> -----Original Message----- > From: syzbot > [mailto:syzbot+17c13600b3977aa8ef7f@xxxxxxxxxxxxxxxxxxxxxxxxx] > Sent: Thursday, April 19, 2018 11:04 AM > To: Daniel Jurgens <danielj@xxxxxxxxxxxx>; > dasaratharaman.chandramouli@xxxxxxxxx; dledford@xxxxxxxxxx; > jgg@xxxxxxxx; leon@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux- > rdma@xxxxxxxxxxxxxxx; Moni Shoua <monis@xxxxxxxxxxxx>; Parav Pandit > <parav@xxxxxxxxxxxx>; swise@xxxxxxxxxxxxxxxxxxxxx; syzkaller- > bugs@xxxxxxxxxxxxxxxx > Subject: general protection fault in rdma_resolve_route > > Hello, > > syzbot hit the following crash on upstream commit > a27fc14219f2e3c4a46ba9177b04d9b52c875532 (Mon Apr 16 21:07:39 2018 > +0000) Merge branch 'parisc-4.17-3' of > git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux > syzbot dashboard link: > https://syzkaller.appspot.com/bug?extid=17c13600b3977aa8ef7f > > So far this crash happened 2 times on upstream. > Unfortunately, I don't have any reproducer for this crash yet. > Raw console output: > https://syzkaller.appspot.com/x/log.txt?id=6198183931674624 > Kernel config: > https://syzkaller.appspot.com/x/.config?id=-5914490758943236750 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+17c13600b3977aa8ef7f@xxxxxxxxxxxxxxxxxxxxxxxxx > It will help syzbot understand when the bug is fixed. See footer for details. > If you forward the report, please keep this part and the footer. > > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access general > protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: > CPU: 1 PID: 750 Comm: syz-executor4 Not tainted 4.17.0-rc1+ #6 Hardware > name: Google Google Compute Engine/Google Compute Engine, BIOS Google > 01/01/2011 > RIP: 0010:rdma_cap_ib_sa include/rdma/ib_verbs.h:2840 [inline] > RIP: 0010:rdma_resolve_route+0x134/0x2160 > drivers/infiniband/core/cma.c:2668 > RSP: 0018:ffff8801b3e87850 EFLAGS: 00010202 > RAX: 0000000000000000 RBX: ffff8801abf92c00 RCX: 0000000000000029 > RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000148 > RBP: ffff8801b3e87a00 R08: ffffed00357f25e5 R09: ffffed00357f25e4 > R10: ffffed00357f25e4 R11: ffff8801abf92f23 R12: 1ffff100367d0f12 > R13: dffffc0000000000 R14: ffff8801abf92db8 R15: 0000000000000000 > FS: 00007f673e752700(0000) GS:ffff8801db100000(0000) > knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000000a3eab8 CR3: 00000001b10e7000 CR4: 00000000001426e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call > Trace: > ucma_resolve_route+0x179/0x1c0 drivers/infiniband/core/ucma.c:741 > ucma_write+0x328/0x410 drivers/infiniband/core/ucma.c:1664 > __vfs_write+0x10b/0x880 fs/read_write.c:485 > vfs_write+0x1f8/0x560 fs/read_write.c:549 > ksys_write+0xf9/0x250 fs/read_write.c:598 > __do_sys_write fs/read_write.c:610 [inline] > __se_sys_write fs/read_write.c:607 [inline] > __x64_sys_write+0x73/0xb0 fs/read_write.c:607 > do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x455329 > RSP: 002b:00007f673e751c68 EFLAGS: 00000246 ORIG_RAX: > 0000000000000001 > RAX: ffffffffffffffda RBX: 00007f673e7526d4 RCX: 0000000000455329 > RDX: 0000000000000010 RSI: 0000000020000100 RDI: 0000000000000014 > RBP: 000000000072c010 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff > R13: 00000000000006c3 R14: 00000000006fd2e8 R15: 0000000000000002 > Code: ff df 48 c1 ea 03 80 3c 02 00 0f 85 14 1c 00 00 48 ba 00 00 00 00 00 fc ff df > 48 8b 03 48 8d b8 48 01 00 00 48 89 f9 48 c1 e9 03 <80> 3c 11 00 0f 85 d7 1b 00 > 00 45 0f b6 ef 49 c1 e5 04 4c 03 a8 > RIP: rdma_cap_ib_sa include/rdma/ib_verbs.h:2840 [inline] RSP: > ffff8801b3e87850 > RIP: rdma_resolve_route+0x134/0x2160 drivers/infiniband/core/cma.c:2668 > RSP: ffff8801b3e87850 > ---[ end trace c34c2fb6aeff4a19 ]--- > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. > If you forgot to add the Reported-by tag, once the fix for this bug is merged into > any tree, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report If it's a one-off invalid bug report, > please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug report. > Note: all commands must start from beginning of the line in the email body. For short term, we need helper similar to ucma_get_ctx() as ucma_get_ctx_with_device() which performs NULL check for cm_id->device. Currently its done at several places in ucma commands such as ucma_set_ib_path, ucma_notify etc. ��.n��������+%������w��{.n�����{���fk��ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
