Bug 1224481 (CVE-2024-35917) - VUL-0: CVE-2024-35917: kernel: s390/bpf: Fix bpf_plt pointer arithmetic
Summary: VUL-0: CVE-2024-35917: kernel: s390/bpf: Fix bpf_plt pointer arithmetic
Status: IN_PROGRESS
Alias: CVE-2024-35917
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: S/390-64 Other
: P3 - Medium : Normal
Target Milestone: ---
Assignee: Security Team bot
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/406606/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-35917:5.5:(AV:...
Keywords:
Depends on:
Blocks:
 
Reported: 2024-05-20 13:01 UTC by SMASH SMASH
Modified: 2024-07-08 14:47 UTC (History)
2 users (show)

See Also:
Found By: Security Response Team
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---

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Description SMASH SMASH 2024-05-20 13:01:27 UTC 
In the Linux kernel, the following vulnerability has been resolved:

s390/bpf: Fix bpf_plt pointer arithmetic

Kui-Feng Lee reported a crash on s390x triggered by the
dummy_st_ops/dummy_init_ptr_arg test [1]:

  [<0000000000000002>] 0x2
  [<00000000009d5cde>] bpf_struct_ops_test_run+0x156/0x250
  [<000000000033145a>] __sys_bpf+0xa1a/0xd00
  [<00000000003319dc>] __s390x_sys_bpf+0x44/0x50
  [<0000000000c4382c>] __do_syscall+0x244/0x300
  [<0000000000c59a40>] system_call+0x70/0x98

This is caused by GCC moving memcpy() after assignments in
bpf_jit_plt(), resulting in NULL pointers being written instead of
the return and the target addresses.

Looking at the GCC internals, the reordering is allowed because the
alias analysis thinks that the memcpy() destination and the assignments'
left-hand-sides are based on different objects: new_plt and
bpf_plt_ret/bpf_plt_target respectively, and therefore they cannot
alias.

This is in turn due to a violation of the C standard:

  When two pointers are subtracted, both shall point to elements of the
  same array object, or one past the last element of the array object
  ...

From the C's perspective, bpf_plt_ret and bpf_plt are distinct objects
and cannot be subtracted. In the practical terms, doing so confuses the
GCC's alias analysis.

The code was written this way in order to let the C side know a few
offsets defined in the assembly. While nice, this is by no means
necessary. Fix the noncompliance by hardcoding these offsets.

[1] https://lore.kernel.org/bpf/c9923c1d-971d-4022-8dc8-1364e929d34c@gmail.com/

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-35917
https://www.cve.org/CVERecord?id=CVE-2024-35917
https://git.kernel.org/stable/c/7ded842b356d151ece8ac4985940438e6d3998bb
https://git.kernel.org/stable/c/c3062bdb859b6e2567e7f5c8cde20c0250bb130f
https://git.kernel.org/stable/c/d3d74e45a060d218fe4b0c9174f0a77517509d8e
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-35917.mbox
Comment 11 Maintenance Automation 2024-06-21 12:31:35 UTC 
SUSE-SU-2024:2135-1: An update that solves 428 vulnerabilities, contains 15 features and has 78 security fixes can now be installed.

