Title | Replies (including bot) | Last reply |
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KASAN: slab-out-of-bounds Read in vcs_scr_readw | 1 (3) | 2020/01/03 09:48 |
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KASAN: slab-out-of-bounds Read in vcs_scr_readw | 1 (3) | 2020/01/03 09:48 |
Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
linux-4.19 | KASAN: slab-out-of-bounds Read in vcs_scr_readw | C | inconclusive | 80 | 1724d | 1733d | 1/1 | fixed on 2020/09/18 07:23 |
================================================================== BUG: KASAN: slab-out-of-bounds in vcs_scr_readw+0xc2/0xd0 drivers/tty/vt/vt.c:4665 Read of size 2 at addr ffff8880a87f92c0 by task syz-executor318/9700 CPU: 0 PID: 9700 Comm: syz-executor318 Not tainted 5.4.0-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:638 __asan_report_load2_noabort+0x14/0x20 mm/kasan/generic_report.c:133 vcs_scr_readw+0xc2/0xd0 drivers/tty/vt/vt.c:4665 vcs_write+0x646/0xcf0 drivers/tty/vt/vc_screen.c:545 __vfs_write+0x8a/0x110 fs/read_write.c:494 vfs_write+0x268/0x5d0 fs/read_write.c:558 ksys_write+0x14f/0x290 fs/read_write.c:611 __do_sys_write fs/read_write.c:623 [inline] __se_sys_write fs/read_write.c:620 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:620 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x443e49 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fffb2c50aa8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443e49 RDX: 0000000000001010 RSI: 0000000020006480 RDI: 0000000000000003 RBP: 00000000006cf018 R08: 0000000000000000 R09: 00000000004002e0 R10: 000000000000000f R11: 0000000000000246 R12: 0000000000401b50 R13: 0000000000401be0 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 9678: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] __kasan_kmalloc mm/kasan/common.c:512 [inline] __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:485 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:526 __do_kmalloc mm/slab.c:3656 [inline] __kmalloc+0x163/0x770 mm/slab.c:3665 kmalloc include/linux/slab.h:561 [inline] kzalloc include/linux/slab.h:670 [inline] vc_allocate drivers/tty/vt/vt.c:1098 [inline] vc_allocate+0x3fc/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+0xf7/0x460 drivers/tty/tty_io.c:1318 tty_open_by_driver drivers/tty/tty_io.c:1985 [inline] tty_open+0x4a5/0xbb0 drivers/tty/tty_io.c:2033 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:3412 [inline] path_openat+0x10e4/0x4710 fs/namei.c:3529 do_filp_open+0x1a1/0x280 fs/namei.c:3559 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 9401: save_stack+0x23/0x90 mm/kasan/common.c:71 set_track mm/kasan/common.c:79 [inline] kasan_set_free_info mm/kasan/common.c:334 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/common.c:473 kasan_slab_free+0xe/0x10 mm/kasan/common.c:482 __cache_free mm/slab.c:3426 [inline] kfree+0x10a/0x2c0 mm/slab.c:3757 tomoyo_init_log+0x15b5/0x2070 security/tomoyo/audit.c:293 tomoyo_supervisor+0x33f/0xef0 security/tomoyo/common.c:2095 tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] tomoyo_env_perm+0x18e/0x210 security/tomoyo/environ.c:63 tomoyo_environ security/tomoyo/domain.c:670 [inline] tomoyo_find_next_domain+0x1354/0x1f6c security/tomoyo/domain.c:876 tomoyo_bprm_check_security security/tomoyo/tomoyo.c:107 [inline] tomoyo_bprm_check_security+0x124/0x1a0 security/tomoyo/tomoyo.c:97 security_bprm_check+0x63/0xb0 security/security.c:784 search_binary_handler+0x71/0x570 fs/exec.c:1645 exec_binprm fs/exec.c:1701 [inline] __do_execve_file.isra.0+0x1329/0x22b0 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1955 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 ffff8880a87f8000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 4800 bytes inside of 8192-byte region [ffff8880a87f8000, ffff8880a87fa000) The buggy address belongs to the page: page:ffffea0002a1fe00 refcount:1 mapcount:0 mapping:ffff8880aa4021c0 index:0x0 compound_mapcount: 0 raw: 00fffe0000010200 ffffea0002502a08 ffffea00024f5608 ffff8880aa4021c0 raw: 0000000000000000 ffff8880a87f8000 0000000100000001 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880a87f9180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880a87f9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880a87f9280: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff8880a87f9300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880a87f9380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2019/12/04 06:37 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | syz | C | ci-upstream-kasan-gce-selinux-root | |||
2019/12/04 06:03 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | |||
2019/12/04 04:55 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | syz | C | ci-upstream-kasan-gce-root | |||
2019/12/03 09:08 | upstream | 596cf45cbf6e | ab342da3 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2019/12/03 08:02 | upstream | 596cf45cbf6e | ab342da3 | .config | console log | report | syz | C | ci-upstream-kasan-gce | |||
2019/12/03 01:09 | upstream | 596cf45cbf6e | ab342da3 | .config | console log | report | syz | C | ci-upstream-kasan-gce-selinux-root | |||
2019/12/03 10:23 | upstream | 596cf45cbf6e | ab342da3 | .config | console log | report | syz | C | ci-upstream-kasan-gce-386 | |||
2019/12/03 09:16 | upstream | 596cf45cbf6e | ab342da3 | .config | console log | report | syz | C | ci-upstream-kasan-gce-386 | |||
2019/12/04 04:47 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | ci-upstream-kasan-gce-selinux-root | |||||
2019/12/04 04:23 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2019/12/04 00:59 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2019/12/04 00:47 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | ci-upstream-kasan-gce | |||||
2019/12/03 23:29 | upstream | 76bb8b05960c | ae13a849 | .config | console log | report | ci-upstream-kasan-gce-selinux-root | |||||
2019/12/03 14:33 | upstream | 76bb8b05960c | ab342da3 | .config | console log | report | ci-upstream-kasan-gce-selinux-root | |||||
2019/12/03 07:19 | upstream | 596cf45cbf6e | ab342da3 | .config | console log | report | ci-upstream-kasan-gce-root | |||||
2019/12/03 00:20 | upstream | 596cf45cbf6e | ab342da3 | .config | console log | report | ci-upstream-kasan-gce-selinux-root |