Title | Replies (including bot) | Last reply |
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KASAN: use-after-free Read in tty_open | 2 (5) | 2020/04/25 02:18 |
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Title | Replies (including bot) | Last reply |
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KASAN: use-after-free Read in tty_open | 2 (5) | 2020/04/25 02:18 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-4.14 | KASAN: use-after-free Read in tty_open | C | done | 5 | 1669d | 1772d | 1/1 | fixed on 2020/04/13 10:52 | |
linux-4.19 | KASAN: use-after-free Read in tty_open | C | done | 2 | 1666d | 1772d | 1/1 | fixed on 2020/04/17 06:51 |
================================================================== BUG: KASAN: use-after-free in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] BUG: KASAN: use-after-free in tty_port_kopened include/linux/tty.h:673 [inline] BUG: KASAN: use-after-free in tty_open_by_driver drivers/tty/tty_io.c:1966 [inline] BUG: KASAN: use-after-free in tty_open+0x6f8/0xbb0 drivers/tty/tty_io.c:2035 Read of size 8 at addr ffff888094827200 by task syz-executor028/7270 CPU: 1 PID: 7270 Comm: syz-executor028 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0xd4/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192 __kasan_check_read+0x11/0x20 mm/kasan/common.c:95 test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] tty_port_kopened include/linux/tty.h:673 [inline] tty_open_by_driver drivers/tty/tty_io.c:1966 [inline] tty_open+0x6f8/0xbb0 drivers/tty/tty_io.c:2035 chrdev_open+0x245/0x6b0 fs/char_dev.c:414 do_dentry_open+0x4e6/0x1380 fs/open.c:797 vfs_open+0xa0/0xd0 fs/open.c:914 do_last fs/namei.c:3420 [inline] path_openat+0x10df/0x4500 fs/namei.c:3537 do_filp_open+0x1a1/0x280 fs/namei.c:3567 do_sys_open+0x3fe/0x5d0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1110 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x405bc1 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 a4 18 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f4c82a59830 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00000000006dcc28 RCX: 0000000000405bc1 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00007f4c82a59860 RBP: 00000000006dcc20 R08: 0000000000000000 R09: 000000000000000d R10: 0000000000000064 R11: 0000000000000293 R12: 00000000006dcc2c R13: 00007ffd46915f6f R14: 00007f4c82a5a9c0 R15: 0000000000000000 Allocated by task 9185: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] __kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:486 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:527 kmem_cache_alloc_trace+0x158/0x790 mm/slab.c:3551 kmalloc include/linux/slab.h:556 [inline] kzalloc include/linux/slab.h:670 [inline] vc_allocate drivers/tty/vt/vt.c:1085 [inline] vc_allocate+0x1fc/0x760 drivers/tty/vt/vt.c:1066 con_install+0x52/0x410 drivers/tty/vt/vt.c:3229 tty_driver_install_tty drivers/tty/tty_io.c:1228 [inline] tty_init_dev drivers/tty/tty_io.c:1341 [inline] tty_init_dev+0xf9/0x470 drivers/tty/tty_io.c:1318 tty_open_by_driver drivers/tty/tty_io.c:1987 [inline] tty_open+0x4a5/0xbb0 drivers/tty/tty_io.c:2035 chrdev_open+0x245/0x6b0 fs/char_dev.c:414 do_dentry_open+0x4e6/0x1380 fs/open.c:797 vfs_open+0xa0/0xd0 fs/open.c:914 do_last fs/namei.c:3420 [inline] path_openat+0x10df/0x4500 fs/namei.c:3537 do_filp_open+0x1a1/0x280 fs/namei.c:3567 do_sys_open+0x3fe/0x5d0 fs/open.c:1097 __do_sys_open fs/open.c:1115 [inline] __se_sys_open fs/open.c:1110 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1110 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 7272: save_stack+0x23/0x90 mm/kasan/common.c:72 set_track mm/kasan/common.c:80 [inline] kasan_set_free_info mm/kasan/common.c:335 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:474 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483 __cache_free mm/slab.c:3426 [inline] kfree+0x10a/0x2c0 mm/slab.c:3757 vt_disallocate_all+0x2bd/0x3e0 drivers/tty/vt/vt_ioctl.c:323 vt_ioctl+0xc38/0x26d0 drivers/tty/vt/vt_ioctl.c:816 tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660 vfs_ioctl fs/ioctl.c:47 [inline] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732 ksys_ioctl+0xab/0xd0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888094827000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 512 bytes inside of 2048-byte region [ffff888094827000, ffff888094827800) The buggy address belongs to the page: page:ffffea00025209c0 refcount:1 mapcount:0 mapping:ffff8880aa400e00 index:0x0 raw: 00fffe0000000200 ffffea00028ea288 ffffea00028a5208 ffff8880aa400e00 raw: 0000000000000000 ffff888094827000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888094827100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888094827180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888094827200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888094827280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888094827300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/12/15 09:11 | upstream | 07c4b9e9f71a | eef6e580 | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | |||
2019/12/14 15:43 | upstream | e31736d9fae8 | eef6e580 | .config | console log | report | syz | C | ci-upstream-kasan-gce-selinux-root | |||
2019/12/04 04:17 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | |||
2019/12/03 22:19 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | |||
2019/12/03 21:20 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | syz | C | ci-upstream-kasan-gce-selinux-root | |||
2019/12/04 00:07 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | syz | C | ci-upstream-kasan-gce-386 | |||
2019/12/26 04:47 | linux-next | 7ddd09fc4b74 | be5c2c81 | .config | console log | report | syz | C | ci-upstream-linux-next-kasan-gce-root | |||
2020/03/24 22:22 | linux-next | 770fbb32d34e | 68660b21 | .config | console log | report | ci-upstream-linux-next-kasan-gce-root |