On Fri, Mar 28, 2025 at 01:40:44PM -0400, trondmy@xxxxxxxxxx wrote:
> From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
>
> Once a task calls exit_signals() it can no longer be signalled. So do
> not allow it to do killable waits.
We're seeing the LTP acct02 test failing in kernels with this patch
applied, testing on systems with NFS root filesystems:
10271 05:03:09.064993 tst_test.c:1900: TINFO: LTP version: 20250130-1-g60fe84aaf
10272 05:03:09.076425 tst_test.c:1904: TINFO: Tested kernel: 6.15.0-rc1 #1 SMP PREEMPT Sun Apr 6 21:18:14 UTC 2025 aarch64
10273 05:03:09.076733 tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
10274 05:03:09.087803 tst_test.c:1722: TINFO: Overall timeout per run is 0h 01m 30s
10275 05:03:09.088107 tst_kconfig.c:88: TINFO: Parsing kernel config '/proc/config.gz'
10276 05:03:09.093097 acct02.c:63: TINFO: CONFIG_BSD_PROCESS_ACCT_V3=y
10277 05:03:09.093400 acct02.c:240: TINFO: Verifying using 'struct acct_v3'
10278 05:03:10.053504 <6>[ 98.043143] Process accounting resumed
10279 05:03:10.053935 <6>[ 98.043143] Process accounting resumed
10280 05:03:10.064653 acct02.c:193: TINFO: == entry 1 ==
10281 05:03:10.064953 acct02.c:84: TINFO: ac_comm != 'acct02_helper' ('acct02')
10282 05:03:10.076029 acct02.c:133: TINFO: ac_exitcode != 32768 (0)
10283 05:03:10.076331 acct02.c:141: TINFO: ac_ppid != 2466 (2461)
10284 05:03:10.076572 acct02.c:183: TFAIL: end of file reached
10285 05:03:10.076790
10286 05:03:10.087439 HINT: You _MAY_ be missing kernel fixes:
10287 05:03:10.087741
10288 05:03:10.087979 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4d9570158b626
10289 05:03:10.088201
10290 05:03:10.088414 Summary:
10291 05:03:10.088618 passed 0
10292 05:03:10.098852 failed 1
10293 05:03:10.099212 broken 0
10294 05:03:10.099454 skipped 0
10295 05:03:10.099675 warnings 0
I ran a bisect which zeroed in on this commit (log below), I didn't look
into it properly but the test does start and exit a test program to
verify that accounting records get created properly which does look
relevant.
git bisect start
# status: waiting for both good and bad commits
# bad: [0af2f6be1b4281385b618cb86ad946eded089ac8] Linux 6.15-rc1
git bisect bad 0af2f6be1b4281385b618cb86ad946eded089ac8
# status: waiting for good commit(s), bad commit known
# good: [38fec10eb60d687e30c8c6b5420d86e8149f7557] Linux 6.14
git bisect good 38fec10eb60d687e30c8c6b5420d86e8149f7557
# good: [fd71def6d9abc5ae362fb9995d46049b7b0ed391] Merge tag 'for-6.15-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
git bisect good fd71def6d9abc5ae362fb9995d46049b7b0ed391
# good: [93d52288679e29aaa44a6f12d5a02e8a90e742c5] Merge tag 'backlight-next-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight
git bisect good 93d52288679e29aaa44a6f12d5a02e8a90e742c5
# good: [2cd5769fb0b78b8ef583ab4c0015c2c48d525dac] Merge tag 'driver-core-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
git bisect good 2cd5769fb0b78b8ef583ab4c0015c2c48d525dac
# bad: [25757984d77da731922bed5001431673b6daf5ac] Merge tag 'staging-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
git bisect bad 25757984d77da731922bed5001431673b6daf5ac
# good: [28a1b05678f4e88de90b0987b06e13c454ad9bd6] Merge tag 'i2c-for-6.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
git bisect good 28a1b05678f4e88de90b0987b06e13c454ad9bd6
# good: [92b71befc349587d58fdbbe6cdd68fb67f4933a8] Merge tag 'objtool-urgent-2025-04-01' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 92b71befc349587d58fdbbe6cdd68fb67f4933a8
# good: [5e17b5c71729d8ce936c83a579ed45f65efcb456] Merge tag 'fuse-update-6.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
git bisect good 5e17b5c71729d8ce936c83a579ed45f65efcb456
# good: [344a50b0f4eecc160c61d780f53d2f75586016ce] staging: gpib: lpvo_usb_gpib: struct gpib_board
git bisect good 344a50b0f4eecc160c61d780f53d2f75586016ce
# bad: [9e8f324bd44c1fe026b582b75213de4eccfa1163] NFSv4: Check for delegation validity in nfs_start_delegation_return_locked()
git bisect bad 9e8f324bd44c1fe026b582b75213de4eccfa1163
# good: [df210d9b0951d714c1668c511ca5c8ff38cf6916] sunrpc: Add a sysfs file for adding a new xprt
git bisect good df210d9b0951d714c1668c511ca5c8ff38cf6916
# good: [bf9be373b830a3e48117da5d89bb6145a575f880] SUNRPC: rpc_clnt_set_transport() must not change the autobind setting
git bisect good bf9be373b830a3e48117da5d89bb6145a575f880
# good: [c81d5bcb7b38ab0322aea93152c091451b82d3f3] NFSv4: clp->cl_cons_state < 0 signifies an invalid nfs_client
git bisect good c81d5bcb7b38ab0322aea93152c091451b82d3f3
# bad: [14e41b16e8cb677bb440dca2edba8b041646c742] SUNRPC: Don't allow waiting for exiting tasks
git bisect bad 14e41b16e8cb677bb440dca2edba8b041646c742
# good: [0af5fb5ed3d2fd9e110c6112271f022b744a849a] NFSv4: Treat ENETUNREACH errors as fatal for state recovery
git bisect good 0af5fb5ed3d2fd9e110c6112271f022b744a849a
# first bad commit: [14e41b16e8cb677bb440dca2edba8b041646c742] SUNRPC: Don't allow waiting for exiting tasks
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