[moderation] [bpf?] KCSAN: data-race in pcpu_alloc_noprof / pcpu_block_update_hint_alloc
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syzbot
May 19, 2024, 1:57:25 PMMay 19
to syzkaller-upst...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 61307b7be41a Merge tag 'mm-stable-2024-05-17-19-19' of git..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1470be58980000
kernel config: https://syzkaller.appspot.com/x/.config?x=1d0b9016d4db4fd0
dashboard link: https://syzkaller.appspot.com/bug?extid=3bf026c4c7ba9637aad8
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [and...@kernel.org a...@kernel.org b...@vger.kernel.org dan...@iogearbox.net edd...@gmail.com hao...@google.com john.fa...@gmail.com jo...@kernel.org kps...@kernel.org linux-...@vger.kernel.org marti...@linux.dev s...@google.com so...@kernel.org yongho...@linux.dev]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ce096b50da29/disk-61307b7b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b3217a348f2f/vmlinux-61307b7b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/75170567b59e/bzImage-61307b7b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3bf026...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in pcpu_alloc_noprof / pcpu_block_update_hint_alloc
read-write to 0xffffffff8843146c of 4 bytes by task 16262 on cpu 1:
pcpu_update_empty_pages mm/percpu.c:602 [inline]
pcpu_block_update_hint_alloc+0x5db/0x6a0 mm/percpu.c:923
pcpu_alloc_area+0x49f/0x4d0 mm/percpu.c:1258
pcpu_alloc_noprof+0x4b7/0x10d0 mm/percpu.c:1834
bpf_map_alloc_percpu+0xad/0x210 kernel/bpf/syscall.c:466
prealloc_init+0x19f/0x470 kernel/bpf/hashtab.c:341
htab_map_alloc+0x637/0x8f0 kernel/bpf/hashtab.c:576
map_create+0x83c/0xb90 kernel/bpf/syscall.c:1333
__sys_bpf+0x667/0x7a0 kernel/bpf/syscall.c:5669
__do_sys_bpf kernel/bpf/syscall.c:5794 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5792 [inline]
__x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5792
x64_sys_call+0x86c/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:322
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
read to 0xffffffff8843146c of 4 bytes by task 16261 on cpu 0:
pcpu_alloc_noprof+0x9ae/0x10d0 mm/percpu.c:1894
bpf_map_alloc_percpu+0xad/0x210 kernel/bpf/syscall.c:466
prealloc_init+0x19f/0x470 kernel/bpf/hashtab.c:341
htab_map_alloc+0x637/0x8f0 kernel/bpf/hashtab.c:576
map_create+0x83c/0xb90 kernel/bpf/syscall.c:1333
__sys_bpf+0x667/0x7a0 kernel/bpf/syscall.c:5669
__do_sys_bpf kernel/bpf/syscall.c:5794 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5792 [inline]
__x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5792
x64_sys_call+0x86c/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:322
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
value changed: 0x000000dc -> 0x000000db
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 16261 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-09429-g61307b7be41a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
==================================================================
---
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 syzk...@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 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
syzbot found the following issue on:
HEAD commit: 61307b7be41a Merge tag 'mm-stable-2024-05-17-19-19' of git..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1470be58980000
kernel config: https://syzkaller.appspot.com/x/.config?x=1d0b9016d4db4fd0
dashboard link: https://syzkaller.appspot.com/bug?extid=3bf026c4c7ba9637aad8
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [and...@kernel.org a...@kernel.org b...@vger.kernel.org dan...@iogearbox.net edd...@gmail.com hao...@google.com john.fa...@gmail.com jo...@kernel.org kps...@kernel.org linux-...@vger.kernel.org marti...@linux.dev s...@google.com so...@kernel.org yongho...@linux.dev]
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ce096b50da29/disk-61307b7b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b3217a348f2f/vmlinux-61307b7b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/75170567b59e/bzImage-61307b7b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3bf026...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in pcpu_alloc_noprof / pcpu_block_update_hint_alloc
