================================================================== BUG: KASAN: double-free or invalid-free in bdev_free_inode+0x57/0x80 fs/block_dev.c:787 CPU: 0 PID: 8490 Comm: syz-executor.2 Not tainted 5.10.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 print_address_description.constprop.0.cold+0x5b/0x2c6 mm/kasan/report.c:230 kasan_report_invalid_free+0x51/0x80 mm/kasan/report.c:355 ____kasan_slab_free+0xcc/0xe0 mm/kasan/common.c:341 kasan_slab_free include/linux/kasan.h:188 [inline] __cache_free mm/slab.c:3424 [inline] kfree+0xed/0x280 mm/slab.c:3760 bdev_free_inode+0x57/0x80 fs/block_dev.c:787 i_callback+0x3f/0x70 fs/inode.c:222 rcu_do_batch kernel/rcu/tree.c:2489 [inline] rcu_core+0x75d/0xf80 kernel/rcu/tree.c:2723 __do_softirq+0x2bc/0xa77 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0xaa/0xd0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu+0x17f/0x200 kernel/softirq.c:420 irq_exit_rcu+0x5/0x20 kernel/softirq.c:432 sysvec_apic_timer_interrupt+0x4d/0x100 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:__schedule+0xa8/0x21b0 kernel/sched/core.c:4969 Code: 4c 63 e8 49 83 fd 07 0f 87 3a 1b 00 00 4a 8d 3c ed c0 a6 0e 8b 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 eb 1a 00 00 4e 03 24 ed c0 a6 0e 8b 49 8d 84 24 28 0a 00 00 RSP: 0018:ffffc90001a27bc0 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff92000344f80 RDX: 1ffffffff161d4d8 RSI: 0000000000000001 RDI: ffffffff8b0ea6c0 RBP: ffffc90001a27c88 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff81792678 R11: 0000000000000000 R12: 0000000000034d00 R13: 0000000000000000 R14: 0000000000034d00 R15: ffff888066cb4200 schedule+0xcf/0x270 kernel/sched/core.c:5157 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x268/0x6a0 kernel/time/hrtimer.c:1878 hrtimer_nanosleep+0x1f9/0x430 kernel/time/hrtimer.c:1931 __do_sys_nanosleep kernel/time/hrtimer.c:1965 [inline] __se_sys_nanosleep kernel/time/hrtimer.c:1952 [inline] __x64_sys_nanosleep+0x1dc/0x260 kernel/time/hrtimer.c:1952 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c611 Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 34 cf fb ff c3 48 83 ec 08 e8 0a 47 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 47 00 00 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007ffeeb0807f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 000000000007b84c RCX: 000000000045c611 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffeeb080800 RBP: 00000000000001f5 R08: 0000000000000000 R09: 0000000002cbd940 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000006 R13: 00007ffeeb080850 R14: 00007ffeeb080860 R15: 000000000007b1c4 Allocated by task 4897: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:401 [inline] ____kasan_kmalloc.constprop.0+0x7f/0xa0 mm/kasan/common.c:429 kasan_kmalloc include/linux/kasan.h:215 [inline] kmem_cache_alloc_trace+0x15f/0x300 mm/slab.c:3554 kmalloc include/linux/slab.h:552 [inline] kernfs_get_open_node fs/kernfs/file.c:571 [inline] kernfs_fop_open+0x884/0xdf0 fs/kernfs/file.c:717 do_dentry_open+0x4b9/0x11b0 fs/open.c:817 do_open fs/namei.c:3252 [inline] path_openat+0x1bdc/0x27a0 fs/namei.c:3369 do_filp_open+0x17e/0x3c0 fs/namei.c:3396 do_sys_openat2+0x16d/0x420 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_open fs/open.c:1196 [inline] __se_sys_open fs/open.c:1192 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1192 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Freed by task 4897: kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38 kasan_set_track+0x1c/0x30 mm/kasan/common.c:46 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:354 ____kasan_slab_free+0xb0/0xe0 mm/kasan/common.c:362 kasan_slab_free include/linux/kasan.h:188 [inline] __cache_free mm/slab.c:3424 [inline] kfree+0xed/0x280 mm/slab.c:3760 kernfs_fop_release+0xe3/0x190 fs/kernfs/file.c:779 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop kernel/entry/common.c:174 [inline] exit_to_user_mode_prepare+0x1f0/0x200 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 The buggy address belongs to the object at ffff8880263a6b00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 0 bytes inside of 128-byte region [ffff8880263a6b00, ffff8880263a6b80) The buggy address belongs to the page: page:000000002cbaaa32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x263a6 flags: 0xfff00000000200(slab) raw: 00fff00000000200 ffffea0000af7f48 ffffea0000570308 ffff888010840400 raw: 0000000000000000 ffff8880263a6000 0000000100000010 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880263a6a00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880263a6a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880263a6b00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880263a6b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880263a6c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================