Bug 15812
| Summary: | utsname.domainname not set in x86_32 processes (causing "YPBINDPROC_DOMAIN: domain not bound" errors) | ||
|---|---|---|---|
| Product: | Platform Specific/Hardware | Reporter: | adi |
| Component: | x86-64 | Assignee: | platform_x86_64 (platform_x86_64) |
| Status: | CLOSED CODE_FIX | ||
| Severity: | normal | CC: | akpm, hch, maciej.rutecki, rjw |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.34-rc4 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 15310 | ||
On Mon, 19 Apr 2010 21:29:15 GMT bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=15812 > > Summary: utsname.domainname not set in x86_32 processes > (causing "YPBINDPROC_DOMAIN: domain not bound" errors) > Product: Platform Specific/Hardware > Version: 2.5 > Kernel Version: 2.6.34-rc4 > Platform: All > OS/Version: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: x86-64 > AssignedTo: platform_x86_64@kernel-bugs.osdl.org > ReportedBy: adi@hexapodia.org > CC: hch@lst.de > Regression: Yes > > > 2.6.34-rc4 uname(2) from a x86_32 process copies out 325 bytes rather than > the > 390 bytes that 2.6.31 copied out (and that userland expects): Just to clarify (?), that's a 32-bit process on a 64-bit kernel, right? > 2.6.31.12% cat foo.c > main() > { > char buf[1000]; > memset(buf, 'x', sizeof(buf)); > uname(buf); > write(1, buf, sizeof(buf)); > return 0; > } > 2.6.31.12% i686-linux-gcc foo.c > 2.6.31.12% ./a.out | hd > 00000000 4c 69 6e 75 78 00 00 00 00 00 00 00 00 00 00 00 > |Linux...........| > 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > * > 00000040 00 63 76 70 65 34 33 30 30 00 00 00 00 00 00 00 > |.cvpe4300.......| > 00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > * > 00000080 00 00 32 2e 36 2e 33 31 2e 31 32 2d 63 76 70 32 > |..2.6.31.12-cvp2| > 00000090 30 31 30 30 33 32 39 2d 30 30 31 34 38 2d 67 39 > |0100329-00148-g9| > 000000a0 61 38 62 36 36 61 00 00 00 00 00 00 00 00 00 00 > |a8b66a..........| > 000000b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > 000000c0 00 00 00 23 36 20 53 4d 50 20 54 75 65 20 41 70 |...#6 SMP Tue > Ap| > 000000d0 72 20 36 20 31 36 3a 30 33 3a 33 31 20 50 44 54 |r 6 16:03:31 > PDT| > 000000e0 20 32 30 31 30 00 00 00 00 00 00 00 00 00 00 00 | > 2010...........| > 000000f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > 00000100 00 00 00 00 78 38 36 5f 36 34 00 00 00 00 00 00 > |....x86_64......| > 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > * > 00000140 00 00 00 00 00 28 6e 6f 6e 65 29 00 00 00 00 00 > |.....(none).....| > 00000150 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > * > 00000180 00 00 00 00 00 00 78 78 78 78 78 78 78 78 78 78 > |......xxxxxxxxxx| > 00000190 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 > |xxxxxxxxxxxxxxxx| > * > 000003e0 78 78 78 78 78 78 78 78 |xxxxxxxx| > 000003e8 > > 2.6.34-rc4% ./a.out | hd > 00000000 4c 69 6e 75 78 00 00 00 00 00 00 00 00 00 00 00 > |Linux...........| > 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > * > 00000040 00 63 76 70 2d 6c 6f 61 6e 65 72 2d 31 36 00 00 > |.cvp-loaner-16..| > 00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > * > 00000080 00 00 32 2e 36 2e 33 34 2d 72 63 34 2d 30 30 31 > |..2.6.34-rc4-001| > 00000090 31 35 2d 67 64 63 35 37 64 61 33 00 00 00 00 00 > |15-gdc57da3.....| > 000000a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > * > 000000c0 00 00 00 23 36 20 53 4d 50 20 46 72 69 20 41 70 |...#6 SMP Fri > Ap| > 000000d0 72 20 31 36 20 31 30 3a 34 31 3a 34 33 20 50 44 |r 16 10:41:43 > PD| > 000000e0 54 20 32 30 31 30 00 00 00 00 00 00 00 00 00 00 |T > 2010..........| > 000000f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > 00000100 00 00 00 00 78 38 36 5f 36 34 00 00 00 00 00 00 > |....x86_64......| > 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 > |................