0x45c/0x60f init/main.c:1627 kernel_init+0x19/0x290 init/main.c:1515 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Memory state around the buggy address: ffff888051744900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888051744980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888051744a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888051744a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888051744b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================