github.com/google/syzkaller@v0.0.0-20240517125934-c0f1611a36d6/pkg/report/testdata/linux/guilty/28 (about)

     1  FILE: net/strparser/strparser.c
     2  
     3  ==================================================================
     4  BUG: KASAN: use-after-free in constant_test_bit arch/x86/include/asm/bitops.h:325 [inline]
     5  BUG: KASAN: use-after-free in work_is_static_object+0x39/0x40 kernel/workqueue.c:443
     6  Read of size 8 at addr ffff8801beca5788 by task syz-executor2/12922
     7  
     8  CPU: 0 PID: 12922 Comm: syz-executor2 Not tainted 4.15.0-rc5+ #178
     9  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
    10  Call Trace:
    11   __dump_stack lib/dump_stack.c:17 [inline]
    12   dump_stack+0x194/0x257 lib/dump_stack.c:53
    13   print_address_description+0x73/0x250 mm/kasan/report.c:252
    14   kasan_report_error mm/kasan/report.c:351 [inline]
    15   kasan_report+0x25b/0x340 mm/kasan/report.c:409
    16   __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430
    17   constant_test_bit arch/x86/include/asm/bitops.h:325 [inline]
    18   work_is_static_object+0x39/0x40 kernel/workqueue.c:443
    19   debug_object_activate+0x36f/0x730 lib/debugobjects.c:470
    20   debug_work_activate kernel/workqueue.c:492 [inline]
    21   __queue_work+0x163/0x1230 kernel/workqueue.c:1381
    22   queue_work_on+0x16a/0x1c0 kernel/workqueue.c:1487
    23   queue_work include/linux/workqueue.h:488 [inline]
    24   strp_check_rcv+0x25/0x30 net/strparser/strparser.c:552
    25   kcm_attach net/kcm/kcmsock.c:1439 [inline]
    26   kcm_attach_ioctl net/kcm/kcmsock.c:1460 [inline]
    27   kcm_ioctl+0x82f/0x1690 net/kcm/kcmsock.c:1665
    28   sock_do_ioctl+0x65/0xb0 net/socket.c:956
    29   sock_ioctl+0x2c2/0x440 net/socket.c:1053
    30   vfs_ioctl fs/ioctl.c:46 [inline]
    31   do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
    32   SYSC_ioctl fs/ioctl.c:701 [inline]
    33   SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
    34   entry_SYSCALL_64_fastpath+0x23/0x9a
    35  RIP: 0033:0x452ac9
    36  RSP: 002b:00007f1bbd860c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000010
    37  RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000452ac9
    38  RDX: 0000000020954ff8 RSI: 00000000000089e0 RDI: 0000000000000017
    39  RBP: 000000000000057b R08: 0000000000000000 R09: 0000000000000000
    40  R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f6428
    41  R13: 00000000ffffffff R14: 00007f1bbd8616d4 R15: 0000000000000000
    42  
    43  Allocated by task 12922:
    44   save_stack+0x43/0xd0 mm/kasan/kasan.c:447
    45   set_track mm/kasan/kasan.c:459 [inline]
    46   kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551
    47   kasan_slab_alloc+0x12/0x20 mm/kasan/kasan.c:489
    48   kmem_cache_alloc+0x12e/0x760 mm/slab.c:3544
    49   kmem_cache_zalloc include/linux/slab.h:678 [inline]
    50   kcm_attach net/kcm/kcmsock.c:1394 [inline]
    51   kcm_attach_ioctl net/kcm/kcmsock.c:1460 [inline]
    52   kcm_ioctl+0x2d2/0x1690 net/kcm/kcmsock.c:1665
    53   sock_do_ioctl+0x65/0xb0 net/socket.c:956
    54   sock_ioctl+0x2c2/0x440 net/socket.c:1053
    55   vfs_ioctl fs/ioctl.c:46 [inline]
    56   do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
    57   SYSC_ioctl fs/ioctl.c:701 [inline]
    58   SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
    59   entry_SYSCALL_64_fastpath+0x23/0x9a
    60  
    61  Freed by task 12929:
    62   save_stack+0x43/0xd0 mm/kasan/kasan.c:447
    63   set_track mm/kasan/kasan.c:459 [inline]
    64   kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524
    65   __cache_free mm/slab.c:3488 [inline]
    66   kmem_cache_free+0x83/0x2a0 mm/slab.c:3746
    67   kcm_unattach+0xe53/0x1510 net/kcm/kcmsock.c:1563
    68   kcm_unattach_ioctl net/kcm/kcmsock.c:1608 [inline]
    69   kcm_ioctl+0xe54/0x1690 net/kcm/kcmsock.c:1675
    70   sock_do_ioctl+0x65/0xb0 net/socket.c:956
    71   sock_ioctl+0x2c2/0x440 net/socket.c:1053
    72   vfs_ioctl fs/ioctl.c:46 [inline]
    73   do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:686
    74   SYSC_ioctl fs/ioctl.c:701 [inline]
    75   SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692
    76   entry_SYSCALL_64_fastpath+0x23/0x9a
    77  
    78  The buggy address belongs to the object at ffff8801beca56c0
    79   which belongs to the cache kcm_psock_cache of size 544
    80  The buggy address is located 200 bytes inside of
    81   544-byte region [ffff8801beca56c0, ffff8801beca58e0)
    82  The buggy address belongs to the page:
    83  page:000000005180a80a count:1 mapcount:0 mapping:0000000058aa9a5c index:0x0 compound_mapcount: 0
    84  flags: 0x2fffc0000008100(slab|head)
    85  raw: 02fffc0000008100 ffff8801beca40c0 0000000000000000 000000010000000b
    86  raw: ffff8801d31e8a48 ffff8801d31e8a48 ffff8801d3f6a380 0000000000000000
    87  page dumped because: kasan: bad access detected
    88  
    89  Memory state around the buggy address:
    90   ffff8801beca5680: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
    91   ffff8801beca5700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
    92  ffff8801beca5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
    93                        ^
    94   ffff8801beca5800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
    95   ffff8801beca5880: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
    96  ==================================================================