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KASAN: use-after-free Read in sock_wfree

Status: closed as invalid on 2022/11/15 17:18
Subsystems: intel-wired-lan
[Documentation on labels]
First crash: 614d, last: 611d
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-use-after-free Read in sock_wfree (2) intel-wired-lan C 4 91d 100d 26/26 fixed on 2024/03/27 19:12
upstream KASAN: slab-use-after-free Read in sock_wfree net virt 1 174d 174d 0/26 closed as invalid on 2024/01/08 14:45

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in list_empty include/linux/list.h:292 [inline]
BUG: KASAN: use-after-free in waitqueue_active include/linux/wait.h:129 [inline]
BUG: KASAN: use-after-free in sock_def_write_space_wfree net/core/sock.c:3261 [inline]
BUG: KASAN: use-after-free in sock_wfree+0x910/0x940 net/core/sock.c:2361
Read of size 8 at addr ffff88802636e080 by task ksoftirqd/3/33

CPU: 3 PID: 33 Comm: ksoftirqd/3 Not tainted 6.0.0-rc1-syzkaller-00368-gf31c32efd57c #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:317 [inline]
 print_report.cold+0x2ba/0x719 mm/kasan/report.c:433
 kasan_report+0xb1/0x1e0 mm/kasan/report.c:495
 list_empty include/linux/list.h:292 [inline]
 waitqueue_active include/linux/wait.h:129 [inline]
 sock_def_write_space_wfree net/core/sock.c:3261 [inline]
 sock_wfree+0x910/0x940 net/core/sock.c:2361
 skb_release_head_state+0x9f/0x2a0 net/core/skbuff.c:739
 skb_release_all net/core/skbuff.c:750 [inline]
 napi_consume_skb net/core/skbuff.c:1008 [inline]
 napi_consume_skb+0x10c/0x280 net/core/skbuff.c:986
 e1000_unmap_and_free_tx_resource+0x144/0x200 drivers/net/ethernet/intel/e1000/e1000_main.c:1970
 e1000_clean_tx_irq drivers/net/ethernet/intel/e1000/e1000_main.c:3860 [inline]
 e1000_clean+0x4b2/0x1c40 drivers/net/ethernet/intel/e1000/e1000_main.c:3801
 __napi_poll+0xb3/0x6d0 net/core/dev.c:6511
 napi_poll net/core/dev.c:6578 [inline]
 net_rx_action+0x9c1/0xd90 net/core/dev.c:6689
 __do_softirq+0x1d3/0x9c6 kernel/softirq.c:571
 run_ksoftirqd kernel/softirq.c:934 [inline]
 run_ksoftirqd+0x2d/0x60 kernel/softirq.c:926
 smpboot_thread_fn+0x645/0x9c0 kernel/smpboot.c:164
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>

Allocated by task 7857:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:437 [inline]
 __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:470
 kasan_slab_alloc include/linux/kasan.h:224 [inline]
 slab_post_alloc_hook mm/slab.h:727 [inline]
 slab_alloc_node mm/slub.c:3243 [inline]
 slab_alloc mm/slub.c:3251 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3258 [inline]
 kmem_cache_alloc_lru+0x255/0x720 mm/slub.c:3275
 alloc_inode_sb include/linux/fs.h:3103 [inline]
 sock_alloc_inode+0x23/0x1d0 net/socket.c:304
 alloc_inode+0x61/0x230 fs/inode.c:260
 new_inode_pseudo+0x13/0x80 fs/inode.c:1019
 sock_alloc+0x3c/0x260 net/socket.c:627
 __sock_create+0xb9/0x790 net/socket.c:1479
 sock_create net/socket.c:1566 [inline]
 __sys_socket_create net/socket.c:1603 [inline]
 __sys_socket_create net/socket.c:1588 [inline]
 __sys_socket+0x12f/0x240 net/socket.c:1636
 __do_sys_socket net/socket.c:1649 [inline]
 __se_sys_socket net/socket.c:1647 [inline]
 __ia32_sys_socket+0x6f/0xb0 net/socket.c:1647
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0x65/0xf0 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Freed by task 3772:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 kasan_set_track+0x21/0x30 mm/kasan/common.c:45
 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370
 ____kasan_slab_free mm/kasan/common.c:367 [inline]
 ____kasan_slab_free+0x166/0x1c0 mm/kasan/common.c:329
 kasan_slab_free include/linux/kasan.h:200 [inline]
 slab_free_hook mm/slub.c:1754 [inline]
 slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1780
 slab_free mm/slub.c:3534 [inline]
 kmem_cache_free+0xeb/0x5b0 mm/slub.c:3551
 i_callback+0x3f/0x70 fs/inode.c:249
 rcu_do_batch kernel/rcu/tree.c:2245 [inline]
 rcu_core+0x7b5/0x1890 kernel/rcu/tree.c:2505
 __do_softirq+0x1d3/0x9c6 kernel/softirq.c:571

