Hi Leon, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Leon-Hwang/bpf-Prevent-tailcall-infinite-loop-caused-by-freplace/20241006-210309 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20241006130130.77125-2-leon.hwang%40linux.dev patch subject: [PATCH bpf-next v5 1/3] bpf: Prevent tailcall infinite loop caused by freplace config: powerpc64-randconfig-r071-20241008 (https://download.01.org/0day-ci/archive/20241008/202410080522.O8nxCK2v-lkp@xxxxxxxxx/config) compiler: powerpc64-linux-gcc (GCC) 14.1.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241008/202410080522.O8nxCK2v-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202410080522.O8nxCK2v-lkp@xxxxxxxxx/ All error/warnings (new ones prefixed by >>): In file included from include/linux/security.h:35, from include/linux/perf_event.h:62, from include/linux/trace_events.h:10, from include/trace/syscall.h:7, from include/linux/syscalls.h:93, from init/main.c:21: >> include/linux/bpf.h:1392:5: warning: no previous prototype for 'bpf_extension_link_prog' [-Wmissing-prototypes] 1392 | int bpf_extension_link_prog(struct bpf_tramp_link *link, | ^~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/bpf.h:1398:5: warning: no previous prototype for 'bpf_extension_unlink_prog' [-Wmissing-prototypes] 1398 | int bpf_extension_unlink_prog(struct bpf_tramp_link *link, | ^~~~~~~~~~~~~~~~~~~~~~~~~ -- In file included from include/linux/security.h:35, from include/linux/perf_event.h:62, from include/linux/trace_events.h:10, from include/trace/trace_events.h:21, from include/trace/define_trace.h:102, from include/trace/events/workqueue.h:132, from kernel/workqueue.c:531: >> include/linux/bpf.h:1392:5: warning: no previous prototype for 'bpf_extension_link_prog' [-Wmissing-prototypes] 1392 | int bpf_extension_link_prog(struct bpf_tramp_link *link, | ^~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/bpf.h:1398:5: warning: no previous prototype for 'bpf_extension_unlink_prog' [-Wmissing-prototypes] 1398 | int bpf_extension_unlink_prog(struct bpf_tramp_link *link, | ^~~~~~~~~~~~~~~~~~~~~~~~~ kernel/workqueue.c: In function '__alloc_workqueue': kernel/workqueue.c:5665:9: warning: function '__alloc_workqueue' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 5665 | name_len = vsnprintf(wq->name, sizeof(wq->name), fmt, args); | ^~~~~~~~ -- In file included from include/linux/security.h:35, from include/net/scm.h:9, from include/linux/netlink.h:9, from include/uapi/linux/neighbour.h:6, from include/linux/netdevice.h:44, from include/net/sock.h:46, from include/linux/tcp.h:19, from include/linux/ipv6.h:102, from include/net/addrconf.h:65, from lib/vsprintf.c:41: >> include/linux/bpf.h:1392:5: warning: no previous prototype for 'bpf_extension_link_prog' [-Wmissing-prototypes] 1392 | int bpf_extension_link_prog(struct bpf_tramp_link *link, | ^~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/bpf.h:1398:5: warning: no previous prototype for 'bpf_extension_unlink_prog' [-Wmissing-prototypes] 1398 | int bpf_extension_unlink_prog(struct bpf_tramp_link *link, | ^~~~~~~~~~~~~~~~~~~~~~~~~ lib/vsprintf.c: In function 'va_format': lib/vsprintf.c:1683:9: warning: function 'va_format' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format] 1683 | buf += vsnprintf(buf, end > buf ? end - buf : 0, va_fmt->fmt, va); | ^~~ -- In file included from include/linux/security.h:35, from include/linux/perf_event.h:62, from include/linux/trace_events.h:10, from include/trace/syscall.h:7, from include/linux/syscalls.h:93, from kernel/time/hrtimer.c:30: >> include/linux/bpf.h:1392:5: warning: no previous prototype for 'bpf_extension_link_prog' [-Wmissing-prototypes] 1392 | int bpf_extension_link_prog(struct bpf_tramp_link *link, | ^~~~~~~~~~~~~~~~~~~~~~~ >> include/linux/bpf.h:1398:5: warning: no previous prototype for 'bpf_extension_unlink_prog' [-Wmissing-prototypes] 1398 | int bpf_extension_unlink_prog(struct bpf_tramp_link *link, | ^~~~~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:121:35: warning: initialized field overwritten [-Woverride-init] 121 | [CLOCK_REALTIME] = HRTIMER_BASE_REALTIME, | ^~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:121:35: note: (near initialization for 'hrtimer_clock_to_base_table[0]') kernel/time/hrtimer.c:122:35: warning: initialized field overwritten [-Woverride-init] 122 | [CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC, | ^~~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:122:35: note: (near initialization for 'hrtimer_clock_to_base_table[1]') kernel/time/hrtimer.c:123:35: warning: initialized field overwritten [-Woverride-init] 123 | [CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME, | ^~~~~~~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:123:35: note: (near initialization for 'hrtimer_clock_to_base_table[7]') kernel/time/hrtimer.c:124:35: warning: initialized field overwritten [-Woverride-init] 124 | [CLOCK_TAI] = HRTIMER_BASE_TAI, | ^~~~~~~~~~~~~~~~ kernel/time/hrtimer.c:124:35: note: (near initialization for 'hrtimer_clock_to_base_table[11]') -- powerpc64-linux-ld: drivers/char/tpm/eventlog/tpm1.o: