8<--- cut here --- Unable to handle kernel paging request at virtual address 5bd2a000 [5bd2a000] *pgd=80000080005003, *pmd=00000000 Internal error: Oops: 206 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 7183 Comm: kworker/0:4 Not tainted 6.1.0-rc2-syzkaller #0 Hardware name: ARM-Versatile Express Workqueue: events free_ipc PC is at percpu_counter_add_batch+0x38/0x108 lib/percpu_counter.c:87 LR is at __this_cpu_preempt_check+0x1c/0x20 lib/smp_processor_id.c:66 pc : [<808101f4>] lr : [<81756544>] psr: 20000013 sp : eb9e1e28 ip : eb9e1e18 fp : eb9e1e4c r10: 840b6608 r9 : 7fffffff r8 : 8a432bac r7 : 7fffffff r6 : ffffffff r5 : 840b6608 r4 : ffffffff r3 : 5bd2a000 r2 : ffffffff r1 : 00000000 r0 : 00000000 Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 30c5387d Table: 843cab00 DAC: fffffffd Register r0 information: NULL pointer Register r1 information: NULL pointer Register r2 information: non-paged memory Register r3 information: non-paged memory Register r4 information: non-paged memory Register r5 information: slab kmalloc-cg-1k start 840b6400 pointer offset 520 size 1024 Register r6 information: non-paged memory Register r7 information: non-paged memory Register r8 information: slab kmalloc-cg-192 start 8a432b40 pointer offset 108 size 192 Register r9 information: non-paged memory Register r10 information: slab kmalloc-cg-1k start 840b6400 pointer offset 520 size 1024 Register r11 information: 2-page vmalloc region starting at 0xeb9e0000 allocated at kernel_clone+0x9c/0x3f4 kernel/fork.c:2671 Register r12 information: 2-page vmalloc region starting at 0xeb9e0000 allocated at kernel_clone+0x9c/0x3f4 kernel/fork.c:2671 Process kworker/0:4 (pid: 7183, stack limit = 0xeb9e0000) Stack: (0xeb9e1e28 to 0xeb9e2000) 1e20: 8508e680 8508e4c0 8a432b40 840b6400 8a432bac 7fffffff 1e40: eb9e1e94 eb9e1e50 80663818 808101c8 7fffffff 802a0f18 00000095 00000001 1e60: eb9e1e5c 9152bd99 840b64b8 00000001 840b64b8 00000095 840b6400 80663748 1e80: 00000000 8a432b40 eb9e1ecc eb9e1e98 8066ece8 80663754 eb9e1ebc 840b64a0 1ea0: 80810148 840b6400 00000000 dddd4a40 dddd8200 00000010 82a78000 dddd8215 1ec0: eb9e1ee4 eb9e1ed0 80664d28 8066ec80 840b6400 00000000 eb9e1efc eb9e1ee8 1ee0: 8066e814 80664d00 8232cd6c 84fc3300 eb9e1f44 eb9e1f00 802611c0 8066e79c 1f00: 80275518 802a0f18 eb9e1f2c eb9e1f18 80262ea4 00000000 dddd4a40 84fc3300 1f20: dddd4a40 84fc3318 dddd4a5c 82204d40 00000008 dddd4a40 eb9e1f84 eb9e1f48 1f40: 802615cc 80260fc0 eb9e1f64 81cffdc0 823d7b0e 82a78000 eb9e1f84 8a45fec0 1f60: 82a78000 80261560 84fc3300 8a45f040 df9b1e8c 00000000 eb9e1fac eb9e1f88 1f80: 80269b24 8026156c 8a45fec0 80269a38 00000000 00000000 00000000 00000000 1fa0: 00000000 eb9e1fb0 80200100 80269a44 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 Backtrace: [<808101bc>] (percpu_counter_add_batch) from [<80663818>] (percpu_counter_add_local include/linux/percpu_counter.h:75 [inline]) [<808101bc>] (percpu_counter_add_batch) from [<80663818>] (percpu_counter_sub_local include/linux/percpu_counter.h:225 [inline]) [<808101bc>] (percpu_counter_add_batch) from [<80663818>] (freeque+0xd0/0x16c ipc/msg.c:289) r9:7fffffff r8:8a432bac r7:840b6400 r6:8a432b40 r5:8508e4c0 r4:8508e680 [<80663748>] (freeque) from [<8066ece8>] (free_ipcs+0x74/0x90 ipc/namespace.c:125) r10:8a432b40 r9:00000000 r8:80663748 r7:840b6400 r6:00000095 r5:840b64b8 r4:00000001 [<8066ec74>] (free_ipcs) from [<80664d28>] (msg_exit_ns+0x34/0x48 ipc/msg.c:1334) r10:dddd8215 r9:82a78000 r8:00000010 r7:dddd8200 r6:dddd4a40 r5:00000000 r4:840b6400 [<80664cf4>] (msg_exit_ns) from [<8066e814>] (free_ipc_ns ipc/namespace.c:138 [inline]) [<80664cf4>] (msg_exit_ns) from [<8066e814>] (free_ipc+0x84/0xfc ipc/namespace.c:157) r5:00000000 r4:840b6400 [<8066e790>] (free_ipc) from [<802611c0>] (process_one_work+0x20c/0x5ac kernel/workqueue.c:2289) r5:84fc3300 r4:8232cd6c [<80260fb4>] (process_one_work) from [<802615cc>] (worker_thread+0x6c/0x4e0 kernel/workqueue.c:2436) r10:dddd4a40 r9:00000008 r8:82204d40 r7:dddd4a5c r6:84fc3318 r5:dddd4a40 r4:84fc3300 [<80261560>] (worker_thread) from [<80269b24>] (kthread+0xec/0x11c kernel/kthread.c:376) r10:00000000 r9:df9b1e8c r8:8a45f040 r7:84fc3300 r6:80261560 r5:82a78000 r4:8a45fec0 [<80269a38>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:148) Exception stack(0xeb9e1fb0 to 0xeb9e1ff8) 1fa0: 00000000 00000000 00000000 00000000 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80269a38 r4:8a45fec0 Code: e34801ec eb3d18ce e5951018 ee1d3f90 (e7918003) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e34801ec movt r0, #33260 ; 0x81ec 4: eb3d18ce bl 0xf46344 8: e5951018 ldr r1, [r5, #24] c: ee1d3f90 mrc 15, 0, r3, cr13, cr0, {4} * 10: e7918003 ldr r8, [r1, r3] <-- trapping instruction