syzkaller login: [ 501.856333][ T1858] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 501.891791][ T1858] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 501.920140][ T1858] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. [ 521.016666][ T1858] netlink: 4 bytes leftover after parsing attributes in process `dhcpcd'. Warning: Permanently added '[localhost]:63124' (ECDSA) to the list of known hosts. 1970/01/01 00:09:18 fuzzer started 1970/01/01 00:09:33 dialing manager at localhost:42693 [ 579.065133][ T2032] cgroup: Unknown subsys name 'net' [ 580.302071][ T2032] cgroup: Unknown subsys name 'rlimit' 1970/01/01 00:09:40 syscalls: 2827 1970/01/01 00:09:40 code coverage: enabled 1970/01/01 00:09:40 comparison tracing: enabled 1970/01/01 00:09:40 extra coverage: enabled 1970/01/01 00:09:40 delay kcov mmap: mmap returned an invalid pointer 1970/01/01 00:09:40 setuid sandbox: enabled 1970/01/01 00:09:40 namespace sandbox: enabled 1970/01/01 00:09:40 Android sandbox: /sys/fs/selinux/policy does not exist 1970/01/01 00:09:40 fault injection: enabled 1970/01/01 00:09:40 leak checking: CONFIG_DEBUG_KMEMLEAK is not enabled 1970/01/01 00:09:40 net packet injection: enabled 1970/01/01 00:09:40 net device setup: enabled 1970/01/01 00:09:40 concurrency sanitizer: /sys/kernel/debug/kcsan does not exist 1970/01/01 00:09:40 devlink PCI setup: PCI device 0000:00:10.0 is not available 1970/01/01 00:09:40 USB emulation: enabled 1970/01/01 00:09:40 hci packet injection: /dev/vhci does not exist 1970/01/01 00:09:40 wifi device emulation: /sys/class/mac80211_hwsim/ does not exist 1970/01/01 00:09:40 802.15.4 emulation: /sys/bus/platform/devices/mac802154_hwsim does not exist 1970/01/01 00:09:40 fetching corpus: 0, signal 0/2000 (executing program) 1970/01/01 00:09:45 fetching corpus: 50, signal 31870/35415 (executing program) 1970/01/01 00:09:50 fetching corpus: 100, signal 53493/58267 (executing program) 1970/01/01 00:09:54 fetching corpus: 150, signal 61257/67413 (executing program) 1970/01/01 00:09:58 fetching corpus: 200, signal 73592/80861 (executing program) 1970/01/01 00:10:02 fetching corpus: 250, signal 80101/88523 (executing program) 1970/01/01 00:10:05 fetching corpus: 300, signal 87878/97271 (executing program) 1970/01/01 00:10:09 fetching corpus: 350, signal 91351/101880 (executing 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(executing program) 1970/01/01 00:11:24 fetching corpus: 1597, signal 163516/189443 (executing program) 1970/01/01 00:11:27 fetching corpus: 1647, signal 165110/191458 (executing program) 1970/01/01 00:11:29 fetching corpus: 1697, signal 167057/193717 (executing program) 1970/01/01 00:11:32 fetching corpus: 1747, signal 168801/195801 (executing program) 1970/01/01 00:11:34 fetching corpus: 1797, signal 170291/197650 (executing program) 1970/01/01 00:11:36 fetching corpus: 1847, signal 172753/200168 (executing program) 1970/01/01 00:11:39 fetching corpus: 1897, signal 174745/202256 (executing program) 1970/01/01 00:11:42 fetching corpus: 1947, signal 176073/203913 (executing program) 1970/01/01 00:11:45 fetching corpus: 1996, signal 178615/206380 (executing program) 1970/01/01 00:11:47 fetching corpus: 2046, signal 179680/207844 (executing program) 1970/01/01 00:11:50 fetching corpus: 2096, signal 180813/209220 (executing program) 1970/01/01 00:11:52 fetching corpus: 2146, signal 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program) 1970/01/01 00:15:34 fetching corpus: 5737, signal 259902/269202 (executing program) 1970/01/01 00:15:37 