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Message-ID: <CA+G9fYtOaqvOkargaX9qaOHdKbF_EeB49vAJr985kLujm5-cmw@mail.gmail.com> Date: Mon, 26 Aug 2024 19:27:55 +0530 From: Naresh Kamboju <naresh.kamboju@...aro.org> To: LTP List <ltp@...ts.linux.it>, open list <linux-kernel@...r.kernel.org>, linux-mm <linux-mm@...ck.org> Cc: Andrew Morton <akpm@...ux-foundation.org>, Arnd Bergmann <arnd@...db.de>, Dan Carpenter <dan.carpenter@...aro.org>, Anders Roxell <anders.roxell@...aro.org> Subject: LTP: hugemmap19: PF: supervisor read access in kernel mode The following kernel BUG noticed on x86_64 and qemu-x86_64 while running LTP hugetlb test cases on Linux next-20240823 and next-20240826 intermittently This is been noticed with compat mode running 64 bit kernel on 32-bit rootfs. We will re-investigate these test plan combinations with HUGE_PAGE on compat mode. First seen on - not sure - intermittent Good: not sure BAD: next-20240826 (intermittent) Reported-by: Linux Kernel Functional Testing <lkft@...aro.org> Crash log: -------- hugemmap15.c:123: TINFO: SIGBUS at 0xf5200000 (sig_expected=0xf51fff80) hugemmap15.c:123: TINFO: SIG[ 63.974604] hugemmap19 (460): drop_caches: 3 BUS at 0xf4e00000 (sig_expected=0xf4dfff80) hugemmap15.c:123: TINFO: SIGBUS at 0xf4a00000 (sig_[ 63.987273] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 63.995130] #PF: supervisor read access in kernel mode [ 64.000269] #PF: error_code(0x0000) - not-present page [ 64.005400] PGD 8000000105996067 P4D 8000000105996067 PUD 0 [ 64.011061] Oops: Oops: 0000 [#1] PREEMPT SMP PTI [ 64.015765] CPU: 3 UID: 0 PID: 461 Comm: hugemmap19 Not tainted 6.11.0-rc5-next-20240826 #1 [ 64.024111] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.7 12/07/2021 [ 64.031518] RIP: 0010:mmap_region+0x443/0xcf0 [ 64.035908] Code: cd 29 00 85 c0 0f 84 c0 04 00 00 49 c7 c0 f4 ff ff ff 48 83 7d a0 00 74 af 80 7d 9d 00 0f 85 af 00 00 00 48 8b 9d 50 ff ff ff <48> 8b 04 25 00 00 00 00 83 7b 38 01 74 14 48 3b 43 08 0f 82 fb 00 [ 64.054653] RSP: 0018:ffff9fcdc0647ba0 EFLAGS: 00010246 [ 64.059879] RAX: 0000000000000000 RBX: ffff9fcdc0647c28 RCX: 000000000000000a [ 64.067012] RDX: ffffffff9d892a02 RSI: ffffffff9d892a02 RDI: ffffffff9d89274f [ 64.074142] RBP: ffff9fcdc0647d90 R08: ffffffffffffffea R09: 00000000f7a00000 [ 64.081268] R10: 00000000f7c00000 R11: ffff94ea42ba6000 R12: 00000000f7a00000 [ 64.088400] R13: ffff94ea40064ec0 R14: 0000000000000073 R15: ffff94ea428e91e0 [ 64.095533] FS: 0000000000000000(0000) GS:ffff94ebafb80000(0063) knlGS:00000000f7f525c0 [ 64.103618] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 64.109356] CR2: 0000000000000000 CR3: 0000000102ba6005 CR4: 00000000003706f0 [ 64.116486] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.123610] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.130736] Call Trace: [ 64.133180] <TASK> [ 64.135277] ? show_regs+0x68/0x80 [ 64.138709] ? __die+0x28/0x70 [ 64.141766] ? page_fault_oops+0x17b/0x560 [ 64.145858] ? free_pgtables+0x23e/0x2c0 [ 64.149777] ? do_user_addr_fault+0x2e0/0x600 [ 64.154136] ? exc_page_fault+0x71/0x170 [ 64.158060] ? asm_exc_page_fault+0x2b/0x30 [ 64.162247] ? call_rcu+0x12/0x20 [ 64.165564] ? call_rcu+0x12/0x20 [ 64.168876] ? __call_rcu_common.constprop.0+0x12f/0x390 [ 64.174187] ? mmap_region+0x443/0xcf0 [ 64.177938] do_mmap+0x327/0x5b0 [ 64.181201] vm_mmap_pgoff+0xe6/0x1b0 [ 64.184865] ksys_mmap_pgoff+0x15c/0x1f0 [ 64.188784] __ia32_sys_mmap_pgoff+0x29/0x30 [ 64.193056] ia32_sys_call+0x1ebe/0x27c0 [ 64.196981] __do_fast_syscall_32+0x6e/0x120 [ 64.201255] do_fast_syscall_32+0x37/0x80 [ 64.205266] do_SYSENTER_32+0x23/0x30 [ 64.208924] entry_SYSENTER_compat_after_hwframe+0x84/0x8e [ 64.214410] RIP: 0023:0xf7f57579 [ 64.217641] Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 2e 8d b4 26 00 00 00 00 8d b4 26 00 00 00 [ 64.236378] RSP: 002b:00000000ffc4c3a0 EFLAGS: 00000286 ORIG_RAX: 00000000000000c0 [ 64.243936] RAX: ffffffffffffffda RBX: 00000000f7a00000 RCX: 0000000000200000 [ 64.251059] RDX: 0000000000000003 RSI: 0000000000000012 RDI: 0000000000000003 [ 64.258184] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 64.265306] R10: 0000000000000000 R11: 0000000000000286 R12: 0000000000000000 [ 64.272432] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 64.279558] </TASK> [ 64.281749] Modules linked in: x86_pkg_temp_thermal [ 64.286627] CR2: 0000000000000000 [ 64.289937] ---[ end trace 0000000000000000 ]--- [ 64.294547] RIP: 0010:mmap_region+0x443/0xcf0 [ 64.298898] Code: cd 29 00 85 c0 0f 84 c0 04 00 00 49 c7 c0 f4 ff ff ff 48 83 7d a0 00 74 af 80 7d 9d 00 0f 85 af 00 00 00 48 8b 9d 50 ff ff ff <48> 8b 04 25 00 00 00 00 83 7b 38 01 74 14 48 3b 43 08 0f 82 fb 00 [ 64.317636] RSP: 0018:ffff9fcdc0647ba0 EFLAGS: 00010246 [ 64.322861] RAX: 0000000000000000 RBX: ffff9fcdc0647c28 RCX: 000000000000000a [ 64.329986] RDX: ffffffff9d892a02 RSI: ffffffff9d892a02 RDI: ffffffff9d89274f [ 64.337117] RBP: ffff9fcdc0647d90 R08: ffffffffffffffea R09: 00000000f7a00000 [ 64.344240] R10: 00000000f7c00000 R11: ffff94ea42ba6000 R12: 00000000f7a00000 [ 64.351364] R13: ffff94ea40064ec0 R14: 0000000000000073 R15: ffff94ea428e91e0 [ 64.358512] FS: 0000000000000000(0000) GS:ffff94ebafb80000(0063) knlGS:00000000f7f525c0 [ 64.366592] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 64.372329] CR2: 0000000000000000 CR3: 0000000102ba6005 CR4: 00000000003706f0 [ 64.379469] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 64.386604] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 64.393728] note: hugemmap19[461] exited with irqs disabled expected=0xf49fff80) hugemmap15.c:123: TINFO: SIGBUS at 0xf4600000 (sig_expected=0xf45fff80) Crash Log links, -------- x86_64 device log - https://lkft.validation.linaro.org/scheduler/job/7821061#L2049 x86_64 device log - https://lkft.validation.linaro.org/scheduler/job/7821898#L2102 Qemu-x86_64 log - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240826/testrun/24952975/suite/log-parser-test/test/check-kernel-oops-oops-oops-preempt-smp-pti/log Crash failed comparison: ---------- - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240826/testrun/24954436/suite/log-parser-test/test/check-kernel-oops-oops-oops-preempt-smp-pti/history/ metadata: ---- git describe: next-20240826 git repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next git sha: 1ca4237ad9ce29b0c66fe87862f1da54ac56a1e8 kernel config: https://storage.tuxsuite.com/public/linaro/lkft/builds/2lC5Io63H0fgSxxgMVk7RTlr00F/config artifact location: https://storage.tuxsuite.com/public/linaro/lkft/builds/2lC5Io63H0fgSxxgMVk7RTlr00F/ build url: https://storage.tuxsuite.com/public/linaro/lkft/builds/2lC5Io63H0fgSxxgMVk7RTlr00F/ toolchain: gcc-13 arch: x86_64 LTP url: https://storage.tuxboot.com/overlays/debian/trixie/i386/ltp/20240524/ltp.tar.xz rootfs url: https://storage.tuxboot.com/debian/trixie/i386/rootfs.tar.xz Steps to reproduce: --------- - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2lC5MBjPoo5vifL9EXfsMWCSHfN/reproducer - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2lC5MBjPoo5vifL9EXfsMWCSHfN/tux_plan - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2lC5MDbvH0o3j1TMpyOSDF4alXR/reproducer - https://tuxapi.tuxsuite.com/v1/groups/linaro/projects/lkft/tests/2lC5MDbvH0o3j1TMpyOSDF4alXR/tux_plan Please let me know if you need more information. -- Linaro LKFT https://lkft.linaro.org
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