==================================================================
BUG: KASAN: slab-use-after-free in ntfs_write_bh+0x6b9/0x6e0 fs/ntfs3/fsntfs.c:1401
Read of size 8 at addr ffff888076754000 by task syz-executor.0/9639
CPU: 2 PID: 9639 Comm: syz-executor.0 Not tainted 6.6.0-rc1-syzkaller-00033-g3669558bdf35 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
print_address_description mm/kasan/report.c:364 [inline]
print_report+0xc4/0x620 mm/kasan/report.c:475
kasan_report+0xda/0x110 mm/kasan/report.c:588
ntfs_write_bh+0x6b9/0x6e0 fs/ntfs3/fsntfs.c:1401
mi_write+0xc0/0x1e0 fs/ntfs3/record.c:346
ni_write_inode+0x102c/0x2810 fs/ntfs3/frecord.c:3360
write_inode fs/fs-writeback.c:1456 [inline]
__writeback_single_inode+0xa81/0xe70 fs/fs-writeback.c:1668
writeback_single_inode+0x2af/0x590 fs/fs-writeback.c:1724
sync_inode_metadata+0xa5/0xe0 fs/fs-writeback.c:2786
ntfs_set_state+0x3f0/0x6e0 fs/ntfs3/fsntfs.c:995
ntfs_create_inode+0x317/0x4290 fs/ntfs3/inode.c:1307
ntfs_atomic_open+0x4d2/0x650 fs/ntfs3/namei.c:422
atomic_open fs/namei.c:3358 [inline]
lookup_open.isra.0+0xc44/0x1360 fs/namei.c:3466
open_last_lookups fs/namei.c:3563 [inline]
path_openat+0x931/0x29c0 fs/namei.c:3793
do_filp_open+0x1de/0x430 fs/namei.c:3823
do_sys_openat2+0x176/0x1e0 fs/open.c:1422
do_sys_open fs/open.c:1437 [inline]
__do_compat_sys_open fs/open.c:1488 [inline]
__se_compat_sys_open fs/open.c:1486 [inline]
__ia32_compat_sys_open+0x147/0x1d0 fs/open.c:1486
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
RIP: 0023:0xf7f9c579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f7f975ac EFLAGS: 00000292 ORIG_RAX: 0000000000000005
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000060142
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Allocated by task 812:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0xa2/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1023 [inline]
__kmalloc_node_track_caller+0x61/0x100 mm/slab_common.c:1043
kmalloc_reserve+0xef/0x260 net/core/skbuff.c:581
__alloc_skb+0x12b/0x330 net/core/skbuff.c:650
alloc_skb include/linux/skbuff.h:1286 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x29e/0xc70 drivers/net/netdevsim/dev.c:850
process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Freed by task 812:
kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x15b/0x1b0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1800 [inline]
slab_free_freelist_hook+0x114/0x1e0 mm/slub.c:1826
slab_free mm/slub.c:3809 [inline]
__kmem_cache_free+0xb8/0x2f0 mm/slub.c:3822
skb_kfree_head net/core/skbuff.c:945 [inline]
skb_free_head+0x110/0x1b0 net/core/skbuff.c:957
skb_release_data+0x5ba/0x870 net/core/skbuff.c:987
skb_release_all net/core/skbuff.c:1053 [inline]
__kfree_skb net/core/skbuff.c:1067 [inline]
consume_skb net/core/skbuff.c:1283 [inline]
consume_skb+0xd2/0x170 net/core/skbuff.c:1277
nsim_dev_trap_report drivers/net/netdevsim/dev.c:821 [inline]
nsim_dev_trap_report_work+0x872/0xc70 drivers/net/netdevsim/dev.c:850
process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
The buggy address belongs to the object at ffff888076754000
which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes inside of
freed 4096-byte region [ffff888076754000, ffff888076755000)
The buggy address belongs to the physical page:
page:ffffea0001d9d400 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888076754000 pfn:0x76750
head:ffffea0001d9d400 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4fff00000000840(slab|head|node=1|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 04fff00000000840 ffff888012c43040 ffffea0001450a10 ffffea0001e6be10
raw: ffff888076754000 0000000000040003 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 812, tgid 812 (kworker/3:2), ts 1025149466959, free_ts 1025106705925
