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BUG: KASAN: double-free or invalid-free in selinux_tun_dev_free_security+0x15/0x20 security/selinux/hooks.c:5023 CPU: 0 PID: 3000 Comm: syzkaller887527 Not tainted 4.13.0-rc5+ #43 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_double_free+0x55/0x80 mm/kasan/report.c:333 kasan_slab_free+0xa3/0xc0 mm/kasan/kasan.c:514 __cache_free mm/slab.c:3503 [inline] kfree+0xca/0x250 mm/slab.c:3820 selinux_tun_dev_free_security+0x15/0x20 security/selinux/hooks.c:5023 security_tun_dev_free_security+0x48/0x80 security/security.c:1512 tun_set_iff drivers/net/tun.c:1884 [inline] __tun_chr_ioctl+0x2ce6/0x3d50 drivers/net/tun.c:2064 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:2309 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x443eb9 RSP: 002b:00007ffc37b9f4f8 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 3ce0bf1bfd9aecc7 RCX: 0000000000443eb9 RDX: 0000000020533000 RSI: 00000000400454ca RDI: 0000000000000018 RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000217 R12: 0000001000003a8d R13: 74656e2f7665642f R14: 0000000000000000 R15: 0000000000000000 Allocated by task 3000: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 kmem_cache_alloc_trace+0x12f/0x740 mm/slab.c:3627 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:666 [inline] selinux_tun_dev_alloc_security+0x49/0x170 security/selinux/hooks.c:5012 security_tun_dev_alloc_security+0x6d/0xa0 security/security.c:1506 tun_set_iff drivers/net/tun.c:1839 [inline] __tun_chr_ioctl+0x1730/0x3d50 drivers/net/tun.c:2064 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:2309 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe Freed by task 3000: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3503 [inline] kfree+0xca/0x250 mm/slab.c:3820 selinux_tun_dev_free_security+0x15/0x20 security/selinux/hooks.c:5023 security_tun_dev_free_security+0x48/0x80 security/security.c:1512 tun_free_netdev+0x13b/0x1b0 drivers/net/tun.c:1563 register_netdevice+0x8d0/0xee0 net/core/dev.c:7605 tun_set_iff drivers/net/tun.c:1859 [inline] __tun_chr_ioctl+0x1caf/0x3d50 drivers/net/tun.c:2064 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:2309 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1520 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe The buggy address belongs to the object at ffff8801dada7dc0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 0 bytes inside of 32-byte region [ffff8801dada7dc0, ffff8801dada7de0) The buggy address belongs to the page: page:ffffea00076b69c0 count:1 mapcount:0 mapping:ffff8801dada7000 index:0xffff8801dada7fc1 flags: 0x200000000000100(slab) raw: 0200000000000100 ffff8801dada7000 ffff8801dada7fc1 000000010000003f raw: ffffea00076b73a0 ffffea0007613fe0 ffff8801dac001c0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801dada7c80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ffff8801dada7d00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff8801dada7d80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ^ ffff8801dada7e00: 00 00 00 00 fc fc fc fc fb fb fb fb fc fc fc fc ffff8801dada7e80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2017/08/21 06:17 | upstream | 7f680d7ec315 | f238fbd4 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/21 01:49 | upstream | 7f680d7ec315 | f238fbd4 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/19 18:38 | upstream | 58d4e450a490 | f238fbd4 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/18 20:14 | upstream | 04d49f3638d0 | 41bbf437 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/17 14:13 | upstream | ac9a40905a61 | 2dfba870 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/17 13:34 | upstream | ac9a40905a61 | 2dfba870 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/17 13:20 | upstream | ac9a40905a61 | 2dfba870 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/17 13:06 | upstream | ac9a40905a61 | 2dfba870 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/17 12:33 | upstream | ac9a40905a61 | 2dfba870 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/17 11:04 | upstream | ac9a40905a61 | 2dfba870 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/08 02:15 | upstream | aae4e7a8bc44 | 77a9ec9b | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2017/08/21 16:48 | linux-next | bb70832dd42b | f238fbd4 | .config | console log | report | syz | C | ci-upstream-next-kasan-gce | |||
2017/08/21 16:18 | linux-next | bb70832dd42b | f238fbd4 | .config | console log | report | syz | C | ci-upstream-next-kasan-gce | |||
2017/08/13 01:18 | linux-next | 91dfed74eabc | 360f0528 | .config | console log | report | syz | C | ci-upstream-next-kasan-gce | |||
2017/08/13 01:01 | linux-next | 91dfed74eabc | 6a0246bf | .config | console log | report | syz | C | skylake-linux-next-kasan-qemu | |||
2017/08/12 12:54 | linux-next | 91dfed74eabc | 360f0528 | .config | console log | report | syz | C | ci-upstream-next-kasan-gce | |||
2017/08/12 07:41 | linux-next | 91dfed74eabc | 360f0528 | .config | console log | report | syz | C | ci-upstream-next-kasan-gce | |||
2017/08/12 06:26 | linux-next | 91dfed74eabc | 360f0528 | .config | console log | report | syz | C | ci-upstream-next-kasan-gce | |||
2017/08/19 03:34 | upstream | 58d4e450a490 | f238fbd4 | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/08/09 05:06 | upstream | bfa738cf3dfa | 7e288c05 | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/08/07 12:10 | upstream | aae4e7a8bc44 | 77a9ec9b | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/08/03 22:58 | upstream | 8d3fe85f07a9 | f5040a63 | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/08/03 00:54 | upstream | 33611ba0fed7 | f5040a63 | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/08/01 14:20 | upstream | bc78d646e708 | 864b7ea2 | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/07/30 17:42 | upstream | 0a07b238e5f4 | fe8ced11 | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/07/29 10:51 | upstream | 0a07b238e5f4 | fe8ced11 | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/07/29 10:50 | upstream | 0a07b238e5f4 | fe8ced11 | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/07/24 06:16 | upstream | a56e88ec05df | eab4e2eb | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/07/24 03:05 | upstream | a56e88ec05df | eab4e2eb | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/07/23 02:19 | upstream | 4b162c530d9c | eab4e2eb | .config | console log | report | ci-upstream-kasan-gce | |||||
2017/08/21 20:08 | linux-next | bb70832dd42b | f238fbd4 | .config | console log | report | ci-upstream-next-kasan-gce | |||||
2017/08/21 00:51 | linux-next | bb70832dd42b | f238fbd4 | .config | console log | report | ci-upstream-next-kasan-gce | |||||
2017/08/20 19:30 | linux-next | bb70832dd42b | f238fbd4 | .config | console log | report | ci-upstream-next-kasan-gce | |||||
2017/08/18 01:32 | linux-next | bb70832dd42b | f238fbd4 | .config | console log | report | ci-upstream-next-kasan-gce | |||||
2017/08/18 00:40 | linux-next | bb70832dd42b | f238fbd4 | .config | console log | report | ci-upstream-next-kasan-gce | |||||
2017/08/17 03:00 | linux-next | 5d51332f20b2 | f93be584 | .config | console log | report | skylake-linux-next-kasan-qemu | |||||
2017/08/16 12:37 | linux-next | 5d51332f20b2 | f93be584 | .config | console log | report | skylake-linux-next-kasan-qemu | |||||
2017/08/14 10:36 | linux-next | 91dfed74eabc | 6a0246bf | .config | console log | report | skylake-linux-next-kasan-qemu |