[ 34.962216] BUG: Bad rss-counter state mm:00000000ca8f77d2 type:MM_FILEPAGES val:33 [ 34.963323] BUG: Bad rss-counter state mm:00000000ca8f77d2 type:MM_ANONPAGES val:22 [ 35.114089] ================================================================== [ 35.115011] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.115958] Read of size 8 at addr ffff88800ebc1058 by task sshd/225 [ 35.116703] [ 35.116987] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.117972] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.118986] Call Trace: [ 35.119308] [ 35.119595] dump_stack_lvl+0x91/0xf0 [ 35.120126] print_report+0xcc/0x620 [ 35.120614] ? __virt_addr_valid+0x102/0x340 [ 35.121179] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.121795] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.122418] kasan_report+0xbe/0xf0 [ 35.122893] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.123534] vma_interval_tree_remove+0xc75/0xec0 [ 35.124174] vma_prepare+0xc54/0x11a0 [ 35.124659] __split_vma+0x5af/0x950 [ 35.125153] ? __pfx___split_vma+0x10/0x10 [ 35.125682] ? find_held_lock+0x2c/0x110 [ 35.126249] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.126829] ? lock_is_held_type+0x9f/0x120 [ 35.127403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.128042] ? mtree_range_walk+0x632/0x900 [ 35.128616] ? mas_walk+0x5c7/0x7c0 [ 35.129099] do_vmi_munmap+0x1f1/0x2b0 [ 35.129596] mmap_region+0x1f9/0x2660 [ 35.130095] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.130613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.131341] ? __pfx_lock_acquire+0x10/0x10 [ 35.131899] ? __pfx_mmap_region+0x10/0x10 [ 35.132444] ? security_mmap_addr+0x7d/0xa0 [ 35.132984] ? get_unmapped_area+0x1f5/0x3f0 [ 35.133531] do_mmap+0x854/0xf00 [ 35.133983] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.134478] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.135062] ksys_mmap_pgoff+0x3af/0x500 [ 35.135570] do_syscall_64+0x3f/0x90 [ 35.136072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.136714] RIP: 0033:0x7f5f7161fd82 [ 35.137181] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 35.139339] RSP: 002b:00007ffd659cb258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.140263] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f7161fd82 [ 35.141124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f70a59000 [ 35.141993] RBP: 00007f5f70a59000 R08: 0000000000000009 R09: 0000000000001000 [ 35.142838] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce8acf1ec0 [ 35.143725] R13: 00007ffd659cb270 R14: 00007ffd659cb2a0 R15: 00007ffd659cb600 [ 35.144598] [ 35.144889] [ 35.145118] Allocated by task 216: [ 35.145545] kasan_save_stack+0x22/0x50 [ 35.146069] kasan_set_track+0x25/0x30 [ 35.146560] __kasan_slab_alloc+0x59/0x70 [ 35.147114] kmem_cache_alloc+0x16b/0x370 [ 35.147629] vm_area_dup+0x20/0x160 [ 35.148110] __split_vma+0x170/0x950 [ 35.148574] split_vma+0xc6/0x110 [ 35.149023] mprotect_fixup+0x8d2/0xb30 [ 35.149522] do_mprotect_pkey+0x87e/0xd40 [ 35.150060] __x64_sys_mprotect+0x78/0xc0 [ 35.150582] do_syscall_64+0x3f/0x90 [ 35.151075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.151738] [ 35.151964] Freed by task 216: [ 35.152352] kasan_save_stack+0x22/0x50 [ 35.152851] kasan_set_track+0x25/0x30 [ 35.153350] kasan_save_free_info+0x2b/0x50 [ 35.153884] __kasan_slab_free+0x10a/0x190 [ 35.154435] kmem_cache_free+0x10d/0x4d0 [ 35.154965] rcu_core+0x8c8/0x2860 [ 35.155408] __do_softirq+0x1b7/0x7d4 [ 35.155921] [ 35.156142] Last potentially related work creation: [ 35.156724] kasan_save_stack+0x22/0x50 [ 35.157241] __kasan_record_aux_stack+0x8e/0xa0 [ 35.157813] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.158458] remove_vma+0x139/0x170 [ 35.158920] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.159495] do_vmi_munmap+0x1f1/0x2b0 [ 35.159996] __vm_munmap+0x138/0x3a0 [ 35.160462] __x64_sys_munmap+0x59/0x80 [ 35.160971] do_syscall_64+0x3f/0x90 [ 35.161438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.162088] [ 35.162298] Second to last potentially related work creation: [ 35.162988] kasan_save_stack+0x22/0x50 [ 35.163491] __kasan_record_aux_stack+0x8e/0xa0 [ 35.164096] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.164736] remove_vma+0x139/0x170 [ 35.165204] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.165763] do_vmi_munmap+0x1f1/0x2b0 [ 35.166267] __vm_munmap+0x138/0x3a0 [ 35.166731] elf_map+0x26f/0x310 [ 35.167196] load_elf_binary+0x3417/0x5030 [ 35.167737] bprm_execve+0x803/0x1940 [ 35.168221] do_execveat_common+0x734/0x8e0 [ 35.168743] __x64_sys_execve+0x93/0xc0 [ 35.169239] do_syscall_64+0x3f/0x90 [ 35.169712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.170363] [ 35.170579] The buggy address belongs to the object at ffff88800ebc1000 [ 35.170579] which belongs to the cache vm_area_struct of size 168 [ 35.172075] The buggy address is located 88 bytes inside of [ 35.172075] freed 168-byte region [ffff88800ebc1000, ffff88800ebc10a8) [ 35.173485] [ 35.173705] The buggy address belongs to the physical page: [ 35.174377] page:000000005e7c7664 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebc1 [ 35.175478] memcg:ffff88800e244001 [ 35.175932] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.176567] page_type: 0xffffffff() [ 35.177022] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 35.177949] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e244001 [ 35.178862] page dumped because: kasan: bad access detected [ 35.179557] [ 35.179784] Memory state around the buggy address: [ 35.180380] ffff88800ebc0f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.181253] ffff88800ebc0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.182119] >ffff88800ebc1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.182987] ^ [ 35.183738] ffff88800ebc1080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 35.184603] ffff88800ebc1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.185458] ================================================================== [ 35.186653] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.197975] BUG: Bad rss-counter state mm:00000000414978d0 type:MM_FILEPAGES val:33 [ 37.199134] BUG: Bad rss-counter state mm:00000000414978d0 type:MM_ANONPAGES val:22 [ 37.605940] BUG: Bad rss-counter state mm:000000006579ce80 type:MM_FILEPAGES val:33 [ 37.607012] BUG: Bad rss-counter state mm:000000006579ce80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24212' (ECDSA) to the list of known hosts. 2023/06/20 04:29:19 fuzzer started 2023/06/20 04:29:19 dialing manager at localhost:44161 2023/06/20 04:29:19 checking machine... 2023/06/20 04:29:19 checking revisions... [ 38.326720] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:29:20 testing simple program... [ 38.374311] cgroup: Unknown subsys name 'net' [ 38.413839] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:29:15 Registers: info registers vcpu 0 RAX=1ffffffff09388d1 RBX=0000000000000016 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81f2cc16 RDI=ffffffff849c4688 RBP=0000000000000001 RSP=ffff88800edd7aa8 R8 =0000000000000005 R9 =0000000000000044 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800edd7b40 R13=dffffc0000000000 R14=0000000000000010 R15=ffff888018d17140 RIP=ffffffff81f2cc2a RFL=00000216 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcc68523900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fcc68ada618 CR3=0000000019786000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f976f4a81f0 CR3=000000000f064000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=33cdb6fd11714eae764bd8cea69d21a5 XMM02=ec2efd57dc4c00df000000000011d848 XMM03=bdbafb4faf1be226000000000011d918 XMM04=921e1055492274da00000000000ae988 XMM05=e7a3b7508224713400000000001352b0 XMM06=ae9b264101391a5b0000000000135138 XMM07=e042d86d42eb936e0000000000124530 XMM08=bdbafb4faf1be226000000000011d918 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000