KASAN: use-after-free Write in do_con_write
We report the crash: "KASAN: use-after-free Write in do_con_write" This crash was found in v4.17-rc3. Specifically, memory access (write operation) is invalid, and it is detected by KASAN. C repro code: https://kiwi.cs.purdue.edu/static/alexkkid-fuzzer/repro-c4a1f8.c kernel config: https://kiwi.cs.purdue.edu/static/alexkkid-fuzzer/kernel-config-v4.17-rc3 Crash log: == BUG: KASAN: use-after-free in do_con_write.part.20+0x1a14/0x1b70 drivers/tty/vt/vt.c:2397 Write of size 2 at addr 88139042 by task getty/2803 CPU: 0 PID: 2803 Comm: getty Not tainted 4.17.0-rc3 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xc7/0x138 lib/dump_stack.c:113 print_address_description+0x6a/0x280 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x22f/0x350 mm/kasan/report.c:412 __asan_report_store2_noabort+0x17/0x20 mm/kasan/report.c:436 do_con_write.part.20+0x1a14/0x1b70 drivers/tty/vt/vt.c:2397 do_con_write drivers/tty/vt/vt.c:2790 [inline] con_write+0xb2/0xc0 drivers/tty/vt/vt.c:2786 n_tty_write+0x763/0xea0 drivers/tty/n_tty.c:2331 do_tty_write drivers/tty/tty_io.c:958 [inline] tty_write+0x48c/0x870 drivers/tty/tty_io.c:1042 __vfs_write+0x10d/0x610 fs/read_write.c:485 vfs_write+0x187/0x500 fs/read_write.c:549 ksys_write+0xd4/0x1a0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0xa4/0x460 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ffa6267ac00 RSP: 002b:7ffee1ff7538 EFLAGS: 0246 ORIG_RAX: 0001 RAX: ffda RBX: 00607340 RCX: 7ffa6267ac00 RDX: 0002 RSI: 004059fb RDI: 0001 RBP: 0002 R08: 000a R09: 7ffa62944670 R10: 7ffee1ff7620 R11: 0246 R12: 7ffee1ff8090 R13: 7ffa62d65690 R14: 004059fb R15: The buggy address belongs to the page: page:ea004e40 count:0 mapcount:0 mapping: index:0x0 flags: 0x0() raw: raw: ea004e60 ea004e60 page dumped because: kasan: bad access detected Memory state around the buggy address: 88138f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 88138f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >88139000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ 88139080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 88139100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff == Thanks, Kyungtae Kim
KASAN: use-after-free Write in do_con_write
We report the crash: "KASAN: use-after-free Write in do_con_write" This crash was found in v4.17-rc3. Specifically, memory access (write operation) is invalid, and it is detected by KASAN. C repro code: https://kiwi.cs.purdue.edu/static/alexkkid-fuzzer/repro-c4a1f8.c kernel config: https://kiwi.cs.purdue.edu/static/alexkkid-fuzzer/kernel-config-v4.17-rc3 Crash log: == BUG: KASAN: use-after-free in do_con_write.part.20+0x1a14/0x1b70 drivers/tty/vt/vt.c:2397 Write of size 2 at addr 88139042 by task getty/2803 CPU: 0 PID: 2803 Comm: getty Not tainted 4.17.0-rc3 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xc7/0x138 lib/dump_stack.c:113 print_address_description+0x6a/0x280 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x22f/0x350 mm/kasan/report.c:412 __asan_report_store2_noabort+0x17/0x20 mm/kasan/report.c:436 do_con_write.part.20+0x1a14/0x1b70 drivers/tty/vt/vt.c:2397 do_con_write drivers/tty/vt/vt.c:2790 [inline] con_write+0xb2/0xc0 drivers/tty/vt/vt.c:2786 n_tty_write+0x763/0xea0 drivers/tty/n_tty.c:2331 do_tty_write drivers/tty/tty_io.c:958 [inline] tty_write+0x48c/0x870 drivers/tty/tty_io.c:1042 __vfs_write+0x10d/0x610 fs/read_write.c:485 vfs_write+0x187/0x500 fs/read_write.c:549 ksys_write+0xd4/0x1a0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0xa4/0x460 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ffa6267ac00 RSP: 002b:7ffee1ff7538 EFLAGS: 0246 ORIG_RAX: 0001 RAX: ffda RBX: 00607340 RCX: 7ffa6267ac00 RDX: 0002 RSI: 004059fb RDI: 0001 RBP: 0002 R08: 000a R09: 7ffa62944670 R10: 7ffee1ff7620 R11: 0246 R12: 7ffee1ff8090 R13: 7ffa62d65690 R14: 004059fb R15: The buggy address belongs to the page: page:ea004e40 count:0 mapcount:0 mapping: index:0x0 flags: 0x0() raw: raw: ea004e60 ea004e60 page dumped because: kasan: bad access detected Memory state around the buggy address: 88138f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 88138f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >88139000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ 88139080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 88139100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff == Thanks, Kyungtae Kim
Fwd: KASAN: use-after-free Write in do_con_write
