Re: general protection fault in xsk_map_update_elem
On 2019-09-24 00:50, Daniel Borkmann wrote: On Mon, Sep 23, 2019 at 08:49:11AM -0700, syzbot wrote: Hello, syzbot found the following crash on: HEAD commit:b41dae06 Merge tag 'xfs-5.4-merge-7' of git://git.kernel.o.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=130b25ad60 kernel config: https://syzkaller.appspot.com/x/.config?x=dfcf592db22b9132 dashboard link: https://syzkaller.appspot.com/bug?extid=491c1b7565ba9069ecae compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=155a0c2960 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172bf6d960 The bug was bisected to: commit 0402acd683c678874df6bdbc23530ca07ea19353 Author: Björn Töpel Date: Thu Aug 15 09:30:13 2019 + xsk: remove AF_XDP socket from map when the socket is released Bjorn, PTAL, thanks. I'm on it! Thanks for the poke.
Re: general protection fault in xsk_map_update_elem
On Mon, Sep 23, 2019 at 08:49:11AM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit:b41dae06 Merge tag 'xfs-5.4-merge-7' of git://git.kernel.o.. > git tree: net-next > console output: https://syzkaller.appspot.com/x/log.txt?x=130b25ad60 > kernel config: https://syzkaller.appspot.com/x/.config?x=dfcf592db22b9132 > dashboard link: https://syzkaller.appspot.com/bug?extid=491c1b7565ba9069ecae > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=155a0c2960 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172bf6d960 > > The bug was bisected to: > > commit 0402acd683c678874df6bdbc23530ca07ea19353 > Author: Björn Töpel > Date: Thu Aug 15 09:30:13 2019 + > > xsk: remove AF_XDP socket from map when the socket is released Bjorn, PTAL, thanks.
general protection fault in xsk_map_update_elem
Hello,
syzbot found the following crash on:
HEAD commit:b41dae06 Merge tag 'xfs-5.4-merge-7' of git://git.kernel.o..
git tree: net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=130b25ad60
kernel config: https://syzkaller.appspot.com/x/.config?x=dfcf592db22b9132
dashboard link: https://syzkaller.appspot.com/bug?extid=491c1b7565ba9069ecae
compiler: gcc (GCC) 9.0.0 20181231 (experimental)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=155a0c2960
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172bf6d960
The bug was bisected to:
commit 0402acd683c678874df6bdbc23530ca07ea19353
Author: Björn Töpel
Date: Thu Aug 15 09:30:13 2019 +
xsk: remove AF_XDP socket from map when the socket is released
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10d4a82360
final crash:https://syzkaller.appspot.com/x/report.txt?x=12d4a82360
console output: https://syzkaller.appspot.com/x/log.txt?x=14d4a82360
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+491c1b7565ba9069e...@syzkaller.appspotmail.com
Fixes: 0402acd683c6 ("xsk: remove AF_XDP socket from map when the socket is
released")
RDX: 0020 RSI: 2100 RDI: 0002
RBP: 0005 R08: 0001 R09: 7ffef4500033
R10: R11: 0246 R12: 00401ff0
R13: 00402080 R14: R15:
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8878 Comm: syz-executor835 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
RIP: 0010:__list_add include/linux/list.h:64 [inline]
RIP: 0010:list_add_tail include/linux/list.h:93 [inline]
RIP: 0010:xsk_map_sock_add kernel/bpf/xskmap.c:62 [inline]
RIP: 0010:xsk_map_update_elem+0x79c/0xac0 kernel/bpf/xskmap.c:265
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 ef 02 00 00 4c 89 e2 4d 89
a7 d8 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f
85 c0 02 00 00 49 8d 7c 24 08 49 8d 87 d0 05 00 00
RSP: 0018:88809a517bb8 EFLAGS: 00010246
RAX: dc00 RBX: 88809ccc49d0 RCX: 81868070
RDX: RSI: 81868085 RDI: 0001
RBP: 88809a517c78 R08: 8880a10d2000 R09: ed10134a2f65
R10: ed10134a2f64 R11: 0003 R12:
R13: 88809ccc49e0 R14: 888089db5580 R15: 88809ccc4400
FS: 55df2880() GS:8880ae90() knlGS:
CS: 0010 DS: ES: CR0: 80050033
CR2: 2040 CR3: 985e5000 CR4: 001406e0
DR0: DR1: DR2:
DR3: DR6: fffe0ff0 DR7: 0400
Call Trace:
map_update_elem+0xc82/0x10b0 kernel/bpf/syscall.c:966
__do_sys_bpf+0x8b5/0x3350 kernel/bpf/syscall.c:2854
__se_sys_bpf kernel/bpf/syscall.c:2825 [inline]
__x64_sys_bpf+0x73/0xb0 kernel/bpf/syscall.c:2825
do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x440709
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:7ffef4503478 EFLAGS: 0246 ORIG_RAX: 0141
RAX: ffda RBX: 7ffef4503480 RCX: 00440709
RDX: 0020 RSI: 2100 RDI: 0002
RBP: 0005 R08: 0001 R09: 7ffef4500033
R10: R11: 0246 R12: 00401ff0
R13: 00402080 R14: R15:
Modules linked in:
---[ end trace a95b9b926f856077 ]---
RIP: 0010:__list_add include/linux/list.h:64 [inline]
RIP: 0010:list_add_tail include/linux/list.h:93 [inline]
RIP: 0010:xsk_map_sock_add kernel/bpf/xskmap.c:62 [inline]
RIP: 0010:xsk_map_update_elem+0x79c/0xac0 kernel/bpf/xskmap.c:265
Code: 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 ef 02 00 00 4c 89 e2 4d 89
a7 d8 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f
85 c0 02 00 00 49 8d 7c 24 08 49 8d 87 d0 05 00 00
RSP: 0018:88809a517bb8 EFLAGS: 00010246
RAX: dc00 RBX: 88809ccc49d0 RCX: 81868070
RDX: RSI: 81868085 RDI: 0001
RBP: 88809a517c78 R08: 8880a10d2000 R09: ed10134a2f65
R10: ed10134a2f64 R11: 0003 R12:
R13: 88809ccc49e0 R14: 888089db5580 R15: 88809ccc4400
FS: 55df2880() GS:8880ae90() knlGS:
CS: 0010 DS: ES: CR0: 80050033
CR2: 2040 CR3: 985e5000 CR4: 001406e0
DR0: DR1:
