===================================================== BUG: KMSAN: uninit-value in check_pointer lib/vsprintf.c:705 [inline] BUG: KMSAN: uninit-value in string+0x3d2/0x700 lib/vsprintf.c:717 check_pointer lib/vsprintf.c:705 [inline] string+0x3d2/0x700 lib/vsprintf.c:717 vsnprintf+0x224f/0x36a0 lib/vsprintf.c:2797 seq_vprintf fs/seq_file.c:407 [inline] seq_printf+0x301/0x500 fs/seq_file.c:422 show_cpuinfo+0x321/0x18b0 arch/x86/kernel/cpu/proc.c:68 seq_read_iter+0xab2/0x2160 fs/seq_file.c:230 proc_reg_read_iter+0x385/0x480 fs/proc/inode.c:296 do_iter_readv_writev+0xa7f/0xc70 do_iter_read+0x52c/0x14c0 fs/read_write.c:790 vfs_readv fs/read_write.c:910 [inline] do_readv+0x433/0x800 fs/read_write.c:947 __do_sys_readv fs/read_write.c:1038 [inline] __se_sys_readv fs/read_write.c:1035 [inline] __x64_sys_readv+0xe5/0x120 fs/read_write.c:1035 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae Local variable ----sample.i@event_sched_in created at: perf_log_itrace_start kernel/events/core.c:9043 [inline] event_sched_in+0x13d1/0x33e0 kernel/events/core.c:2557 group_sched_in kernel/events/core.c:2595 [inline] merge_sched_in kernel/events/core.c:3723 [inline] visit_groups_merge+0x2749/0x6040 kernel/events/core.c:3696 ===================================================== Kernel panic - not syncing: panic_on_kmsan set ... CPU: 0 PID: 10647 Comm: syz-executor.1 Tainted: G B 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1ff/0x28e lib/dump_stack.c:106 dump_stack+0x25/0x28 lib/dump_stack.c:113 panic+0x44f/0xdeb kernel/panic.c:232 kmsan_report+0x2ee/0x300 mm/kmsan/report.c:186 __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:208 check_pointer lib/vsprintf.c:705 [inline] string+0x3d2/0x700 lib/vsprintf.c:717 vsnprintf+0x224f/0x36a0 lib/vsprintf.c:2797 seq_vprintf fs/seq_file.c:407 [inline] seq_printf+0x301/0x500 fs/seq_file.c:422 show_cpuinfo+0x321/0x18b0 arch/x86/kernel/cpu/proc.c:68 seq_read_iter+0xab2/0x2160 fs/seq_file.c:230 proc_reg_read_iter+0x385/0x480 fs/proc/inode.c:296 do_iter_readv_writev+0xa7f/0xc70 do_iter_read+0x52c/0x14c0 fs/read_write.c:790 vfs_readv fs/read_write.c:910 [inline] do_readv+0x433/0x800 fs/read_write.c:947 __do_sys_readv fs/read_write.c:1038 [inline] __se_sys_readv fs/read_write.c:1035 [inline] __x64_sys_readv+0xe5/0x120 fs/read_write.c:1035 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x54/0xd0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fda202da8d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fda1d851188 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007fda203def60 RCX: 00007fda202da8d9 RDX: 0000000000000005 RSI: 0000000020000580 RDI: 0000000000000006 RBP: 00007fda20334cb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fda20912b2f R14: 00007fda1d851300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..