fetching corpus: 5787, signal 260619/269364 (executing program) 1970/01/01 00:15:41 fetching corpus: 5837, signal 261485/269528 (executing program) 1970/01/01 00:15:44 fetching corpus: 5885, signal 262224/269704 (executing program) 1970/01/01 00:15:47 fetching corpus: 5935, signal 263351/269893 (executing program) 1970/01/01 00:15:50 fetching corpus: 5985, signal 263801/270020 (executing program) 1970/01/01 00:15:53 fetching corpus: 6035, signal 264265/270129 (executing program) 1970/01/01 00:15:58 fetching corpus: 6085, signal 264939/270230 (executing program) 1970/01/01 00:16:01 fetching corpus: 6135, signal 265286/270345 (executing program) 1970/01/01 00:16:04 fetching corpus: 6184, signal 265885/270436 (executing program) 1970/01/01 00:16:06 fetching corpus: 6234, signal 266214/270499 (executing program) 1970/01/01 00:16:09 fetching corpus: 6284, signal 266820/270578 (executing program) 1970/01/01 00:16:11 fetching corpus: 6334, signal 267360/270655 (executing program) 1970/01/01 00:16:12 fetching corpus: 6336, signal 267373/270690 (executing program) 1970/01/01 00:16:12 fetching corpus: 6336, signal 267373/270713 (executing program) 1970/01/01 00:16:12 fetching corpus: 6336, signal 267373/270744 (executing program) 1970/01/01 00:16:12 fetching corpus: 6336, signal 267373/270773 (executing program) 1970/01/01 00:16:13 fetching corpus: 6336, signal 267373/270803 (executing program) 1970/01/01 00:16:13 fetching corpus: 6336, signal 267373/270835 (executing program) 1970/01/01 00:16:13 fetching corpus: 6336, signal 267373/270854 (executing program) 1970/01/01 00:16:13 fetching corpus: 6336, signal 267373/270872 (executing program) 1970/01/01 00:16:13 fetching corpus: 6336, signal 267373/270872 (executing program) 1970/01/01 00:18:29 starting 2 fuzzer processes 00:18:29 executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) r1 = dup(r0) sendmsg$nl_route(r1, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000040)=@bridge_getlink={0x2c, 0x12, 0x1, 0x0, 0x0, {}, [@IFLA_ADDRESS={0xa, 0x1d}]}, 0x2c}}, 0x0) 00:18:30 executing program 1: syz_mount_image$tmpfs(0x0, &(0x7f0000000080)='./file0\x00', 0x0, 0x0, 0x0, 0x0, 0x0) mount(0x0, &(0x7f0000000100)='./file0\x00', &(0x7f0000000180)='binder\x00', 0x0, 0x0) umount2(&(0x7f0000000000)='./file0\x00', 0x0) [ 1138.334184][ C0] ================================================================== [ 1138.340049][ C0] BUG: KASAN: slab-out-of-bounds in walk_stackframe+0x11c/0x260 [ 1138.341462][ C0] Read of size 8 at addr ffffaf802138bff0 by task syz-executor.0/2051 [ 1138.342684][ C0] [ 1138.345497][ C0] CPU: 0 PID: 2051 Comm: syz-executor.0 Not tainted 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 [ 1138.346892][ C0] Hardware name: riscv-virtio,qemu (DT) [ 1138.348258][ C0] Call Trace: [ 1138.349414][ C0] [] dump_backtrace+0x2e/0x3c [ 1138.350459][ C0] [] show_stack+0x34/0x40 [ 1138.351436][ C0] [] dump_stack_lvl+0xe4/0x150 [ 1138.352538][ C0] [] print_address_description.constprop.0+0x2a/0x330 [ 1138.353682][ C0] [] kasan_report+0x184/0x1e0 [ 1138.354623][ C0] [] __asan_load8+0x6e/0x96 [ 1138.355664][ C0] [] walk_stackframe+0x11c/0x260 [ 1138.356628][ C0] [] arch_stack_walk+0x2c/0x3c [ 1138.358153][ C0] [ 1138.359050][ C0] Allocated by task 0: [ 1138.359862][ C0] (stack is not available) [ 1138.360490][ C0] [ 1138.361058][ C0] The buggy address belongs to the object at ffffaf802138be00 [ 1138.361058][ C0] which belongs to the cache mnt_cache of size 320 [ 1138.362459][ C0] The buggy address is located 176 bytes to the right