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charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev CC: Linux Memory Management List TO: "Christian Göttsche" CC: Christian Brauner CC: Arnd Bergmann tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 985bf40edf4343dcb04c33f58b40b4a85c1776d4 commit: 6a7fb6ebe3718ca5f56468b163ff82c65bdf7b7f [3689/8126] fs/xattr: add *at family syscalls :::::: branch date: 2 days ago :::::: commit date: 3 weeks ago config: arm64-randconfig-r071-20240901 (https://download.01.org/0day-ci/archive/20240901/202409010924.1NBtrsYA-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 14.1.0 If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Reported-by: Dan Carpenter | Closes: https://lore.kernel.org/r/202409010924.1NBtrsYA-lkp@intel.com/ smatch warnings: fs/xattr.c:692 __do_sys_setxattrat() warn: comparison of a potentially tagged address (__do_sys_setxattrat, 5, usize) fs/xattr.c:692 __do_sys_setxattrat() warn: comparison of a potentially tagged address (__do_sys_setxattrat, 5, usize) fs/xattr.c:849 __do_sys_getxattrat() warn: comparison of a potentially tagged address (__do_sys_getxattrat, 5, usize) fs/xattr.c:849 __do_sys_getxattrat() warn: comparison of a potentially tagged address (__do_sys_getxattrat, 5, usize) vim +692 fs/xattr.c ^1da177e4c3f41 Linus Torvalds 2005-04-16 679 6a7fb6ebe3718c Christian Göttsche 2024-04-26 680 SYSCALL_DEFINE6(setxattrat, int, dfd, const char __user *, pathname, unsigned int, at_flags, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 681 const char __user *, name, const struct xattr_args __user *, uargs, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 682 size_t, usize) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 683 { 6a7fb6ebe3718c Christian Göttsche 2024-04-26 684 struct xattr_args args = {}; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 685 int error; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 686 6a7fb6ebe3718c Christian Göttsche 2024-04-26 687 BUILD_BUG_ON(sizeof(struct xattr_args) < XATTR_ARGS_SIZE_VER0); 6a7fb6ebe3718c Christian Göttsche 2024-04-26 688 BUILD_BUG_ON(sizeof(struct xattr_args) != XATTR_ARGS_SIZE_LATEST); 6a7fb6ebe3718c Christian Göttsche 2024-04-26 689 6a7fb6ebe3718c Christian Göttsche 2024-04-26 690 if (unlikely(usize < XATTR_ARGS_SIZE_VER0)) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 691 return -EINVAL; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 @692 if (usize > PAGE_SIZE) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 693 return -E2BIG; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 694 6a7fb6ebe3718c Christian Göttsche 2024-04-26 695 error = copy_struct_from_user(&args, sizeof(args), uargs, usize); 6a7fb6ebe3718c Christian Göttsche 2024-04-26 696 if (error) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 697 return error; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 698 6a7fb6ebe3718c Christian Göttsche 2024-04-26 699 return path_setxattrat(dfd, pathname, at_flags, name, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 700 u64_to_user_ptr(args.value), args.size, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 701 args.flags); 6a7fb6ebe3718c Christian Göttsche 2024-04-26 702 } 6a7fb6ebe3718c Christian Göttsche 2024-04-26 703 8cc431165d8fbd Eric Biggers 2014-10-12 704 SYSCALL_DEFINE5(setxattr, const char __user *, pathname, 64fd1de3d82165 Heiko Carstens 2009-01-14 705 const char __user *, name, const void __user *, value, 64fd1de3d82165 Heiko Carstens 2009-01-14 706 size_t, size, int, flags) ^1da177e4c3f41 Linus Torvalds 2005-04-16 707 { 6a7fb6ebe3718c