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Tue, 10 Nov 2026 20:51:01 -0800 (PST) Date: Tue, 10 Nov 2026 20:51:01 -0800 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6af3f435.926a6ce0.263fd.019a.GAE@google.com> Subject: Re: [syzbot] [block?] BUG: unable to handle kernel paging request in blk_mq_complete_request_remote From: syzbot To: linux-kernel@vger.kernel.org, nenkov2004@gmail.com, 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: BUG: unable to handle kernel paging request in tomoyo_realpath_from_path Unable to handle kernel paging request at virtual address dfff80000000000c KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0 [dfff80000000000c] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 1 UID: 0 PID: 5306 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : tomoyo_realpath_from_path+0x1a0/0x4dc security/tomoyo/realpath.c:265 lr : tomoyo_realpath_from_path+0x140/0x4dc security/tomoyo/realpath.c:257 sp : ffff800093a67510 x29: ffff800093a67540 x28: ffff0000c39b8fff x27: dfff800000000000 x26: 0000000000000fff x25: 0000000000000060 x24: 0000000000001000 x23: 1fffe0001e436caf x22: ffff0000d3d16090 x21: ffff0000c39b8000 x20: ffff0000f21b64e0 x19: ffff0000d3d16050 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000001 x14: 00000000ffff8000 x13: 00000000ac727a19 x12: ffff800080021608 x11: ffff800080021608 x10: 0000000000000003 x9 : 0000000000000000 x8 : 000000000000000c x7 : 0000000000000000 x6 : 000000000000003f x5 : 00000000ffffffff x4 : 0000000000000c40 x3 : 0000000000002000 x2 : 0000000000001000 x1 : ffff0000c8e2bb00 x0 : 0000000000000000 Call trace: tomoyo_realpath_from_path+0x1a0/0x4dc security/tomoyo/realpath.c:265 (P) tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_check_open_permission+0x1c4/0x394 security/tomoyo/file.c:776 tomoyo_file_open+0x78/0xcc security/tomoyo/tomoyo.c:334 security_file_open+0xbc/0x258 security/security.c:2760 do_dentry_open+0x2a0/0xfb4 fs/open.c:977 vfs_open_consume+0x54/0x2ec fs/open.c:1131 do_open fs/namei.c:4851 [inline] path_openat+0x1098/0x1910 fs/namei.c:5016 do_file_open+0x1c8/0x2e8 fs/namei.c:5045 do_sys_openat2+0x114/0x1ec fs/open.c:1442 do_sys_open+0xb0/0xe0 fs/open.c:1448 __do_sys_openat fs/open.c:1464 [inline] __se_sys_openat fs/open.c:1459 [inline] __arm64_sys_openat+0xa8/0xc4 fs/open.c:1459 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:797 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:816 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 Code: 97d64865 f9400328 91018119 d343ff28 (387b6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97d64865 bl 0xffffffffff592194 4: f9400328 ldr x8, [x25] 8: 91018119 add x25, x8, #0x60 c: d343ff28 lsr x8, x25, #3 * 10: 387b6908 ldrb w8, [x8, x27] <-- trapping instruction Tested on: commit: 58c1eb84 arm64: sdei: Preserve the interrupted context.. git tree: https://github.com/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=141d05a1580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a58b6b4d667e7a61 dashboard link: https://syzkaller.appspot.com/bug?extid=2e3bf0bd49acd9b21d4b compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=1141b4c3580000