read-write to 0xffffffff8843146c of 4 bytes by task 16262 on cpu 1:
pcpu_update_empty_pages mm/percpu.c:602 [inline]
pcpu_block_update_hint_alloc+0x5db/0x6a0 mm/percpu.c:923
pcpu_alloc_area+0x49f/0x4d0 mm/percpu.c:1258
pcpu_alloc_noprof+0x4b7/0x10d0 mm/percpu.c:1834
bpf_map_alloc_percpu+0xad/0x210 kernel/bpf/syscall.c:466
prealloc_init+0x19f/0x470 kernel/bpf/hashtab.c:341
htab_map_alloc+0x637/0x8f0 kernel/bpf/hashtab.c:576
map_create+0x83c/0xb90 kernel/bpf/syscall.c:1333
__sys_bpf+0x667/0x7a0 kernel/bpf/syscall.c:5669
__do_sys_bpf kernel/bpf/syscall.c:5794 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5792 [inline]
__x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5792
x64_sys_call+0x86c/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:322
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
read to 0xffffffff8843146c of 4 bytes by task 16261 on cpu 0:
pcpu_alloc_noprof+0x9ae/0x10d0 mm/percpu.c:1894
bpf_map_alloc_percpu+0xad/0x210 kernel/bpf/syscall.c:466
prealloc_init+0x19f/0x470 kernel/bpf/hashtab.c:341
htab_map_alloc+0x637/0x8f0 kernel/bpf/hashtab.c:576
map_create+0x83c/0xb90 kernel/bpf/syscall.c:1333
__sys_bpf+0x667/0x7a0 kernel/bpf/syscall.c:5669
__do_sys_bpf kernel/bpf/syscall.c:5794 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5792 [inline]
__x64_sys_bpf+0x43/0x50 kernel/bpf/syscall.c:5792
x64_sys_call+0x86c/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:322
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
value changed: 0x000000dc -> 0x000000db
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 16261 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-09429-g61307b7be41a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
==================================================================
---
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 syzk...@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 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
syzbot
Jun 8, 2024, 4:07:27 PMJun 8
to syzkaller-upst...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: dc772f8237f9 Merge tag 'mm-hotfixes-stable-2024-06-07-15-2..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12f66e02980000
kernel config: https://syzkaller.appspot.com/x/.config?x=8c00b51a1d411353
CC: [core...@netfilter.org da...@davemloft.net edum...@google.com kad...@netfilter.org ku...@kernel.org linux-...@vger.kernel.org net...@vger.kernel.org netfilt...@vger.kernel.org pab...@redhat.com pa...@netfilter.org]
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/133d4e181c89/disk-dc772f82.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/778a0ab0a155/vmlinux-dc772f82.xz
kernel image: https://storage.googleapis.com/syzbot-assets/466ebf141278/bzImage-dc772f82.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3bf026...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in pcpu_alloc_noprof / pcpu_block_update_hint_alloc
read-write to 0xffffffff8841e6ac of 4 bytes by task 3190 on cpu 1:
pcpu_alloc_noprof+0x4b3/0x10c0 mm/percpu.c:1834
xt_percpu_counter_alloc+0x79/0x110 net/netfilter/x_tables.c:1931
find_check_entry net/ipv6/netfilter/ip6_tables.c:545 [inline]
translate_table+0x9b1/0x1040 net/ipv6/netfilter/ip6_tables.c:733
do_replace net/ipv6/netfilter/ip6_tables.c:1154 [inline]
do_ip6t_set_ctl+0x7cc/0x8c0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x195/0x1b0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x126/0x140 net/ipv6/ipv6_sockglue.c:999
tcp_setsockopt+0x93/0xb0 net/ipv4/tcp.c:3765
sock_common_setsockopt+0x64/0x80 net/core/sock.c:3726
do_sock_setsockopt net/socket.c:2312 [inline]
__sys_setsockopt+0x1d8/0x250 net/socket.c:2335
__do_sys_setsockopt net/socket.c:2344 [inline]
__se_sys_setsockopt net/socket.c:2341 [inline]
__x64_sys_setsockopt+0x66/0x80 net/socket.c:2341
x64_sys_call+0x1183/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:55
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
