Messages in this thread | | | Date | Mon, 06 Aug 2018 08:42:02 -0700 | Subject | Re: WARNING in try_charge | From | syzbot <> |
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Hello,
syzbot has tested the proposed patch but the reproducer still triggered crash: WARNING in try_charge
Killed process 6410 (syz-executor5) total-vm:37708kB, anon-rss:2128kB, file-rss:0kB, shmem-rss:0kB oom_reaper: reaped process 6410 (syz-executor5), now anon-rss:0kB, file-rss:0kB, shmem-rss:0kB task=syz-executor5 pid=6410 invoked memcg oom killer. oom_victim=1 ------------[ cut here ]------------ Memory cgroup charge failed because of no reclaimable memory! This looks like a misconfiguration or a kernel bug. WARNING: CPU: 1 PID: 6410 at mm/memcontrol.c:1707 mem_cgroup_oom mm/memcontrol.c:1706 [inline] WARNING: CPU: 1 PID: 6410 at mm/memcontrol.c:1707 try_charge+0x734/0x1680 mm/memcontrol.c:2264 Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 6410 Comm: syz-executor5 Not tainted 4.18.0-rc7-next-20180803+ #1 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 panic+0x238/0x4e7 kernel/panic.c:184 __warn.cold.8+0x163/0x1ba kernel/panic.c:536 report_bug+0x252/0x2d0 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:996 RIP: 0010:mem_cgroup_oom mm/memcontrol.c:1706 [inline] RIP: 0010:try_charge+0x734/0x1680 mm/memcontrol.c:2264 Code: 85 b8 04 00 00 8b b5 c8 fd ff ff 44 89 f2 4c 89 ff e8 00 51 ff ff 84 c0 0f 85 31 08 00 00 48 c7 c7 c0 17 13 87 e8 8c fd 85 ff <0f> 0b 48 8d 95 f8 fd ff ff 48 8b b5 c0 fd ff ff 48 b8 00 00 00 00 RSP: 0018:ffff8801be6ef580 EFLAGS: 00010286 RAX: 0000000000000000 RBX: ffff8801afab4c00 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff816366f1 RDI: ffff8801be6ef270 RBP: ffff8801be6ef810 R08: ffff8801bcf48140 R09: fffffbfff0ff1238 R10: fffffbfff0ff1238 R11: ffffffff87f891c3 R12: dffffc0000000000 R13: ffff8801be6ef7e8 R14: 0000000000000000 R15: ffff8801afab4c00 mem_cgroup_try_charge+0x4ff/0xa70 mm/memcontrol.c:5916 mem_cgroup_try_charge_delay+0x1d/0x90 mm/memcontrol.c:5931 do_anonymous_page mm/memory.c:3166 [inline] handle_pte_fault mm/memory.c:3971 [inline] __handle_mm_fault+0x25be/0x4470 mm/memory.c:4097 handle_mm_fault+0x53e/0xc80 mm/memory.c:4134 __do_page_fault+0x620/0xe50 arch/x86/mm/fault.c:1395 do_page_fault+0xf6/0x8c0 arch/x86/mm/fault.c:1470 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1164 RIP: 0033:0x40e33f Code: Bad RIP value. RSP: 002b:00007ffe221246e0 EFLAGS: 00010206 RAX: 00007fb83d11b000 RBX: 0000000000020000 RCX: 0000000000456b7a RDX: 0000000000021000 RSI: 0000000000021000 RDI: 0000000000000000 RBP: 00007ffe221247c0 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe221248b0 R13: 00007fb83d13b700 R14: 0000000000000005 R15: 0000000000000001 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..
Tested on:
commit: 116b181bb646 Add linux-next specific files for 20180803 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git console output: https://syzkaller.appspot.com/x/log.txt?x=12447864400000 kernel config: https://syzkaller.appspot.com/x/.config?x=b4f38be7c2c519d5 compiler: gcc (GCC) 8.0.1 20180413 (experimental) patch: https://syzkaller.appspot.com/x/patch.diff?x=14c5b68c400000
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