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Confused #78

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12D687 opened this issue Feb 13, 2023 · 1 comment
Closed

Confused #78

12D687 opened this issue Feb 13, 2023 · 1 comment

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@12D687
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12D687 commented Feb 13, 2023 •
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@hahahahacker2009
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Learn to install linux: make -j4 && make modules_install && make install. The same applies to linux-hardened or any linux.

The patch is to update the existing, downloaded, unpatched source code. When you patched the source, repeat what you do to install the kernel and just what changed will be apply.

nbouchinet-anssi pushed a commit to nbouchinet-anssi/linux-hardened that referenced this issue Jul 17, 2023
@lweiss-fairphone @gregkh
remoteproc: qcom_q6v5_pas: detach power domains on remove
d7628eb 
[ Upstream commit 34d01df ]

We need to detach from the power domains also on remove, not just on
probe fail so a subsequent probe works as expected.

Otherwise the following error appears on re-probe:

[   29.452005] sysfs: cannot create duplicate filename '/devices/genpd:0:3000000.remoteproc'
[   29.477121] CPU: 1 PID: 483 Comm: sh Tainted: G        W          6.1.0-rc4-00075-g71a113770bda anthraxx#78
[   29.510319] Hardware name: Fairphone 4 (DT)
[   29.538335] Call trace:
[   29.564470]  dump_backtrace.part.0+0xe0/0xf0
[   29.592602]  show_stack+0x18/0x30
[   29.619616]  dump_stack_lvl+0x64/0x80
[   29.646834]  dump_stack+0x18/0x34
[   29.673541]  sysfs_warn_dup+0x60/0x7c
[   29.700592]  sysfs_create_dir_ns+0xec/0x110
[   29.728057]  kobject_add_internal+0xb8/0x374
[   29.755530]  kobject_add+0x9c/0x104
[   29.782072]  device_add+0xbc/0x8a0
[   29.808445]  device_register+0x20/0x30
[   29.835175]  genpd_dev_pm_attach_by_id+0xa4/0x190
[   29.862851]  genpd_dev_pm_attach_by_name+0x3c/0xb0
[   29.890472]  dev_pm_domain_attach_by_name+0x20/0x30
[   29.918212]  adsp_probe+0x278/0x580
[   29.944384]  platform_probe+0x68/0xc0
[   29.970603]  really_probe+0xbc/0x2dc
[   29.996662]  __driver_probe_device+0x78/0xe0
[   30.023491]  device_driver_attach+0x48/0xac
[   30.050215]  bind_store+0xb8/0x114
[   30.075957]  drv_attr_store+0x24/0x3c
[   30.101874]  sysfs_kf_write+0x44/0x54
[   30.127751]  kernfs_fop_write_iter+0x120/0x1f0
[   30.154448]  vfs_write+0x1ac/0x380
[   30.179937]  ksys_write+0x70/0x104
[   30.205274]  __arm64_sys_write+0x1c/0x2c
[   30.231060]  invoke_syscall+0x48/0x114
[   30.256594]  el0_svc_common.constprop.0+0x44/0xec
[   30.283183]  do_el0_svc+0x2c/0xd0
[   30.308320]  el0_svc+0x2c/0x84
[   30.333059]  el0t_64_sync_handler+0xf4/0x120
[   30.359001]  el0t_64_sync+0x18c/0x190
[   30.384385] kobject_add_internal failed for genpd:0:3000000.remoteproc with -EEXIST, don't try to register things with the same name in the same directory.
[   30.406029] remoteproc remoteproc0: releasing 3000000.remoteproc
[   30.416064] qcom_q6v5_pas: probe of 3000000.remoteproc failed with error -17

Fixes: 17ee2fb ("remoteproc: qcom: pas: Vote for active/proxy power domains")
Reviewed-by: Sibi Sankar <quic_sibis@quicinc.com>
Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221118090816.100012-2-luca.weiss@fairphone.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
nbouchinet-anssi pushed a commit to nbouchinet-anssi/linux-hardened that referenced this issue Jul 17, 2023
@LorenzoBianconi @gregkh
wifi: mt76: do not run mt76u_status_worker if the device is not running
69346de 
[ Upstream commit bd5dac7 ]

Fix the following NULL pointer dereference avoiding to run
mt76u_status_worker thread if the device is not running yet.

