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Message-ID: <00000000000025a04405fa6c69a0@google.com> Date: Fri, 28 Apr 2023 14:46:51 -0700 From: syzbot <syzbot+b94704ab726aaea4a3a3@...kaller.appspotmail.com> To: linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] upstream boot error: Internal error in corrupted Hello, syzbot found the following issue on: HEAD commit: 6e98b09da931 Merge tag 'net-next-6.4' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13053240280000 kernel config: https://syzkaller.appspot.com/x/.config?x=5d0e7ab221001b97 dashboard link: https://syzkaller.appspot.com/bug?extid=b94704ab726aaea4a3a3 compiler: arm-linux-gnueabi-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b94704ab726aaea4a3a3@...kaller.appspotmail.com Initmem setup node 0 [mem 0x0000000080000000-0x00000000ffffffff] percpu: Embedded 18 pages/cpu s44168 r8192 d21368 u73728 Built 1 zonelists, mobility grouping on. Total pages: 520868 Kernel command line: root=/dev/vda console=ttyAMA0 earlyprintk=serial net.ifnames=0 sysctl.kernel.hung_task_all_cpu_backtrace=1 ima_policy=tcb nf-conntrack-ftp.ports=20000 nf-conntrack-tftp.ports=20000 nf-conntrack-sip.ports=20000 nf-conntrack-irc.ports=20000 nf-conntrack-sane.ports=20000 binder.debug_mask=0 rcupdate.rcu_expedited=1 rcupdate.rcu_cpu_stall_cputime=1 no_hash_pointers page_owner=on sysctl.vm.nr_hugepages=4 sysctl.vm.nr_overcommit_hugepages=4 secretmem.enable=1 sysctl.max_rcu_stall_to_panic=1 msr.allow_writes=off coredump_filter=0xffff root=/dev/vda console=ttyAMA0 vmalloc=512M smp.csd_lock_timeout=300000 watchdog_thresh=165 workqueue.watchdog_thresh=420 sysctl.net.core.netdev_unregister_timeout_secs=420 dummy_hcd.num=2 panic_on_warn=1 Unknown kernel command line parameters "earlyprintk=serial page_owner=on", will be passed to user space. Dentry cache hash table entries: 262144 (order: 8, 1048576 bytes, linear) Inode-cache hash table entries: 131072 (order: 7, 524288 bytes, linear) allocated 2097152 bytes of page_ext mem auto-init: stack:off, heap alloc:on, heap free:off software IO TLB: area num 2. software IO TLB: mapped [mem 0x00000000d9a49000-0x00000000dda49000] (64MB) Memory: 1954376K/2097152K available (22528K kernel code, 2360K rwdata, 8380K rodata, 2048K init, 868K bss, 126392K reserved, 16384K cma-reserved, 524288K highmem) SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 trace event string verifier disabled rcu: Preemptible hierarchical RCU implementation. rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=2. rcu: RCU callback double-/use-after-free debug is enabled. All grace periods are expedited (rcu_expedited). Trampoline variant of Tasks RCU enabled. Tracing variant of Tasks RCU enabled. rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies. rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2 NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16 GIC physical location is 0x2c001000 rcu: srcu_init: Setting srcu_struct sizes based on contention. sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns clocksource: arm,sp804: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275 ns arch_timer: cp15 timer(s) running at 62.50MHz (virt). clocksource: arch_sys_counter: mask: 0x1ffffffffffffff max_cycles: 0x1cd42e208c, max_idle_ns: 881590405314 ns sched_clock: 57 bits at 63MHz, resolution 16ns, wraps every 4398046511096ns Switching to timer-based delay loop, resolution 16ns Console: colour dummy device 80x30 Calibrating delay loop (skipped), value calculated using timer frequency.. 125.00 BogoMIPS (lpj=625000) pid_max: default: 32768 minimum: 301 LSM: initializing lsm=lockdown,capability,landlock,yama,safesetid,tomoyo,selinux,bpf,integrity landlock: Up and running. Yama: becoming mindful. TOMOYO Linux initialized SELinux: Initializing. LSM support for eBPF active stackdepot: allocating hash table of 131072 entries via kvcalloc Mount-cache hash table entries: 4096 (order: 2, 16384 bytes, linear) Mountpoint-cache hash table entries: 4096 (order: 2, 16384 bytes, linear) CPU: Testing write buffer coherency: ok CPU0: Spectre BHB: enabling loop workaround for all CPUs CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 Insufficient stack space to handle exception! Task stack: [0xdf85c000..0xdf85e000] IRQ stack: [0xdf804000..0xdf806000] Overflow stack: [0x82a14000..0x82a15000] Internal error: kernel stack overflow: 0 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.3.0-syzkaller #0 Hardware name: ARM-Versatile Express PC is at 0x0 LR is at debug_smp_processor_id+0x20/0x24 lib/smp_processor_id.c:60 pc : [<00000000>] lr : [<817ec4c8>] psr: 20000193 sp : 00000000 ip : df805f80 fp : 00000000 r10: 825e0afd r9 : 828fb980 r8 : 00000000 r7 : 00000000 r6 : 00000000 r5 : 00000000 r4 : 00000000 r3 : 00000001 r2 : 817eb958 r1 : 81d982d4 r0 : 00000001 Flags: nzCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 80003000 DAC: 00000000 Register r0 information: non-paged memory Register r1 information: non-slab/vmalloc memory Register r2 information: non-slab/vmalloc memory Register r3 information: non-paged memory Register r4 information: NULL pointer Register r5 information: NULL pointer Register r6 information: NULL pointer Register r7 information: NULL pointer Register r8 information: NULL pointer Register r9 information: ------------[ cut here ]------------ WARNING: CPU: 1 PID: 0 at mm/slub.c:4650 __kmem_obj_info+0x1c4/0x21c mm/slub.c:4650 Modules linked in: --- 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 syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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