of [ 1138.362459][ C0] 320-byte region [ffffaf802138be00, ffffaf802138bf40) [ 1138.364106][ C0] The buggy address belongs to the page: [ 1138.365545][ C0] page:ffffaf807afa0ed0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa158a [ 1138.366987][ C0] head:ffffaf807afa0ed0 order:1 compound_mapcount:0 [ 1138.368797][ C0] flags: 0xa000010200(slab|head|section=20|node=0|zone=0) [ 1138.371385][ C0] raw: 000000a000010200 0000000000000000 0000000000000122 ffffaf80072ed140 [ 1138.372606][ C0] raw: 0000000000000000 0000000080150015 00000001ffffffff 0000000000000000 [ 1138.373655][ C0] raw: 00000000000007ff [ 1138.374455][ C0] page dumped because: kasan: bad access detected [ 1138.375549][ C0] page_owner tracks the page as allocated [ 1138.376426][ C0] page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 2051, ts 1116480958600, free_ts 0 [ 1138.378419][ C0] __set_page_owner+0x48/0x136 [ 1138.380094][ C0] post_alloc_hook+0xd0/0x10a [ 1138.381021][ C0] get_page_from_freelist+0x8da/0x12d8 [ 1138.381993][ C0] __alloc_pages+0x150/0x3b6 [ 1138.382932][ C0] alloc_pages+0x132/0x2a6 [ 1138.383886][ C0] alloc_slab_page.constprop.0+0xc2/0xfa [ 1138.385176][ C0] new_slab+0x25a/0x2cc [ 1138.386123][ C0] ___slab_alloc+0x56e/0x918 [ 1138.387076][ C0] __slab_alloc.constprop.0+0x50/0x8c [ 1138.388787][ C0] kmem_cache_alloc+0x39c/0x3de [ 1138.390292][ C0] alloc_vfsmnt+0x32/0x2ea [ 1138.391330][ C0] clone_mnt+0x4a/0x75a [ 1138.392261][ C0] copy_tree+0x2bc/0x6c8 [ 1138.393473][ C0] copy_mnt_ns+0x174/0x71c [ 1138.394647][ C0] create_new_namespaces+0xac/0x6f8 [ 1138.395895][ C0] unshare_nsproxy_namespaces+0xa2/0x144 [ 1138.397057][ C0] page_owner free stack trace missing [ 1138.398535][ C0] [ 1138.399394][ C0] Memory state around the buggy address: [ 1138.400726][ C0] ffffaf802138be80: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 1138.401797][ C0] ffffaf802138bf00: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 1138.402892][ C0] >ffffaf802138bf80: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 1138.403888][ C0] ^ [ 1138.405035][ C0] ffffaf802138c000: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 f3 [ 1138.406093][ C0] ffffaf802138c080: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 [ 1138.407232][ C0] ================================================================== [ 1138.409142][ C0] Disabling lock debugging due to kernel taint [ 1138.426014][ T2051] Kernel panic - not syncing: corrupted stack end detected inside scheduler [ 1138.427779][ T2051] CPU: 0 PID: 2051 Comm: syz-executor.0 Tainted: G B 5.17.0-rc1-syzkaller-00002-g0966d385830d #0 [ 1138.429366][ T2051] Hardware name: riscv-virtio,qemu (DT) [ 1138.430178][ T2051] Call Trace: [ 1138.430853][ T2051] [] dump_backtrace+0x2e/0x3c [ 1138.432133][ T2051] [] show_stack+0x34/0x40 [ 1138.433235][ T2051] [] dump_stack_lvl+0xe4/0x150 [ 1138.434399][ T2051] [] dump_stack+0x1c/0x24 [ 1138.435534][ T2051] [] panic+0x24a/0x634 [ 1138.436548][ T2051] [] schedule+0x0/0x14c [ 1138.438168][ T2051] [] preempt_schedule_irq+0x4a/0x13e [ 1138.439448][ T2051] [] resume_kernel+0x16/0x18 [ 1138.440869][ T2051] SMP: stopping secondary CPUs [ 1138.443350][ T2051] Rebooting in 86400 seconds.. VM DIAGNOSIS: 09:39:03 Registers: info registers vcpu 0 pc ffffffff80dc337e mhartid 0000000000000000 mstatus 00000000000000a0 mip 00000000000000a0 mie 000000000000022a mideleg 0000000000000222 medeleg 000000000000b109 mtvec 0000000080000540 stvec ffffffff800055d4 mepc ffffffff8011314c sepc ffffffff82b2f6be mcause 8000000000000007 scause 