set_page_owner include/linux/page_owner.h:31 [inline]
post_alloc_hook+0x2cf/0x340 mm/page_alloc.c:1536
prep_new_page mm/page_alloc.c:1543 [inline]
get_page_from_freelist+0xee0/0x2f20 mm/page_alloc.c:3170
__alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4426
alloc_pages+0x1a9/0x270 mm/mempolicy.c:2298
alloc_slab_page mm/slub.c:1870 [inline]
allocate_slab+0x251/0x380 mm/slub.c:2017
new_slab mm/slub.c:2070 [inline]
___slab_alloc+0x8be/0x1570 mm/slub.c:3223
__slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3322
__slab_alloc_node mm/slub.c:3375 [inline]
slab_alloc_node mm/slub.c:3468 [inline]
__kmem_cache_alloc_node+0x137/0x350 mm/slub.c:3517
__do_kmalloc_node mm/slab_common.c:1022 [inline]
__kmalloc_node_track_caller+0x50/0x100 mm/slab_common.c:1043
kmalloc_reserve+0xef/0x260 net/core/skbuff.c:581
__alloc_skb+0x12b/0x330 net/core/skbuff.c:650
alloc_skb include/linux/skbuff.h:1286 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x29e/0xc70 drivers/net/netdevsim/dev.c:850
process_one_work+0x887/0x15d0 kernel/workqueue.c:2630
process_scheduled_works kernel/workqueue.c:2703 [inline]
worker_thread+0x8bb/0x1290 kernel/workqueue.c:2784
kthread+0x33a/0x430 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
page last free stack trace:
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1136 [inline]
free_unref_page_prepare+0x476/0xa40 mm/page_alloc.c:2312
free_unref_page+0x33/0x3b0 mm/page_alloc.c:2405
__unfreeze_partials+0x21d/0x240 mm/slub.c:2655
qlink_free mm/kasan/quarantine.c:166 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185
kasan_quarantine_reduce+0x18b/0x1d0 mm/kasan/quarantine.c:292
__kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook mm/slab.h:762 [inline]
slab_alloc_node mm/slub.c:3478 [inline]
slab_alloc mm/slub.c:3486 [inline]
__kmem_cache_alloc_lru mm/slub.c:3493 [inline]
kmem_cache_alloc_lru+0x21a/0x630 mm/slub.c:3509
alloc_inode_sb include/linux/fs.h:2909 [inline]
alloc_inode+0xb3/0x220 fs/inode.c:261
new_inode_pseudo fs/inode.c:1004 [inline]
new_inode+0x22/0x260 fs/inode.c:1030
debugfs_get_inode fs/debugfs/inode.c:72 [inline]
__debugfs_create_file+0x11e/0x6a0 fs/debugfs/inode.c:429
kvm_create_vm_debugfs arch/x86/kvm/../../../virt/kvm/kvm_main.c:1107 [inline]
kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1242 [inline]
kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:5089 [inline]
kvm_dev_ioctl+0x16b2/0x1c20 arch/x86/kvm/../../../virt/kvm/kvm_main.c:5131
__do_compat_sys_ioctl+0x2bf/0x330 fs/ioctl.c:972
do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
__do_fast_syscall_32+0x61/0xe0 arch/x86/entry/common.c:178
do_fast_syscall_32+0x33/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x70/0x82
Memory state around the buggy address:
ffff888076753f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888076753f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888076754000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888076754080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888076754100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 10 06 adc %al,(%rsi)
2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi
6: 10 07 adc %al,(%rdi)
8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi
c: 10 08 adc %cl,(%rax)
e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi
1e: 00 51 52 add %dl,0x52(%rcx)
21: 55 push %rbp
22: 89 e5 mov %esp,%ebp
24: 0f 34 sysenter
26: cd 80 int $0x80
* 28: 5d pop %rbp <-- trapping instruction
29: 5a pop %rdx
2a: 59 pop %rcx
2b: c3 ret
2c: 90 nop
2d: 90 nop
2e: 90 nop
2f: 90 nop
30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi
37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi