FUJITA Tomonori schrieb: > On Tue, 21 Oct 2008 14:15:57 +0200 > Tomasz Chmielewski <mangoo at wpkg.org> wrote: > >> FUJITA Tomonori schrieb: >> >>>>>> # tgtadm --op delete --mode conn --tid 2 --sid 2 --cid 0 >>>>>> Segmentation fault >>>>>> >>>>>> If a segfault does not happen immediately, start all these commands >>>>>> again (or, generally, "tgtadm --op delete --mode conn --tid 2 --sid 1 >>>>>> --cid 0" is enough). >>>>>> >>>>>> For me, on x86, segfault happens in 90% of cases. Sometimes, the >>>>>> connection is eventually deleted. >>> I tried the above commands three times on x86 but I can't reproduce >>> this problem. >> It is easier when there is some traffic to the target. >> >> >>> Can you use gdb to find where tgtadm crashes? >> Sure. >> Here is strace output, but it doesn't say much, does it? I'll try to get more data with gdb. >> >> execve("/usr/sbin/tgtadm", ["tgtadm", "--op", "delete", "--mode", "conn", "--tid", "1", "--sid", "1", "--cid", "0"], [/* 20 vars */]) = 0 >> uname({sys="Linux", node="megathecus", ...}) = 0 >> brk(0) = 0x804d000 >> access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) >> mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6feee000 >> access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) >> open("/etc/ld.so.cache", O_RDONLY) = 3 >> fstat64(3, {st_mode=S_IFREG|0644, st_size=16095, ...}) = 0 >> mmap2(NULL, 16095, PROT_READ, MAP_PRIVATE, 3, 0) = 0x6feea000 >> close(3) = 0 >> access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) >> open("/lib/tls/libc.so.6", O_RDONLY) = 3 >> read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\240O\1"..., 512) = 512 >> fstat64(3, {st_mode=S_IFREG|0644, st_size=1245488, ...}) = 0 >> mmap2(NULL, 1251484, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x6fdb8000 >> mmap2(0x6fee0000, 28672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x128) = 0x6fee0000 >> mmap2(0x6fee7000, 10396, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x6fee7000 >> close(3) = 0 >> mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6fdb7000 >> mprotect(0x6fee0000, 20480, PROT_READ) = 0 >> set_thread_area({entry_number:-1 -> 6, base_addr:0x6fdb78e0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0,useable:1}) = 0 >> munmap(0x6feea000, 16095) = 0 >> brk(0) = 0x804d000 >> brk(0x8070000) = 0x8070000 >> socket(PF_FILE, SOCK_STREAM, 0) = 3 >> connect(3, {sa_family=AF_FILE, path=@TGT_IPC_ABSTRACT_NAMESPACE}, 110) = 0 >> write(3, "\4\0\0\0\1\0\0\0iscsi\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 116) = 116 >> read(3, "", 8) = 0 >> --- SIGSEGV (Segmentation fault) @ 0 (0) --- >> +++ killed by SIGSEGV +++ >> Process 5131 detached > > This helps? At least it does not crash any more ;) But it loops endlessly. execve("/usr/sbin/tgtadm", ["tgtadm", "--op", "delete", "--mode", "conn", "--tid", "1", "--sid", "1", "--cid", "0"], [/* 20 vars */]) = 0 uname({sys="Linux", node="megathecus", ...}) = 0 brk(0) = 0x804d000 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6ffb7000 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory) open("/etc/ld.so.cache", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=16095, ...}) = 0 mmap2(NULL, 16095, PROT_READ, MAP_PRIVATE, 3, 0) = 0x6ffb3000 close(3) = 0 access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or directory) open("/lib/tls/libc.so.6", O_RDONLY) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\240O\1"..., 512) = 512 fstat64(3, {st_mode=S_IFREG|0644, st_size=1245488, ...}) = 0 mmap2(NULL, 1251484, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x6fe81000 mmap2(0x6ffa9000, 28672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x128) = 0x6ffa9000 mmap2(0x6ffb0000, 10396, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x6ffb0000 close(3) = 0 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6fe80000 mprotect(0x6ffa9000, 20480, PROT_READ) = 0 set_thread_area({entry_number:-1 -> 6, base_addr:0x6fe808e0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0 munmap(0x6ffb3000, 16095) = 0 brk(0) = 0x804d000 brk(0x8070000) = 0x8070000 socket(PF_FILE, SOCK_STREAM, 0) = 3 connect(3, {sa_family=AF_FILE, path=@TGT_IPC_ABSTRACT_NAMESPACE}, 110) = 0 write(3, "\4\0\0\0\1\0\0\0iscsi\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 116) = 116 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 recv(3, "", 8, MSG_WAITALL) = 0 (...) And it repeats "recv(3, "", 8, MSG_WAITALL) = 0" all the time. -- Tomasz Chmielewski http://wpkg.org -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo at vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html |