[Xen-devel] Xen pv kernel (2.6.30) causes s2ram to crash with segmentation fault

[Tom Rotenberg <tom.rotenberg@xxxxxxxxx>]

Hi,

I have been testing the new 2.6.30 kernel, which comes with the xen
unstable, and i have found that it causes the 's2ram -f -m' to crash
with a segmentation fault.
Here are my test results:
1. When booting the 2.6.30 kernel, without Xen, then s2ram works
perfect (!) (it goes to sleep and returns perfect!)
2. When booting the 2.6.30 kernel with Xen, then when i try to run
's2ram -f -m', i get the following result:

dell-e6400:~# s2ram -f -m
Calling get_mode
Segmentation fault


I am using a Dell e6400 machine.

Can someone please help me with this? Jeremy - do u know why does this
problem occurs?

If you are interested, here are the results of strace, on that command:

dell-igd:~# strace s2ram -f -m
execve("/usr/sbin/s2ram", ["s2ram", "-f", "-m"], [/* 18 vars */]) = 0
brk(0)                                  = 0x20c1000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f65458cd000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f65458cb000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=31573, ...}) = 0
mmap(NULL, 31573, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f65458c3000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/libx86.so.1", O_RDONLY)      = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0pw\0\0\0\0\0\0@"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=137000, ...}) = 0
mmap(NULL, 2235424, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x7f6545491000
mprotect(0x7f65454b1000, 2093056, PROT_NONE) = 0
mmap(0x7f65456b0000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1f000) = 0x7f65456b0000
mmap(0x7f65456b2000, 3104, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f65456b2000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/usr/lib/libpci.so.3", O_RDONLY)  = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\0\"\0\0\0\0\0\0@"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=42168, ...}) = 0
mmap(NULL, 2137400, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x7f6545287000
mprotect(0x7f6545291000, 2093056, PROT_NONE) = 0
mmap(0x7f6545490000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x9000) = 0x7f6545490000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, 
"\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300\342\1\0\0\0\0\0@"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=1375536, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f65458c2000
mmap(NULL, 3482232, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x7f6544f34000
mprotect(0x7f654507e000, 2093056, PROT_NONE) = 0
mmap(0x7f654527d000, 20480, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x149000) = 0x7f654527d000
mmap(0x7f6545282000, 17016, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f6545282000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/usr/lib/libz.so.1", O_RDONLY)    = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@!\0\0\0\0\0\0@"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=93504, ...}) = 0
mmap(NULL, 2188616, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x7f6544d1d000
mprotect(0x7f6544d33000, 2097152, PROT_NONE) = 0
mmap(0x7f6544f33000, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x16000) = 0x7f6544f33000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/libresolv.so.2", O_RDONLY)   = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\00003\0\0\0\0\0\0@"...,
832) = 832
fstat(3, {st_mode=S_IFREG|0644, st_size=72568, ...}) = 0
mmap(NULL, 2177800, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x7f6544b09000
mprotect(0x7f6544b19000, 2097152, PROT_NONE) = 0
mmap(0x7f6544d19000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x10000) = 0x7f6544d19000
mmap(0x7f6544d1b000, 6920, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f6544d1b000
close(3)                                = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f65458c1000
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f65458c0000
arch_prctl(ARCH_SET_FS, 0x7f65458c06e0) = 0
mprotect(0x7f654527d000, 12288, PROT_READ) = 0
munmap(0x7f65458c3000, 31573)           = 0
open("/dev/zero", O_RDWR)               = 3
mmap(0x1000, 655360, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_SHARED|MAP_FIXED, 3, 0) = 0x1000
close(3)                                = 0
open("/dev/mem", O_RDWR)                = 3
mmap(NULL, 1282, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_SHARED|MAP_FIXED, 3, 0) = 0
mmap(0xa0000, 393216, PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_SHARED|MAP_FIXED, 3, 0xa0000) = 0xa0000
close(3)                                = 0
ioperm(0, 0x400, 0x1)                   = 0
iopl(0x3)                               = 0
brk(0)                                  = 0x20c1000
brk(0x20e2000)                          = 0x20e2000
access("/sys/bus/pci", R_OK)            = 0
fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 0), ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x7f65458ca000
write(1, "Calling get_mode\n"..., 17Calling get_mode
)   = 17
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++

Tom

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