syzkaller login: [ 30.663808] BUG: Bad rss-counter state mm:0000000078c06fb3 type:MM_FILEPAGES val:33 [ 30.665020] BUG: Bad rss-counter state mm:0000000078c06fb3 type:MM_ANONPAGES val:22 [ 30.819517] ================================================================== [ 30.820415] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.821333] Read of size 8 at addr ffff88800ee61ed8 by task sshd/219 [ 30.822091] [ 30.822309] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.823270] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.824230] Call Trace: [ 30.824546] [ 30.824862] dump_stack_lvl+0x91/0xf0 [ 30.825350] print_report+0xcc/0x620 [ 30.825830] ? __virt_addr_valid+0x102/0x340 [ 30.826386] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827009] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.827617] kasan_report+0xbe/0xf0 [ 30.828085] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.828693] vma_interval_tree_remove+0xc75/0xec0 [ 30.829287] vma_prepare+0xc54/0x11a0 [ 30.829766] __split_vma+0x5af/0x950 [ 30.830234] ? __pfx___split_vma+0x10/0x10 [ 30.830767] ? find_held_lock+0x2c/0x110 [ 30.831283] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.831839] ? lock_is_held_type+0x9f/0x120 [ 30.832374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.832969] ? mtree_range_walk+0x632/0x900 [ 30.833524] ? mas_walk+0x5c7/0x7c0 [ 30.833997] do_vmi_munmap+0x1f1/0x2b0 [ 30.834498] mmap_region+0x1f9/0x2660 [ 30.834974] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.835484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.836188] ? __pfx_lock_acquire+0x10/0x10 [ 30.836728] ? __pfx_mmap_region+0x10/0x10 [ 30.837251] ? security_mmap_addr+0x7d/0xa0 [ 30.837783] ? get_unmapped_area+0x1f5/0x3f0 [ 30.838325] do_mmap+0x854/0xf00 [ 30.838778] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.839268] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.839824] ksys_mmap_pgoff+0x3af/0x500 [ 30.840324] do_syscall_64+0x3f/0x90 [ 30.840805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.841450] RIP: 0033:0x7f1eff2b0d82 [ 30.841906] 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 [ 30.844023] RSP: 002b:00007ffd80738b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.844922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1eff2b0d82 [ 30.845760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1efe6ea000 [ 30.846615] RBP: 00007f1efe6ea000 R08: 0000000000000009 R09: 0000000000001000 [ 30.847454] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cc69b1ec0 [ 30.848299] R13: 00007ffd80738b20 R14: 00007ffd80738b50 R15: 00007ffd80738eb0 [ 30.849144] [ 30.849438] [ 30.849650] Allocated by task 212: [ 30.850071] kasan_save_stack+0x22/0x50 [ 30.850592] kasan_set_track+0x25/0x30 [ 30.851088] __kasan_slab_alloc+0x59/0x70 [ 30.851605] kmem_cache_alloc+0x16b/0x370 [ 30.852114] vm_area_dup+0x20/0x160 [ 30.852566] __split_vma+0x170/0x950 [ 30.853025] split_vma+0xc6/0x110 [ 30.853470] mprotect_fixup+0x8d2/0xb30 [ 30.853968] do_mprotect_pkey+0x87e/0xd40 [ 30.854493] __x64_sys_mprotect+0x78/0xc0 [ 30.855007] do_syscall_64+0x3f/0x90 [ 30.855481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.856123] [ 30.856335] Freed by task 212: [ 30.856721] kasan_save_stack+0x22/0x50 [ 30.857221] kasan_set_track+0x25/0x30 [ 30.857710] kasan_save_free_info+0x2b/0x50 [ 30.858238] __kasan_slab_free+0x10a/0x190 [ 30.858779] kmem_cache_free+0x10d/0x4d0 [ 30.859285] rcu_core+0x8c8/0x2860 [ 30.859733] __do_softirq+0x1b7/0x7d4 [ 30.860213] [ 30.860425] Last potentially related work creation: [ 30.861004] kasan_save_stack+0x22/0x50 [ 30.861510] __kasan_record_aux_stack+0x8e/0xa0 [ 30.862080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.862732] remove_vma+0x139/0x170 [ 30.863179] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.863730] do_vmi_munmap+0x1f1/0x2b0 [ 30.864213] __vm_munmap+0x138/0x3a0 [ 30.864678] __x64_sys_munmap+0x59/0x80 [ 30.865170] do_syscall_64+0x3f/0x90 [ 30.865641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.866282] [ 30.866502] Second to last potentially related work creation: [ 30.867179] kasan_save_stack+0x22/0x50 [ 30.867679] __kasan_record_aux_stack+0x8e/0xa0 [ 30.868246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.868879] remove_vma+0x139/0x170 [ 30.869325] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.869877] do_vmi_munmap+0x1f1/0x2b0 [ 30.870355] __vm_munmap+0x138/0x3a0 [ 30.870833] elf_map+0x26f/0x310 [ 30.871272] load_elf_binary+0xd82/0x5030 [ 30.871789] bprm_execve+0x803/0x1940 [ 30.872255] do_execveat_common+0x734/0x8e0 [ 30.872776] __x64_sys_execve+0x93/0xc0 [ 30.873261] do_syscall_64+0x3f/0x90 [ 30.873736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874365] [ 30.874586] The buggy address belongs to the object at ffff88800ee61e80 [ 30.874586] which belongs to the cache vm_area_struct of size 168 [ 30.876039] The buggy address is located 88 bytes inside of [ 30.876039] freed 168-byte region [ffff88800ee61e80, ffff88800ee61f28) [ 30.877416] [ 30.877633] The buggy address belongs to the physical page: [ 30.878283] page:00000000dcb54ed0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ee61740 pfn:0xee61 [ 30.879520] memcg:ffff888009789801 [ 30.879942] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.880577] page_type: 0xffffffff() [ 30.881020] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b4fc0 dead000000000002 [ 30.881925] raw: ffff88800ee61740 000000008011000f 00000001ffffffff ffff888009789801 [ 30.882831] page dumped because: kasan: bad access detected [ 30.883484] [ 30.883700] Memory state around the buggy address: [ 30.884271] ffff88800ee61d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.885113] ffff88800ee61e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.885958] >ffff88800ee61e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.886810] ^ [ 30.887536] ffff88800ee61f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.888385] ffff88800ee61f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.889222] ================================================================== [ 30.890314] Disabling lock debugging due to kernel taint [ 32.892897] BUG: Bad rss-counter state mm:00000000f36a80ab type:MM_FILEPAGES val:33 [ 32.893883] BUG: Bad rss-counter state mm:00000000f36a80ab type:MM_ANONPAGES val:22 [ 33.376706] BUG: Bad rss-counter state mm:00000000e62a2411 type:MM_FILEPAGES val:33 [ 33.377709] BUG: Bad rss-counter state mm:00000000e62a2411 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20596' (ECDSA) to the list of known hosts. 2023/06/20 18:43:18 fuzzer started 2023/06/20 18:43:18 dialing manager at localhost:36067 2023/06/20 18:43:18 checking machine... 2023/06/20 18:43:18 checking revisions... [ 34.101813] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:43:18 testing simple program... [ 34.152915] cgroup: Unknown subsys name 'net' [ 34.189658] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:43:18 Registers: info registers vcpu 0 RAX=1ffffffff0c7664d RBX=0000000000000001 RCX=ffffffff863b3266 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff863b3268 RBP=ffff888016f3f9f8 RSP=ffff888016f3f930 R8 =ffffffff863b326a R9 =ffff888016f3f9e0 R10=0000000000038001 R11=000000000008a8e5 R12=ffff888016f3fa00 R13=ffff888016f3f9e8 R14=ffff888016f3fe80 R15=ffff888016f3f9a0 RIP=ffffffff811311c7 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 00007f617e52a900 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=00007f617eae20b0 CR3=0000000018d5e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f74998b2020 CR3=00000000145e2000 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=2037313a33343a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a33343a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000