[Bug 11751] chrt Segmentation fault

bugzilla at busybox.net bugzilla at busybox.net
Fri Apr 5 14:04:53 UTC 2019


https://bugs.busybox.net/show_bug.cgi?id=11751

--- Comment #2 from Bin Zhang <yangtze31 at gmail.com> ---
# pidof mpd
142
# cat /proc/146/stat
stat    statm   status
# cat /proc/146/status 
Name:   output:Interfac
Umask:  0022
State:  S (sleeping)
Tgid:   142
Ngid:   0
Pid:    146

# chrt -p 146
Segmentation fault

# strace chrt -p 146
execve("/usr/bin/chrt", ["chrt", "-p", "146"], 0xffffd7c4b5e0 /* 14 vars */) =
0
brk(NULL)                               = 0x24016000
faccessat(AT_FDCWD, "/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such
file or directory)
openat(AT_FDCWD, "/lib64/tls/aarch64/libresolv.so.2", O_RDONLY|O_CLOEXEC) = -1
ENOENT (No such file or directory)
newfstatat(AT_FDCWD, "/lib64/tls/aarch64", 0xffffdb428560, 0) = -1 ENOENT (No
such file or directory)
openat(AT_FDCWD, "/lib64/tls/libresolv.so.2", O_RDONLY|O_CLOEXEC) = -1 ENOENT
(No such file or directory)
newfstatat(AT_FDCWD, "/lib64/tls", 0xffffdb428560, 0) = -1 ENOENT (No such file
or directory)
openat(AT_FDCWD, "/lib64/aarch64/libresolv.so.2", O_RDONLY|O_CLOEXEC) = -1
ENOENT (No such file or directory)
newfstatat(AT_FDCWD, "/lib64/aarch64", 0xffffdb428560, 0) = -1 ENOENT (No such
file or directory)
openat(AT_FDCWD, "/lib64/libresolv.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\3207\0\0\0\0\0\0"..., 832) =
832
fstat(3, {st_mode=S_IFREG|0755, st_size=80392, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xffffa5f44000
mmap(NULL, 154072, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xffffa5ef3000
mprotect(0xffffa5f05000, 65536, PROT_NONE) = 0
mmap(0xffffa5f15000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x12000) = 0xffffa5f15000
mmap(0xffffa5f17000, 6616, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffffa5f17000
close(3)                                = 0
openat(AT_FDCWD, "/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3,
"\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0\267\0\1\0\0\0\360\r\2\0\0\0\0\0"..., 832)
= 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1414752, ...}) = 0
mmap(NULL, 1486920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
0xffffa5d87000
mprotect(0xffffa5eda000, 61440, PROT_NONE) = 0
mmap(0xffffa5ee9000, 24576, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x152000) = 0xffffa5ee9000
mmap(0xffffa5eef000, 12360, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xffffa5eef000
close(3)                                = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0xffffa5f42000
mprotect(0xffffa5ee9000, 16384, PROT_READ) = 0
mprotect(0xffffa5f15000, 4096, PROT_READ) = 0
mprotect(0x472000, 4096, PROT_READ)     = 0
mprotect(0xffffa5f48000, 4096, PROT_READ) = 0
sched_getscheduler(146)                 = 1073741825
fstat(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(0x88, 0), ...}) = 0
brk(NULL)                               = 0x24016000
brk(0x24037000)                         = 0x24037000
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x30045e133} ---
+++ killed by SIGSEGV +++
Segmentation fault

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