Line data Source code
1 : /* THIS FILE WAS GENERATED BY generate_filters.py. DO NOT EDIT BY HAND! */
2 : #ifndef HEADER_fd_src_app_shared_commands_monitor_generated_monitor_seccomp_h
3 : #define HEADER_fd_src_app_shared_commands_monitor_generated_monitor_seccomp_h
4 :
5 : #if defined(__linux__)
6 :
7 : #include "../../../../../../src/util/fd_util_base.h"
8 : #include <linux/audit.h>
9 : #include <linux/capability.h>
10 : #include <linux/filter.h>
11 : #include <linux/seccomp.h>
12 : #include <linux/bpf.h>
13 : #include <linux/unistd.h>
14 : #include <sys/syscall.h>
15 : #include <signal.h>
16 : #include <stddef.h>
17 :
18 : #if defined(__i386__)
19 : # define ARCH_NR AUDIT_ARCH_I386
20 : #elif defined(__x86_64__)
21 : # define ARCH_NR AUDIT_ARCH_X86_64
22 : #elif defined(__aarch64__)
23 : # define ARCH_NR AUDIT_ARCH_AARCH64
24 : #else
25 : # error "Target architecture is unsupported by seccomp."
26 : #endif
27 : static const unsigned int sock_filter_policy_monitor_instr_cnt = 36;
28 :
29 0 : static void populate_sock_filter_policy_monitor( ulong out_cnt, struct sock_filter * out, unsigned int logfile_fd, unsigned int drain_output_fd ) {
30 0 : FD_TEST( out_cnt >= 36 );
31 0 : struct sock_filter filter[36] = {
32 : /* Check: Jump to RET_KILL_PROCESS if the script's arch != the runtime arch */
33 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, ( offsetof( struct seccomp_data, arch ) ) ),
34 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, ARCH_NR, 0, /* RET_KILL_PROCESS */ 32 ),
35 : /* loading syscall number in accumulator */
36 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, ( offsetof( struct seccomp_data, nr ) ) ),
37 : /* allow write based on expression */
38 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, SYS_write, /* check_write */ 8, 0 ),
39 : /* allow fsync based on expression */
40 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, SYS_fsync, /* check_fsync */ 13, 0 ),
41 : /* simply allow nanosleep */
42 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, SYS_nanosleep, /* RET_ALLOW */ 29, 0 ),
43 : /* simply allow sched_yield */
44 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, SYS_sched_yield, /* RET_ALLOW */ 28, 0 ),
45 : /* simply allow exit_group */
46 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, SYS_exit_group, /* RET_ALLOW */ 27, 0 ),
47 : /* allow read based on expression */
48 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, SYS_read, /* check_read */ 11, 0 ),
49 : /* allow ioctl based on expression */
50 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, SYS_ioctl, /* check_ioctl */ 14, 0 ),
51 : /* allow pselect6 based on expression */
52 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, SYS_pselect6, /* check_pselect6 */ 19, 0 ),
53 : /* none of the syscalls matched */
54 0 : { BPF_JMP | BPF_JA, 0, 0, /* RET_KILL_PROCESS */ 22 },
55 : // check_write:
56 : /* load syscall argument 0 in accumulator */
57 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[0])),
58 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, 1, /* RET_ALLOW */ 21, /* lbl_1 */ 0 ),
59 : // lbl_1:
60 : /* load syscall argument 0 in accumulator */
61 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[0])),
62 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, 2, /* RET_ALLOW */ 19, /* lbl_2 */ 0 ),
63 : // lbl_2:
64 : /* load syscall argument 0 in accumulator */
65 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[0])),
66 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, logfile_fd, /* RET_ALLOW */ 17, /* RET_KILL_PROCESS */ 16 ),
67 : // check_fsync:
68 : /* load syscall argument 0 in accumulator */
69 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[0])),
70 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, logfile_fd, /* RET_ALLOW */ 15, /* RET_KILL_PROCESS */ 14 ),
71 : // check_read:
72 : /* load syscall argument 0 in accumulator */
73 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[0])),
74 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, drain_output_fd, /* RET_ALLOW */ 13, /* lbl_3 */ 0 ),
75 : // lbl_3:
76 : /* load syscall argument 0 in accumulator */
77 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[0])),
78 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, 0, /* RET_ALLOW */ 11, /* RET_KILL_PROCESS */ 10 ),
79 : // check_ioctl:
80 : /* load syscall argument 0 in accumulator */
81 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[0])),
82 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, 0, /* lbl_4 */ 0, /* RET_KILL_PROCESS */ 8 ),
83 : // lbl_4:
84 : /* load syscall argument 1 in accumulator */
85 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[1])),
86 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, TCGETS, /* RET_ALLOW */ 7, /* lbl_5 */ 0 ),
87 : // lbl_5:
88 : /* load syscall argument 1 in accumulator */
89 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[1])),
90 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, TCSETS, /* RET_ALLOW */ 5, /* RET_KILL_PROCESS */ 4 ),
91 : // check_pselect6:
92 : /* load syscall argument 0 in accumulator */
93 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[0])),
94 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, 1, /* lbl_6 */ 0, /* RET_KILL_PROCESS */ 2 ),
95 : // lbl_6:
96 : /* load syscall argument 2 in accumulator */
97 0 : BPF_STMT( BPF_LD | BPF_W | BPF_ABS, offsetof(struct seccomp_data, args[2])),
98 0 : BPF_JUMP( BPF_JMP | BPF_JEQ | BPF_K, 0, /* RET_ALLOW */ 1, /* RET_KILL_PROCESS */ 0 ),
99 : // RET_KILL_PROCESS:
100 : /* KILL_PROCESS is placed before ALLOW since it's the fallthrough case. */
101 0 : BPF_STMT( BPF_RET | BPF_K, SECCOMP_RET_KILL_PROCESS ),
102 : // RET_ALLOW:
103 : /* ALLOW has to be reached by jumping */
104 : BPF_STMT( BPF_RET | BPF_K, SECCOMP_RET_ALLOW ),
105 0 : };
106 0 : fd_memcpy( out, filter, sizeof( filter ) );
107 0 : }
108 :
109 : #endif /* defined(__linux__) */
110 :
111 : #endif /* HEADER_fd_src_app_shared_commands_monitor_generated_monitor_seccomp_h */
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