Christian Göttsche 2024-04-26 708 return path_setxattrat(AT_FDCWD, pathname, 0, name, value, size, flags); 18f335aff86913 Dave Hansen 2008-02-15 709 } 8cc431165d8fbd Eric Biggers 2014-10-12 710 8cc431165d8fbd Eric Biggers 2014-10-12 711 SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname, 8cc431165d8fbd Eric Biggers 2014-10-12 712 const char __user *, name, const void __user *, value, 8cc431165d8fbd Eric Biggers 2014-10-12 713 size_t, size, int, flags) 8cc431165d8fbd Eric Biggers 2014-10-12 714 { 6a7fb6ebe3718c Christian Göttsche 2024-04-26 715 return path_setxattrat(AT_FDCWD, pathname, AT_SYMLINK_NOFOLLOW, name, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 716 value, size, flags); ^1da177e4c3f41 Linus Torvalds 2005-04-16 717 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 718 64fd1de3d82165 Heiko Carstens 2009-01-14 719 SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name, 64fd1de3d82165 Heiko Carstens 2009-01-14 720 const void __user *,value, size_t, size, int, flags) ^1da177e4c3f41 Linus Torvalds 2005-04-16 721 { c3a5e3e872f368 David Howells 2024-07-23 722 struct xattr_name kname; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 723 struct kernel_xattr_ctx ctx = { c3a5e3e872f368 David Howells 2024-07-23 724 .cvalue = value, c3a5e3e872f368 David Howells 2024-07-23 725 .kvalue = NULL, c3a5e3e872f368 David Howells 2024-07-23 726 .size = size, c3a5e3e872f368 David Howells 2024-07-23 727 .kname = &kname, c3a5e3e872f368 David Howells 2024-07-23 728 .flags = flags, c3a5e3e872f368 David Howells 2024-07-23 729 }; c3a5e3e872f368 David Howells 2024-07-23 730 int error; ^1da177e4c3f41 Linus Torvalds 2005-04-16 731 c3a5e3e872f368 David Howells 2024-07-23 732 CLASS(fd, f)(fd); 2903ff019b346a Al Viro 2012-08-28 733 if (!f.file) c3a5e3e872f368 David Howells 2024-07-23 734 return -EBADF; c3a5e3e872f368 David Howells 2024-07-23 735 9f45f5bf302daa Al Viro 2014-10-31 736 audit_file(f.file); c3a5e3e872f368 David Howells 2024-07-23 737 error = setxattr_copy(name, &ctx); c3a5e3e872f368 David Howells 2024-07-23 738 if (error) c3a5e3e872f368 David Howells 2024-07-23 739 return error; c3a5e3e872f368 David Howells 2024-07-23 740 6742cee0435323 Miklos Szeredi 2018-07-18 741 error = mnt_want_write_file(f.file); 18f335aff86913 Dave Hansen 2008-02-15 742 if (!error) { c3a5e3e872f368 David Howells 2024-07-23 743 error = do_setxattr(file_mnt_idmap(f.file), c3a5e3e872f368 David Howells 2024-07-23 744 f.file->f_path.dentry, &ctx); 6742cee0435323 Miklos Szeredi 2018-07-18 745 mnt_drop_write_file(f.file); 18f335aff86913 Dave Hansen 2008-02-15 746 } c3a5e3e872f368 David Howells 2024-07-23 747 kvfree(ctx.kvalue); ^1da177e4c3f41 Linus Torvalds 2005-04-16 748 return error; ^1da177e4c3f41 Linus Torvalds 2005-04-16 749 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 750 ^1da177e4c3f41 Linus Torvalds 2005-04-16 751 /* ^1da177e4c3f41 Linus Torvalds 2005-04-16 752 * Extended attribute GET operations ^1da177e4c3f41 Linus Torvalds 2005-04-16 753 */ c975cad9315700 Stefan Roesch 2022-04-24 754 ssize_t 5a6f52d20ce3cd Christian Brauner 2022-10-28 755 do_getxattr(struct mnt_idmap *idmap, struct dentry *d, 53566cca34de34 Christian Göttsche 2024-04-26 756 struct kernel_xattr_ctx *ctx) ^1da177e4c3f41 Linus Torvalds 2005-04-16 757 { ^1da177e4c3f41 Linus Torvalds 2005-04-16 758 ssize_t error; c975cad9315700 Stefan Roesch 2022-04-24 759 char *kname = ctx->kname->name; ^1da177e4c3f41 Linus Torvalds 2005-04-16 760 c975cad9315700 Stefan Roesch 2022-04-24 761 if (ctx->size) { c975cad9315700 Stefan Roesch 2022-04-24 762 if (ctx->size > XATTR_SIZE_MAX) c975cad9315700 