| Message ID | 20240621114551.2061-3-yskelg@gmail.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | qdisc: fix NULL pointer dereference in perf_trace_qdisc_reset() | expand |
On 21/06/2024 08:45, yskelg@gmail.com wrote: > From: Yunseong Kim <yskelg@gmail.com> > > In the TRACE_EVENT(qdisc_reset) NULL dereference occurred from > > qdisc->dev_queue->dev <NULL> ->name > > This situation simulated from bunch of veths and Bluetooth dis/reconnection. > > During qdisc initialization, qdisc was being set to noop_queue. > In veth_init_queue, the initial tx_num was reduced back to one, > causing the qdisc reset to be called with noop, which led to the kernel panic. > > I think this will happen on the kernel version. > Linux kernel version ≥ v6.7.10, ≥ v6.8 ≥ v6.9 and 6.10 You should tag your patch for the net tree > > This occurred from 51270d573a8d. I think this patch is absolutely > necessary. Previously, It was showing not intended string value of name. Add a 'Fixes:' tag with this commit > > I've reproduced 3 time from my fedora 40 Debug Kernel with any other module > and patched. > > version: 6.10.0-0.rc2.20240608gitdc772f8237f9.29.fc41.aarch64+debug > > [ 5287.164555] veth0_vlan: left promiscuous mode > [ 5287.164929] veth1_macvtap: left promiscuous mode > [ 5287.164950] veth0_macvtap: left promiscuous mode > [ 5287.164983] veth1_vlan: left promiscuous mode > [ 5287.165008] veth0_vlan: left promiscuous mode > [ 5287.165450] veth1_macvtap: left promiscuous mode > [ 5287.165472] veth0_macvtap: left promiscuous mode > [ 5287.165502] veth1_vlan: left promiscuous mode > … > [ 5297.598240] bridge0: port 2(bridge_slave_1) entered blocking state > [ 5297.598262] bridge0: port 2(bridge_slave_1) entered forwarding state > [ 5297.598296] bridge0: port 1(bridge_slave_0) entered blocking state > [ 5297.598313] bridge0: port 1(bridge_slave_0) entered forwarding state > [ 5297.616090] 8021q: adding VLAN 0 to HW filter on device bond0 > [ 5297.620405] bridge0: port 1(bridge_slave_0) entered disabled state > [ 5297.620730] bridge0: port 2(bridge_slave_1) entered disabled state > [ 5297.627247] 8021q: adding VLAN 0 to HW filter on device team0 > [ 5297.629636] bridge0: port 1(bridge_slave_0) entered blocking state > … > [ 5298.002798] bridge_slave_0: left promiscuous mode > [ 5298.002869] bridge0: port 1(bridge_slave_0) entered disabled state > [ 5298.309444] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface > [ 5298.315206] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface > [ 5298.320207] bond0 (unregistering): Released all slaves > [ 5298.354296] hsr_slave_0: left promiscuous mode > [ 5298.360750] hsr_slave_1: left promiscuous mode > [ 5298.374889] veth1_macvtap: left promiscuous mode > [ 5298.374931] veth0_macvtap: left promiscuous mode > [ 5298.374988] veth1_vlan: left promiscuous mode > [ 5298.375024] veth0_vlan: left promiscuous mode > [ 5299.109741] team0 (unregistering): Port device team_slave_1 removed > [ 5299.185870] team0 (unregistering): Port device team_slave_0 removed > … > [ 5300.155443] Bluetooth: hci3: unexpected cc 0x0c03 length: 249 > 1 > [ 5300.155724] Bluetooth: hci3: unexpected cc 0x1003 length: 249 > 9 > [ 5300.155988] Bluetooth: hci3: unexpected cc 0x1001 length: 249 > 9 > …. > [ 5301.075531] team0: Port device team_slave_1 added > [ 5301.085515] bridge0: port 1(bridge_slave_0) entered blocking state > [ 5301.085531] bridge0: port 1(bridge_slave_0) entered disabled state > [ 5301.085588] bridge_slave_0: entered allmulticast mode > [ 5301.085800] bridge_slave_0: entered promiscuous mode > [ 5301.095617] bridge0: port 1(bridge_slave_0) entered blocking state > [ 5301.095633] bridge0: port 1(bridge_slave_0) entered disabled state > … > [ 5301.149734] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link > [ 5301.173234] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link > [ 5301.180517] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link > [ 5301.193481] hsr_slave_0: entered promiscuous mode > [ 5301.204425] hsr_slave_1: entered promiscuous mode > [ 5301.210172] debugfs: Directory 'hsr0' with parent 'hsr' already present! > [ 5301.210185] Cannot create hsr debugfs directory > [ 5301.224061] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link > [ 5301.246901] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link > [ 5301.255934] team0: Port device team_slave_0 added > [ 5301.256480] team0: Port device team_slave_1 added > [ 5301.256948] team0: Port device team_slave_0 added > … > [ 5301.435928] hsr_slave_0: entered promiscuous mode > [ 5301.446029] hsr_slave_1: entered promiscuous mode > [ 5301.455872] debugfs: Directory 'hsr0' with parent 'hsr' already present! > [ 5301.455884] Cannot create hsr debugfs directory > [ 5301.502664] hsr_slave_0: entered promiscuous mode > [ 5301.513675] hsr_slave_1: entered promiscuous mode > [ 5301.526155] debugfs: Directory 'hsr0' with parent 'hsr' already present! > [ 5301.526164] Cannot create hsr debugfs directory > [ 5301.563662] hsr_slave_0: entered promiscuous mode > [ 5301.576129] hsr_slave_1: entered promiscuous mode > [ 5301.580259] debugfs: Directory 'hsr0' with parent 'hsr' already present! > [ 5301.580270] Cannot create hsr debugfs directory > [ 5301.590269] 8021q: adding VLAN 0 to HW filter on device bond0 > > [ 5301.595872] KASAN: null-ptr-deref in range [0x0000000000000130-0x0000000000000137] > [ 5301.595877] Mem abort info: > [ 5301.595881] ESR = 0x0000000096000006 > [ 5301.595885] EC = 0x25: DABT (current EL), IL = 32 bits > [ 5301.595889] SET = 0, FnV = 0 > [ 5301.595893] EA = 0, S1PTW = 0 > [ 5301.595896] FSC = 0x06: level 2 translation fault > [ 5301.595900] Data abort info: > [ 5301.595903] ISV = 0, ISS = 0x00000006, ISS2 = 0x00000000 > [ 5301.595907] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 > [ 5301.595911] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 > [ 5301.595915] [dfff800000000026] address between user and kernel address ranges > [ 5301.595971] Internal error: Oops: 0000000096000006 [#1] SMP > … > [ 5301.596076] CPU: 2 PID: 102769 Comm: > syz-executor.3 Kdump: loaded Tainted: > G W ------- --- 6.10.0-0.rc2.20240608gitdc772f8237f9.29.fc41.aarch64+debug #1 > [ 5301.596080] Hardware