/* * Check decoding of fanotify_mark syscall. * * Copyright (c) 2015-2016 Dmitry V. Levin * Copyright (c) 2016 Eugene Syromyatnikov * Copyright (c) 2015-2022 The strace developers. * All rights reserved. * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "tests.h" #include "scno.h" #if defined HAVE_SYS_FANOTIFY_H && defined HAVE_FANOTIFY_MARK # include # include # include # include # include # include "secontext.h" # if XLAT_RAW # define str_fan_mark_add "0x1" # define str_fan_modify_ondir "0x40000002" # define str_at_fdcwd "-100" # elif XLAT_VERBOSE # define str_fan_mark_add "0x1 /* FAN_MARK_ADD */" # define str_fan_modify_ondir "0x40000002 /* FAN_MODIFY|FAN_ONDIR */" # define str_at_fdcwd "-100 /* AT_FDCWD */" # else # define str_fan_mark_add "FAN_MARK_ADD" # define str_fan_modify_ondir "FAN_MODIFY|FAN_ONDIR" # define str_at_fdcwd "AT_FDCWD" # endif # ifndef TEST_SECONTEXT /* Performs fanotify_mark call via the syscall interface. */ static void do_call(kernel_ulong_t fd, kernel_ulong_t flags, const char *flags_str, uint64_t mask, const char *mask_str, kernel_ulong_t dirfd, const char *dirfd_str, kernel_ulong_t path, const char *path_str) { long rc; rc = syscall(__NR_fanotify_mark, fd, flags, # if (LONG_MAX > INT_MAX) \ || (defined __x86_64__ && defined __ILP32__) \ || defined LINUX_MIPSN32 mask, # else /* arch/parisc/kernel/sys_parisc32.c, commit ab8a261b */ # ifdef HPPA LL_VAL_TO_PAIR((mask << 32) | (mask >> 32)), # else LL_VAL_TO_PAIR(mask), # endif # endif dirfd, path); printf("fanotify_mark(%d, %s, %s, %s, %s) = %s\n", (int) fd, flags_str, mask_str, dirfd_str, path_str, sprintrc(rc)); } struct strval { kernel_ulong_t val; const char *str; }; # define STR16 "0123456789abcdef" # define STR64 STR16 STR16 STR16 STR16 # endif /* !TEST_SECONTEXT */ int main(void) { # ifndef TEST_SECONTEXT enum { PATH1_SIZE = 64, }; static const kernel_ulong_t fds[] = { (kernel_ulong_t) 0xdeadfeed12345678ULL, F8ILL_KULONG_MASK, (kernel_ulong_t) 0xdeb0d1edffffffffULL, }; static const struct strval flags[] = { { F8ILL_KULONG_MASK, "0" }, { (kernel_ulong_t) 0xdec0deddefacec00ULL, "0xefacec00" # if !XLAT_RAW " /* FAN_MARK_??? */" # endif }, { (kernel_ulong_t) 0xda7a105700000040ULL, # if XLAT_RAW "0x40" # elif XLAT_VERBOSE "0x40 /* FAN_MARK_IGNORED_SURV_MODIFY */" # else "FAN_MARK_IGNORED_SURV_MODIFY" # endif }, { (kernel_ulong_t) 0xbadc0deddeadffffULL, # if XLAT_RAW || XLAT_VERBOSE "0xdeadffff" # endif # if XLAT_VERBOSE " /* " # endif # if !XLAT_RAW "FAN_MARK_ADD|FAN_MARK_REMOVE|FAN_MARK_DONT_FOLLOW|" "FAN_MARK_ONLYDIR|FAN_MARK_MOUNT|FAN_MARK_IGNORED_MASK|" "FAN_MARK_IGNORED_SURV_MODIFY|FAN_MARK_FLUSH|" "FAN_MARK_FILESYSTEM|FAN_MARK_EVICTABLE|0xdeadfc00" # endif # if XLAT_VERBOSE " */" # endif }, }; static const struct strval64 masks[] = { { ARG_ULL_STR(0) }, { 0xdeadfeedffffffffULL, # if XLAT_RAW || XLAT_VERBOSE "0xdeadfeedffffffff" # endif # if XLAT_VERBOSE " /* " # endif # if !XLAT_RAW "FAN_ACCESS|" "FAN_MODIFY|" "FAN_ATTRIB|" "FAN_CLOSE_WRITE|" "FAN_CLOSE_NOWRITE|" "FAN_OPEN|" "FAN_MOVED_FROM|" "FAN_MOVED_TO|" "FAN_CREATE|" "FAN_DELETE|" "FAN_DELETE_SELF|" "FAN_MOVE_SELF|" "FAN_OPEN_EXEC|" "FAN_Q_OVERFLOW|" "FAN_FS_ERROR|" "FAN_OPEN_PERM|" "FAN_ACCESS_PERM|" "FAN_OPEN_EXEC_PERM|" "FAN_DIR_MODIFY|" "FAN_ONDIR|" "FAN_EVENT_ON_CHILD|" "FAN_RENAME|" "0xdeadfeeda7f02000" # endif # if XLAT_VERBOSE " */" # endif }, { ARG_ULL_STR(0xffffffffa7f02000) # if !XLAT_RAW " /* FAN_??? */" # endif }, }; static const struct strval dirfds[] = { { (kernel_ulong_t) 0xfacefeed00000001ULL, "1" }, { (kernel_ulong_t) 0xdec0ded0ffffffffULL, # if XLAT_RAW "-1" # elif XLAT_VERBOSE "-1 /* FAN_NOFD */" # else "FAN_NOFD" # endif }, { (kernel_ulong_t) 0xbadfacedffffff9cULL, str_at_fdcwd }, { (kernel_ulong_t) 0xdefaced1beeff00dULL, "-1091571699" }, }; static const char str64[] = STR64; static char bogus_path1_addr[sizeof("0x") + sizeof(void *) * 2]; static char bogus_path1_after_addr[sizeof("0x") + sizeof(void *) * 2]; char *bogus_path1 = tail_memdup(str64, PATH1_SIZE); char *bogus_path2 = tail_memdup(str64, sizeof(str64)); struct strval paths[] = { { (kernel_ulong_t) 0, "NULL" }, { (kernel_ulong_t) (uintptr_t) (bogus_path1 + PATH1_SIZE), bogus_path1_after_addr }, { (kernel_ulong_t) (uintptr_t) bogus_path1, bogus_path1_addr }, { (kernel_ulong_t) (uintptr_t) bogus_path2, "\"" STR64 "\"" }, }; snprintf(bogus_path1_addr, sizeof(bogus_path1_addr), "%p", bogus_path1); snprintf(bogus_path1_after_addr, sizeof(bogus_path1_after_addr), "%p", bogus_path1 + PATH1_SIZE); for (unsigned int i = 0; i < ARRAY_SIZE(fds); ++i) { for (unsigned int j = 0; j < ARRAY_SIZE(flags); ++j) { for (unsigned int k = 0; k < ARRAY_SIZE(masks); ++k) { for (unsigned int l = 0; l < ARRAY_SIZE(dirfds); ++l) { for (unsigned int m = 0; m < ARRAY_SIZE(paths); ++m) do_call(fds[i], flags[j].val, flags[j].str, masks[k].val, masks[k].str, dirfds[l].val, dirfds[l].str, paths[m].val, paths[m].str); } } } } # endif /* * Test with AT_FDCWD. */ char *my_secontext = SECONTEXT_PID_MY(); char path[] = "."; char *path_secontext = SECONTEXT_FILE(path); int rc = fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY | FAN_ONDIR, -100, path); printf("%s%s(-1, %s, %s, %s, \"%s\"%s) = %s\n", my_secontext, "fanotify_mark", str_fan_mark_add, str_fan_modify_ondir, str_at_fdcwd, path, path_secontext, sprintrc(rc)); /* * Test with dirfd. */ int cwd_fd = get_dir_fd("."); char *cwd_secontext = SECONTEXT_FILE("."); rc = fanotify_mark(-1, FAN_MARK_ADD, FAN_MODIFY | FAN_ONDIR, cwd_fd, path); printf("%s%s(-1, %s, %s, %d%s, \"%s\"%s) = %s\n", my_secontext, "fanotify_mark", str_fan_mark_add, str_fan_modify_ondir, cwd_fd, cwd_secontext, path, path_secontext, sprintrc(rc)); puts("+++ exited with 0 +++"); return 0; } #else SKIP_MAIN_UNDEFINED("HAVE_SYS_FANOTIFY_H && HAVE_FANOTIFY_MARK") #endif