Buildresult: powerpc-fixes/ps3_defconfig/powerpc-gcc4.6 built on Feb 13 2020, 22:01

kisskb

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Status:	OK
Date/Time:	Feb 13 2020, 22:01
Duration:	0:01:42.021333
Builder:	ka2
Revision:	powerpc/tm: Fix clearing MSR[TS] in current when reclaiming on signal delivery (`cc43634c11b8ced6d99562d1e188e100c9e76e61)`
Target:	powerpc-fixes/ps3_defconfig/powerpc-gcc4.6
Branch:	powerpc-fixes
Compiler:	powerpc-gcc4.6 (powerpc-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:	ps3_defconfig (download)
Log:	Download original Possible warnings (19) warning: The last gc run reported the following. Please correct the root cause warning: There are too many unreachable loose objects; run 'git prune' to remove them. include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] ipc/shm.c:1712:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized] net/core/gen_stats.c:156:19: warning: 'seq' may be used uninitialized in this function [-Wuninitialized] net/core/dev.c:3597:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized] kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] lib/mpi/mpicoder.c:352:8: warning: 'buff' may be used uninitialized in this function [-Wuninitialized] fs/splice.c:1416:8: warning: 'type' may be used uninitialized in this function [-Wuninitialized] fs/splice.c:1390:8: warning: 'type' may be used uninitialized in this function [-Wuninitialized] drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] include/linux/rhashtable.h:110:10: warning: 'next' may be used uninitialized in this function [-Wuninitialized] net/bluetooth/hidp/core.c:1386:18: warning: 'session' may be used uninitialized in this function [-Wuninitialized] fs/cifs/smb2pdu.c:2816:19: warning: 'in_data_buf' may be used uninitialized in this function [-Wuninitialized] net/mac80211/tx.c:2551:27: warning: 'chanctx_conf' may be used uninitialized in this function [-Wuninitialized] net/wireless/nl80211.c:13147:33: warning: 'wdev' may be used uninitialized in this function [-Wuninitialized] net/wireless/nl80211.c:13117:21: warning: 'rdev' may be used uninitialized in this function [-Wuninitialized] net/mac80211/mlme.c:1576:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify cc43634c11b8ced6d99562d1e188e100c9e76e61^{commit} # git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git fixes-test warning: The last gc run reported the following. Please correct the root cause and remove .git/gc.log. Automatic cleanup will not be performed until the file is removed. warning: There are too many unreachable loose objects; run 'git prune' to remove them. # git rev-parse -q --verify cc43634c11b8ced6d99562d1e188e100c9e76e61^{commit} cc43634c11b8ced6d99562d1e188e100c9e76e61 # git checkout -q -f -B kisskb cc43634c11b8ced6d99562d1e188e100c9e76e61 # git clean -qxdf # < git log -1 # commit cc43634c11b8ced6d99562d1e188e100c9e76e61 # Author: Gustavo Luiz Duarte <gustavold@linux.ibm.com> # Date: Tue Feb 11 00:38:29 2020 -0300 # # powerpc/tm: Fix clearing MSR[TS] in current when reclaiming on signal delivery # # After a treclaim, we expect to be in non-transactional state. If we # don't clear the current thread's MSR[TS] before we get preempted, then # tm_recheckpoint_new_task() will recheckpoint and we get rescheduled in # suspended transaction state. # # When handling a signal caught in transactional state, # handle_rt_signal64() calls get_tm_stackpointer() that treclaims the # transaction using tm_reclaim_current() but without clearing the # thread's MSR[TS]. This can cause the TM Bad Thing exception below if # later we pagefault and get preempted trying to access the user's # sigframe, using __put_user(). Afterwards, when we are rescheduled back # into do_page_fault() (but now in suspended state since the thread's # MSR[TS] was not cleared), upon executing 'rfid' after completion of # the page fault handling, the exception is raised because a transition # from suspended to non-transactional state is invalid. # # Unexpected TM Bad Thing exception at c00000000000de44 (msr 0x8000000302a03031) tm_scratch=800000010280b033 # Oops: Unrecoverable exception, sig: 6 [#1] # LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries # Modules linked in: nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6_tables ip_tables nft_compat ip_set nf_tables nfnetlink xts vmx_crypto sg virtio_balloon # r_mod cdrom virtio_net net_failover virtio_blk virtio_scsi failover dm_mirror dm_region_hash dm_log dm_mod # CPU: 25 PID: 15547 Comm: a.out Not tainted 5.4.0-rc2 #32 # NIP: c00000000000de44 LR: c000000000034728 CTR: 0000000000000000 # REGS: c00000003fe7bd70 TRAP: 0700 Not tainted (5.4.0-rc2) # MSR: 8000000302a03031 <SF,VEC,VSX,FP,ME,IR,DR,LE,TM[SE]> CR: 44000884 XER: 00000000 # CFAR: c00000000000dda4 IRQMASK: 0 # PACATMSCRATCH: 800000010280b033 # GPR00: c000000000034728 c000000f65a17c80 c000000001662800 00007fffacf3fd78 # GPR04: 0000000000001000 0000000000001000 0000000000000000 c000000f611f8af0 # GPR08: 0000000000000000 0000000078006001 0000000000000000 000c000000000000 # GPR12: c000000f611f84b0 c00000003ffcb200 0000000000000000 0000000000000000 # GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 # GPR20: 0000000000000000 0000000000000000 0000000000000000 c000000f611f8140 # GPR24: 0000000000000000 00007fffacf3fd68 c000000f65a17d90 c000000f611f7800 # GPR28: c000000f65a17e90 c000000f65a17e90 c000000001685e18 00007fffacf3f000 # NIP [c00000000000de44] fast_exception_return+0xf4/0x1b0 # LR [c000000000034728] handle_rt_signal64+0x78/0xc50 # Call Trace: # [c000000f65a17c80] [c000000000034710] handle_rt_signal64+0x60/0xc50 (unreliable) # [c000000f65a17d30] [c000000000023640] do_notify_resume+0x330/0x460 # [c000000f65a17e20] [c00000000000dcc4] ret_from_except_lite+0x70/0x74 # Instruction dump: # 7c4ff120 e8410170 7c5a03a6 38400000 f8410060 e8010070 e8410080 e8610088 # 60000000 60000000 e8810090 e8210078 <4c000024> 48000000 e8610178 88ed0989 # ---[ end trace 93094aa44b442f87 ]--- # # The simplified sequence of events that triggers the above exception is: # # ... # userspace in NON-TRANSACTIONAL state # tbegin # userspace in TRANSACTIONAL state # signal delivery # kernelspace in SUSPENDED state # handle_rt_signal64() # get_tm_stackpointer() # treclaim # kernelspace in NON-TRANSACTIONAL state # __put_user() # page fault happens. We will never get back here because of the TM Bad Thing exception. # # page fault handling kicks in and we voluntarily preempt ourselves # do_page_fault() # __schedule() # __switch_to(other_task) # # our task is rescheduled and we recheckpoint because the thread's MSR[TS] was not cleared # __switch_to(our_task) # switch_to_tm() # tm_recheckpoint_new_task() # trechkpt # kernelspace in SUSPENDED state # # The page fault handling resumes, but now we are in suspended transaction state # do_page_fault() completes # rfid <----- trying to get back where the page fault happened (we were non-transactional back then) # TM Bad Thing # illegal transition from suspended to non-transactional # # This patch fixes that issue by clearing the current thread's MSR[TS] # just after treclaim in get_tm_stackpointer() so that we stay in # non-transactional state in case we are preempted. In order to make # treclaim and clearing the thread's MSR[TS] atomic from a preemption # perspective when CONFIG_PREEMPT is set, preempt_disable/enable() is # used. It's also necessary to save the previous value of the thread's # MSR before get_tm_stackpointer() is called so that it can be exposed # to the signal handler later in setup_tm_sigcontexts() to inform the # userspace MSR at the moment of the signal delivery. # # Found with tm-signal-context-force-tm kernel selftest. # # Fixes: 2b0a576d15e0 ("powerpc: Add new transactional memory state to the signal context") # Cc: stable@vger.kernel.org # v3.9 # Signed-off-by: Gustavo Luiz Duarte <gustavold@linux.ibm.com> # Acked-by: Michael Neuling <mikey@neuling.org> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20200211033831.11165-1-gustavold@linux.ibm.com # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 cc43634c11b8ced6d99562d1e188e100c9e76e61 # < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ps3_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- ps3_defconfig # make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ps3_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:72:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/ipc/shm.c: In function 'ksys_shmdt': /kisskb/src/ipc/shm.c:1712:59: warning: 'file' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/core/gen_stats.c: In function '__gnet_stats_copy_basic': /kisskb/src/net/core/gen_stats.c:156:19: warning: 'seq' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/core/dev.c: In function 'validate_xmit_skb_list': /kisskb/src/net/core/dev.c:3597:15: warning: 'tail' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char': /kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/mpi/mpicoder.c: In function 'mpi_read_raw_from_sgl': /kisskb/src/lib/mpi/mpicoder.c:352:8: warning: 'buff' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/splice.c: In function '__do_compat_sys_vmsplice': /kisskb/src/fs/splice.c:1416:8: warning: 'type' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/splice.c: In function '__do_sys_vmsplice': /kisskb/src/fs/splice.c:1390:8: warning: 'type' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/usb/core/devio.c: In function 'async_completed': /kisskb/src/drivers/usb/core/devio.c:625:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c: In function 'rht_deferred_worker': /kisskb/src/include/linux/rhashtable.h:110:10: warning: 'next' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/lib/rhashtable.c:222:28: note: 'next' was declared here /kisskb/src/net/bluetooth/hidp/core.c: In function 'hidp_connection_add': /kisskb/src/net/bluetooth/hidp/core.c:1386:18: warning: 'session' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/cifs/smb2pdu.c: In function 'SMB2_ioctl_init': /kisskb/src/fs/cifs/smb2pdu.c:2816:19: warning: 'in_data_buf' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/mac80211/tx.c: In function 'ieee80211_build_hdr': /kisskb/src/net/mac80211/tx.c:2551:27: warning: 'chanctx_conf' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/wireless/nl80211.c: In function 'nl80211_vendor_cmd_dump': /kisskb/src/net/wireless/nl80211.c:13147:33: warning: 'wdev' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/wireless/nl80211.c:13117:21: warning: 'rdev' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/mac80211/mlme.c: In function 'ieee80211_rx_mgmt_beacon': /kisskb/src/net/mac80211/mlme.c:1576:3: warning: 'pwr_level_cisco' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/net/mac80211/mlme.c:1533:6: note: 'pwr_level_cisco' was declared here Completed OK # rm -rf /kisskb/build/powerpc-fixes_ps3_defconfig_powerpc-gcc4.6 # Build took: 0:01:42.021333

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