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ff328ed65adf1e03f2b4f6b06173ec653bfa1bd6
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21 Commits

Author SHA1 Message Date
rsuntk
ff328ed65a kernel: mayfix freeze and reboot issue. 
* When ksys_umount/sys_umount/path_umount were called,
we shouldn't call path_put again.

References:
https://elixir.bootlin.com/linux/v4.19.325/source/fs/namespace.c#L1671
https://elixir.bootlin.com/linux/v5.15.185/source/fs/namespace.c#L1759

Reported-by: NVG-064 <aryslow92@gmail.com>
Signed-off-by: rsuntk <rsuntk@yukiprjkt.my.id>
 2025-06-12 18:24:15 +08:00
rsuntk
f709b0c232 [skip ci] kernel: core_hook: add missing path_put 
[  101.572296] CPU: 0 PID: 8674 Comm: main Tainted: G        WC OE     5.15.148-Ghost@NVG-064-gce02b349fb2b #1
[  101.572305] Hardware name: Qualcomm Technologies, Inc. KHAJE IDP nopmi topaz (DT)
[  101.572309] pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  101.572315] pc : mntput_no_expire+0x25c/0x300
[  101.572328] lr : mntput_no_expire+0x134/0x300
[  101.572334] sp : ffffffc01d163c10
[  101.572336] x29: ffffffc01d163c30 x28: ffffffdb2c74bff0 x27: 0000000000000000
[  101.572345] x26: ffffff806cf11200 x25: ffffff806cf11200 x24: ffffffdb2db93000
[  101.572353] x23: ffffff807df66da0 x22: ffffff807df66d80 x21: ffffff807df66d80
[  101.572361] x20: ffffffdb2db89380 x19: ffffff806cf11200 x18: ffffffc013aad068
[  101.572369] x17: 0000000000000001 x16: ffffffa6c928b000 x15: 0000000000000000
[  101.572378] x14: 0000000000000020 x13: ffffffdb2db9f860 x12: 0000000000000020
[  101.572385] x11: ffffffffffffffff x10: 00000000000000ff x9 : 0000000000000008
[  101.572393] x8 : ffffff807df66d80 x7 : 61705f75736b203a x6 : 55536c656e72654b
[  101.572401] x5 : ffffffdb2de14332 x4 : ffffff81f6c435c1 x3 : 0000000000000000
[  101.572409] x2 : 0000000200000000 x1 : 0000000000000000 x0 : 00000000ffffffff
[  101.572418] Call trace:
[  101.572422] mntput_no_expire+0x25c/0x300
[  101.572431] path_put+0x3c/0x58
[  101.572438] ksu_try_umount+0x14c/0x174
[  101.572445] susfs_try_umount_all+0x6c/0x190
[  101.572450] ksu_handle_setuid+0x20c/0x320
[  101.572454] ksu_task_fix_setuid+0x18/0x2c
[  101.572459] __sys_setresuid+0x1e0/0x3dc
[  101.572466] __arm64_sys_setresuid+0x28/0x38
[  101.572472] invoke_syscall+0x64/0x154
[  101.572479] el0_svc_common+0x90/0xf4
[  101.572484] do_el0_svc+0x2c/0x9c
[  101.572489] el0_svc+0x28/0x60
[  101.572496] el0t_64_sync_handler+0xd4/0xf0
[  101.572501] el0t_64_sync+0x1b8/0x1bc
[  101.572508] ---[ end trace b57c69edb246930f ]---
[  101.572626] ------------[ cut here ]------------

Suggested-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
Signed-off-by: rsuntk <rsuntk@yukiprjkt.my.id>
 2025-06-12 18:24:05 +08:00
backslashxx
70b4551936 kernel: core_hook: fix missed path_put 
make sure to path_put() on all codepaths after kern_path() success

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
Signed-off-by: rsuntk <90097027+rsuntk@users.noreply.github.com>
 2025-06-12 18:23:36 +08:00
backslashxx
1726d0da58 kernel: core_hook: refactor escape_to_root 
- Remove BUG_ON, bail out when failed
- Add put_cred

Signed-off-by: rsuntk <rissu.ntk@gmail.com>
 2025-06-12 18:22:58 +08:00
ShirkNeko
b443b11df9 kernel: Refactoring the mount point unloading logic 2025-06-12 18:17:52 +08:00
rsuntk
9cbfe80640 [skip ci] kernel: minor changes on ksu_sys_umount 
* Simplify value for 'ret', adding some comments