| > * > 00000140 00 00 00 00 00 78 78 78 78 78 78 78 78 78 78 78 > |.....xxxxxxxxxxx| > 00000150 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 > |xxxxxxxxxxxxxxxx| > * > 000003e0 78 78 78 78 78 78 78 78 |xxxxxxxx| > 000003e8 > > This results in 32-bit applications that attempt to use libnss_nis's > getpwuid() > to fail with "YPBINDPROC_DOMAIN: Domain not bound", because they use an > uninitialized value for domainname. > > -- > Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email > ------- You are receiving this mail because: ------- > You are on the CC list for the bug. --- ~Randy erk. Christoph, did "improve sys_newuname() for compat architectures" cause this? (In reply to comment #1) > > 2.6.34-rc4 uname(2) from a x86_32 process copies out 325 bytes rather than > the > > 390 bytes that 2.6.31 copied out (and that userland expects): > > Just to clarify (?), that's a 32-bit process on a 64-bit kernel, right? Yes, that's right, i686 process on amd64 kernel. I'd prefer to keep the discussion in the lkml thread <20100419192147.GP11130@hexapodia.org> aka http://lkml.org/lkml/2010/4/19/272 Thanks, -andy Merged x86-correctly-wire-up-the-newuname-system-call.patch into -mm. Handled-By : Christoph Hellwig <hch@lst.de> Patch : https://patchwork.kernel.org/patch/93604/ Fixed by commit 4cecd935f67bf46a9fe8037c710dd86651fcafe4 . |
2.6.34-rc4 uname(2) from a x86_32 process copies out 325 bytes rather than the 390 bytes that 2.6.31 copied out (and that userland expects): 2.6.31.12% cat foo.c main() { char buf[1000]; memset(buf, 'x', sizeof(buf)); uname(buf); write(1, buf, sizeof(buf)); return 0; } 2.6.31.12% i686-linux-gcc foo.c 2.6.31.12% ./a.out | hd 00000000 4c 69 6e 75 78 00 00 00 00 00 00 00 00 00 00 00 |Linux...........| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000040 00 63 76 70 65 34 33 30 30 00 00 00 00 00 00 00 |.cvpe4300.......| 00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000080 00 00 32 2e 36 2e 33 31 2e 31 32 2d 63 76 70 32 |..2.6.31.12-cvp2| 00000090 30 31 30 30 33 32 39 2d 30 30 31 34 38 2d 67 39 |0100329-00148-g9| 000000a0 61 38 62 36 36 61 00 00 00 00 00 00 00 00 00 00 |a8b66a..........| 000000b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000000c0 00 00 00 23 36 20 53 4d 50 20 54 75 65 20 41 70 |...#6 SMP Tue Ap| 000000d0 72 20 36 20 31 36 3a 30 33 3a 33 31 20 50 44 54 |r 6 16:03:31 PDT| 000000e0 20 32 30 31 30 00 00 00 00 00 00 00 00 00 00 00 | 2010...........| 000000f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000100 00 00 00 00 78 38 36 5f 36 34 00 00 00 00 00 00 |....x86_64......| 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000140 00 00 00 00 00 28 6e 6f 6e 65 29 00 00 00 00 00 |.....(none).....| 00000150 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000180 00 00 00 00 00 00 78 78 78 78 78 78 78 78 78 78 |......xxxxxxxxxx| 00000190 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 |xxxxxxxxxxxxxxxx| * 000003e0 78 78 78 78 78 78 78 78 |xxxxxxxx| 000003e8 2.6.34-rc4% ./a.out | hd 00000000 4c 69 6e 75 78 00 00 00 00 00 00 00 00 00 00 00 |Linux...........| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000040 00 63 76 70 2d 6c 6f 61 6e 65 72 2d 31 36 00 00 |.cvp-loaner-16..| 00000050 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000080 00 00 32 2e 36 2e 33 34 2d 72 63 34 2d 30 30 31 |..2.6.34-rc4-001| 00000090 31 35 2d 67 64 63 35 37 64 61 33 00 00 00 00 00 |15-gdc57da3.....| 000000a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000000c0 00 00 00 23 36 20 53 4d 50 20 46 72 69 20 41 70 |...#6 SMP Fri Ap| 000000d0 72 20 31 36 20 31 30 3a 34 31 3a 34 33 20 50 44 |r 16 10:41:43 PD| 000000e0 54 20 32 30 31 30 00 00 00 00 00 00 00 00 00 00 |T 2010..........| 000000f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000100 00 00 00 00 78 38 36 5f 36 34 00 00 00 00 00 00 |....x86_64......| 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 00000140 00 00 00 00 00 78 78 78 78 78 78 78 78 78 78 78 |.....xxxxxxxxxxx| 00000150 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 78 |xxxxxxxxxxxxxxxx| * 000003e0 78 78 78 78 78 78 78 78 |xxxxxxxx| 000003e8 This results in 32-bit applications that attempt to use libnss_nis's getpwuid() to fail with "YPBINDPROC_DOMAIN: Domain not bound", because they use an uninitialized value for domainname.