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AJvYcCUX9u/s/bMaTUXMPhC4ettquYk2TuQZ5ZqAuQXA7AGD1AktCSOG9S1w8TIallcuzzXYTZERgKfY8ZmH1/s=@vger.kernel.org X-Gm-Message-State: AOJu0YyD/9rHtJNd9LKRSn7x9yfOMn48ntIzPw+Gtpi8eO+bLkcmNeC+ 8XtJg5/2sirDUvF7q0uoHRhXqsfL3xg/N5HCPPMRnoPl6xzPltxvNBDdc9h9pWBriyvqDhOhji0 Le4kdRYHYW/DN74X11vLzQr+ZVt97Kpd/IhhMeiX4xi15TdQUfS+j3bttsKk= X-Google-Smtp-Source: AGHT+IGDk9E4rbKzUWsrydNQDkDrVyiy6Af7VTnfcbXdAY/BA/r33mQ9dKpzDjEdn+CnPJvSWU+vfN4L37wpFBnKegunixw1Z2Cz Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a4a:e913:0:b0:659:9a49:9040 with SMTP id 006d021491bc7-6599a8b9af5mr2053475eaf.11.1765122302558; Sun, 07 Dec 2025 07:45:02 -0800 (PST) Date: Sun, 07 Dec 2025 07:45:02 -0800 In-Reply-To: <20251207153059.2790675-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6935a0fe.a70a0220.38f243.0060.GAE@google.com> Subject: Re: [syzbot] [mm?] general protection fault in lru_gen_test_recent (2) From: syzbot To: kartikey406@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: general protection fault in lru_gen_test_recent Oops: general protection fault, probably for non-canonical address 0xdffffc00000009c0: 0000 [#1] SMP KASAN NOPTI KASAN: probably user-memory-access in range [0x0000000000004e00-0x0000000000004e07] CPU: 0 UID: 0 PID: 6460 Comm: syz.0.36 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:mem_cgroup_lruvec include/linux/memcontrol.h:720 [inline] RIP: 0010:lru_gen_test_recent+0xfc/0x370 mm/workingset.c:277 Code: 2a 80 b5 ff 48 85 db 0f 84 79 01 00 00 e8 1c 80 b5 ff 49 8d bd 00 4e 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e d3 01 00 00 4d 63 b5 00 4e 00 RSP: 0018:ffffc9000313f828 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88801d688000 RCX: ffffc9000313f72c RDX: 00000000000009c0 RSI: ffffffff82096454 RDI: 0000000000004e00 RBP: ffffc9000313f8c0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8880280f0b30 R12: ffffc9000313f8e0 R13: 0000000000000000 R14: ffffc9000313f8b0 R15: 0000000000000000 FS: 00007fb06f8496c0(0000) GS:ffff8880d6909000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000409000000 CR3: 0000000057f81000 CR4: 0000000000352ef0 Call Trace: lru_gen_refault mm/workingset.c:298 [inline] workingset_refault+0x251/0xca0 mm/workingset.c:548 filemap_add_folio+0x23d/0x610 mm/filemap.c:981 do_read_cache_folio+0x23c/0x5c0 mm/filemap.c:4063 freader_get_folio+0x33a/0x930 lib/buildid.c:58 freader_fetch+0xbd/0x740 lib/buildid.c:101 __build_id_parse.isra.0+0xdd/0x6c0 lib/buildid.c:289 do_procmap_query+0xb0e/0x1080 fs/proc/task_mmu.c:733 procfs_procmap_ioctl+0x9d/0xe0 fs/proc/task_mmu.c:813 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb06e98f7c9 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:00007fb06f849038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fb06ebe5fa0 RCX: 00007fb06e98f7c9 RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000003 RBP: 00007fb06ea13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb06ebe6038 R14: 00007fb06ebe5fa0 R15: 00007ffd239d7168 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:mem_cgroup_lruvec include/linux/memcontrol.h:720 [inline] RIP: 0010:lru_gen_test_recent+0xfc/0x370 mm/workingset.c:277 Code: 2a 80 b5 ff 48 85 db 0f 84 79 01 00 00 e8 1c 80 b5 ff 49 8d bd 00 4e 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e d3 01 00 00 4d 63 b5 00 4e 00 RSP: 0018:ffffc9000313f828 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88801d688000 RCX: ffffc9000313f72c RDX: 00000000000009c0 RSI: ffffffff82096454 RDI: 0000000000004e00 RBP: ffffc9000313f8c0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: ffff8880280f0b30 R12: ffffc9000313f8e0 R13: 0000000000000000 R14: ffffc9000313f8b0 R15: 0000000000000000 FS: 00007fb06f8496c0(0000) GS:ffff8880d6a09000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb06e973460 CR3: 0000000057f81000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 2a 80 b5 ff 48 85 sub -0x7ab7004b(%rax),%al 6: db 0f fisttpl (%rdi) 8: 84 79 01 test %bh,0x1(%rcx) b: 00 00 add %al,(%rax) d: e8 1c 80 b5 ff call 0xffb5802e 12: 49 8d bd 00 4e 00 00 lea 0x4e00(%r13),%rdi 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 89 fa mov %rdi,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 0f b6 04 02 movzbl (%rdx,%rax,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 74 08 je 0x3a 32: 3c 03 cmp $0x3,%al 34: 0f 8e d3 01 00 00 jle 0x20d 3a: 4d rex.WRB 3b: 63 .byte 0x63 3c: b5 00 mov $0x0,%ch 3e: 4e rex.WRX Tested on: commit: 9e906a9d Merge tag 'perf-tools-for-v6.19-2025-12-06' o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1601521a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=dbcb767d1e1208ac dashboard link: https://syzkaller.appspot.com/bug?extid=e008db2ac01e282550ee compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 patch: https://syzkaller.appspot.com/x/patch.diff?x=1202f21a580000