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: 1557 Comm: kworker/0:3 Not tainted 6.1.0-rc1-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 : [<80810174>] lr : [<817563c4>] psr: 20000013 sp : ead35e28 ip : ead35e18 fp : ead35e4c r10: 83f17e08 r9 : 7fffffff r8 : 850c04ec r7 : 7fffffff r6 : ffffffff r5 : 83f17e08 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: 84091500 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 83f17c00 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 850c0480 pointer offset 108 size 192 Register r9 information: non-paged memory Register r10 information: slab kmalloc-cg-1k start 83f17c00 pointer offset 520 size 1024 Register r11 information: 2-page vmalloc region starting at 0xead34000 allocated at kernel_clone+0x9c/0x3f4 kernel/fork.c:2671 Register r12 information: 2-page vmalloc region starting at 0xead34000 allocated at kernel_clone+0x9c/0x3f4 kernel/fork.c:2671 Process kworker/0:3 (pid: 1557, stack limit = 0xead34000) Stack: (0xead35e28 to 0xead36000) 5e20: 85b4c380 850d8a00 850c0480 83f17c00 850c04ec 7fffffff 5e40: ead35e94 ead35e50 80663798 80810148 7fffffff 802a0f18 00000001 00000001 5e60: ead35e5c 3bc2be8c 83f17cb8 00000001 83f17cb8 00000001 83f17c00 806636c8 5e80: 00000000 850c0480 ead35ecc ead35e98 8066ec68 806636d4 ead35ebc 83f17ca0 5ea0: 808100c8 83f17c00 00000000 dddd4a40 dddd8200 00000010 83d4d080 dddd8215 5ec0: ead35ee4 ead35ed0 80664ca8 8066ec00 83f17c00 00000000 ead35efc ead35ee8 5ee0: 8066e794 80664c80 8232cd6c 83f34400 ead35f44 ead35f00 802611c0 8066e71c 5f00: 80275518 802a0f18 ead35f2c ead35f18 80262ea4 00000000 dddd4a40 83f34400 5f20: dddd4a40 83f34418 dddd4a5c 82204d40 00000008 dddd4a40 ead35f84 ead35f48 5f40: 802615cc 80260fc0 ead35f64 81cffd70 823d7b0e 83d4d080 ead35f84 83f36240 5f60: 83d4d080 80261560 83f34400 83f36300 df835e8c 00000000 ead35fac ead35f88 5f80: 80269b24 8026156c 83f36240 80269a38 00000000 00000000 00000000 00000000 5fa0: 00000000 ead35fb0 80200100 80269a44 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 Backtrace: [<8081013c>] (percpu_counter_add_batch) from [<80663798>] (percpu_counter_add_local include/linux/percpu_counter.h:75 [inline]) [<8081013c>] (percpu_counter_add_batch) from [<80663798>] (percpu_counter_sub_local include/linux/percpu_counter.h:225 [inline]) [<8081013c>] (percpu_counter_add_batch) from [<80663798>] (freeque+0xd0/0x16c ipc/msg.c:289) r9:7fffffff r8:850c04ec r7:83f17c00 r6:850c0480 r5:850d8a00 r4:85b4c380 [<806636c8>] (freeque) from [<8066ec68>] (free_ipcs+0x74/0x90 ipc/namespace.c:125) r10:850c0480 r9:00000000 r8:806636c8 r7:83f17c00 r6:00000001 r5:83f17cb8 r4:00000001 [<8066ebf4>] (free_ipcs) from [<80664ca8>] (msg_exit_ns+0x34/0x48 ipc/msg.c:1334) r10:dddd8215 r9:83d4d080 r8:00000010 r7:dddd8200 r6:dddd4a40 r5:00000000 r4:83f17c00 [<80664c74>] (msg_exit_ns) from [<8066e794>] (free_ipc_ns ipc/namespace.c:138 [inline]) [<80664c74>] (msg_exit_ns) from [<8066e794>] (free_ipc+0x84/0xfc ipc/namespace.c:157) r5:00000000 r4:83f17c00 [<8066e710>] (free_ipc) from [<802611c0>] (process_one_work+0x20c/0x5ac kernel/workqueue.c:2289) r5:83f34400 r4:8232cd6c [<80260fb4>] (process_one_work) from [<802615cc>] (worker_thread+0x6c/0x4e0 kernel/workqueue.c:2436) r10:dddd4a40 r9:00000008 r8:82204d40 r7:dddd4a5c r6:83f34418 r5:dddd4a40 r4:83f34400 [<80261560>] (worker_thread) from [<80269b24>] (kthread+0xec/0x11c kernel/kthread.c:376) r10:00000000 r9:df835e8c r8:83f36300 r7:83f34400 r6:80261560 r5:83d4d080 r4:83f36240 [<80269a38>] (kthread) from [<80200100>] (ret_from_fork+0x14/0x34 arch/arm/kernel/entry-common.S:148) Exception stack(0xead35fb0 to 0xead35ff8) 5fa0: 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:80269a38 r4:83f36240 Code: e34801ec eb3d188e e5951018 ee1d3f90 (e7918003) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e34801ec movt r0, #33260 ; 0x81ec 4: eb3d188e bl 0xf46244 8: e5951018 ldr r1, [r5, #24] c: ee1d3f90 mrc 15, 0, r3, cr13, cr0, {4} * 10: e7918003 ldr r8, [r1, r3] <-- trapping instruction