Messages in this thread | | | Date | Fri, 10 Jul 2020 09:44:21 -0700 | Subject | WARNING in kmem_cache_free_bulk | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: 7cc2a8ea Merge tag 'block-5.8-2020-07-01' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=14258fe3100000 kernel config: https://syzkaller.appspot.com/x/.config?x=7be693511b29b338 dashboard link: https://syzkaller.appspot.com/bug?extid=c07ac923fbf6351f6063 compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+c07ac923fbf6351f6063@syzkaller.appspotmail.com
------------[ cut here ]------------ virt_to_cache: Object is not a Slab page! WARNING: CPU: 1 PID: 8538 at mm/slab.h:475 virt_to_cache mm/slab.h:475 [inline] WARNING: CPU: 1 PID: 8538 at mm/slab.h:475 cache_from_obj mm/slab.h:522 [inline] WARNING: CPU: 1 PID: 8538 at mm/slab.h:475 cache_from_obj mm/slab.h:506 [inline] WARNING: CPU: 1 PID: 8538 at mm/slab.h:475 kmem_cache_free_bulk+0x23e/0x290 mm/slab.c:3713 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 8538 Comm: kworker/1:2 Not tainted 5.8.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events kfree_rcu_work Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:231 __warn.cold+0x20/0x45 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563 RIP: 0010:virt_to_cache mm/slab.h:475 [inline] RIP: 0010:cache_from_obj mm/slab.h:522 [inline] RIP: 0010:cache_from_obj mm/slab.h:506 [inline] RIP: 0010:kmem_cache_free_bulk+0x23e/0x290 mm/slab.c:3713 Code: fe ff ff 80 3d 96 a0 f6 08 00 0f 85 6d fe ff ff 48 c7 c6 e0 f1 55 88 48 c7 c7 08 18 69 89 c6 05 7b a0 f6 08 01 e8 d4 1d 92 ff <0f> 0b e9 4c fe ff ff 48 8b 47 08 48 c7 c6 d0 17 69 89 48 8d 50 ff RSP: 0018:ffffc90004617c78 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff888092772580 RSI: ffffffff815d4f87 RDI: fffff520008c2f81 RBP: ffff888000000000 R08: 0000000000000001 R09: ffff8880ae720fcb R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880ae7253b0 R14: ffff888000152008 R15: 0000000000000000 kfree_bulk include/linux/slab.h:412 [inline] kfree_rcu_work+0x1a1/0x470 kernel/rcu/tree.c:3069 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3b5/0x4a0 kernel/kthread.c:291 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293 Kernel Offset: disabled Rebooting in 86400 seconds..
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