Signed-off-by: rsuntk <rsuntk@yukiprjkt.my.id>
 2025-06-12 15:24:54 +08:00
ShirkNeko
788e4c2f2f kernel: refactor umount functions for improved logging and clarity 
Co-authored-by: rsuntk <rsuntk@yukiprjkt.my.id>
Signed-off-by: ShirkNeko <109797057+ShirkNeko@users.noreply.github.com>
 2025-05-27 15:21:42 +08:00
rsuntk
61e3a9bcf2 kernel: fix ksu_sys_umount compatibility 
* Some people reports about undefined reference to `sys_umount`
* Since ksys_umount exist on Linux 4.17-rc1, then we gonna use that one.

Rev 2: Use correct int instead of long for ksys_umount

Signed-off-by: rsuntk <90097027+rsuntk@users.noreply.github.com>
 2025-05-27 01:13:54 +08:00
rsuntk
1ce706823e kernel: guard nuke_ext4_sysfs 
Rather than using depends on / select,
i just prefer this way, although, yes, it is
an ifdef hell.

Signed-off-by: rsuntk <rsuntk@yukiprjkt.my.id>
 2025-05-24 15:03:24 +08:00
rsuntk
84a0ab78fb kernel: make path_umount backporting as optional 
Since https://github.com/backslashxx/KernelSU/commit/4f8943a, path_umount is no longer needed.

Signed-off-by: rsuntk <rsuntk@yukiprjkt.my.id>
 2025-05-24 15:02:40 +08:00
backslashxx
cd32ee21be kernel: core_hook: screw path_umount backport, call sys_umount directly 
I am repasting here what I posted on the source code originally:

/*
 * turns out path_umount backport is completely unneeded
 * we copy the trick used on strncpy_from_unsafe_user / strncpy_from_user_nofault
 * https://elixir.bootlin.com/linux/v4.4.302/source/mm/maccess.c#L184
 * basically
 *
 *     mm_segment_t old_fs = get_fs();     // remember original fs segment
 *     set_fs(USER_DS);                    // or KERNEL_DS *
 *     do_whatever_in_userspace();
 *     set_fs(old_fs);                     // restore fs segment
 *
 *  * kernel -> user, KERNEL_DS, user -> kernel, USER_DS
 *
 * so yes, we can try to straight up call a syscall from kernel space
 *
 * NOTE: on newer kernels you can use force_uaccess_begin + force_uaccess_end
 * ref: https://elixir.bootlin.com/linux/v5.10.237/source/mm/maccess.c#L250
 *
 */

path_umount backport now optional — neat trick, werks, what can I say.

Backports? Nah, we’re good.

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>
 2025-05-24 14:43:07 +08:00
ShirkNeko
bbb072b776 Refactoring KPM support to check KPM status using CMD_ENABLE_KPM 2025-05-24 14:36:41 +08:00
ShirkNeko
95c47b8602 Fixed misspelling of CONFIG_KSU_HOOK_KPROBES to CONFIG_KSU_KPROBES_HOOK in Makefile and related files. 2025-05-17 18:33:29 +08:00
ShirkNeko
d9063377af Rearrange KSU related conditional compilation support in core_hook.c to improve code readability 2025-04-23 15:35:19 +08:00
ShirkNeko
dfaada7134 Patch update SuSFS version to 1.5.6 2025-04-22 16:20:41 +08:00
ShirkNeko
f0a14e54e6 在core_hook.c中添加对KPM的条件编译支持 2025-04-21 10:31:50 +08:00
ShirkNeko
28f006ed39 Refactor Kconfig and Makefile, update KPROBES related configurations, simplify conditional compilation logic 2025-04-17 19:46:14 +08:00
ShirkNeko
6cf8f77b61 Add an uninstall attempt for the “/data/adb/kpm” path in the kernel mount logic to enhance the integrity of path management 2025-04-11 20:22:48 +08:00
ShirkNeko
6c4b73a38e 更新 KPM 模块，调整函数参数以支持额外的用户结果返回 2025-03-31 20:10:32 +08:00
ShirkNeko
743ddce9f7 添加 KPM 模块支持，包括 KPM 配置选项、核心功能实现及相关头文件 2025-03-30 02:54:23 +08:00
樱檩殇雪
ad064fea9e add susfs-dev branch files 2025-03-17 02:48:59 +08:00