in function `bpf_extension_link_prog': >> tpm1.c:(.text+0x494): multiple definition of `bpf_extension_link_prog'; drivers/char/tpm/eventlog/common.o:common.c:(.text+0x130): first defined here powerpc64-linux-ld: drivers/char/tpm/eventlog/tpm1.o: in function `bpf_extension_unlink_prog': >> tpm1.c:(.text+0x4a4): multiple definition of `bpf_extension_unlink_prog'; drivers/char/tpm/eventlog/common.o:common.c:(.text+0x140): first defined here powerpc64-linux-ld: drivers/char/tpm/eventlog/tpm2.o: in function `bpf_extension_link_prog': tpm2.c:(.text+0x3d0): multiple definition of `bpf_extension_link_prog'; drivers/char/tpm/eventlog/common.o:common.c:(.text+0x130): first defined here powerpc64-linux-ld: drivers/char/tpm/eventlog/tpm2.o: in function `bpf_extension_unlink_prog': tpm2.c:(.text+0x3e0): multiple definition of `bpf_extension_unlink_prog'; drivers/char/tpm/eventlog/common.o:common.c:(.text+0x140): first defined here -- powerpc64-linux-ld: drivers/i2c/i2c-core-smbus.o: in function `bpf_extension_link_prog': >> i2c-core-smbus.c:(.text+0x1d40): multiple definition of `bpf_extension_link_prog'; drivers/i2c/i2c-core-base.o:i2c-core-base.c:(.text+0x3e60): first defined here powerpc64-linux-ld: drivers/i2c/i2c-core-smbus.o: in function `bpf_extension_unlink_prog': >> i2c-core-smbus.c:(.text+0x1d50): multiple definition of `bpf_extension_unlink_prog'; drivers/i2c/i2c-core-base.o:i2c-core-base.c:(.text+0x3e70): first defined here powerpc64-linux-ld: drivers/i2c/i2c-core-slave.o: in function `bpf_extension_link_prog': i2c-core-slave.c:(.text+0x73c): multiple definition of `bpf_extension_link_prog'; drivers/i2c/i2c-core-base.o:i2c-core-base.c:(.text+0x3e60): first defined here powerpc64-linux-ld: drivers/i2c/i2c-core-slave.o: in function `bpf_extension_unlink_prog': i2c-core-slave.c:(.text+0x74c): multiple definition of `bpf_extension_unlink_prog'; drivers/i2c/i2c-core-base.o:i2c-core-base.c:(.text+0x3e70): first defined here -- powerpc64-linux-ld: drivers/scsi/snic/snic_main.o: in function `bpf_extension_link_prog': >> snic_main.c:(.text+0x234): multiple definition of `bpf_extension_link_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1d4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_main.o: in function `bpf_extension_unlink_prog': >> snic_main.c:(.text+0x244): multiple definition of `bpf_extension_unlink_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1e4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_res.o: in function `bpf_extension_link_prog': snic_res.c:(.text+0x0): multiple definition of `bpf_extension_link_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1d4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_res.o: in function `bpf_extension_unlink_prog': snic_res.c:(.text+0x10): multiple definition of `bpf_extension_unlink_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1e4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_isr.o: in function `bpf_extension_link_prog': snic_isr.c:(.text+0x1ec): multiple definition of `bpf_extension_link_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1d4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_isr.o: in function `bpf_extension_unlink_prog': snic_isr.c:(.text+0x1fc): multiple definition of `bpf_extension_unlink_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1e4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_ctl.o: in function `bpf_extension_link_prog': snic_ctl.c:(.text+0x0): multiple definition of `bpf_extension_link_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1d4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_ctl.o: in function `bpf_extension_unlink_prog': snic_ctl.c:(.text+0x10): multiple definition of `bpf_extension_unlink_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1e4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_io.o: in function `bpf_extension_link_prog': snic_io.c:(.text+0x310): multiple definition of `bpf_extension_link_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1d4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_io.o: in function `bpf_extension_unlink_prog': snic_io.c:(.text+0x320): multiple definition of `bpf_extension_unlink_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1e4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_scsi.o: in function `bpf_extension_link_prog': snic_scsi.c:(.text+0x3dfc): multiple definition of `bpf_extension_link_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1d4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_scsi.o: in function `bpf_extension_unlink_prog': snic_scsi.c:(.text+0x3e0c): multiple definition of `bpf_extension_unlink_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1e4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_disc.o: in function `bpf_extension_link_prog': snic_disc.c:(.text+0xbf8): multiple definition of `bpf_extension_link_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1d4): first defined here powerpc64-linux-ld: drivers/scsi/snic/snic_disc.o: in function `bpf_extension_unlink_prog': snic_disc.c:(.text+0xc08): multiple definition of `bpf_extension_unlink_prog'; drivers/scsi/snic/snic_attrs.o:snic_attrs.c:(.text+0x1e4): first defined here -- powerpc64-linux-ld: fs/ext2/xattr.o: in function `bpf_extension_link_prog': >> xattr.c:(.text+0xd24): multiple definition of `bpf_extension_link_prog'; fs/ext2/trace.o:trace.c:(.text+0x7c0): first defined here powerpc64-linux-ld: fs/ext2/xattr.o: in function `bpf_extension_unlink_prog': >> xattr.c:(.text+0xd34): multiple definition of `bpf_extension_unlink_prog'; fs/ext2/trace.o:trace.c:(.text+0x7d0): first defined here powerpc64-linux-ld: fs/ext2/xattr_security.o: in function `bpf_extension_link_prog': xattr_security.c:(.text+0xdc): multiple definition of `bpf_extension_link_prog'; fs/ext2/trace.o:trace.c:(.text+0x7c0): first defined here powerpc64-linux-ld: fs/ext2/xattr_security.o: in function `bpf_extension_unlink_prog': xattr_security.c:(.text+0xec): multiple definition of `bpf_extension_unlink_prog'; fs/ext2/trace.o:trace.c:(.text+0x7d0): first defined here -- powerpc64-linux-ld: drivers/nvdimm/bus.o: in function `bpf_extension_link_prog': >> bus.c:(.text+0x1384): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/bus.o: in function `bpf_extension_unlink_prog': >> bus.c:(.text+0x1394): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/dimm_devs.o: in function `bpf_extension_link_prog': dimm_devs.c:(.text+0x12c0): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/dimm_devs.o: in function `bpf_extension_unlink_prog': dimm_devs.c:(.text+0x12d0): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/dimm.o: in function `bpf_extension_link_prog': dimm.c:(.text+0x2d0): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/dimm.o: in function `bpf_extension_unlink_prog': dimm.c:(.text+0x2e0): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/region_devs.o: in function `bpf_extension_link_prog': region_devs.c:(.text+0x1388): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/region_devs.o: in function `bpf_extension_unlink_prog': region_devs.c:(.text+0x1398): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/region.o: in function `bpf_extension_link_prog': region.c:(.text+0x3d4): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/region.o: in function `bpf_extension_unlink_prog': region.c:(.text+0x3e4): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/namespace_devs.o: in function `bpf_extension_link_prog': namespace_devs.c:(.text+0x2efc): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/namespace_devs.o: in function `bpf_extension_unlink_prog': namespace_devs.c:(.text+0x2f0c): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/label.o: in function `bpf_extension_link_prog': label.c:(.text+0x324): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/label.o: in function `bpf_extension_unlink_prog': label.c:(.text+0x334): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/badrange.o: in function `bpf_extension_link_prog': badrange.c:(.text+0x674): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/badrange.o: in function `bpf_extension_unlink_prog': badrange.c:(.text+0x684): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/claim.o: in function `bpf_extension_link_prog': claim.c:(.text+0x380): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/claim.o: in function `bpf_extension_unlink_prog': claim.c:(.text+0x390): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/btt_devs.o: in function `bpf_extension_link_prog': btt_devs.c:(.text+0xb24): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/btt_devs.o: in function `bpf_extension_unlink_prog': btt_devs.c:(.text+0xb34): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here powerpc64-linux-ld: drivers/nvdimm/security.o: in function `bpf_extension_link_prog': security.c:(.text+0x4c0): multiple definition of `bpf_extension_link_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe48): first defined here powerpc64-linux-ld: drivers/nvdimm/security.o: in function `bpf_extension_unlink_prog': security.c:(.text+0x4d0): multiple definition of `bpf_extension_unlink_prog'; drivers/nvdimm/core.o:core.c:(.text+0xe58): first defined here -- powerpc64-linux-ld: drivers/pcmcia/cistpl.o: in function `bpf_extension_link_prog': >> cistpl.c:(.text+0x1430): multiple definition of `bpf_extension_link_prog'; drivers/pcmcia/pcmcia_resource.o:pcmcia_resource.c:(.text+0xec0): first defined here powerpc64-linux-ld: drivers/pcmcia/cistpl.o: in function `bpf_extension_unlink_prog': >> cistpl.c:(.text+0x1440): multiple definition of `bpf_extension_unlink_prog'; drivers/pcmcia/pcmcia_resource.o:pcmcia_resource.c:(.text+0xed0): first defined here powerpc64-linux-ld: drivers/pcmcia/pcmcia_cis.o: in function `bpf_extension_link_prog': pcmcia_cis.c:(.text+0x718): multiple definition of `bpf_extension_link_prog'; drivers/pcmcia/pcmcia_resource.o:pcmcia_resource.c:(.text+0xec0): first defined here powerpc64-linux-ld: drivers/pcmcia/pcmcia_cis.o: in function `bpf_extension_unlink_prog': pcmcia_cis.c:(.text+0x728): multiple definition of `bpf_extension_unlink_prog'; drivers/pcmcia/pcmcia_resource.o:pcmcia_resource.c:(.text+0xed0): first defined here -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
