===================================================== BUG: KMSAN: uninit-value in p9_client_rpc+0x1067/0x13d0 net/9p/client.c:801 p9_client_rpc+0x1067/0x13d0 net/9p/client.c:801 p9_client_version+0x1d3/0x9e0 net/9p/client.c:945 p9_client_create+0x1401/0x16d0 net/9p/client.c:1055 v9fs_session_init+0x2b1/0x2cd0 fs/9p/v9fs.c:406 v9fs_mount+0x134/0x1300 fs/9p/vfs_super.c:126 legacy_get_tree+0x163/0x2e0 fs/fs_context.c:592 vfs_get_tree+0xd8/0x5e0 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x3d5d/0x5bb0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount+0x921/0xa10 fs/namespace.c:3433 __ia32_sys_mount+0x157/0x1b0 fs/namespace.c:3433 do_syscall_32_irqs_on arch/x86/entry/common.c:84 [inline] __do_fast_syscall_32+0x132/0x1b0 arch/x86/entry/common.c:149 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:179 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:222 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Local variable ----ecode@p9_check_errors created at: p9_check_errors+0x69/0xba0 net/9p/client.c:504 p9_client_rpc+0xdd4/0x13d0 net/9p/client.c:799 ===================================================== Kernel panic - not syncing: panic_on_kmsan set ... CPU: 1 PID: 10381 Comm: syz-executor.2 Tainted: G B 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x24c/0x2e0 lib/dump_stack.c:120 panic+0x4c6/0xea7 kernel/panic.c:231 kmsan_report+0x2fa/0x300 mm/kmsan/report.c:179 __msan_warning+0xd7/0x150 mm/kmsan/instrumentation.c:205 p9_client_rpc+0x1067/0x13d0 net/9p/client.c:801 p9_client_version+0x1d3/0x9e0 net/9p/client.c:945 p9_client_create+0x1401/0x16d0 net/9p/client.c:1055 v9fs_session_init+0x2b1/0x2cd0 fs/9p/v9fs.c:406 v9fs_mount+0x134/0x1300 fs/9p/vfs_super.c:126 legacy_get_tree+0x163/0x2e0 fs/fs_context.c:592 vfs_get_tree+0xd8/0x5e0 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x3d5d/0x5bb0 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount+0x921/0xa10 fs/namespace.c:3433 __ia32_sys_mount+0x157/0x1b0 fs/namespace.c:3433 do_syscall_32_irqs_on arch/x86/entry/common.c:84 [inline] __do_fast_syscall_32+0x132/0x1b0 arch/x86/entry/common.c:149 do_fast_syscall_32+0x77/0xd0 arch/x86/entry/common.c:179 do_SYSENTER_32+0x73/0x90 arch/x86/entry/common.c:222 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f4d549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f55475fc EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000040 RDX: 0000000020000140 RSI: 0000000000000000 RDI: 0000000020007400 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: 03 74 c0 01 add 0x1(%rax,%rax,8),%esi 4: 10 05 03 74 b8 01 adc %al,0x1b87403(%rip) # 0x1b8740d a: 10 06 adc %al,(%rsi) c: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 10: 10 07 adc %al,(%rdi) 12: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi 16: 10 08 adc %cl,(%rax) 18: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1c: 00 00 add %al,(%rax) 1e: 00 00 add %al,(%rax) 20: 00 51 52 add %dl,0x52(%rcx) 23: 55 push %rbp 24: 89 e5 mov %esp,%ebp 26: 0f 34 sysenter 28: cd 80 int $0x80 * 2a: 5d pop %rbp <-- trapping instruction 2b: 5a pop %rdx 2c: 59 pop %rcx 2d: c3 retq 2e: 90 nop 2f: 90 nop 30: 90 nop 31: 90 nop 32: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 39: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi