UBSAN: invalid-load in param_get_bool

Status: auto-closed as invalid on 2021/03/30 16:34
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+438cc6c21c384f9efa5e@syzkaller.appspotmail.com
First crash: 2068d, last: 2057d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
UBSAN: invalid-load in param_get_bool 1 (2) 2020/12/21 09:07

Sample crash report:
================================================================================
UBSAN: invalid-load in kernel/params.c:302:33
load of value 255 is not a valid value for type '_Bool'
CPU: 3 PID: 9901 Comm: syz-fuzzer Not tainted 5.10.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 ubsan_epilogue+0xb/0x5a lib/ubsan.c:148
 __ubsan_handle_load_invalid_value.cold+0x62/0x6c lib/ubsan.c:427
 param_get_bool.cold+0x14/0x19 kernel/params.c:302
 param_attr_show+0x14a/0x220 kernel/params.c:549
 module_attr_show+0x48/0x70 kernel/params.c:882
 sysfs_kf_seq_show+0x1f8/0x400 fs/sysfs/file.c:61
 seq_read_iter+0x4d3/0x1220 fs/seq_file.c:227
 seq_read+0x3dd/0x5b0 fs/seq_file.c:159
 kernfs_fop_read+0xe9/0x590 fs/kernfs/file.c:251
 vfs_read+0x1b5/0x570 fs/read_write.c:494
 ksys_read+0x12d/0x250 fs/read_write.c:634
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4ad4a0
Code: 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 49 c7 c2 00 00 00 00 49 c7 c0 00 00 00 00 49 c7 c1 00 00 00 00 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
RSP: 002b:000000c000063678 EFLAGS: 00000212 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 000000c00001e500 RCX: 00000000004ad4a0
RDX: 0000000000001200 RSI: 000000c000395300 RDI: 0000000000000003
RBP: 000000c0000636c8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000212 R12: ffffffffffffffff
R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000005
================================================================================

Crashes (129280):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/12/27 12:55 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 12:52 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 12:49 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 12:47 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 12:43 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 12:39 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:32 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 12:30 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:28 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 12:26 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:24 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:21 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:17 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:09 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:04 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:02 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:00 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 11:58 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 11:56 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 11:51 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 11:45 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 11:43 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 11:41 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 11:38 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 11:34 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 11:32 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 11:30 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream
2020/12/27 11:28 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 11:25 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 11:23 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/27 11:21 upstream f838f8d2b694 821e0b09 .config console log report ci-upstream-kasan-gce-root
2020/12/17 16:02 upstream accefff5b547 04201c06 .config console log report ci-upstream-kasan-gce-root
2020/12/16 16:22 upstream 5e60366d56c6 f213e07e .config console log report ci-upstream-kasan-gce-root
2020/12/27 12:45 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 12:41 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 12:37 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 12:35 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 12:19 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 12:15 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 12:13 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 12:11 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 12:06 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 11:54 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 11:49 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
2020/12/27 11:47 upstream f838f8d2b694 821e0b09 .config console log report ci-qemu-upstream-386
* Struck through repros no longer work on HEAD.