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WARNING in kvmalloc_node

Status: fixed on 2018/02/26 20:04
Subsystems: bpf net
[Documentation on labels]
Reported-by: syzbot+1a240cdb1f4cc88819df@syzkaller.appspotmail.com
Fix commit: 7fc17e909edf bpf: cpumap: use GFP_KERNEL instead of GFP_ATOMIC in __cpu_map_entry_alloc()
First crash: 2541d, last: 2534d
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH 4.15 000/146] 4.15.10-stable review 160 (160) 2018/03/15 10:19
WARNING in kvmalloc_node 11 (12) 2018/02/14 19:20
[PATCH net] bpf: cpumap: use GFP_KERNEL instead of GFP_ATOMIC in __cpu_map_entry_alloc() 8 (8) 2018/02/14 17:58

Sample crash report:
audit: type=1400 audit(1518457683.474:7): avc:  denied  { map } for  pid=4183 comm="syzkaller238030" path="/root/syzkaller238030826" dev="sda1" ino=16481 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1
WARNING: CPU: 1 PID: 4183 at mm/util.c:403 kvmalloc_node+0xc3/0xd0 mm/util.c:403
audit: type=1400 audit(1518457683.474:8): avc:  denied  { map_create } for  pid=4183 comm="syzkaller238030" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 4183 Comm: syzkaller238030 Not tainted 4.16.0-rc1+ #12
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:53
audit: type=1400 audit(1518457683.474:9): avc:  denied  { map_read map_write } for  pid=4183 comm="syzkaller238030" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=bpf permissive=1
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1dc/0x200 kernel/panic.c:547
 report_bug+0x211/0x2d0 lib/bug.c:184
 fixup_bug.part.11+0x37/0x80 arch/x86/kernel/traps.c:178
 fixup_bug arch/x86/kernel/traps.c:247 [inline]
 do_error_trap+0x2d7/0x3e0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:315
 invalid_op+0x22/0x40 arch/x86/entry/entry_64.S:988
RIP: 0010:kvmalloc_node+0xc3/0xd0 mm/util.c:403
RSP: 0018:ffff8801b436f6e8 EFLAGS: 00010293
RAX: ffff8801b1dd25c0 RBX: 0000000001088220 RCX: ffffffff81970ca3
RDX: 0000000000000000 RSI: 0000000001088220 RDI: 0000000000000070
RBP: ffff8801b436f708 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000070
R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8801d304cd00
 kvmalloc include/linux/mm.h:541 [inline]
 kvmalloc_array include/linux/mm.h:557 [inline]
 __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:474 [inline]
 ptr_ring_init include/linux/ptr_ring.h:492 [inline]
 __cpu_map_entry_alloc kernel/bpf/cpumap.c:359 [inline]
 cpu_map_update_elem+0x3c3/0x8e0 kernel/bpf/cpumap.c:490
 map_update_elem kernel/bpf/syscall.c:698 [inline]
 SYSC_bpf kernel/bpf/syscall.c:1872 [inline]
 SyS_bpf+0x215f/0x4860 kernel/bpf/syscall.c:1843
 do_syscall_64+0x282/0x940 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x26/0x9b
RIP: 0033:0x43fda9
RSP: 002b:00007ffe6b075798 EFLAGS: 00000203 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 000000000043fda9
RDX: 0000000000000020 RSI: 0000000020ef4fe0 RDI: 0000000000000002
RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000203 R12: 00000000004016d0
R13: 0000000000401760 R14: 0000000000000000 R15: 0000000000000000
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (513):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/02/12 17:50 bpf-next 7928b2cbe55b 88bc17df .config console log report syz C ci-upstream-bpf-next-kasan-gce
2018/02/20 00:18 bpf-next 0b6b8a3dd86d c1f526e3 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 05:39 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 05:37 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 05:35 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 05:33 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 05:25 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 05:18 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 05:11 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 05:05 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:56 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:55 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:54 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:50 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:50 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:49 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:41 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:35 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:22 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:21 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:05 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 04:01 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:46 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:46 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:45 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:38 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:20 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:20 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:16 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:14 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:08 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 03:03 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 02:55 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 02:26 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 02:21 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 02:15 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 02:09 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 01:58 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 01:54 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 01:51 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/15 01:48 bpf-next 615a94749857 17061fc0 .config console log report ci-upstream-bpf-next-kasan-gce
2018/02/12 17:33 bpf-next 7928b2cbe55b 88bc17df .config console log report ci-upstream-bpf-next-kasan-gce
* Struck through repros no longer work on HEAD.