Last potentially related work creation:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
 call_rcu+0x99/0x790 kernel/rcu/tree.c:2793
 destroy_inode+0x129/0x1b0 fs/inode.c:315
 iput_final fs/inode.c:1748 [inline]
 iput.part.0+0x55d/0x810 fs/inode.c:1774
 iput+0x58/0x70 fs/inode.c:1764
 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401
 __dentry_kill+0x3c0/0x640 fs/dcache.c:607
 dentry_kill fs/dcache.c:733 [inline]
 dput+0x806/0xdb0 fs/dcache.c:913
 __fput+0x39c/0x9d0 fs/file_table.c:333
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
 exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Second to last potentially related work creation:
 kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xbe/0xd0 mm/kasan/generic.c:348
 call_rcu+0x99/0x790 kernel/rcu/tree.c:2793
 destroy_inode+0x129/0x1b0 fs/inode.c:315
 iput_final fs/inode.c:1748 [inline]
 iput.part.0+0x55d/0x810 fs/inode.c:1774
 iput+0x58/0x70 fs/inode.c:1764
 dentry_unlink_inode+0x2b1/0x460 fs/dcache.c:401
 __dentry_kill+0x3c0/0x640 fs/dcache.c:607
 dentry_kill fs/dcache.c:733 [inline]
 dput+0x806/0xdb0 fs/dcache.c:913
 __fput+0x39c/0x9d0 fs/file_table.c:333
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:169 [inline]
 exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 __do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

The buggy address belongs to the object at ffff88802636e000
 which belongs to the cache sock_inode_cache of size 1408
The buggy address is located 128 bytes inside of
 1408-byte region [ffff88802636e000, ffff88802636e580)

The buggy address belongs to the physical page:
page:ffffea000098da00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26368
head:ffffea000098da00 order:3 compound_mapcount:0 compound_pincount:0
memcg:ffff888029f31701
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 0000000000000000 dead000000000001 ffff8880122b43c0
raw: 0000000000000000 0000000080150015 00000001ffffffff ffff888029f31701
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 3347, tgid 3347 (dhcpcd), ts 140078690920, free_ts 0
 prep_new_page mm/page_alloc.c:2532 [inline]
 get_page_from_freelist+0x109b/0x2ce0 mm/page_alloc.c:4283
 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5515
 alloc_pages+0x1a6/0x270 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:1824 [inline]
 allocate_slab+0x27e/0x3d0 mm/slub.c:1969
 new_slab mm/slub.c:2029 [inline]
 ___slab_alloc+0x7f1/0xe10 mm/slub.c:3031
 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3118
 slab_alloc_node mm/slub.c:3209 [inline]
 slab_alloc mm/slub.c:3251 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3258 [inline]
 kmem_cache_alloc_lru+0x528/0x720 mm/slub.c:3275
 alloc_inode_sb include/linux/fs.h:3103 [inline]
 sock_alloc_inode+0x23/0x1d0 net/socket.c:304
 alloc_inode+0x61/0x230 fs/inode.c:260
 new_inode_pseudo+0x13/0x80 fs/inode.c:1019
 sock_alloc+0x3c/0x260 net/socket.c:627
 __sock_create+0xb9/0x790 net/socket.c:1479
 sock_create net/socket.c:1566 [inline]
 __sys_socket_create net/socket.c:1603 [inline]
 __sys_socket_create net/socket.c:1588 [inline]
 __sys_socket+0x12f/0x240 net/socket.c:1636
 __do_sys_socket net/socket.c:1649 [inline]
 __se_sys_socket net/socket.c:1647 [inline]
 __x64_sys_socket+0x6f/0xb0 net/socket.c:1647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802636df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802636e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802636e080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88802636e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802636e180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/08/20 18:33 upstream f31c32efd57c 26a13b38 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in sock_wfree
2022/08/23 23:51 net-next-old 6c2c782fa013 cea8b0f7 .config console log report info ci-upstream-net-kasan-gce KASAN: use-after-free Read in sock_wfree
* Struck through repros no longer work on HEAD.