read to 0xffffffff8841e6ac of 4 bytes by task 3196 on cpu 0:
pcpu_alloc_noprof+0x9a7/0x10c0 mm/percpu.c:1894
mm_alloc_cid_noprof include/linux/mm_types.h:1172 [inline]
mm_init+0x47f/0x6f0 kernel/fork.c:1301
dup_mm kernel/fork.c:1685 [inline]
copy_mm+0x11e/0x11d0 kernel/fork.c:1737
copy_process+0xee1/0x1f90 kernel/fork.c:2390
kernel_clone+0x16a/0x570 kernel/fork.c:2797
__do_sys_clone kernel/fork.c:2940 [inline]
__se_sys_clone kernel/fork.c:2924 [inline]
__x64_sys_clone+0xe8/0x120 kernel/fork.c:2924
x64_sys_call+0x23e7/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:57
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
value changed: 0x0000000c -> 0x0000000b
Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 3196 Comm: syz-executor.4 Not tainted 6.10.0-rc2-syzkaller-00315-gdc772f8237f9 #0
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: dc772f8237f9 Merge tag 'mm-hotfixes-stable-2024-06-07-15-2..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12f66e02980000
kernel config: https://syzkaller.appspot.com/x/.config?x=8c00b51a1d411353
dashboard link: https://syzkaller.appspot.com/bug?extid=3bf026c4c7ba9637aad8
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11b343fc980000
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [core...@netfilter.org da...@davemloft.net edum...@google.com kad...@netfilter.org ku...@kernel.org linux-...@vger.kernel.org net...@vger.kernel.org netfilt...@vger.kernel.org pab...@redhat.com pa...@netfilter.org]
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/133d4e181c89/disk-dc772f82.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/778a0ab0a155/vmlinux-dc772f82.xz
kernel image: https://storage.googleapis.com/syzbot-assets/466ebf141278/bzImage-dc772f82.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3bf026...@syzkaller.appspotmail.com
==================================================================
BUG: KCSAN: data-race in pcpu_alloc_noprof / pcpu_block_update_hint_alloc
pcpu_update_empty_pages mm/percpu.c:602 [inline]
pcpu_block_update_hint_alloc+0x5db/0x6a0 mm/percpu.c:923
pcpu_alloc_area+0x488/0x4b0 mm/percpu.c:1258
pcpu_block_update_hint_alloc+0x5db/0x6a0 mm/percpu.c:923
pcpu_alloc_noprof+0x4b3/0x10c0 mm/percpu.c:1834
xt_percpu_counter_alloc+0x79/0x110 net/netfilter/x_tables.c:1931
find_check_entry net/ipv6/netfilter/ip6_tables.c:545 [inline]
translate_table+0x9b1/0x1040 net/ipv6/netfilter/ip6_tables.c:733
do_replace net/ipv6/netfilter/ip6_tables.c:1154 [inline]
do_ip6t_set_ctl+0x7cc/0x8c0 net/ipv6/netfilter/ip6_tables.c:1644
nf_setsockopt+0x195/0x1b0 net/netfilter/nf_sockopt.c:101
ipv6_setsockopt+0x126/0x140 net/ipv6/ipv6_sockglue.c:999
tcp_setsockopt+0x93/0xb0 net/ipv4/tcp.c:3765
sock_common_setsockopt+0x64/0x80 net/core/sock.c:3726
do_sock_setsockopt net/socket.c:2312 [inline]
__sys_setsockopt+0x1d8/0x250 net/socket.c:2335
__do_sys_setsockopt net/socket.c:2344 [inline]
__se_sys_setsockopt net/socket.c:2341 [inline]
__x64_sys_setsockopt+0x66/0x80 net/socket.c:2341
x64_sys_call+0x1183/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:55
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
read to 0xffffffff8841e6ac of 4 bytes by task 3196 on cpu 0:
pcpu_alloc_noprof+0x9a7/0x10c0 mm/percpu.c:1894
mm_alloc_cid_noprof include/linux/mm_types.h:1172 [inline]
mm_init+0x47f/0x6f0 kernel/fork.c:1301
dup_mm kernel/fork.c:1685 [inline]
copy_mm+0x11e/0x11d0 kernel/fork.c:1737
copy_process+0xee1/0x1f90 kernel/fork.c:2390
kernel_clone+0x16a/0x570 kernel/fork.c:2797
__do_sys_clone kernel/fork.c:2940 [inline]
__se_sys_clone kernel/fork.c:2924 [inline]
__x64_sys_clone+0xe8/0x120 kernel/fork.c:2924
x64_sys_call+0x23e7/0x2d70 arch/x86/include/generated/asm/syscalls_64.h:57
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xc9/0x1c0 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
value changed: 0x0000000c -> 0x0000000b
Reported by Kernel Concurrency Sanitizer on:
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
==================================================================
---
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.
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