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11:52:39 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a908777.1d9ded08.62e62.00da.GAE@google.com> Subject: [syzbot] general protection fault in _wait_barrier From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 818bebeb63dd drm/xe: Don't hand out the flat CCS storage a.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git console output: https://syzkaller.appspot.com/x/log.txt?x=1255d415580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccca94d2c01b9e78 dashboard link: https://syzkaller.appspot.com/bug?extid=3fe892ea5fc292e1353f compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13d96979580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+3fe892ea5fc292e1353f@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000024: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000120-0x0000000000000127] CPU: 1 UID: 0 PID: 6010 Comm: syz-executor394 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:_wait_barrier+0x8d/0x700 drivers/md/raid1.c:1066 Code: 08 00 00 00 f3 c7 40 0c f3 f3 f3 f3 65 48 8b 05 31 1e 0e 0c 48 89 84 24 d0 00 00 00 31 c0 e8 ea 3f 91 f9 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 11 06 00 00 4c 8b a3 20 01 00 00 4a 8d 04 ad RSP: 0018:ffffc90003487290 EFLAGS: 00010206 RAX: 0000000000000024 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888031924b00 RSI: ffffffff8879c1e6 RDI: 0000000000000000 RBP: 0000000000000120 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81d66229 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88802750c000 R15: ffffc900034879d0 FS: 00007fe51d1166c0(0000) GS:ffff8880d5ca2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005599d4a2eb80 CR3: 0000000035c6b000 CR4: 0000000000352ef0 Call Trace: wait_barrier drivers/md/raid1.c:1154 [inline] raid1_write_request drivers/md/raid1.c:1506 [inline] raid1_make_request+0x484/0x31a0 drivers/md/raid1.c:1696 md_handle_request+0x824/0x1230 drivers/md/md.c:417 md_submit_bio+0x1e9/0x350 drivers/md/md.c:458 __submit_bio block/blk-core.c:681 [inline] __submit_bio+0x20e/0x3d0 block/blk-core.c:670 __submit_bio_noacct block/blk-core.c:724 [inline] submit_bio_noacct_nocheck+0x736/0xc00 block/blk-core.c:792 submit_bio_noacct+0xc93/0x2130 block/blk-core.c:925 bio_await+0x1fa/0x240 block/bio.c:1580 submit_bio_wait+0x19/0x60 block/bio.c:1598 __blkdev_direct_IO_simple+0x4cb/0x8c0 block/fops.c:98 blkdev_direct_IO+0xbee/0x2030 block/fops.c:429 blkdev_direct_write block/fops.c:699 [inline] blkdev_write_iter+0x703/0xd30 block/fops.c:767 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_pwrite64 fs/read_write.c:794 [inline] __do_sys_pwrite64 fs/read_write.c:802 [inline] __se_sys_pwrite64 fs/read_write.c:799 [inline] __x64_sys_pwrite64+0x1eb/0x250 fs/read_write.c:799 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe51d1735de Code: 08 0f 85 f5 e2 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 90 41 57 41 56 4d 89 c6 41 55 4d 89 cd 41 54 55 53 48 83 ec 08 RSP: 002b:00007fe51d116128 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007fe51d1166c0 RCX: 00007fe51d1735de RDX: 0000000000001000 RSI: 0000555588ed6000 RDI: 0000000000000005 RBP: 0000000000000021 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: ffffffffffffffd0 R13: 0000000000000002 R14: 00007ffdb60faaa0 R15: 00007ffdb60fab88 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:_wait_barrier+0x8d/0x700 drivers/md/raid1.c:1066 Code: 08 00 00 00 f3 c7 40 0c f3 f3 f3 f3 65 48 8b 05 31 1e 0e 0c 48 89 84 24 d0 00 00 00 31 c0 e8 ea 3f 91 f9 48 89 e8 48 c1 e8 03 <42> 80 3c 20 00 0f 85 11 06 00 00 4c 8b a3 20 01 00 00 4a 8d 04 ad RSP: 0018:ffffc90003487290 EFLAGS: 00010206 RAX: 0000000000000024 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888031924b00 RSI: ffffffff8879c1e6 RDI: 0000000000000000 RBP: 0000000000000120 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: ffffffff81d66229 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88802750c000 R15: ffffc900034879d0 FS: 00007fe51d1166c0(0000) GS:ffff8880d5ca2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005599d4a2eb80 CR3: 0000000035c6b000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 00 00 add %al,(%rax) 4: f3 c7 40 0c f3 f3 f3 xrelease movl $0xf3f3f3f3,0xc(%rax) b: f3 c: 65 48 8b 05 31 1e 0e mov %gs:0xc0e1e31(%rip),%rax # 0xc0e1e45 13: 0c 14: 48 89 84 24 d0 00 00 mov %rax,0xd0(%rsp) 1b: 00 1c: 31 c0 xor %eax,%eax 1e: e8 ea 3f 91 f9 call 0xf991400d 23: 48 89 e8 mov %rbp,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 0f 85 11 06 00 00 jne 0x646 35: 4c 8b a3 20 01 00 00 mov 0x120(%rbx),%r12 3c: 4a rex.WX 3d: 8d .byte 0x8d 3e: 04 ad add $0xad,%al --- 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