Stefan Roesch 2022-04-24 763 ctx->size = XATTR_SIZE_MAX; c975cad9315700 Stefan Roesch 2022-04-24 764 ctx->kvalue = kvzalloc(ctx->size, GFP_KERNEL); c975cad9315700 Stefan Roesch 2022-04-24 765 if (!ctx->kvalue) ^1da177e4c3f41 Linus Torvalds 2005-04-16 766 return -ENOMEM; 779302e67835fe Sasha Levin 2012-07-30 767 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 768 318e66856ddec0 Christian Brauner 2022-09-22 769 if (is_posix_acl_xattr(ctx->kname->name)) 5a6f52d20ce3cd Christian Brauner 2022-10-28 770 error = do_get_acl(idmap, d, kname, ctx->kvalue, ctx->size); 318e66856ddec0 Christian Brauner 2022-09-22 771 else 4609e1f18e19c3 Christian Brauner 2023-01-13 772 error = vfs_getxattr(idmap, d, kname, ctx->kvalue, ctx->size); ^1da177e4c3f41 Linus Torvalds 2005-04-16 773 if (error > 0) { c975cad9315700 Stefan Roesch 2022-04-24 774 if (ctx->size && copy_to_user(ctx->value, ctx->kvalue, error)) ^1da177e4c3f41 Linus Torvalds 2005-04-16 775 error = -EFAULT; c975cad9315700 Stefan Roesch 2022-04-24 776 } else if (error == -ERANGE && ctx->size >= XATTR_SIZE_MAX) { ^1da177e4c3f41 Linus Torvalds 2005-04-16 777 /* The file system tried to returned a value bigger ^1da177e4c3f41 Linus Torvalds 2005-04-16 778 than XATTR_SIZE_MAX bytes. Not possible. */ ^1da177e4c3f41 Linus Torvalds 2005-04-16 779 error = -E2BIG; ^1da177e4c3f41 Linus Torvalds 2005-04-16 780 } 0b2a6f231dcbc7 Richard Weinberger 2016-01-02 781 c975cad9315700 Stefan Roesch 2022-04-24 782 return error; c975cad9315700 Stefan Roesch 2022-04-24 783 } 0b2a6f231dcbc7 Richard Weinberger 2016-01-02 784 c975cad9315700 Stefan Roesch 2022-04-24 785 static ssize_t 5a6f52d20ce3cd Christian Brauner 2022-10-28 786 getxattr(struct mnt_idmap *idmap, struct dentry *d, c975cad9315700 Stefan Roesch 2022-04-24 787 const char __user *name, void __user *value, size_t size) c975cad9315700 Stefan Roesch 2022-04-24 788 { c975cad9315700 Stefan Roesch 2022-04-24 789 ssize_t error; c975cad9315700 Stefan Roesch 2022-04-24 790 struct xattr_name kname; 53566cca34de34 Christian Göttsche 2024-04-26 791 struct kernel_xattr_ctx ctx = { c975cad9315700 Stefan Roesch 2022-04-24 792 .value = value, c975cad9315700 Stefan Roesch 2022-04-24 793 .kvalue = NULL, c975cad9315700 Stefan Roesch 2022-04-24 794 .size = size, c975cad9315700 Stefan Roesch 2022-04-24 795 .kname = &kname, c975cad9315700 Stefan Roesch 2022-04-24 796 .flags = 0, c975cad9315700 Stefan Roesch 2022-04-24 797 }; c975cad9315700 Stefan Roesch 2022-04-24 798 c975cad9315700 Stefan Roesch 2022-04-24 799 error = strncpy_from_user(kname.name, name, sizeof(kname.name)); c975cad9315700 Stefan Roesch 2022-04-24 800 if (error == 0 || error == sizeof(kname.name)) c975cad9315700 Stefan Roesch 2022-04-24 801 error = -ERANGE; c975cad9315700 Stefan Roesch 2022-04-24 802 if (error < 0) c975cad9315700 Stefan Roesch 2022-04-24 803 return error; c975cad9315700 Stefan Roesch 2022-04-24 804 5a6f52d20ce3cd Christian Brauner 2022-10-28 805 error = do_getxattr(idmap, d, &ctx); c975cad9315700 Stefan Roesch 2022-04-24 806 c975cad9315700 Stefan Roesch 2022-04-24 807 kvfree(ctx.kvalue); ^1da177e4c3f41 Linus Torvalds 2005-04-16 808 return error; ^1da177e4c3f41 Linus Torvalds 2005-04-16 809 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 810 6a7fb6ebe3718c Christian Göttsche 2024-04-26 811 static ssize_t path_getxattrat(int dfd, const char __user *pathname, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 812 unsigned int at_flags, const char __user *name, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 813 void __user *value, size_t size) ^1da177e4c3f41 Linus Torvalds 