syzbot


WARNING in cache_grow_begin
Status: fixed on 2022/03/08 16:11
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: c12837d1bb31 ref_tracker: use __GFP_NOFAIL more carefully
First crash: 121d, last: 121d

Sample crash report:
ICMPv6: ndisc: ndisc_alloc_skb failed to allocate an skb
------------[ cut here ]------------
WARNING: CPU: 1 PID: 0 at mm/page_alloc.c:5098 __alloc_pages_slowpath.constprop.0+0x1b7b/0x20d0 mm/page_alloc.c:5098
Modules linked in:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.16.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:__alloc_pages_slowpath.constprop.0+0x1b7b/0x20d0 mm/page_alloc.c:5098
Code: 90 08 00 00 48 81 c7 d8 04 00 00 48 89 f8 48 c1 e8 03 42 80 3c 30 00 0f 84 f0 ea ff ff e8 9d 30 09 00 e9 e6 ea ff ff 4d 89 fd <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 30 48 c1 ea 03 80
RSP: 0000:ffffc90000728488 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff88801191e180 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88801191f410
RBP: ffff88803fffc300 R08: 000000000000107b R09: 0000000000001062
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffc900007286b8 R14: dffffc0000000000 R15: ffffc900007286b8
FS:  0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f019e4d1210 CR3: 000000000b88e000 CR4: 0000000000150ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __alloc_pages+0x412/0x500 mm/page_alloc.c:5399
 __alloc_pages_node include/linux/gfp.h:572 [inline]
 kmem_getpages mm/slab.c:1378 [inline]
 cache_grow_begin+0x75/0x350 mm/slab.c:2584
 fallback_alloc+0x1e4/0x2e0 mm/slab.c:3132
 __do_cache_alloc mm/slab.c:3274 [inline]
 slab_alloc mm/slab.c:3308 [inline]
 kmem_cache_alloc_trace+0x309/0x4a0 mm/slab.c:3565
 kmalloc include/linux/slab.h:581 [inline]
 kzalloc include/linux/slab.h:715 [inline]
 ref_tracker_alloc+0xe7/0x440 lib/ref_tracker.c:74
 netdev_tracker_alloc include/linux/netdevice.h:3859 [inline]
 dev_hold_track include/linux/netdevice.h:3876 [inline]
 dst_init+0xe0/0x520 net/core/dst.c:52
 dst_alloc+0x16b/0x1f0 net/core/dst.c:96
 ip6_dst_alloc+0x2e/0x100 net/ipv6/route.c:340
 icmp6_dst_alloc+0x6d/0x6c0 net/ipv6/route.c:3271
 ndisc_send_skb+0x1146/0x17f0 net/ipv6/ndisc.c:488
 ndisc_send_rs+0x12e/0x6f0 net/ipv6/ndisc.c:702
 addrconf_rs_timer+0x3f2/0x820 net/ipv6/addrconf.c:3898
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers.part.0+0x67c/0xa30 kernel/time/timer.c:1734
 __run_timers kernel/time/timer.c:1715 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:637
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:649
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:default_idle+0xb/0x10 arch/x86/kernel/process.c:734
Code: ff ff e8 08 09 6f f8 e9 24 fe ff ff e8 fe 1e fd ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc eb 07 0f 00 2d 77 2b 57 00 fb f4 <c3> 0f 1f 40 00 41 54 be 08 00 00 00 53 65 48 8b 1c 25 00 70 02 00
RSP: 0000:ffffc9000065fdf8 EFLAGS: 00000206
RAX: 0000000000122699 RBX: ffff88801191e180 RCX: ffffffff894c5ca1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000001 R09: ffff88802cb3ac93
R10: ffffed1005967592 R11: 0000000000000000 R12: ffffed1002323c30
R13: 0000000000000001 R14: ffffffff8d942a10 R15: 0000000000000000
 default_idle_call+0x87/0xd0 kernel/sched/idle.c:112
 cpuidle_idle_call kernel/sched/idle.c:194 [inline]
 do_idle+0x401/0x590 kernel/sched/idle.c:306
 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:403
 start_secondary+0x265/0x340 arch/x86/kernel/smpboot.c:272
 secondary_startup_64_no_verify+0xc3/0xcb
 </TASK>
----------------
Code disassembly (best guess), 2 bytes skipped:
   0:	e8 08 09 6f f8       	callq  0xf86f090d
   5:	e9 24 fe ff ff       	jmpq   0xfffffe2e
   a:	e8 fe 1e fd ff       	callq  0xfffd1f0d
   f:	cc                   	int3
  10:	cc                   	int3
  11:	cc                   	int3
  12:	cc                   	int3
  13:	cc                   	int3
  14:	cc                   	int3
  15:	cc                   	int3
  16:	cc                   	int3
  17:	cc                   	int3
  18:	cc                   	int3
  19:	cc                   	int3
  1a:	cc                   	int3
  1b:	cc                   	int3
  1c:	cc                   	int3
  1d:	eb 07                	jmp    0x26
  1f:	0f 00 2d 77 2b 57 00 	verw   0x572b77(%rip)        # 0x572b9d
  26:	fb                   	sti
  27:	f4                   	hlt
* 28:	c3                   	retq <-- trapping instruction
  29:	0f 1f 40 00          	nopl   0x0(%rax)
  2d:	41 54                	push   %r12
  2f:	be 08 00 00 00       	mov    $0x8,%esi
  34:	53                   	push   %rbx
  35:	65 48 8b 1c 25 00 70 	mov    %gs:0x27000,%rbx
  3c:	02 00

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-qemu-upstream 2022/01/20 08:03 upstream 1d1df41c5a33 5da9499f .config log report info WARNING in cache_grow_begin
ci-qemu-upstream 2022/01/20 06:01 upstream 1d1df41c5a33 5da9499f .config log report info WARNING in cache_grow_begin