Category: security (important)
Bug References: 1012628, 1065729, 1181674, 1187716, 1193599, 1194869, 1207948, 1208593, 1209657, 1213573, 1214852, 1215199, 1216196, 1216358, 1216702, 1217169, 1217384, 1217408, 1217489, 1217750, 1217959, 1218205, 1218336, 1218447, 1218562, 1218779, 1218917, 1219104, 1219170, 1219596, 1219623, 1219834, 1220021, 1220045, 1220120, 1220148, 1220328, 1220342, 1220428, 1220430, 1220569, 1220587, 1220738, 1220783, 1220915, 1221044, 1221276, 1221293, 1221303, 1221375, 1221504, 1221612, 1221615, 1221635, 1221645, 1221649, 1221765, 1221777, 1221783, 1221816, 1221829, 1221830, 1221858, 1222115, 1222173, 1222264, 1222273, 1222294, 1222301, 1222303, 1222304, 1222307, 1222357, 1222366, 1222368, 1222371, 1222378, 1222379, 1222385, 1222422, 1222426, 1222428, 1222437, 1222445, 1222459, 1222464, 1222489, 1222522, 1222525, 1222527, 1222531, 1222532, 1222549, 1222550, 1222557, 1222559, 1222563, 1222585, 1222586, 1222596, 1222606, 1222608, 1222613, 1222615, 1222618, 1222622, 1222624, 1222627, 1222630, 1222635, 1222721, 1222727, 1222769, 1222771, 1222772, 1222775, 1222777, 1222780, 1222782, 1222793, 1222799, 1222801, 1222968, 1223007, 1223011, 1223015, 1223016, 1223020, 1223023, 1223024, 1223030, 1223033, 1223034, 1223035, 1223038, 1223039, 1223041, 1223045, 1223046, 1223051, 1223052, 1223058, 1223060, 1223061, 1223076, 1223077, 1223084, 1223111, 1223113, 1223138, 1223143, 1223187, 1223189, 1223190, 1223191, 1223198, 1223202, 1223285, 1223315, 1223338, 1223369, 1223380, 1223384, 1223390, 1223439, 1223462, 1223532, 1223539, 1223575, 1223590, 1223591, 1223592, 1223593, 1223625, 1223628, 1223629, 1223633, 1223634, 1223637, 1223641, 1223643, 1223649, 1223650, 1223651, 1223652, 1223653, 1223654, 1223655, 1223660, 1223661, 1223663, 1223664, 1223665, 1223666, 1223668, 1223669, 1223670, 1223671, 1223675, 1223677, 1223678, 1223686, 1223692, 1223693, 1223695, 1223696, 1223698, 1223705, 1223712, 1223718, 1223728, 1223732, 1223735, 1223739, 1223741, 1223744, 1223745, 1223747, 1223748, 1223749, 1223750, 1223752, 1223754, 1223757, 1223759, 1223761, 1223762, 1223774, 1223782, 1223787, 1223788, 1223789, 1223790, 1223802, 1223805, 1223810, 1223822, 1223827, 1223831, 1223834, 1223838, 1223869, 1223870, 1223871, 1223872, 1223874, 1223944, 1223945, 1223946, 1223991, 1224076, 1224096, 1224098, 1224099, 1224137, 1224166, 1224174, 1224177, 1224180, 1224181, 1224331, 1224348, 1224423, 1224429, 1224430, 1224432, 1224433, 1224437, 1224438, 1224442, 1224443, 1224445, 1224449, 1224477, 1224479, 1224480, 1224481, 1224482, 1224486, 1224487, 1224488, 1224491, 1224492, 1224493, 1224494, 1224495, 1224500, 1224501, 1224502, 1224504, 1224505, 1224506, 1224507, 1224508, 1224509, 1224511, 1224513, 1224517, 1224519, 1224521, 1224524, 1224525, 1224526, 1224530, 1224531, 1224534, 1224537, 1224541, 1224542, 1224543, 1224546, 1224550, 1224552, 1224553, 1224555, 1224557, 1224558, 1224559, 1224562, 1224565, 1224566, 1224567, 1224568, 1224569, 1224571, 1224573, 1224576, 1224577, 1224578, 1224579, 1224580, 1224581, 