2005-04-16 814 { 2d8f30380ab8c7 Al Viro 2008-07-22 815 struct path path; ^1da177e4c3f41 Linus Torvalds 2005-04-16 816 ssize_t error; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 817 int lookup_flags; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 818 6a7fb6ebe3718c Christian Göttsche 2024-04-26 819 if ((at_flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 820 return -EINVAL; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 821 6a7fb6ebe3718c Christian Göttsche 2024-04-26 822 lookup_flags = (at_flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 823 if (at_flags & AT_EMPTY_PATH) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 824 lookup_flags |= LOOKUP_EMPTY; 60e66b48ca2081 Jeff Layton 2012-12-11 825 retry: 6a7fb6ebe3718c Christian Göttsche 2024-04-26 826 error = user_path_at(dfd, pathname, lookup_flags, &path); ^1da177e4c3f41 Linus Torvalds 2005-04-16 827 if (error) ^1da177e4c3f41 Linus Torvalds 2005-04-16 828 return error; 5a6f52d20ce3cd Christian Brauner 2022-10-28 829 error = getxattr(mnt_idmap(path.mnt), path.dentry, name, value, size); 2d8f30380ab8c7 Al Viro 2008-07-22 830 path_put(&path); 60e66b48ca2081 Jeff Layton 2012-12-11 831 if (retry_estale(error, lookup_flags)) { 60e66b48ca2081 Jeff Layton 2012-12-11 832 lookup_flags |= LOOKUP_REVAL; 60e66b48ca2081 Jeff Layton 2012-12-11 833 goto retry; 60e66b48ca2081 Jeff Layton 2012-12-11 834 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 835 return error; ^1da177e4c3f41 Linus Torvalds 2005-04-16 836 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 837 6a7fb6ebe3718c Christian Göttsche 2024-04-26 838 SYSCALL_DEFINE6(getxattrat, int, dfd, const char __user *, pathname, unsigned int, at_flags, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 839 const char __user *, name, struct xattr_args __user *, uargs, size_t, usize) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 840 { 6a7fb6ebe3718c Christian Göttsche 2024-04-26 841 struct xattr_args args = {}; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 842 int error; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 843 6a7fb6ebe3718c Christian Göttsche 2024-04-26 844 BUILD_BUG_ON(sizeof(struct xattr_args) < XATTR_ARGS_SIZE_VER0); 6a7fb6ebe3718c Christian Göttsche 2024-04-26 845 BUILD_BUG_ON(sizeof(struct xattr_args) != XATTR_ARGS_SIZE_LATEST); 6a7fb6ebe3718c Christian Göttsche 2024-04-26 846 6a7fb6ebe3718c Christian Göttsche 2024-04-26 847 if (unlikely(usize < XATTR_ARGS_SIZE_VER0)) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 848 return -EINVAL; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 @849 if (usize > PAGE_SIZE) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 850 return -E2BIG; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 851 6a7fb6ebe3718c Christian Göttsche 2024-04-26 852 error = copy_struct_from_user(&args, sizeof(args), uargs, usize); 6a7fb6ebe3718c Christian Göttsche 2024-04-26 853 if (error) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 854 return error; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 855 6a7fb6ebe3718c Christian Göttsche 2024-04-26 856 if (args.flags != 0) 6a7fb6ebe3718c Christian Göttsche 2024-04-26 857 return -EINVAL; 6a7fb6ebe3718c Christian Göttsche 2024-04-26 858 6a7fb6ebe3718c Christian Göttsche 2024-04-26 859 return path_getxattrat(dfd, pathname, at_flags, name, 6a7fb6ebe3718c Christian Göttsche 2024-04-26 860 u64_to_user_ptr(args.value), args.size); 6a7fb6ebe3718c Christian Göttsche 2024-04-26 861 } 6a7fb6ebe3718c Christian Göttsche 2024-04-26 862 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki