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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hello, kernel test robot noticed "kernel_BUG_at_include/linux/page_ref.h" on: commit: efa7df3e3bb5da8e6abbe37727417f32a37fba47 ("mm: align larger anonymous mappings on THP boundaries") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master e0cce98fe279b64f4a7d81b7f5c3a23d80b92fbc] [test failed on linux-next/master 6dc544b66971c7f9909ff038b62149105272d26a] in testcase: trinity version: trinity-x86_64-6a17c218-1_20240527 with following parameters: runtime: 300s group: group-00 nr_groups: 5 compiler: gcc-13 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) we noticed the issue does not always happen. 34 times out of 50 runs as below. the parent is clean. 1803d0c5ee1a3bbe efa7df3e3bb5da8e6abbe377274 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :50 68% 34:50 dmesg.Kernel_panic-not_syncing:Fatal_exception :50 68% 34:50 dmesg.RIP:try_get_folio :50 68% 34:50 dmesg.invalid_opcode:#[##] :50 68% 34:50 dmesg.kernel_BUG_at_include/linux/page_ref.h If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot | Closes: https://lore.kernel.org/oe-lkp/202405311534.86cd4043-lkp@intel.com [ 275.267158][ T4335] ------------[ cut here ]------------ [ 275.267949][ T4335] kernel BUG at include/linux/page_ref.h:275! [ 275.268526][ T4335] invalid opcode: 0000 [#1] KASAN PTI [ 275.269001][ T4335] CPU: 0 PID: 4335 Comm: trinity-c3 Not tainted 6.7.0-rc4-00061-gefa7df3e3bb5 #1 [ 275.269787][ T4335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 275.270679][ T4335] RIP: 0010:try_get_folio (include/linux/page_ref.h:275 (discriminator 3) mm/gup.c:79 (discriminator 3)) [ 275.271159][ T4335] Code: c3 cc cc cc cc 44 89 e6 48 89 df e8 e4 54 11 00 eb ae 90 0f 0b 90 31 db eb d5 9c 58 0f 1f 40 00 f6 c4 02 0f 84 46 ff ff ff 90 <0f> 0b 48 c7 c6 a0 54 d2 87 48 89 df e8 a9 e9 ff ff 90 0f 0b be 04 All code ======== 0: c3 ret 1: cc int3 2: cc int3 3: cc int3 4: cc int3 5: 44 89 e6 mov %r12d,%esi 8: 48 89 df mov %rbx,%rdi b: e8 e4 54 11 00 call 0x1154f4 10: eb ae jmp 0xffffffffffffffc0 12: 90 nop 13: 0f 0b ud2 15: 90 nop 16: 31 db xor %ebx,%ebx 18: eb d5 jmp 0xffffffffffffffef 1a: 9c pushf 1b: 58 pop %rax 1c: 0f 1f 40 00 nopl 0x0(%rax) 20: f6 c4 02 test $0x2,%ah 23: 0f 84 46 ff ff ff je 0xffffffffffffff6f 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 48 c7 c6 a0 54 d2 87 mov $0xffffffff87d254a0,%rsi 33: 48 89 df mov %rbx,%rdi 36: e8 a9 e9 ff ff call 0xffffffffffffe9e4 3b: 90 nop 3c: 0f 0b ud2 3e: be .byte 0xbe 3f: 04 .byte 0x4 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 48 c7 c6 a0 54 d2 87 mov $0xffffffff87d254a0,%rsi 9: 48 89 df mov %rbx,%rdi c: e8 a9 e9 ff ff call 0xffffffffffffe9ba 11: 90 nop 12: 0f 0b ud2 14: be .byte 0xbe 15: 04 .byte 0x4 [ 275.272813][ T4335] RSP: 0018:ffffc90005dcf650 EFLAGS: 00010202 [ 275.273346][ T4335] RAX: 0000000000000246 RBX: ffffea00066e0000 RCX: 0000000000000000 [ 275.274032][ T4335] RDX: fffff94000cdc007 RSI: 0000000000000004 RDI: ffffea00066e0034 [ 275.274719][ T4335] RBP: ffffea00066e0000 R08: 0000000000000000 R09: fffff94000cdc006 [ 275.275404][ T4335] R10: ffffea00066e0037 R11: 0000000000000000 R12: 0000000000000136 [ 275.276106][ T4335] R13: ffffea00066e0034 R14: dffffc0000000000 R15: ffffea00066e0008 [ 275.276790][ T4335] FS: 00007fa2f9b61740(0000) GS:ffffffff89d0d000(0000) knlGS:0000000000000000 [ 275.277570][ T4335] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 275.278143][ T4335] CR2: 00007fa2f6c00000 CR3: 0000000134b04000 CR4: 00000000000406f0 [ 275.278833][ T4335] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 275.279521][ T4335] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 275.280201][ T4335] Call Trace: [ 275.280499][ T4335] [ 275.280751][ T4335] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 275.281087][ T4335] ? do_trap (arch/x86/kernel/traps.c:112 arch/x86/kernel/traps.c:153) [ 275.281463][ T4335] ? try_get_folio (include/linux/page_ref.h:275 (discriminator 3) mm/gup.c:79 (discriminator 3)) [ 275.281884][ T4335] ? try_get_folio (include/linux/page_ref.h:275 (discriminator 3) mm/gup.c:79 (discriminator 3)) [ 275.282300][ T4335] ? do_error_trap (arch/x86/kernel/traps.c:174) [ 275.282711][ T4335] ? try_get_folio (include/linux/page_ref.h:275 (discriminator 3) mm/gup.c:79 (discriminator 