KASAN: null-ptr-deref in range
[0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 98 Comm: kworker/u2:2 Not tainted 5.14.0+ anthraxx#78 Hardware
name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
Workqueue: mt76 mt76u_tx_status_data
RIP: 0010:mt76x02_mac_fill_tx_status.isra.0+0x82c/0x9e0
Code: c5 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 94 01 00 00
48 b8 00 00 00 00 00 fc ff df 4d 8b 34 24 4c 89 f2 48 c1 ea 03 <0f>
b6
04 02 84 c0 74 08 3c 03 0f 8e 89 01 00 00 41 8b 16 41 0f b7
RSP: 0018:ffffc900005af988 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffc900005afae8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff832fc661 RDI: ffffc900005afc2a
RBP: ffffc900005afae0 R08: 0000000000000001 R09: fffff520000b5f3c
R10: 0000000000000003 R11: fffff520000b5f3b R12: ffff88810b6132d8
R13: 000000000000ffff R14: 0000000000000000 R15: ffffc900005afc28
FS:  0000000000000000(0000) GS:ffff88811aa00000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0eda6a000 CR3: 0000000118f17000 CR4: 0000000000750ef0
PKRU: 55555554
Call Trace:
 mt76x02_send_tx_status+0x1d2/0xeb0
 mt76x02_tx_status_data+0x8e/0xd0
 mt76u_tx_status_data+0xe1/0x240
 process_one_work+0x92b/0x1460
 worker_thread+0x95/0xe00
 kthread+0x3a1/0x480
 ret_from_fork+0x1f/0x30
Modules linked in:
--[ end trace 8df5d20fc5040f65 ]--
RIP: 0010:mt76x02_mac_fill_tx_status.isra.0+0x82c/0x9e0
Code: c5 48 b8 00 00 00 00 00 fc ff df 80 3c 02 00 0f 85 94 01 00 00
48 b8 00 00 00 00 00 fc ff df 4d 8b 34 24 4c 89 f2 48 c1 ea 03 <0f>
b6
04 02 84 c0 74 08 3c 03 0f 8e 89 01 00 00 41 8b 16 41 0f b7
RSP: 0018:ffffc900005af988 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffc900005afae8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff832fc661 RDI: ffffc900005afc2a
RBP: ffffc900005afae0 R08: 0000000000000001 R09: fffff520000b5f3c
R10: 0000000000000003 R11: fffff520000b5f3b R12: ffff88810b6132d8
R13: 000000000000ffff R14: 0000000000000000 R15: ffffc900005afc28
FS:  0000000000000000(0000) GS:ffff88811aa00000(0000)
knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa0eda6a000 CR3: 0000000118f17000 CR4: 0000000000750ef0
PKRU: 55555554

Moreover move stat_work schedule out of the for loop.

Reported-by: Dokyung Song <dokyungs@yonsei.ac.kr>
Co-developed-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
anthraxx pushed a commit that referenced this issue Feb 13, 2024
@gregkh
bpf: Fix a few selftest failures due to llvm18 change
e02851a 
[ Upstream commit b16904f ]

With latest upstream llvm18, the following test cases failed:

  $ ./test_progs -j
  #13/2    bpf_cookie/multi_kprobe_link_api:FAIL
  #13/3    bpf_cookie/multi_kprobe_attach_api:FAIL
  #13      bpf_cookie:FAIL
  #77      fentry_fexit:FAIL
  #78/1    fentry_test/fentry:FAIL
  #78      fentry_test:FAIL
  #82/1    fexit_test/fexit:FAIL
  #82      fexit_test:FAIL
  #112/1   kprobe_multi_test/skel_api:FAIL
  #112/2   kprobe_multi_test/link_api_addrs:FAIL
  [...]
  #112     kprobe_multi_test:FAIL
  #356/17  test_global_funcs/global_func17:FAIL
  #356     test_global_funcs:FAIL