name: VMware, Inc. VMware20,1/VBSA, > BIOS VMW201.00V.21805430.BA64.2305221830 05/22/2023 > [ 5301.596082] pstate: 01400005 (nzcv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) > [ 5301.596085] pc : strnlen+0x40/0x88 > [ 5301.596114] lr : trace_event_get_offsets_qdisc_reset+0x6c/0x2b0 > [ 5301.596124] sp : ffff8000beef6b40 > [ 5301.596126] x29: ffff8000beef6b40 x28: dfff800000000000 x27: 0000000000000001 > [ 5301.596131] x26: 6de1800082c62bd0 x25: 1ffff000110aa9e0 x24: ffff800088554f00 > [ 5301.596136] x23: ffff800088554ec0 x22: 0000000000000130 x21: 0000000000000140 > [ 5301.596140] x20: dfff800000000000 x19: ffff8000beef6c60 x18: ffff7000115106d8 > [ 5301.596143] x17: ffff800121bad000 x16: ffff800080020000 x15: 0000000000000006 > [ 5301.596147] x14: 0000000000000002 x13: ffff0001f3ed8d14 x12: ffff700017ddeda5 > [ 5301.596151] x11: 1ffff00017ddeda4 x10: ffff700017ddeda4 x9 : ffff800082cc5eec > [ 5301.596155] x8 : 0000000000000004 x7 : 00000000f1f1f1f1 x6 : 00000000f2f2f200 > [ 5301.596158] x5 : 00000000f3f3f3f3 x4 : ffff700017dded80 x3 : 00000000f204f1f1 > [ 5301.596162] x2 : 0000000000000026 x1 : 0000000000000000 x0 : 0000000000000130 > [ 5301.596166] Call trace: > [ 5301.596175] strnlen+0x40/0x88 > [ 5301.596179] trace_event_get_offsets_qdisc_reset+0x6c/0x2b0 > [ 5301.596182] perf_trace_qdisc_reset+0xb0/0x538 > [ 5301.596184] __traceiter_qdisc_reset+0x68/0xc0 > [ 5301.596188] qdisc_reset+0x43c/0x5e8 > [ 5301.596190] netif_set_real_num_tx_queues+0x288/0x770 > [ 5301.596194] veth_init_queues+0xfc/0x130 [veth] > [ 5301.596198] veth_newlink+0x45c/0x850 [veth] > [ 5301.596202] rtnl_newlink_create+0x2c8/0x798 > [ 5301.596205] __rtnl_newlink+0x92c/0xb60 > [ 5301.596208] rtnl_newlink+0xd8/0x130 > [ 5301.596211] rtnetlink_rcv_msg+0x2e0/0x890 > [ 5301.596214] netlink_rcv_skb+0x1c4/0x380 > [ 5301.596225] rtnetlink_rcv+0x20/0x38 > [ 5301.596227] netlink_unicast+0x3c8/0x640 > [ 5301.596231] netlink_sendmsg+0x658/0xa60 > [ 5301.596234] __sock_sendmsg+0xd0/0x180 > [ 5301.596243] __sys_sendto+0x1c0/0x280 > [ 5301.596246] __arm64_sys_sendto+0xc8/0x150 > [ 5301.596249] invoke_syscall+0xdc/0x268 > [ 5301.596256] el0_svc_common.constprop.0+0x16c/0x240 > [ 5301.596259] do_el0_svc+0x48/0x68 > [ 5301.596261] el0_svc+0x50/0x188 > [ 5301.596265] el0t_64_sync_handler+0x120/0x130 > [ 5301.596268] el0t_64_sync+0x194/0x198 > [ 5301.596272] Code: eb15001f 54000120 d343fc02 12000801 (38f46842) > [ 5301.596285] SMP: stopping secondary CPUs > [ 5301.597053] Starting crashdump kernel... > [ 5301.597057] Bye! > > Yeoreum and I use two fuzzing tool simultaneously. > > One process with syz-executor : https://github.com/google/syzkaller > > $ ./syz-execprog -executor=./syz-executor -repeat=1 -sandbox=setuid \ > -enable=none -collide=false log1 > > The other process with perf fuzzer: > https://github.com/deater/perf_event_tests/tree/master/fuzzer > > $ perf_event_tests/fuzzer/perf_fuzzer > > Yeoreum and I don't know if the patch we wrote will fix the underlying cause, > but we think that priority is to prevent kernel panic happening. > So, we're sending this patch. > > I can attach a sys-execprog's executing program, kernel dump and dmesg > if someone need it, but I'm not sure how to safely attach large vmcore with vmlinux. The syzkaller program + C reproducer is usually enough, please make it visible somewhere > > Signed-off-by: Yunseong Kim <yskelg@gmail.com>, Yeoreum Yun <yeoreum.yun@arm.com> Should be two SoB tags > --- > include/trace/events/qdisc.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/include/trace/events/qdisc.h b/include/trace/events/qdisc.h > index f1b5e816e7e5..170b51fbe47a 100644 > --- a/include/trace/events/qdisc.h > +++ b/include/trace/events/qdisc.h > @@ -81,7 +81,7 @@ TRACE_EVENT(qdisc_reset, > TP_ARGS(q), > > TP_STRUCT__entry( > - __string( dev, qdisc_dev(q)->name ) > + __string(dev, qdisc_dev(q) ? qdisc_dev(q)->name : "noop_queue") > __string( kind, q->ops->id ) > __field( u32, parent ) > __field( u32, handle )
Hi Pedro, On 6/21/24 11:24 오후, Pedro Tammela wrote: > On 21/06/2024 08:45, yskelg@gmail.com wrote: >> From: Yunseong Kim <yskelg@gmail.com> >> >> In the TRACE_EVENT(qdisc_reset) NULL dereference occurred from >> >> qdisc->dev_queue->dev <NULL> ->name >> >> This situation simulated from bunch of veths and Bluetooth >> dis/reconnection. >> >> During qdisc initialization, qdisc was being set to noop_queue. >> In veth_init_queue, the initial tx_num was reduced back to one, >> causing the qdisc reset to be called with noop, which led to the >> kernel panic. >> >> I think this will happen on the kernel version. >> Linux kernel version ≥ v6.7.10, ≥ v6.8 ≥ v6.9 and 6.10 > > You should tag your patch for the net tree Thank you for the code review, I will tag the next patch for the net tree. >> This occurred from 51270d573a8d. I think this patch is absolutely >> necessary. Previously, It was showing not intended string value of name. > Add a 'Fixes:' tag with this commit I will added 'Fixes: 51270d573a8d' Tag on patch v2 message. >> I can attach a sys-execprog's executing program, kernel dump and dmesg >> if someone need it, but I'm not sure how to safely attach large vmcore >> with vmlinux. > > The syzkaller program + C reproducer is usually enough, please make it > visible somewhere I got it, I have a converted C syz program. So, I've attached the GitHub gist link and C source code in this mail. https://gist.github.com/yskelg/cc64562873ce249cdd0d5a358b77d740 >> Signed-off-by: Yunseong Kim <yskelg@gmail.com>, Yeoreum Yun >> <yeoreum.yun@arm.com> > > Should be two SoB tags Oh, It's the first time we've sent together, I made a mistake.. Sorry. Thank you Pedro for the advice! >> --- >> include/trace/events/qdisc.h | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/include/trace/events/qdisc.h b/include/trace/events/qdisc.h >> index f1b5e816e7e5..170b51fbe47a 100644 >> --- a/include/trace/events/qdisc.h >> +++ b/include/trace/events/qdisc.h >> @@ -81,7 +81,7 @@ TRACE_EVENT(qdisc_reset, >> TP_ARGS(q), >> TP_STRUCT__entry( >> - __string( dev, qdisc_dev(q)->name ) >> + __string(dev, qdisc_dev(q) ? qdisc_dev(q)->name : "noop_queue") >> __string( kind, q->ops->id ) >> __field( u32, parent ) >> __field( u32, handle ) > Warm Regards, Yunseong Kim // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include <endian.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sys/syscall.h> #include <sys/types.h> #include <unistd.h> #ifndef __NR_add_key #define __NR_add_key 217 #endif #ifndef __NR_bpf #define __NR_bpf 280 #endif #ifndef __NR_io_uring_register #define __NR_io_uring_register 427 #endif #ifndef __NR_io_uring_setup #define __NR_io_uring_setup 425 #endif #ifndef __NR_keyctl #define __NR_keyctl 219 #endif #ifndef __NR_mlockall #define __NR_mlockall 230 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_mremap #define __NR_mremap 216 #endif #ifndef __NR_munmap #define __NR_munmap 215 #endif #ifndef __NR_openat #define __NR_openat 56 #endif #ifndef __NR_read #define __NR_read 63 #endif #ifndef __NR_shmctl #define __NR_shmctl 195 #endif #define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ *(type*)(addr) = \ htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) uint64_t r[7] = {0xffffffffffffffff, 0xffffffffffffffff, 0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0xffffffffffffffff, 0x0}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } *(uint32_t*)0x20000004 = 0; *(uint32_t*)0x20000008 = 0; *(uint32_t*)0x2000000c = 0; *(uint32_t*)0x20000010 = 0; *(uint32_t*)0x20000018 = -1; memset((void*)0x2000001c, 0, 12); res = syscall(__NR_io_uring_setup, /*entries=*/0xe68, /*params=*/0x20000000ul); if (res != -1) r[0] = res; memset((void*)0x20000080, 111, 1); syscall(__NR_io_uring_register, /*fd=*/r[0], /*opcode=*/0xaul, /*arg=*/0x20000080ul, /*size=*/1ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0xa000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0ul, /*size=*/0xfffffffffffffc91ul); if (res != -1) r[1] = res; *(uint32_t*)0x200000c0 = -1; *(uint32_t*)0x200000c4 = 0; res = syscall(__NR_bpf, /*cmd=*/0x21ul, /*arg=*/0x200000c0ul, /*size=*/8ul); if (res != -1) r[2] = res; *(uint32_t*)0x20000c80 = -1; *(uint32_t*)0x20000c84 = 0x20; *(uint64_t*)0x20000c88 = 0x20000280; *(uint64_t*)0x20000280 = 0x20000180; *(uint32_t*)0x20000288 = 0x95; *(uint64_t*)0x20000290 = 0x20000b80; res = syscall(__NR_bpf, /*cmd=*/0xful, /*arg=*/0x20000c80ul, /*size=*/0x10ul); if (res != -1) r[3] = *(uint32_t*)0x2000028c; memcpy((void*)0x20000040, "./file1\000", 8); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000040ul, /*flags=*/0ul, /*mode=*/0ul); if (res != -1) r[4] = res; syscall(__NR_read, /*fd=*/r[4], /*buf=*/0ul, /*count=*/0ul); *(uint32_t*)0x20000cc0 = 0x1b; *(uint32_t*)0x20000cc4 = 0; *(uint32_t*)0x20000cc8 = 0; *(uint32_t*)0x20000ccc = 0x9ff; *(uint32_t*)0x20000cd0 = 0; *(uint32_t*)0x20000cd4 = r[1]; *(uint32_t*)0x20000cd8 = 0; memset((void*)0x20000cdc, 0, 16); *(uint32_t*)0x20000cec = 0; *(uint32_t*)0x20000cf0 = -1; *(uint32_t*)0x20000cf4 = 4; *(uint32_t*)0x20000cf8 = 4; *(uint32_t*)0x20000cfc = 4; *(uint64_t*)0x20000d00 = 0; res = syscall(__NR_bpf, /*cmd=*/0ul, /*arg=*/0x20000cc0ul, /*size=*/0x48ul); if (res != -1) r[5] = res; *(uint32_t*)0x20000e00 = 0; *(uint32_t*)0x20000e04 = 6; *(uint64_t*)0x20000e08 = 0x20000040; *(uint8_t*)0x20000040 = 0x18; STORE_BY_BITMASK(uint8_t, , 0x20000041, 7, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x20000041, 4, 4, 4); *(uint16_t*)0x20000042 = 0; *(uint32_t*)0x20000044 = 4; *(uint8_t*)0x20000048 = 0; *(uint8_t*)0x20000049 = 0; *(uint16_t*)0x2000004a = 0; *(uint32_t*)0x2000004c = 0; STORE_BY_BITMASK(uint8_t, , 0x20000050, 4, 0, 3); STORE_BY_BITMASK(uint8_t, , 0x20000050, 1, 3, 1); STORE_BY_BITMASK(uint8_t, , 0x20000050, 0, 4, 4); STORE_BY_BITMASK(uint8_t, , 0x20000051, 0xa, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x20000051, 0, 4, 4); *(uint16_t*)0x20000052 = 0xc; *(uint32_t*)0x20000054 = 0; *(uint8_t*)0x20000058 = 0x18; STORE_BY_BITMASK(uint8_t, , 0x20000059, 0, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x20000059, 4, 4, 4); *(uint16_t*)0x2000005a = 0; *(uint32_t*)0x2000005c = 5; *(uint8_t*)0x20000060 = 0; *(uint8_t*)0x20000061 = 0; *(uint16_t*)0x20000062 = 0; *(uint32_t*)0x20000064 = 0; *(uint8_t*)0x20000068 = 0x85; STORE_BY_BITMASK(uint8_t, , 0x20000069, 0, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x20000069, 1, 4, 4); *(uint16_t*)0x2000006a = 0; *(uint32_t*)0x2000006c = 0xfffffff9; *(uint64_t*)0x20000e10 = 0x20000080; memcpy((void*)0x20000080, "GPL\000", 4); *(uint32_t*)0x20000e18 = 3; *(uint32_t*)0x20000e1c = 0; *(uint64_t*)0x20000e20 = 0; *(uint32_t*)0x20000e28 = 0x41100; *(uint32_t*)0x20000e2c = 0x50; memset((void*)0x20000e30, 0, 16); *(uint32_t*)0x20000e40 = 0; *(uint32_t*)0x20000e44 = 0x21; *(uint32_t*)0x20000e48 = r[2]; *(uint32_t*)0x20000e4c = 8; *(uint64_t*)0x20000e50 = 0x20000100; *(uint32_t*)0x20000100 = 3; *(uint32_t*)0x20000104 = 5; *(uint32_t*)0x20000e58 = 8; *(uint32_t*)0x20000e5c = 0x10; *(uint64_t*)0x20000e60 = 0x20000140; *(uint32_t*)0x20000140 = 3; *(uint32_t*)0x20000144 = 9; *(uint32_t*)0x20000148 = 0x62; *(uint32_t*)0x2000014c = 0x5038; *(uint32_t*)0x20000e68 = 0x10; *(uint32_t*)0x20000e6c = r[3]; *(uint32_t*)0x20000e70 = r[4]; *(uint32_t*)0x20000e74 = 5; *(uint64_t*)0x20000e78 = 0x20000d40; *(uint32_t*)0x20000d40 = r[1]; *(uint32_t*)0x20000d44 = r[1]; *(uint32_t*)0x20000d48 = r[5]; *(uint64_t*)0x20000e80 = 0x20000d80; *(uint32_t*)0x20000d80 = 2; *(uint32_t*)0x20000d84 = 3; *(uint32_t*)0x20000d88 = 2; *(uint32_t*)0x20000d8c = 7; *(uint32_t*)0x20000d90 = 0; *(uint32_t*)0x20000d94 = 5; *(uint32_t*)0x20000d98 = 7; *(uint32_t*)0x20000d9c = 7; *(uint32_t*)0x20000da0 = 4; *(uint32_t*)0x20000da4 = 4; *(uint32_t*)0x20000da8 = 6; *(uint32_t*)0x20000dac = 0xa; *(uint32_t*)0x20000db0 = 2; *(uint32_t*)0x20000db4 = 5; *(uint32_t*)0x20000db8 = 7; *(uint32_t*)0x20000dbc = 7; *(uint32_t*)0x20000dc0 = 4; *(uint32_t*)0x20000dc4 = 1; *(uint32_t*)0x20000dc8 = 0xf; *(uint32_t*)0x20000dcc = 8; *(uint32_t*)0x20000e88 = 0x10; *(uint32_t*)0x20000e8c = 0x46f; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000e00ul, /*size=*/0x90ul); memcpy((void*)0x20000000, "asymmetric\000", 11); memcpy((void*)0x20000240, "syz", 3); *(uint8_t*)0x20000243 = 0x21; *(uint8_t*)0x20000244 = 0; res = syscall(__NR_add_key, /*type=*/0x20000000ul, /*desc=*/0x20000240ul, /*payload=*/0ul, /*paylen=*/0ul, /*keyring=*/0xfffffff9); if (res != -1) r[6] = res; syscall(__NR_keyctl, /*code=*/0xbul, /*key=*/r[6], /*payload=*/0x20000300ul, /*len=*/0x44ul, 0); *(uint32_t*)0x200000c0 = 5; *(uint32_t*)0x200000c4 = 0xb; *(uint64_t*)0x200000c8 = 0x20000180; *(uint8_t*)0x20000180 = r[2]; *(uint64_t*)0x200000d0 = 0x20000200; memcpy((void*)0x20000200, "GPL\000", 4); *(uint32_t*)0x200000d8 = 0x4000004; *(uint32_t*)0x200000dc = 0; *(uint64_t*)0x200000e0 = 0; *(uint32_t*)0x200000e8 = 0x40f00; *(uint32_t*)0x200000ec = 0; memset((void*)0x200000f0, 0, 16); *(uint32_t*)0x20000100 = 0; *(uint32_t*)0x20000104 = 0x17; *(uint32_t*)0x20000108 = 0; *(uint32_t*)0x2000010c = 0; *(uint64_t*)0x20000110 = 0; *(uint32_t*)0x20000118 = 0; *(uint32_t*)0x2000011c = 0; *(uint64_t*)0x20000120 = 0; *(uint32_t*)0x20000128 = 0; *(uint32_t*)0x2000012c = r[3]; *(uint32_t*)0x20000130 = 0; *(uint32_t*)0x20000134 = 0; *(uint64_t*)0x20000138 = 0; *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint32_t*)0x2000014c = 0; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000c0ul, /*size=*/0x90ul); syscall(__NR_mlockall, /*flags=MCL_FUTURE|MCL_CURRENT*/ 3ul); *(uint32_t*)0x20000280 = 0x798e2636; *(uint32_t*)0x20000284 = 0; *(uint32_t*)0x20000288 = 0; *(uint32_t*)0x2000028c = 0; *(uint32_t*)0x20000290 = 0xee00; *(uint32_t*)0x20000294 = 0; *(uint16_t*)0x20000298 = 0; *(uint32_t*)0x2000029c = 0x80; *(uint64_t*)0x200002a0 = 0; *(uint64_t*)0x200002a8 = 0; *(uint64_t*)0x200002b0 = 0; *(uint32_t*)0x200002b8 = 0; *(uint32_t*)0x200002bc = 0; *(uint16_t*)0x200002c0 = 0; *(uint16_t*)0x200002c2 = 0; *(uint64_t*)0x200002c8 = 0; *(uint64_t*)0x200002d0 = 0; syscall(__NR_shmctl, /*shmid=*/0, /*cmd=*/1ul, /*buf=*/0x20000280ul); syscall(__NR_munmap, /*addr=*/0x20000000ul, /*len=*/0x400000ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0xa000ul, /*prot=PROT_GROWSDOWN|PROT_SEM|PROT_READ|PROT_EXEC*/ 0x100000dul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mremap, /*addr=*/0x20000000ul, /*len=*/0xc00000ul, /*newlen=*/0x3000ul, /*flags=MREMAP_FIXED|MREMAP_MAYMOVE*/ 3ul, /*newaddr=*/0x20ffa000ul); return 0; }
On Fri, 21 Jun 2024 20:45:49 +0900 yskelg@gmail.com wrote: > diff --git a/include/trace/events/qdisc.h b/include/trace/events/qdisc.h > index f1b5e816e7e5..170b51fbe47a 100644 > --- a/include/trace/events/qdisc.h > +++ b/include/trace/events/qdisc.h > @@ -81,7 +81,7 @@ TRACE_EVENT(qdisc_reset, > TP_ARGS(q), > > TP_STRUCT__entry( > - __string( dev, qdisc_dev(q)->name ) > + __string(dev, qdisc_dev(q) ? qdisc_dev(q)->name : "noop_queue") From a tracing point of view: Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org> -- Steve > __string( kind, q->ops->id ) > __field( u32, parent ) > __field( u32, handle )
diff --git a/include/trace/events/qdisc.h b/include/trace/events/qdisc.h index f1b5e816e7e5..170b51fbe47a 100644 --- a/include/trace/events/qdisc.h +++ b/include/trace/events/qdisc.h @@ -81,7 +81,7 @@ TRACE_EVENT(qdisc_reset, TP_ARGS(q), TP_STRUCT__entry( - __string( dev, qdisc_dev(q)->name ) + __string(dev, qdisc_dev(q) ? qdisc_dev(q)->name : "noop_queue") __string( kind, q->ops->id ) __field( u32, parent ) __field( u32, handle )