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fs/proc/base: Allow AppCompactor to access reclaim
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On AOSP ROMs CachedAppOptimizer tries to access reclaim for allocation
stats, process id and name
But CAF restricts userspace access to reclaim resulting in following
warning

[   29.986900] ------------[ cut here ]------------
[   29.986921] mWARNING: CPU: 1 PID: 1858 at
../../../../../../kernel/xiaomi/raphael/mm/vmscan.c:1685
isolate_lru_page+0x1e4/0x1ec
[   29.986925] Modules linked in:
[   29.986932] mCPU: 1 PID: 1858 Comm: CachedAppOptimi Tainted: G S
4.14.210-IMMENSiTY//f950c60da2 #2
[   29.986934] mHardware name: Qualcomm Technologies, Inc. SM8150 V2
PM8150 RAPHAEL (DT)
[   29.986937] mtask: 0000000050b69203 task.stack: 000000007e9ca8b3
[   29.986939] mpc : isolate_lru_page+0x1e4/0x1ec
[   29.986942] mlr : isolate_lru_page+0x1e4/0x1ec
[   29.986943] msp : ffffff8024893a90 pstate : 60000145
[   29.986945] mx29: ffffff8024893a90 x28: 0400000000000001
[   29.986948] mx27: ffffff8024893c18 x26: 0000000000000000
[   29.986952] mx25: 0000000000000000 x24: ffffffbf98cbbc40
[   29.986955] mx23: ffffffe61b3f7b08 x22: 0000000000000000
[   29.986958] mx21: ffffffe61b8010c0 x20: 00000007ffd61000
[   29.986962] mx19: ffffffbf98cbbc40 x18: 0000007922434000
[   29.986965] mx17: 0000000000000000 x16: 0000000000000001
[   29.986968] mx15: ffffffffffffffff x14: 0000007c49f7bd22
[   29.986972] mx13: 0000000000000004 x12: 0000000000000000
[   29.986975] mx11: 0000000000000000 x10: ffffffffffffffff
[   29.986978] mx9 : 7bee4e9ab8c00e00 x8 : 7bee4e9ab8c00e00
[   29.986981] mx7 : 000000000000001b x6 : ffffff9586fd3b93
[   29.986985] mx5 : ffffff80248937d8 x4 : 0000000000000000
[   29.986988] mx3 : 0000000000000065 x2 : 000000000000001b
[   29.986991] mx1 : 00000000000001c0 x0 : 000000000000001b
[   29.986995] m\x0aPC: 0xffffff95849f8650:
[   29.986996] 8650  2a1603e2 94012ce6 2a1f03f3 f94002e8 5282c009
8b090100 944e0032 2a1303e0
[   29.987007] 8670  a9434ff4 a94257f6 f9400bf7 a8c47bfd d65f03c0
9000c620 9106b400 97fcc349
[   29.987017] 8690  d4210000 17ffff94 d102c3ff b0010f28 f9478508
a9067bfd 910183fd f9003bf9
[   29.987026] 86b0  a9085ff8 a90957f6 a90a4ff4 f81f83a8 52801808
52800049 5280018a 72a02808
[   29.987036] m\x0aLR: 0xffffff95849f8650:
[   29.987037] 8650  2a1603e2 94012ce6 2a1f03f3 f94002e8 5282c009
8b090100 944e0032 2a1303e0
[   29.987047] 8670  a9434ff4 a94257f6 f9400bf7 a8c47bfd d65f03c0
9000c620 9106b400 97fcc349
[   29.987056] 8690  d4210000 17ffff94 d102c3ff b0010f28 f9478508
a9067bfd 910183fd f9003bf9
[   29.987066] 86b0  a9085ff8 a90957f6 a90a4ff4 f81f83a8 52801808
52800049 5280018a 72a02808
[   29.987076] m\x0aSP: 0xffffff8024893a50:
[   29.987077] 3a50  849f8690 ffffff95 60000145 00000000 ffffffc8
ffffff80 b8c00e00 7bee4e9a
[   29.987086] 3a70  ffffffff 0000007f 849f8690 ffffff95 24893a90
ffffff80 849f8690 ffffff95
[   29.987096] 3a90  24893b00 ffffff80 84adfba8 ffffff95 1b3f7b08
ffffffe6 1b3f7b00 ffffffe6
[   29.987105] 3ab0  00000000 00000000 1b8010c0 ffffffe6 ffd61000
00000007 ffda0000 00000007
[   29.987115]
[   29.987116] Call trace:
[   29.987119] isolate_lru_page+0x1e4/0x1ec
[   29.987125] reclaim_pte_range+0x144/0x230
[   29.987129] __walk_page_range+0x120/0x224
[   29.987132] walk_page_range+0x4c/0x128
[   29.987135] reclaim_write+0x298/0x3a8
[   29.987140] __vfs_write+0x44/0x134
[   29.987142] vfs_write+0xe0/0x19c
[   29.987144] SyS_write+0x6c/0xcc
[   29.987148] el0_svc_naked+0x34/0x38
[   29.987150] ---[ end trace 17986baba9f80714 ]---
[   29.987155] trying to isolate tail page
[   29.987162] ------------[ cut here ]------------
[   29.987169] mWARNING: CPU: 1 PID: 1858 at
../../../../../../kernel/xiaomi/raphael/mm/vmscan.c:1685
isolate_lru_page+0x1e4/0x1ec
[   29.987172] Modules linked in:
[   29.987176] mCPU: 1 PID: 1858 Comm: CachedAppOptimi Tainted: G S
W       4.14.210-IMMENSiTY//f950c60da2 #2
[   29.987178] mHardware name: Qualcomm Technologies, Inc. SM8150 V2