8000000000000005 mtval 0000000000000000 stval 0000000000000000 x0/zero 0000000000000000 x1/ra ffffffff80dc337e x2/sp ffffaf802138b9c0 x3/gp ffffffff85863ac0 x4/tp ffffaf800d41e100 x5/t0 ffffffff86bcb657 x6/t1 7956ce9db50e0100 x7/t2 0000000000000000 x8/s0 ffffaf802138b9f0 x9/s1 ffffffff86e58900 x10/a0 ffffffff86e58948 x11/a1 ffff8f800066c000 x12/a2 1ffffffff0dcb129 x13/a3 ffffffff80dc337e x14/a4 0000000000000000 x15/a5 ffffffff86e58948 x16/a6 ffffffff86e589f1 x17/a7 ffffffff80dcc9fe x18/s2 ffff8f800066c000 x19/s3 0000000000000031 x20/s4 ffffffff86e58900 x21/s5 ffffffff80dc333e x22/s6 0000000000000000 x23/s7 ffffffff86bcb658 x24/s8 0000000000000010 x25/s9 ffffffff86e58958 x26/s10 0000000000000010 x27/s11 0000000000000000 x28/t3 fffffffff3f3f300 x29/t4 ffffffff80112282 x30/t5 1ffff5f0042716e8 x31/t6 ffffffff86bcb657 f0/ft0 0000000000000000 f1/ft1 0000000000000000 f2/ft2 0000000000000000 f3/ft3 0000000000000000 f4/ft4 0000000000000000 f5/ft5 0000000000000000 f6/ft6 0000000000000000 f7/ft7 0000000000000000 f8/fs0 0000000000000000 f9/fs1 0000000000000000 f10/fa0 0000000000000000 f11/fa1 0000000000000000 f12/fa2 0000000000000000 f13/fa3 0000000000000000 f14/fa4 0000000000000000 f15/fa5 0000000000000000 f16/fa6 0000000000000000 f17/fa7 0000000000000000 f18/fs2 0000000000000000 f19/fs3 0000000000000000 f20/fs4 0000000000000000 f21/fs5 0000000000000000 f22/fs6 0000000000000000 f23/fs7 0000000000000000 f24/fs8 0000000000000000 f25/fs9 0000000000000000 f26/fs10 0000000000000000 f27/fs11 0000000000000000 f28/ft8 0000000000000000 f29/ft9 0000000000000000 f30/ft10 0000000000000000 f31/ft11 0000000000000000 info registers vcpu 1 pc ffffffff80475b48 mhartid 0000000000000001 mstatus 00000000000000a2 mip 0000000000000000 mie 00000000000002aa mideleg 0000000000000222 medeleg 000000000000b109 mtvec 0000000080000540 stvec ffffffff800055d4 mepc ffffffff8000f97e sepc 00007fff9a6fc29c mcause 0000000000000009 scause 0000000000000008 mtval 0000000000000000 stval 0000000000000000 x0/zero 0000000000000000 x1/ra ffffffff80be1fc8 x2/sp ffffaf800cf0bd30 x3/gp ffffffff85863ac0 x4/tp ffffaf800ced3080 x5/t0 0000000000000388 x6/t1 fffff5ef019e17b5 x7/t2 ffffffffffffffff x8/s0 ffffaf800cf0bd60 x9/s1 0000000000000010 x10/a0 00007fffc5a443c0 x11/a1 ffffaf800cf0bda0 x12/a2 0000000000000010 x13/a3 ffffffff80ae14c4 x14/a4 0000000000000000 x15/a5 fffff5ef019e17b6 x16/a6 ffffaf800cf0bda0 x17/a7 ffffaf800cf0bdaf x18/s2 00007ffffffffff0 x19/s3 00007fffc5a443c0 x20/s4 ffffaf800cf0bda0 x21/s5 00007fffc5a443c0 x22/s6 1ffff5f0019e17c8 x23/s7 00007fff9aa96c48 x24/s8 ffffffffffffffff x25/s9 0000000000000471 x26/s10 0000000000000001 x27/s11 0000000000000001 x28/t3 fffffffff3f3f300 x29/t4 fffff5ef019e17b4 x30/t5 0000000000000010 x31/t6 0000000000040000 f0/ft0 0000000000000000 f1/ft1 0000000000000000 f2/ft2 0000000000000000 f3/ft3 0000000000000000 f4/ft4 0000000000000000 f5/ft5 0000000000000000 f6/ft6 0000000000000000 f7/ft7 0000000000000000 f8/fs0 0000000000000000 f9/fs1 0000000000000000 f10/fa0 0000000000000000 f11/fa1 0000000000000000 f12/fa2 0000000000000000 f13/fa3 0000000000000000 f14/fa4 0000000000000000 f15/fa5 0000000000000000 f16/fa6 0000000000000000 f17/fa7 0000000000000000 f18/fs2 0000000000000000 f19/fs3 0000000000000000 f20/fs4 0000000000000000 f21/fs5 0000000000000000 f22/fs6 0000000000000000 f23/fs7 0000000000000000 f24/fs8 0000000000000000 f25/fs9 0000000000000000 f26/fs10 0000000000000000 f27/fs11 0000000000000000 f28/ft8 0000000000000000 f29/ft9 0000000000000000 f30/ft10 0000000000000000 f31/ft11 0000000000000000