1224582, 1224585, 1224586, 1224587, 1224588, 1224592, 1224596, 1224598, 1224600, 1224601, 1224602, 1224603, 1224605, 1224607, 1224608, 1224609, 1224611, 1224613, 1224615, 1224617, 1224618, 1224620, 1224621, 1224622, 1224623, 1224624, 1224626, 1224627, 1224628, 1224629, 1224630, 1224632, 1224633, 1224634, 1224636, 1224637, 1224638, 1224639, 1224640, 1224643, 1224644, 1224645, 1224646, 1224647, 1224648, 1224649, 1224650, 1224651, 1224652, 1224653, 1224654, 1224657, 1224660, 1224663, 1224664, 1224665, 1224666, 1224667, 1224668, 1224671, 1224672, 1224674, 1224675, 1224676, 1224677, 1224678, 1224679, 1224680, 1224681, 1224682, 1224683, 1224685, 1224686, 1224687, 1224688, 1224692, 1224696, 1224697, 1224699, 1224701, 1224703, 1224704, 1224705, 1224706, 1224707, 1224709, 1224710, 1224712, 1224714, 1224716, 1224717, 1224718, 1224719, 1224720, 1224721, 1224722, 1224723, 1224725, 1224727, 1224728, 1224729, 1224730, 1224731, 1224732, 1224733, 1224736, 1224738, 1224739, 1224740, 1224741, 1224742, 1224747, 1224749, 1224763, 1224764, 1224765, 1224766, 1224790, 1224792, 1224793, 1224803, 1224804, 1224866, 1224936, 1224989, 1225007, 1225053, 1225133, 1225134, 1225136, 1225172, 1225502, 1225578, 1225579, 1225580, 1225593, 1225605, 1225607, 1225610, 1225616, 1225618, 1225640, 1225642, 1225692, 1225694, 1225695, 1225696, 1225698, 1225699, 1225704, 1225705, 1225708, 1225710, 1225712, 1225714, 1225715, 1225720, 1225722, 1225728, 1225734, 1225735, 1225736, 1225747, 1225748, 1225749, 1225750, 1225756, 1225765, 1225766, 1225769, 1225773, 1225775, 1225842, 1225945
CVE References: CVE-2023-0160, CVE-2023-47233, CVE-2023-52434, CVE-2023-52458, CVE-2023-52463, CVE-2023-52472, CVE-2023-52483, CVE-2023-52492, CVE-2023-52503, CVE-2023-52591, CVE-2023-52608, CVE-2023-52616, CVE-2023-52618, CVE-2023-52631, CVE-2023-52635, CVE-2023-52640, CVE-2023-52641, CVE-2023-52645, CVE-2023-52652, CVE-2023-52653, CVE-2023-52654, CVE-2023-52655, CVE-2023-52657, CVE-2023-52658, CVE-2023-52659, CVE-2023-52660, CVE-2023-52661, CVE-2023-52662, CVE-2023-52663, CVE-2023-52664, CVE-2023-52667, CVE-2023-52669, CVE-2023-52670, CVE-2023-52671, CVE-2023-52673, CVE-2023-52674, CVE-2023-52675, CVE-2023-52676, CVE-2023-52678, CVE-2023-52679, CVE-2023-52680, CVE-2023-52681, CVE-2023-52683, CVE-2023-52685, CVE-2023-52686, CVE-2023-52687, CVE-2023-52690, CVE-2023-52691, CVE-2023-52692, CVE-2023-52693, CVE-2023-52694, CVE-2023-52695, CVE-2023-52696, CVE-2023-52697, CVE-2023-52698, CVE-2023-52771, CVE-2023-52772, CVE-2023-52860, CVE-2023-52882, CVE-2023-6238, CVE-2023-6270, CVE-2023-6531, CVE-2023-7042, CVE-2024-0639, CVE-2024-21823, CVE-2024-22099, CVE-2024-23848, CVE-2024-24861, CVE-2024-25739, CVE-2024-26601, CVE-2024-26611, CVE-2024-26614, CVE-2024-26632, CVE-2024-26638, CVE-2024-26642, CVE-2024-26643, CVE-2024-26652, CVE-2024-26654, CVE-2024-26656, CVE-2024-26657, CVE-2024-26671, CVE-2024-26673, CVE-2024-26674, CVE-2024-26675, CVE-2024-26679, CVE-2024-26684, CVE-2024-26685, CVE-2024-26692, CVE-2024-26696, CVE-2024-26697, CVE-2024-26704, CVE-2024-26714, CVE-2024-26726, CVE-2024-26731, CVE-2024-26733, CVE-2024-26736, CVE-2024-26737, CVE-2024-26739, CVE-2024-26740, CVE-2024-26742, CVE-2024-26756, CVE-2024-26757, CVE-2024-26760, CVE-2024-267600, CVE-2024-26761, CVE-2024-26764, CVE-2024-26769, CVE-2024-26772, CVE-2024-26773, CVE-2024-26774, CVE-2024-26775, CVE-2024-26779, CVE-2024-26783, CVE-2024-26786, CVE-2024-26791, CVE-2024-26793, CVE-2024-26794, CVE-2024-26802, CVE-2024-26805, CVE-2024-26807, CVE-2024-26815, CVE-2024-26816, CVE-2024-26822, CVE-2024-26828, CVE-2024-26832, CVE-2024-26836, CVE-2024-26844, CVE-2024-26846, CVE-2024-26848, CVE-2024-26853, CVE-2024-26854, CVE-2024-26855, CVE-2024-26856, CVE-2024-26857, CVE-2024-26858, CVE-2024-26860, CVE-2024-26861, CVE-2024-26862, CVE-2024-26866, CVE-2024-26868, CVE-2024-26870, CVE-2024-26878, CVE-2024-26881, CVE-2024-26882, CVE-2024-26883, CVE-2024-26884, CVE-2024-26885, CVE-2024-26898, CVE-2024-26899, CVE-2024-26900, CVE-2024-26901, CVE-2024-26903, CVE-2024-26906, CVE-2024-26909, CVE-2024-26921, CVE-2024-26922, CVE-2024-26923, CVE-2024-26925, CVE-2024-26928, CVE-2024-26932, CVE-2024-26933, CVE-2024-26934, CVE-2024-26935, CVE-2024-26937, CVE-2024-26938, CVE-2024-26940, CVE-2024-26943, CVE-2024-26945, CVE-2024-26946, CVE-2024-26948, CVE-2024-26949, CVE-2024-26950, CVE-2024-26951, CVE-2024-26956, CVE-2024-26957, CVE-2024-26958, CVE-2024-26960, CVE-2024-26961, CVE-2024-26962, CVE-2024-26963, CVE-2024-26964, CVE-2024-26972, CVE-2024-26973, CVE-2024-26978, CVE-2024-26979, CVE-2024-26981, CVE-2024-26982, CVE-2024-26983, CVE-2024-26984, CVE-2024-26986, CVE-2024-26988, CVE-2024-26989, CVE-2024-26990, CVE-2024-26991, CVE-2024-26992, CVE-2024-26993, CVE-2024-26994, CVE-2024-26995, CVE-2024-26996, CVE-2024-26997, CVE-2024-26999, CVE-2024-27000, CVE-2024-27001, CVE-2024-27002, CVE-2024-27003, CVE-2024-27004, CVE-2024-27008, CVE-2024-27013, CVE-2024-27014, CVE-2024-27022, CVE-2024-27027, CVE-2024-27028, CVE-2024-27029, CVE-2024-27030, CVE-2024-27031, CVE-2024-27036, CVE-2024-27046, CVE-2024-27056, CVE-2024-27057, CVE-2024-27062, CVE-2024-27067, CVE-2024-27080, CVE-2024-27388, CVE-2024-27389, CVE-2024-27393, CVE-2024-27395, CVE-2024-27396, CVE-2024-27398, CVE-2024-27399, CVE-2024-27400, CVE-2024-27401, CVE-2024-27405, CVE-2024-27408, CVE-2024-27410, CVE-2024-27411, CVE-2024-27412, CVE-2024-27413, CVE-2024-27416, CVE-2024-27417, CVE-2024-27418, CVE-2024-27431, CVE-2024-27432, CVE-2024-27434, CVE-2024-27435, CVE-2024-27436, CVE-2024-35784, CVE-2024-35786, CVE-2024-35788, CVE-2024-35789, CVE-2024-35790, CVE-2024-35791, CVE-2024-35794, CVE-2024-35795, CVE-2024-35796, CVE-2024-35799, CVE-2024-35800, CVE-2024-35801, CVE-2024-35803, CVE-2024-35804, CVE-2024-35806, CVE-2024-35808, CVE-2024-35809, CVE-2024-35810, CVE-2024-35811, CVE-2024-35812, CVE-2024-35813, CVE-2024-35814, CVE-2024-35815, CVE-2024-35817, CVE-2024-35819, CVE-2024-35821, CVE-2024-35822, CVE-2024-35823, CVE-2024-35824, CVE-2024-35825, CVE-2024-35828, CVE-2024-35829, CVE-2024-35830, CVE-2024-35833, CVE-2024-35834, CVE-2024