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Message-ID: <000000000000982020061e937a49@google.com> Date: Wed, 31 Jul 2024 16:30:26 -0700 From: syzbot <syzbot+54ac85e4189aac460540@...kaller.appspotmail.com> To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [kernel?] BUG: unable to handle kernel paging request in find_lock_lowest_rq Hello, syzbot found the following issue on: HEAD commit: 22f546873149 minmax: improve macro expansion and type chec.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17688f9d980000 kernel config: https://syzkaller.appspot.com/x/.config?x=8b0cca2f3880513d dashboard link: https://syzkaller.appspot.com/bug?extid=54ac85e4189aac460540 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/9e475c4ebb27/disk-22f54687.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/333e92710b31/vmlinux-22f54687.xz kernel image: https://storage.googleapis.com/syzbot-assets/830d57b60fec/bzImage-22f54687.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+54ac85e4189aac460540@...kaller.appspotmail.com BUG: unable to handle page fault for address: fffffbfff459d822 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffe4067 P4D 23ffe4067 PUD 23ffe3067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 15194 Comm: syz.4.1359 Not tainted 6.11.0-rc1-syzkaller-00044-g22f546873149 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0018:ffffc9000396f820 EFLAGS: 00010086 RAX: 0000000001eb8501 RBX: 1ffffffff459d822 RCX: ffffffff816fbdab RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffffa2cec110 RBP: ffffffffffffffff R08: ffffffffa2cec117 R09: 1ffffffff459d822 R10: dffffc0000000000 R11: fffffbfff459d822 R12: ffff88802fa8bc00 R13: ffff88802fa8c6d8 R14: dffffc0000000001 R15: fffffbfff459d823 FS: 000055556b4f9500(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff459d822 CR3: 000000007857a000 CR4: 0000000000350ef0 Call Trace: <TASK> instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] __lock_acquire+0xc8b/0x2040 kernel/locking/lockdep.c:5112 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5759 _raw_spin_lock_nested+0x31/0x40 kernel/locking/spinlock.c:378 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560 _double_lock_balance kernel/sched/sched.h:2760 [inline] double_lock_balance kernel/sched/sched.h:2805 [inline] find_lock_lowest_rq+0x1e1/0x670 kernel/sched/rt.c:1941 push_rt_task+0x13f/0x7e0 kernel/sched/rt.c:2074 push_rt_tasks kernel/sched/rt.c:2124 [inline] task_woken_rt+0x14c/0x220 kernel/sched/rt.c:2424 ttwu_do_activate+0x338/0x7e0 kernel/sched/core.c:3594 ttwu_queue kernel/sched/core.c:3846 [inline] try_to_wake_up+0x884/0x1470 kernel/sched/core.c:4167 signal_wake_up_state+0xb4/0x120 kernel/signal.c:773 signal_wake_up include/linux/sched/signal.h:448 [inline] zap_other_threads+0x2fd/0x3e0 kernel/signal.c:1384 do_group_exit+0x18a/0x2c0 kernel/exit.c:1026 __do_sys_exit_group kernel/exit.c:1042 [inline] __se_sys_exit_group kernel/exit.c:1040 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1040 x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f422eb773b9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe323e3558 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f422eb773b9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007ffe323e35ac R08: 0000000000000006 R09: 0000000000133833 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000032 R13: 0000000000133833 R14: 0000000000133449 R15: 00007ffe323e3600 </TASK> Modules linked in: CR2: fffffbfff459d822 ---[ end trace 0000000000000000 ]--- RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0018:ffffc9000396f820 EFLAGS: 00010086 RAX: 0000000001eb8501 RBX: 1ffffffff459d822 RCX: ffffffff816fbdab RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffffa2cec110 RBP: ffffffffffffffff R08: ffffffffa2cec117 R09: 1ffffffff459d822 R10: dffffc0000000000 R11: fffffbfff459d822 R12: ffff88802fa8bc00 R13: ffff88802fa8c6d8 R14: dffffc0000000001 R15: fffffbfff459d823 FS: 000055556b4f9500(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff459d822 CR3: 000000007857a000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 4f 8d fisttps -0x73(%rdi) 3: 3c 31 cmp $0x31,%al 5: 4c 89 fd mov %r15,%rbp 8: 4c 29 dd sub %r11,%rbp b: 48 83 fd 10 cmp $0x10,%rbp f: 7f 29 jg 0x3a 11: 48 85 ed test %rbp,%rbp 14: 0f 84 3e 01 00 00 je 0x158 1a: 4c 89 cd mov %r9,%rbp 1d: 48 f7 d5 not %rbp 20: 48 01 dd add %rbx,%rbp * 23: 41 80 3b 00 cmpb $0x0,(%r11) <-- trapping instruction 27: 0f 85 c9 01 00 00 jne 0x1f6 2d: 49 ff c3 inc %r11 30: 48 ff c5 inc %rbp 33: 75 ee jne 0x23 35: e9 .byte 0xe9 36: 1e (bad) 37: 01 00 add %eax,(%rax) --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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