===================================================== BUG: KMSAN: uninit-value in stack_trace_consume_entry+0x14a/0x300 kernel/stacktrace.c:86 stack_trace_consume_entry+0x14a/0x300 kernel/stacktrace.c:86 arch_stack_walk+0x2f9/0x3c0 arch/x86/kernel/stacktrace.c:27 stack_trace_save+0x117/0x1a0 kernel/stacktrace.c:122 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline] kmsan_internal_chain_origin+0xac/0x120 mm/kmsan/core.c:252 kmsan_internal_memmove_metadata+0x201/0x350 mm/kmsan/core.c:163 __msan_memcpy+0x65/0x90 mm/kmsan/instrumentation.c:145 pdu_write_u net/9p/protocol.c:66 [inline] p9pdu_vwritef+0x42dd/0x5100 net/9p/protocol.c:439 p9_client_prepare_req+0xe64/0x16d0 net/9p/client.c:703 p9_client_rpc+0x28b/0x1460 net/9p/client.c:734 p9_client_write+0x722/0xfa0 net/9p/client.c:1667 v9fs_fid_xattr_set+0x3a6/0x520 fs/9p/xattr.c:130 v9fs_xattr_set fs/9p/xattr.c:100 [inline] v9fs_xattr_handler_set+0x1b4/0x220 fs/9p/xattr.c:159 __vfs_setxattr+0x910/0x960 fs/xattr.c:180 __vfs_setxattr_noperm+0x382/0xe80 fs/xattr.c:214 __vfs_setxattr_locked+0x629/0x690 fs/xattr.c:275 vfs_setxattr+0x440/0x7b0 fs/xattr.c:301 setxattr+0x42e/0x7c0 fs/xattr.c:575 path_setxattr+0x2f4/0x520 fs/xattr.c:595 __do_sys_setxattr fs/xattr.c:611 [inline] __se_sys_setxattr fs/xattr.c:607 [inline] __ia32_sys_setxattr+0x15b/0x1c0 fs/xattr.c:607 do_syscall_32_irqs_on arch/x86/entry/common.c:113 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:179 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:204 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:247 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Uninit was stored to memory at: stack_trace_save+0x17f/0x1a0 kernel/stacktrace.c:116 kmsan_save_stack_with_flags mm/kmsan/core.c:80 [inline] kmsan_internal_chain_origin+0xac/0x120 mm/kmsan/core.c:252 kmsan_internal_memmove_metadata+0x201/0x350 mm/kmsan/core.c:163 __msan_memcpy+0x65/0x90 mm/kmsan/instrumentation.c:145 pdu_write_u net/9p/protocol.c:66 [inline] p9pdu_vwritef+0x42dd/0x5100 net/9p/protocol.c:439 p9_client_prepare_req+0xe64/0x16d0 net/9p/client.c:703 p9_client_rpc+0x28b/0x1460 net/9p/client.c:734 p9_client_write+0x722/0xfa0 net/9p/client.c:1667 v9fs_fid_xattr_set+0x3a6/0x520 fs/9p/xattr.c:130 v9fs_xattr_set fs/9p/xattr.c:100 [inline] v9fs_xattr_handler_set+0x1b4/0x220 fs/9p/xattr.c:159 __vfs_setxattr+0x910/0x960 fs/xattr.c:180 __vfs_setxattr_noperm+0x382/0xe80 fs/xattr.c:214 __vfs_setxattr_locked+0x629/0x690 fs/xattr.c:275 vfs_setxattr+0x440/0x7b0 fs/xattr.c:301 setxattr+0x42e/0x7c0 fs/xattr.c:575 path_setxattr+0x2f4/0x520 fs/xattr.c:595 __do_sys_setxattr fs/xattr.c:611 [inline] __se_sys_setxattr fs/xattr.c:607 [inline] __ia32_sys_setxattr+0x15b/0x1c0 fs/xattr.c:607 do_syscall_32_irqs_on arch/x86/entry/common.c:113 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:179 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:204 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:247 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c Uninit was created at: slab_post_alloc_hook mm/slab.h:754 [inline] slab_alloc_node mm/slub.c:3231 [inline] slab_alloc mm/slub.c:3239 [inline] kmem_cache_alloc_trace+0xaa1/0x1120 mm/slub.c:3270 kmalloc include/linux/slab.h:581 [inline] p9_fid_create+0x7d/0x470 net/9p/client.c:892 p9_client_walk+0x15f/0xe50 net/9p/client.c:1180 clone_fid fs/9p/fid.h:21 [inline] v9fs_fid_xattr_set+0x244/0x520 fs/9p/xattr.c:118 v9fs_xattr_set fs/9p/xattr.c:100 [inline] v9fs_xattr_handler_set+0x1b4/0x220 fs/9p/xattr.c:159 __vfs_setxattr+0x910/0x960 fs/xattr.c:180 __vfs_setxattr_noperm+0x382/0xe80 fs/xattr.c:214 __vfs_setxattr_locked+0x629/0x690 fs/xattr.c:275 vfs_setxattr+0x440/0x7b0 fs/xattr.c:301 setxattr+0x42e/0x7c0 fs/xattr.c:575 path_setxattr+0x2f4/0x520 fs/xattr.c:595 __do_sys_setxattr fs/xattr.c:611 [inline] __se_sys_setxattr fs/xattr.c:607 [inline] __ia32_sys_setxattr+0x15b/0x1c0 fs/xattr.c:607 do_syscall_32_irqs_on arch/x86/entry/common.c:113 [inline] __do_fast_syscall_32+0x96/0xf0 arch/x86/entry/common.c:179 do_fast_syscall_32+0x34/0x70 arch/x86/entry/common.c:204 do_SYSENTER_32+0x1b/0x20 arch/x86/entry/common.c:247 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c CPU: 0 PID: 29171 Comm: syz-executor.1 Tainted: G W 5.18.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================