-35835, CVE-2024-35836, CVE-2024-35837, CVE-2024-35838, CVE-2024-35841, CVE-2024-35842, CVE-2024-35845, CVE-2024-35847, CVE-2024-35849, CVE-2024-35850, CVE-2024-35851, CVE-2024-35852, CVE-2024-35854, CVE-2024-35860, CVE-2024-35861, CVE-2024-35862, CVE-2024-35863, CVE-2024-35864, CVE-2024-35865, CVE-2024-35866, CVE-2024-35867, CVE-2024-35868, CVE-2024-35869, CVE-2024-35870, CVE-2024-35872, CVE-2024-35875, CVE-2024-35877, CVE-2024-35878, CVE-2024-35879, CVE-2024-35883, CVE-2024-35885, CVE-2024-35887, CVE-2024-35889, CVE-2024-35891, CVE-2024-35895, CVE-2024-35901, CVE-2024-35903, CVE-2024-35904, CVE-2024-35905, CVE-2024-35907, CVE-2024-35909, CVE-2024-35911, CVE-2024-35912, CVE-2024-35914, CVE-2024-35915, CVE-2024-35916, CVE-2024-35917, CVE-2024-35921, CVE-2024-35922, CVE-2024-35924, CVE-2024-35927, CVE-2024-35928, CVE-2024-35930, CVE-2024-35931, CVE-2024-35932, CVE-2024-35933, CVE-2024-35935, CVE-2024-35936, CVE-2024-35937, CVE-2024-35938, CVE-2024-35940, CVE-2024-35943, CVE-2024-35944, CVE-2024-35945, CVE-2024-35946, CVE-2024-35947, CVE-2024-35950, CVE-2024-35951, CVE-2024-35952, CVE-2024-35953, CVE-2024-35954, CVE-2024-35955, CVE-2024-35956, CVE-2024-35958, CVE-2024-35959, CVE-2024-35960, CVE-2024-35961, CVE-2024-35963, CVE-2024-35964, CVE-2024-35965, CVE-2024-35966, CVE-2024-35967, CVE-2024-35969, CVE-2024-35971, CVE-2024-35972, CVE-2024-35973, CVE-2024-35974, CVE-2024-35975, CVE-2024-35977, CVE-2024-35978, CVE-2024-35981, CVE-2024-35982, CVE-2024-35984, CVE-2024-35986, CVE-2024-35989, CVE-2024-35990, CVE-2024-35991, CVE-2024-35992, CVE-2024-35995, CVE-2024-35997, CVE-2024-35999, CVE-2024-36002, CVE-2024-36006, CVE-2024-36007, CVE-2024-36009, CVE-2024-36011, CVE-2024-36012, CVE-2024-36013, CVE-2024-36014, CVE-2024-36015, CVE-2024-36016, CVE-2024-36018, CVE-2024-36019, CVE-2024-36020, CVE-2024-36021, CVE-2024-36025, CVE-2024-36026, CVE-2024-36029, CVE-2024-36030, CVE-2024-36032, CVE-2024-36880, CVE-2024-36885, CVE-2024-36890, CVE-2024-36891, CVE-2024-36893, CVE-2024-36894, CVE-2024-36895, CVE-2024-36896, CVE-2024-36897, CVE-2024-36898, CVE-2024-36906, CVE-2024-36918, CVE-2024-36921, CVE-2024-36922, CVE-2024-36928, CVE-2024-36930, CVE-2024-36931, CVE-2024-36936, CVE-2024-36940, CVE-2024-36941, CVE-2024-36942, CVE-2024-36944, CVE-2024-36947, CVE-2024-36949, CVE-2024-36950, CVE-2024-36951, CVE-2024-36955, CVE-2024-36959
Jira References: PED-3184, PED-3311, PED-3535, PED-4486, PED-4593, PED-5062, PED-542, PED-5728, PED-5853, PED-6079, PED-6252, PED-7542, PED-7619, PED-8111, PED-8240
Maintenance Incident: [SUSE:Maintenance:34127](https://smelt.suse.de/incident/34127/)
Sources used:
openSUSE Leap 15.6 (src):
 kernel-syms-azure-6.4.0-150600.8.5.1, kernel-source-azure-6.4.0-150600.8.5.4
Public Cloud Module 15-SP6 (src):
 kernel-syms-azure-6.4.0-150600.8.5.1, kernel-source-azure-6.4.0-150600.8.5.4

NOTE: This line indicates an update has been released for the listed product(s). At times this might be only a partial fix. If you have questions please reach out to maintenance coordination.