Further analysis shows llvm upstream patch [1] is responsible for the above
failures. For example, for function bpf_fentry_test7() in net/bpf/test_run.c,
without [1], the asm code is:

  0000000000000400 <bpf_fentry_test7>:
     400: f3 0f 1e fa                   endbr64
     404: e8 00 00 00 00                callq   0x409 <bpf_fentry_test7+0x9>
     409: 48 89 f8                      movq    %rdi, %rax
     40c: c3                            retq
     40d: 0f 1f 00                      nopl    (%rax)

... and with [1], the asm code is:

  0000000000005d20 <bpf_fentry_test7.specialized.1>:
    5d20: e8 00 00 00 00                callq   0x5d25 <bpf_fentry_test7.specialized.1+0x5>
    5d25: c3                            retq

... and <bpf_fentry_test7.specialized.1> is called instead of <bpf_fentry_test7>
and this caused test failures for #13/#77 etc. except #356.

For test case #356/17, with [1] (progs/test_global_func17.c)), the main prog
looks like:

  0000000000000000 <global_func17>:
       0:       b4 00 00 00 2a 00 00 00 w0 = 0x2a
       1:       95 00 00 00 00 00 00 00 exit

... which passed verification while the test itself expects a verification
failure.

Let us add 'barrier_var' style asm code in both places to prevent function
specialization which caused selftests failure.

  [1] llvm/llvm-project#72903

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20231127050342.1945270-1-yonghong.song@linux.dev
Signed-off-by: Sasha Levin <sashal@kernel.org>
anthraxx pushed a commit that referenced this issue Feb 13, 2024
@gregkh
bpf: Fix a few selftest failures due to llvm18 change
58bb568 
[ Upstream commit b16904f ]

With latest upstream llvm18, the following test cases failed:

  $ ./test_progs -j
  #13/2    bpf_cookie/multi_kprobe_link_api:FAIL
  #13/3    bpf_cookie/multi_kprobe_attach_api:FAIL
  #13      bpf_cookie:FAIL
  #77      fentry_fexit:FAIL
  #78/1    fentry_test/fentry:FAIL
  #78      fentry_test:FAIL
  #82/1    fexit_test/fexit:FAIL
  #82      fexit_test:FAIL
  #112/1   kprobe_multi_test/skel_api:FAIL
  #112/2   kprobe_multi_test/link_api_addrs:FAIL
  [...]
  #112     kprobe_multi_test:FAIL
  #356/17  test_global_funcs/global_func17:FAIL
  #356     test_global_funcs:FAIL

Further analysis shows llvm upstream patch [1] is responsible for the above
failures. For example, for function bpf_fentry_test7() in net/bpf/test_run.c,
without [1], the asm code is:

  0000000000000400 <bpf_fentry_test7>:
     400: f3 0f 1e fa                   endbr64
     404: e8 00 00 00 00                callq   0x409 <bpf_fentry_test7+0x9>
     409: 48 89 f8                      movq    %rdi, %rax
     40c: c3                            retq
     40d: 0f 1f 00                      nopl    (%rax)

... and with [1], the asm code is:

  0000000000005d20 <bpf_fentry_test7.specialized.1>:
    5d20: e8 00 00 00 00                callq   0x5d25 <bpf_fentry_test7.specialized.1+0x5>
    5d25: c3                            retq

... and <bpf_fentry_test7.specialized.1> is called instead of <bpf_fentry_test7>
and this caused test failures for #13/#77 etc. except #356.

For test case #356/17, with [1] (progs/test_global_func17.c)), the main prog
looks like:

  0000000000000000 <global_func17>:
       0:       b4 00 00 00 2a 00 00 00 w0 = 0x2a
       1:       95 00 00 00 00 00 00 00 exit

... which passed verification while the test itself expects a verification
failure.

Let us add 'barrier_var' style asm code in both places to prevent function
specialization which caused selftests failure.

  [1] llvm/llvm-project#72903

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20231127050342.1945270-1-yonghong.song@linux.dev
Signed-off-by: Sasha Levin <sashal@kernel.org>
@12D687 12D687 closed this as completed Jul 12, 2024
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@hahahahacker2009 @12D687