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AJvYcCWwMbx3tTsXi+j31KOr00DMPFh5iNTQbAIXNTzGj3b0V40yInfakpecOJBwjUg4KFNDwAs2u8Isvb32e5M1@vger.kernel.org X-Gm-Message-State: AOJu0Yzw+N+yTtZ3FzA1PFidrmcV193NGDjgUyy5AbNmbv88jL4g+nbv 857MIs7oV7TMb+GCrmkihVFp1wBkLu/0VyjHGx/llMmWGLlxY/fJl3iDVixeW4L82PcREutUwr0 Fx8mgPBW83oo6jrtjjdxGtmgrRPNLJ7FW3ElLSr0tOQugG3rk/YhLUPEhgME= Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:823:b0:664:86ce:df65 with SMTP id 006d021491bc7-67c0dacf554mr97455eaf.32.1773768805323; Tue, 17 Mar 2026 10:33:25 -0700 (PDT) Date: Tue, 17 Mar 2026 10:33:25 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69b99065.050a0220.248e02.012f.GAE@google.com> Subject: [syzbot] [mm?] [fs?] general protection fault in rwsem_mark_wake From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, luto@kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@kernel.org, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: b84a0ebe421c Add linux-next specific files for 20260313 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=159fdd52580000 kernel config: https://syzkaller.appspot.com/x/.config?x=e7280ad1f68b2dce dashboard link: https://syzkaller.appspot.com/bug?extid=334054c6077f3a88ab3a compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15ee4216580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12b478da580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/09145161a8a9/disk-b84a0ebe.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b64c254e474c/vmlinux-b84a0ebe.xz kernel image: https://storage.googleapis.com/syzbot-assets/a7c33f5f7f45/bzImage-b84a0ebe.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+334054c6077f3a88ab3a@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] CPU: 0 UID: 0 PID: 6080 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:rwsem_mark_wake+0xfa/0x7c0 kernel/locking/rwsem.c:445 Code: 01 00 74 08 4c 89 f7 e8 e4 c2 8d 00 4c 89 74 24 10 4d 8b 26 4d 8d 74 24 18 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 75 06 00 00 41 83 3e 00 74 64 4c 89 ef be RSP: 0018:ffffc900021cf9a0 EFLAGS: 00010006 RAX: 0000000000000003 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 1ffff92000439f40 RSI: ffffffff8e4a660a RDI: ffffffff8c4a5c80 RBP: ffffc900021cfaa0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000439f50 R12: 0000000000000000 R13: ffff88807da38f50 R14: 0000000000000018 R15: ffffc900021cfc20 FS: 00005555890a6500(0000) GS:ffff888124de0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000605000 CR3: 000000007a580000 CR4: 00000000003526f0 Call Trace: rwsem_del_wake_waiter+0x25d/0x2e0 kernel/locking/rwsem.c:612 rwsem_down_write_slowpath+0xa6f/0x1080 kernel/locking/rwsem.c:1234 __down_write_common kernel/locking/rwsem.c:1347 [inline] __down_write_killable kernel/locking/rwsem.c:1361 [inline] down_write_killable+0x1eb/0x240 kernel/locking/rwsem.c:1639 mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline] vm_mmap_pgoff+0x234/0x4f0 mm/util.c:579 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6cd219c502 Code: 4f 01 00 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 89 cd 53 48 89 fb 48 85 ff 74 3b 41 89 ea 48 89 df b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 6e 5b 5d c3 0f 1f 00 48 c7 c0 e8 ff ff ff 64 RSP: 002b:00007ffdcb93dea8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6cd219c502 RDX: 0000000000000000 RSI: 0000000000021000 RDI: 0000000000000000 RBP: 0000000000020022 R08: 00000000ffffffff R09: 0000000000000000 R10: 0000000000020022 R11: 0000000000000246 R12: 00007ffdcb93e010 R13: ffffffffffffffc0 R14: 0000000000001000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:rwsem_mark_wake+0xfa/0x7c0 kernel/locking/rwsem.c:445 Code: 01 00 74 08 4c 89 f7 e8 e4 c2 8d 00 4c 89 74 24 10 4d 8b 26 4d 8d 74 24 18 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 75 06 00 00 41 83 3e 00 74 64 4c 89 ef be RSP: 0018:ffffc900021cf9a0 EFLAGS: 00010006 RAX: 0000000000000003 RBX: 0000000000000000 RCX: dffffc0000000000 RDX: 1ffff92000439f40 RSI: ffffffff8e4a660a RDI: ffffffff8c4a5c80 RBP: ffffc900021cfaa0 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000439f50 R12: 0000000000000000 R13: ffff88807da38f50 R14: 0000000000000018 R15: ffffc900021cfc20 FS: 00005555890a6500(0000) GS:ffff888124de0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000605000 CR3: 000000007a580000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 01 00 add %eax,(%rax) 2: 74 08 je 0xc 4: 4c 89 f7 mov %r14,%rdi 7: e8 e4 c2 8d 00 call 0x8dc2f0 c: 4c 89 74 24 10 mov %r14,0x10(%rsp) 11: 4d 8b 26 mov (%r14),%r12 14: 4d 8d 74 24 18 lea 0x18(%r12),%r14 19: 4c 89 f0 mov %r14,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 75 06 00 00 jne 0x6ab 36: 41 83 3e 00 cmpl $0x0,(%r14) 3a: 74 64 je 0xa0 3c: 4c 89 ef mov %r13,%rdi 3f: be .byte 0xbe --- 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@googlegroups.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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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