1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _LINUX_SCHED_COREDUMP_H |
3 | #define _LINUX_SCHED_COREDUMP_H |
4 | |
5 | #include <linux/mm_types.h> |
6 | |
7 | #define SUID_DUMP_DISABLE 0 /* No setuid dumping */ |
8 | #define SUID_DUMP_USER 1 /* Dump as user of process */ |
9 | #define SUID_DUMP_ROOT 2 /* Dump as root */ |
10 | |
11 | /* mm flags */ |
12 | |
13 | /* for SUID_DUMP_* above */ |
14 | #define MMF_DUMPABLE_BITS 2 |
15 | #define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1) |
16 | |
17 | extern void set_dumpable(struct mm_struct *mm, int value); |
18 | /* |
19 | * This returns the actual value of the suid_dumpable flag. For things |
20 | * that are using this for checking for privilege transitions, it must |
21 | * test against SUID_DUMP_USER rather than treating it as a boolean |
22 | * value. |
23 | */ |
24 | static inline int __get_dumpable(unsigned long mm_flags) |
25 | { |
26 | return mm_flags & MMF_DUMPABLE_MASK; |
27 | } |
28 | |
29 | static inline int get_dumpable(struct mm_struct *mm) |
30 | { |
31 | return __get_dumpable(mm_flags: mm->flags); |
32 | } |
33 | |
34 | /* coredump filter bits */ |
35 | #define MMF_DUMP_ANON_PRIVATE 2 |
36 | #define MMF_DUMP_ANON_SHARED 3 |
37 | #define MMF_DUMP_MAPPED_PRIVATE 4 |
38 | #define MMF_DUMP_MAPPED_SHARED 5 |
39 | #define 6 |
40 | #define MMF_DUMP_HUGETLB_PRIVATE 7 |
41 | #define MMF_DUMP_HUGETLB_SHARED 8 |
42 | #define MMF_DUMP_DAX_PRIVATE 9 |
43 | #define MMF_DUMP_DAX_SHARED 10 |
44 | |
45 | #define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS |
46 | #define MMF_DUMP_FILTER_BITS 9 |
47 | #define MMF_DUMP_FILTER_MASK \ |
48 | (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT) |
49 | #define MMF_DUMP_FILTER_DEFAULT \ |
50 | ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\ |
51 | (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF) |
52 | |
53 | #ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS |
54 | # define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS) |
55 | #else |
56 | # define MMF_DUMP_MASK_DEFAULT_ELF 0 |
57 | #endif |
58 | /* leave room for more dump flags */ |
59 | #define MMF_VM_MERGEABLE 16 /* KSM may merge identical pages */ |
60 | #define MMF_VM_HUGEPAGE 17 /* set when mm is available for |
61 | khugepaged */ |
62 | /* |
63 | * This one-shot flag is dropped due to necessity of changing exe once again |
64 | * on NFS restore |
65 | */ |
66 | //#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */ |
67 | |
68 | #define MMF_HAS_UPROBES 19 /* has uprobes */ |
69 | #define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */ |
70 | #define MMF_OOM_SKIP 21 /* mm is of no interest for the OOM killer */ |
71 | #define MMF_UNSTABLE 22 /* mm is unstable for copy_from_user */ |
72 | #define MMF_HUGE_ZERO_PAGE 23 /* mm has ever used the global huge zero page */ |
73 | #define MMF_DISABLE_THP 24 /* disable THP for all VMAs */ |
74 | #define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP) |
75 | #define MMF_OOM_REAP_QUEUED 25 /* mm was queued for oom_reaper */ |
76 | #define MMF_MULTIPROCESS 26 /* mm is shared between processes */ |
77 | /* |
78 | * MMF_HAS_PINNED: Whether this mm has pinned any pages. This can be either |
79 | * replaced in the future by mm.pinned_vm when it becomes stable, or grow into |
80 | * a counter on its own. We're aggresive on this bit for now: even if the |
81 | * pinned pages were unpinned later on, we'll still keep this bit set for the |
82 | * lifecycle of this mm, just for simplicity. |
83 | */ |
84 | #define MMF_HAS_PINNED 27 /* FOLL_PIN has run, never cleared */ |
85 | |
86 | #define MMF_HAS_MDWE 28 |
87 | #define MMF_HAS_MDWE_MASK (1 << MMF_HAS_MDWE) |
88 | |
89 | |
90 | #define MMF_HAS_MDWE_NO_INHERIT 29 |
91 | |
92 | #define MMF_VM_MERGE_ANY 30 |
93 | #define MMF_VM_MERGE_ANY_MASK (1 << MMF_VM_MERGE_ANY) |
94 | |
95 | #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\ |
96 | MMF_DISABLE_THP_MASK | MMF_HAS_MDWE_MASK |\ |
97 | MMF_VM_MERGE_ANY_MASK) |
98 | |
99 | static inline unsigned long mmf_init_flags(unsigned long flags) |
100 | { |
101 | if (flags & (1UL << MMF_HAS_MDWE_NO_INHERIT)) |
102 | flags &= ~((1UL << MMF_HAS_MDWE) | |
103 | (1UL << MMF_HAS_MDWE_NO_INHERIT)); |
104 | return flags & MMF_INIT_MASK; |
105 | } |
106 | |
107 | #endif /* _LINUX_SCHED_COREDUMP_H */ |
108 | |