loop1: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-use-after-free in jfs_readdir+0x1b30/0x4620 fs/jfs/jfs_dtree.c:2887 Read of size 1 at addr ffff888035d75648 by task syz-executor.1/10720 CPU: 0 PID: 10720 Comm: syz-executor.1 Not tainted 6.3.0-rc3-syzkaller-00338-gda8e7da11e4b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:319 [inline] print_report+0x163/0x540 mm/kasan/report.c:430 kasan_report+0x176/0x1b0 mm/kasan/report.c:536 jfs_readdir+0x1b30/0x4620 fs/jfs/jfs_dtree.c:2887 iterate_dir+0x228/0x570 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f6556c8c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f655792b168 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007f6556dabf80 RCX: 00007f6556c8c0f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007f6556ce7b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff5ab2009f R14: 00007f655792b300 R15: 0000000000022000 Allocated by task 10412: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x66/0x70 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 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_lru+0x11f/0x2e0 mm/slub.c:3483 alloc_inode_sb include/linux/fs.h:2686 [inline] ext4_alloc_inode+0x2e/0x5a0 fs/ext4/super.c:1321 alloc_inode fs/inode.c:260 [inline] new_inode_pseudo+0x65/0x1d0 fs/inode.c:1019 new_inode+0x29/0x1d0 fs/inode.c:1047 __ext4_new_inode+0x35a/0x42f0 fs/ext4/ialloc.c:959 ext4_create+0x279/0x550 fs/ext4/namei.c:2808 lookup_open fs/namei.c:3416 [inline] open_last_lookups fs/namei.c:3484 [inline] path_openat+0x13df/0x3170 fs/namei.c:3712 do_filp_open+0x234/0x490 fs/namei.c:3742 do_sys_openat2+0x13f/0x500 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_open fs/open.c:1372 [inline] __se_sys_open fs/open.c:1368 [inline] __x64_sys_open+0x225/0x270 fs/open.c:1368 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491 __call_rcu_common kernel/rcu/tree.c:2622 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2736 do_unlinkat+0x506/0x940 fs/namei.c:4323 __do_sys_unlink fs/namei.c:4364 [inline] __se_sys_unlink fs/namei.c:4362 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4362 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Second to last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491 __call_rcu_common kernel/rcu/tree.c:2622 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:2736 __dentry_kill+0x436/0x650 fs/dcache.c:607 dentry_kill+0xbb/0x290 dput+0x1f3/0x420 fs/dcache.c:913 __fput+0x5e4/0x890 fs/file_table.c:329 task_work_run+0x24a/0x300 kernel/task_work.c:179 exit_task_work include/linux/task_work.h:38 [inline] do_exit+0x68f/0x2290 kernel/exit.c:869 do_group_exit+0x206/0x2c0 kernel/exit.c:1019 get_signal+0x1701/0x17e0 kernel/signal.c:2859 arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888035d75040 which belongs to the cache ext4_inode_cache of size 2440 The buggy address is located 1544 bytes inside of freed 2440-byte region [ffff888035d75040, ffff888035d759c8) The buggy address belongs to the physical page: page:ffffea0000d75c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888035d75040 pfn:0x35d70 head:ffffea0000d75c00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888026f9f301 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 ffff888018ecfdc0 ffffea0001df8610 ffffea0001d59a10 raw: ffff888035d75040 00000000000c000b 00000001ffffffff ffff888026f9f301 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 7097, tgid 7095 (syz-executor.3), ts 237214705191, free_ts 203220025807 prep_new_page mm/page_alloc.c:2553 [inline] get_page_from_freelist+0x3246/0x33c0 mm/page_alloc.c:4326 __alloc_pages+0x255/0x670 mm/page_alloc.c:5592 alloc_slab_page+0x6a/0x160 mm/slub.c:1851 allocate_slab mm/slub.c:1998 [inline] new_slab+0x84/0x2f0 mm/slub.c:2051 ___slab_alloc+0xa85/0x10a0 mm/slub.c:3193 __slab_alloc mm/slub.c:3292 [inline] __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_lru+0x1b9/0x2e0 mm/slub.c:3483 alloc_inode_sb include/linux/fs.h:2686 [inline] ext4_alloc_inode+0x2e/0x5a0 fs/ext4/super.c:1321 alloc_inode fs/inode.c:260 [inline] new_inode_pseudo+0x65/0x1d0 fs/inode.c:1019 new_inode+0x29/0x1d0 fs/inode.c:1047 __ext4_new_inode+0x35a/0x42f0 fs/ext4/ialloc.c:959 ext4_mkdir+0x425/0xce0 fs/ext4/namei.c:2991 vfs_mkdir+0x29d/0x450 fs/namei.c:4038 do_mkdirat+0x264/0x520 fs/namei.c:4061 __do_sys_mkdirat fs/namei.c:4076 [inline] __se_sys_mkdirat fs/namei.c:4074 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4074 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 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:1454 [inline] free_pcp_prepare mm/page_alloc.c:1504 [inline] free_unref_page_prepare+0xe2f/0xe70 mm/page_alloc.c:3388 free_unref_page+0x37/0x3f0 mm/page_alloc.c:3483 discard_slab mm/slub.c:2098 [inline] __unfreeze_partials+0x1b1/0x1f0 mm/slub.c:2637 put_cpu_partial+0x116/0x180 mm/slub.c:2713 qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769 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+0x11f/0x2e0 mm/slub.c:3476 kmem_cache_zalloc include/linux/slab.h:710 [inline] alloc_buffer_head+0x2d/0x2a0 fs/buffer.c:2947 alloc_page_buffers+0x32d/0x950 fs/buffer.c:872 create_empty_buffers+0x3e/0x7e0 fs/buffer.c:1586 __ext4_block_zero_page_range fs/ext4/inode.c:3825 [inline] ext4_block_zero_page_range+0x25b/0xa50 fs/ext4/inode.c:3921 ext4_block_truncate_page fs/ext4/inode.c:3945 [inline] ext4_truncate+0x94c/0x1150 fs/ext4/inode.c:4322 ext4_truncate_failed_write fs/ext4/truncate.h:22 [inline] ext4_handle_inode_extension+0x676/0x8c0 fs/ext4/file.c:377 ext4_dio_write_iter fs/ext4/file.c:604 [inline] ext4_file_write_iter+0x154d/0x1930 fs/ext4/file.c:708 Memory state around the buggy address: ffff888035d75500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888035d75580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888035d75600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888035d75680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888035d75700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================