PM8150 RAPHAEL (DT)
[   29.987179] mtask: 0000000050b69203 task.stack: 000000007e9ca8b3
[   29.987182] mpc : isolate_lru_page+0x1e4/0x1ec
[   29.987184] mlr : isolate_lru_page+0x1e4/0x1ec
[   29.987186] msp : ffffff8024893a90 pstate : 60000145
[   29.987187] mx29: ffffff8024893a90 x28: 0400000000000001
[   29.987191] mx27: ffffff8024893c18 x26: 0000000000000000
[   29.987194] mx25: 0000000000000000 x24: ffffffbf98cbbc80
[   29.987197] mx23: ffffffe61b3f7b10 x22: 0000000000000000
[   29.987200] mx21: ffffffe61b8010c0 x20: 00000007ffd62000
[   29.987204] mx19: ffffffbf98cbbc80 x18: 0000007922434000
[   29.987207] mx17: 0000000000000000 x16: 0000000000000001
[   29.987210] mx15: ffffffffffffffff x14: 0000007c49f7bd22
[   29.987213] mx13: 0000000000000004 x12: 0000000000000000
[   29.987216] mx11: 0000000000000000 x10: ffffffffffffffff
[   29.987220] mx9 : 7bee4e9ab8c00e00 x8 : 7bee4e9ab8c00e00
[   29.987223] mx7 : 000000000000001b x6 : ffffff9586fd3b93
[   29.987226] mx5 : ffffff80248937d8 x4 : 0000000000000000
[   29.987229] mx3 : 0000000000000065 x2 : 000000000000001b
[   29.987232] mx1 : 00000000000001c0 x0 : 000000000000001b
[   29.987236] m\x0aPC: 0xffffff95849f8650:
[   29.987237] 8650  2a1603e2 94012ce6 2a1f03f3 f94002e8 5282c009
8b090100 944e0032 2a1303e0
[   29.987246] 8670  a9434ff4 a94257f6 f9400bf7 a8c47bfd d65f03c0
9000c620 9106b400 97fcc349
[   29.987256] 8690  d4210000 17ffff94 d102c3ff b0010f28 f9478508
a9067bfd 910183fd f9003bf9
[   29.987265] 86b0  a9085ff8 a90957f6 a90a4ff4 f81f83a8 52801808
52800049 5280018a 72a02808
[   29.987275] m\x0aLR: 0xffffff95849f8650:
[   29.987276] 8650  2a1603e2 94012ce6 2a1f03f3 f94002e8 5282c009
8b090100 944e0032 2a1303e0
[   29.987285] 8670  a9434ff4 a94257f6 f9400bf7 a8c47bfd d65f03c0
9000c620 9106b400 97fcc349
[   29.987295] 8690  d4210000 17ffff94 d102c3ff b0010f28 f9478508
a9067bfd 910183fd f9003bf9
[   29.987304] 86b0  a9085ff8 a90957f6 a90a4ff4 f81f83a8 52801808
52800049 5280018a 72a02808
[   29.987314] m\x0aSP: 0xffffff8024893a50:
[   29.987315] 3a50  849f8690 ffffff95 60000145 00000000 ffffffc8
ffffff80 b8c00e00 7bee4e9a
[   29.987324] 3a70  ffffffff 0000007f 849f8690 ffffff95 24893a90
ffffff80 849f8690 ffffff95
[   29.987334] 3a90  24893b00 ffffff80 84adfba8 ffffff95 1b3f7b10
ffffffe6 1b3f7b00 ffffffe6
[   29.987343] 3ab0  00000000 00000000 1b8010c0 ffffffe6 ffd62000
00000007 ffda0000 00000007
[   29.987353]
[   29.987354] Call trace:
[   29.987357] isolate_lru_page+0x1e4/0x1ec
[   29.987359] reclaim_pte_range+0x144/0x230
[   29.987362] __walk_page_range+0x120/0x224
[   29.987365] walk_page_range+0x4c/0x128
[   29.987368] reclaim_write+0x298/0x3a8
[   29.987370] __vfs_write+0x44/0x134
[   29.987373] vfs_write+0xe0/0x19c
[   29.987375] SyS_write+0x6c/0xcc
[   29.987377] el0_svc_naked+0x34/0x38
[   29.987379] ---[ end trace 17986baba9f80715 ]---
[   29.987385] trying to isolate tail page
[   29.987391] ------------[ cut here ]------------

pixel devices also uses the same permissions for their per-process
reclaim
[*]GrapheneOS-Archive/kernel_msm-coral@18c2af0

Signed-off-by: UtsavBalar1231 <[email protected]>
Signed-off-by: pix106 <[email protected]>
Change-Id: I1d7138d343cf1f1230886bfd47efc3439f273b07
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@UtsavBalar1231 @reocat
UtsavBalar1231 authored and reocat committed Jan 8, 2024
1 parent da9cc99 commit 75c1eaf
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion fs/proc/base.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -3127,7 +3127,7 @@ static const struct pid_entry tgid_base_stuff[] = {
REG("mountinfo", S_IRUGO, proc_mountinfo_operations),
REG("mountstats", S_IRUSR, proc_mountstats_operations),
#ifdef CONFIG_PROCESS_RECLAIM
REG("reclaim", S_IWUSR, proc_reclaim_operations),
REG("reclaim", S_IWUGO, proc_reclaim_operations),
#endif
#ifdef CONFIG_PROC_PAGE_MONITOR
REG("clear_refs", S_IWUSR, proc_clear_refs_operations),
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