-- Forwarded message -- From: Kyungtae Kim <kt0...@gmail.com> Date: Sat, May 12, 2018 at 9:47 AM Subject: KASAN: use-after-free Write in do_con_write To: gre...@linuxfoundation.org, jsl...@suse.com, linux-kernel@vger.kernel.org Cc: Byoungyoung Lee <lifeasag...@gmail.com>, DaeRyong Jeong <threeear...@gmail.com> We report the crash: "KASAN: use-after-free Write in do_con_write" This crash was found in v4.17-rc3. Specifically, memory access (write operation) is invalid, and it is detected by KASAN. C repro code: https://kiwi.cs.purdue.edu/static/alexkkid-fuzzer/repro-c4a1f8.c kernel config: https://kiwi.cs.purdue.edu/static/alexkkid-fuzzer/kernel-config-v4.17-rc3 Crash log: == BUG: KASAN: use-after-free in do_con_write.part.20+0x1a14/0x1b70 drivers/tty/vt/vt.c:2397 Write of size 2 at addr 88139042 by task getty/2803 CPU: 0 PID: 2803 Comm: getty Not tainted 4.17.0-rc3 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xc7/0x138 lib/dump_stack.c:113 print_address_description+0x6a/0x280 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x22f/0x350 mm/kasan/report.c:412 __asan_report_store2_noabort+0x17/0x20 mm/kasan/report.c:436 do_con_write.part.20+0x1a14/0x1b70 drivers/tty/vt/vt.c:2397 do_con_write drivers/tty/vt/vt.c:2790 [inline] con_write+0xb2/0xc0 drivers/tty/vt/vt.c:2786 n_tty_write+0x763/0xea0 drivers/tty/n_tty.c:2331 do_tty_write drivers/tty/tty_io.c:958 [inline] tty_write+0x48c/0x870 drivers/tty/tty_io.c:1042 __vfs_write+0x10d/0x610 fs/read_write.c:485 vfs_write+0x187/0x500 fs/read_write.c:549 ksys_write+0xd4/0x1a0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0xa4/0x460 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ffa6267ac00 RSP: 002b:7ffee1ff7538 EFLAGS: 0246 ORIG_RAX: 0001 RAX: ffda RBX: 00607340 RCX: 7ffa6267ac00 RDX: 0002 RSI: 004059fb RDI: 0001 RBP: 0002 R08: 000a R09: 7ffa62944670 R10: 7ffee1ff7620 R11: 0246 R12: 7ffee1ff8090 R13: 7ffa62d65690 R14: 004059fb R15: The buggy address belongs to the page: page:ea004e40 count:0 mapcount:0 mapping: index:0x0 flags: 0x0() raw: raw: ea004e60 ea004e60 page dumped because: kasan: bad access detected Memory state around the buggy address: 88138f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 88138f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >88139000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ 88139080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 88139100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff == Thanks, Kyungtae Kim
Fwd: KASAN: use-after-free Write in do_con_write
-- Forwarded message -- From: Kyungtae Kim Date: Sat, May 12, 2018 at 9:47 AM Subject: KASAN: use-after-free Write in do_con_write To: gre...@linuxfoundation.org, jsl...@suse.com, linux-kernel@vger.kernel.org Cc: Byoungyoung Lee , DaeRyong Jeong We report the crash: "KASAN: use-after-free Write in do_con_write" This crash was found in v4.17-rc3. Specifically, memory access (write operation) is invalid, and it is detected by KASAN. C repro code: https://kiwi.cs.purdue.edu/static/alexkkid-fuzzer/repro-c4a1f8.c kernel config: https://kiwi.cs.purdue.edu/static/alexkkid-fuzzer/kernel-config-v4.17-rc3 Crash log: == BUG: KASAN: use-after-free in do_con_write.part.20+0x1a14/0x1b70 drivers/tty/vt/vt.c:2397 Write of size 2 at addr 88139042 by task getty/2803 CPU: 0 PID: 2803 Comm: getty Not tainted 4.17.0-rc3 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xc7/0x138 lib/dump_stack.c:113 print_address_description+0x6a/0x280 mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report+0x22f/0x350 mm/kasan/report.c:412 __asan_report_store2_noabort+0x17/0x20 mm/kasan/report.c:436 do_con_write.part.20+0x1a14/0x1b70 drivers/tty/vt/vt.c:2397 do_con_write drivers/tty/vt/vt.c:2790 [inline] con_write+0xb2/0xc0 drivers/tty/vt/vt.c:2786 n_tty_write+0x763/0xea0 drivers/tty/n_tty.c:2331 do_tty_write drivers/tty/tty_io.c:958 [inline] tty_write+0x48c/0x870 drivers/tty/tty_io.c:1042 __vfs_write+0x10d/0x610 fs/read_write.c:485 vfs_write+0x187/0x500 fs/read_write.c:549 ksys_write+0xd4/0x1a0 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0xa4/0x460 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ffa6267ac00 RSP: 002b:7ffee1ff7538 EFLAGS: 0246 ORIG_RAX: 0001 RAX: ffda RBX: 00607340 RCX: 7ffa6267ac00 RDX: 0002 RSI: 004059fb RDI: 0001 RBP: 0002 R08: 000a R09: 7ffa62944670 R10: 7ffee1ff7620 R11: 0246 R12: 7ffee1ff8090 R13: 7ffa62d65690 R14: 004059fb R15: The buggy address belongs to the page: page:ea004e40 count:0 mapcount:0 mapping: index:0x0 flags: 0x0() raw: raw: ea004e60 ea004e60 page dumped because: kasan: bad access detected Memory state around the buggy address: 88138f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 88138f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >88139000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ 88139080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 88139100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff == Thanks, Kyungtae Kim