3)) [ 275.283129][ T4335] ? handle_invalid_op (arch/x86/kernel/traps.c:212) [ 275.283561][ T4335] ? try_get_folio (include/linux/page_ref.h:275 (discriminator 3) mm/gup.c:79 (discriminator 3)) [ 275.283990][ T4335] ? exc_invalid_op (arch/x86/kernel/traps.c:264) [ 275.284415][ T4335] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:568) [ 275.284859][ T4335] ? try_get_folio (include/linux/page_ref.h:275 (discriminator 3) mm/gup.c:79 (discriminator 3)) [ 275.285278][ T4335] try_grab_folio (mm/gup.c:148) [ 275.285684][ T4335] __get_user_pages (mm/gup.c:1297 (discriminator 1)) [ 275.286111][ T4335] ? __pfx___get_user_pages (mm/gup.c:1188) [ 275.286579][ T4335] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 275.287034][ T4335] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 1)) [ 275.287416][ T4335] __gup_longterm_locked (mm/gup.c:1509 mm/gup.c:2209) [ 275.288192][ T4335] ? __pfx___gup_longterm_locked (mm/gup.c:2204) [ 275.288697][ T4335] ? __pfx_lock_acquire (kernel/locking/lockdep.c:5722) [ 275.289135][ T4335] ? __pfx___might_resched (kernel/sched/core.c:10106) [ 275.289595][ T4335] pin_user_pages_remote (mm/gup.c:3350) [ 275.290041][ T4335] ? __pfx_pin_user_pages_remote (mm/gup.c:3350) [ 275.290545][ T4335] ? find_held_lock (kernel/locking/lockdep.c:5244 (discriminator 1)) [ 275.290961][ T4335] ? mm_access (kernel/fork.c:1573) [ 275.291353][ T4335] process_vm_rw_single_vec+0x142/0x360 [ 275.291900][ T4335] ? __pfx_process_vm_rw_single_vec+0x10/0x10 [ 275.292471][ T4335] ? mm_access (kernel/fork.c:1573) [ 275.292859][ T4335] process_vm_rw_core+0x272/0x4e0 [ 275.293384][ T4335] ? hlock_class (arch/x86/include/asm/bitops.h:227 arch/x86/include/asm/bitops.h:239 include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 275.293780][ T4335] ? __pfx_process_vm_rw_core+0x10/0x10 [ 275.294350][ T4335] process_vm_rw (mm/process_vm_access.c:284) [ 275.294748][ T4335] ? __pfx_process_vm_rw (mm/process_vm_access.c:259) [ 275.295197][ T4335] ? __task_pid_nr_ns (include/linux/rcupdate.h:306 (discriminator 1) include/linux/rcupdate.h:780 (discriminator 1) kernel/pid.c:504 (discriminator 1)) [ 275.295634][ T4335] __x64_sys_process_vm_readv (mm/process_vm_access.c:291) [ 275.296139][ T4335] ? syscall_enter_from_user_mode (kernel/entry/common.c:94 kernel/entry/common.c:112) [ 275.296642][ T4335] do_syscall_64 (arch/x86/entry/common.c:51 (discriminator 1) arch/x86/entry/common.c:82 (discriminator 1)) [ 275.297032][ T4335] ? __task_pid_nr_ns (include/linux/rcupdate.h:306 (discriminator 1) include/linux/rcupdate.h:780 (discriminator 1) kernel/pid.c:504 (discriminator 1)) [ 275.297470][ T4335] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 275.297988][ T4335] ? do_syscall_64 (arch/x86/include/asm/cpufeature.h:171 arch/x86/entry/common.c:97) [ 275.298389][ T4335] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 275.298906][ T4335] ? do_syscall_64 (arch/x86/include/asm/cpufeature.h:171 arch/x86/entry/common.c:97) [ 275.299304][ T4335] ? do_syscall_64 (arch/x86/include/asm/cpufeature.h:171 arch/x86/entry/common.c:97) [ 275.299703][ T4335] ? do_syscall_64 (arch/x86/include/asm/cpufeature.h:171 arch/x86/entry/common.c:97) [ 275.300115][ T4335] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 275.300622][ T4335] RIP: 0033:0x7fa2f9c65719 [ 275.301011][ T4335] Code: 08 89 e8 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b7 06 0d 00 f7 d8 64 89 01 48 All code ======== 0: 08 89 e8 5b 5d c3 or %cl,-0x3ca2a418(%rcx) 6: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) d: 00 00 00 10: 90 nop 11: 48 89 f8 mov %rdi,%rax 14: 48 89 f7 mov %rsi,%rdi 17: 48 89 d6 mov %rdx,%rsi 1a: 48 89 ca mov %rcx,%rdx 1d: 4d 89 c2 mov %r8,%r10 20: 4d 89 c8 mov %r9,%r8 23: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 28: 0f 05 syscall 2a:* 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 30: 73 01 jae 0x33 32: c3 ret 33: 48 8b 0d b7 06 0d 00 mov 0xd06b7(%rip),%rcx # 0xd06f1 3a: f7 d8 neg %eax 3c: 64 89 01 mov %eax,%fs:(%rcx) 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax 6: 73 01 jae 0x9 8: c3 ret 9: 48 8b 0d b7 06 0d 00 mov 0xd06b7(%rip),%rcx # 0xd06c7 10: f7 d8 neg %eax 12: 64 89 01 mov %eax,%fs:(%rcx) 15: 48 rex.W The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240531/202405311534.86cd4043-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki