================================================================== BUG: KASAN: use-after-free in __hlist_del include/linux/list.h:884 [inline] BUG: KASAN: use-after-free in hlist_del_init_rcu include/linux/rculist.h:184 [inline] BUG: KASAN: use-after-free in rxrpc_destroy_local+0x2ad/0x2f0 net/rxrpc/local_object.c:389 Write of size 8 at addr ffff88804622e820 by task krxrpcio/7001/7232 CPU: 0 PID: 7232 Comm: krxrpcio/7001 Not tainted 6.1.0-next-20221215-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:306 [inline] print_report+0x15e/0x45d mm/kasan/report.c:417 kasan_report+0xc0/0xf0 mm/kasan/report.c:517 __hlist_del include/linux/list.h:884 [inline] hlist_del_init_rcu include/linux/rculist.h:184 [inline] rxrpc_destroy_local+0x2ad/0x2f0 net/rxrpc/local_object.c:389 rxrpc_io_thread+0xd89/0x1140 net/rxrpc/io_thread.c:492 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Allocated by task 5103: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x82/0x90 mm/kasan/common.c:325 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1e4/0x430 mm/slub.c:3476 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags include/linux/audit.h:320 [inline] getname fs/namei.c:218 [inline] __do_sys_unlink fs/namei.c:4368 [inline] __se_sys_unlink fs/namei.c:4366 [inline] __x64_sys_unlink+0xb5/0x110 fs/namei.c:4366 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 5103: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:518 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] kmem_cache_free+0xee/0x5c0 mm/slub.c:3809 putname fs/namei.c:271 [inline] putname+0x102/0x140 fs/namei.c:257 do_unlinkat+0x123/0x640 fs/namei.c:4343 __do_sys_unlink fs/namei.c:4368 [inline] __se_sys_unlink fs/namei.c:4366 [inline] __x64_sys_unlink+0xca/0x110 fs/namei.c:4366 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88804622e600 which belongs to the cache names_cache of size 4096 The buggy address is located 544 bytes inside of 4096-byte region [ffff88804622e600, ffff88804622f600) The buggy address belongs to the physical page: page:ffffea0001188a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x46228 head:ffffea0001188a00 order:3 compound_mapcount:0 subpages_mapcount:0 compound_pincount:0 anon flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff8880125ed640 0000000000000000 0000000000000001 raw: 0000000000000000 0000000000070007 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 31481, tgid 31481 (syz-executor.0), ts 3062864639860, free_ts 3061598062433 prep_new_page mm/page_alloc.c:2531 [inline] get_page_from_freelist+0x119e/0x2a80 mm/page_alloc.c:4283 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5549 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2285 alloc_slab_page mm/slub.c:1851 [inline] allocate_slab+0x25f/0x350 mm/slub.c:1998 new_slab mm/slub.c:2051 [inline] ___slab_alloc+0xa91/0x1400 mm/slub.c:3193 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3292 __slab_alloc_node mm/slub.c:3345 [inline] slab_alloc_node mm/slub.c:3442 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x379/0x430 mm/slub.c:3476 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags+0x9e/0xe0 include/linux/audit.h:320 getname fs/namei.c:218 [inline] __do_sys_symlinkat fs/namei.c:4447 [inline] __se_sys_symlinkat fs/namei.c:4444 [inline] __x64_sys_symlinkat+0x7b/0xc0 fs/namei.c:4444 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1446 [inline] free_pcp_prepare+0x4d0/0x9e0 mm/page_alloc.c:1496 free_unref_page_prepare mm/page_alloc.c:3369 [inline] free_unref_page+0x1d/0x490 mm/page_alloc.c:3464 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x192/0x220 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x66/0x90 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:761 [inline] slab_alloc_node mm/slub.c:3452 [inline] slab_alloc mm/slub.c:3460 [inline] __kmem_cache_alloc_lru mm/slub.c:3467 [inline] kmem_cache_alloc+0x1e4/0x430 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] jbd2_alloc_handle include/linux/jbd2.h:1596 [inline] new_handle fs/jbd2/transaction.c:476 [inline] jbd2__journal_start+0x18a/0x6b0 fs/jbd2/transaction.c:503 __ext4_journal_start_sb+0x6e9/0x860 fs/ext4/ext4_jbd2.c:111 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_dirty_inode+0xa5/0x130 fs/ext4/inode.c:6107 __mark_inode_dirty+0x247/0x11e0 fs/fs-writeback.c:2419 mark_inode_dirty include/linux/fs.h:2462 [inline] generic_write_end+0x354/0x440 fs/buffer.c:2184 ext4_da_write_end+0x1f5/0xa30 fs/ext4/inode.c:3175 generic_perform_write+0x316/0x570 mm/filemap.c:3783 ext4_buffered_write_iter+0x15b/0x460 fs/ext4/file.c:285 ext4_file_write_iter+0x8bf/0x1710 fs/ext4/file.c:700 call_write_iter include/linux/fs.h:2186 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0xa45/0xe40 fs/read_write.c:584 Memory state around the buggy address: ffff88804622e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804622e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88804622e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804622e880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804622e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================