syzkaller login: [ 32.147906] BUG: Bad rss-counter state mm:000000004fc03529 type:MM_FILEPAGES val:33 [ 32.149121] BUG: Bad rss-counter state mm:000000004fc03529 type:MM_ANONPAGES val:22 [ 32.193375] ================================================================== [ 32.194265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.195210] Read of size 8 at addr ffff88800e420880 by task sshd/219 [ 32.196268] [ 32.196518] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.197399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.198396] Call Trace: [ 32.198724] [ 32.199007] dump_stack_lvl+0x91/0xf0 [ 32.199509] print_report+0xcc/0x620 [ 32.199991] ? __virt_addr_valid+0x102/0x340 [ 32.200558] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.201179] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.201806] kasan_report+0xbe/0xf0 [ 32.202285] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.202904] vma_interval_tree_remove+0xc75/0xec0 [ 32.203507] vma_prepare+0xc54/0x11a0 [ 32.203983] __split_vma+0x5af/0x950 [ 32.204463] ? __pfx___split_vma+0x10/0x10 [ 32.204988] ? find_held_lock+0x2c/0x110 [ 32.205506] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.206068] ? lock_is_held_type+0x9f/0x120 [ 32.206611] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.207214] ? mtree_range_walk+0x632/0x900 [ 32.207763] ? mas_walk+0x5c7/0x7c0 [ 32.208238] do_vmi_munmap+0x1f1/0x2b0 [ 32.208754] mmap_region+0x1f9/0x2660 [ 32.209240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.209755] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.210469] ? __pfx_lock_acquire+0x10/0x10 [ 32.211000] ? __pfx_mmap_region+0x10/0x10 [ 32.211538] ? security_mmap_addr+0x7d/0xa0 [ 32.212065] ? get_unmapped_area+0x1f5/0x3f0 [ 32.212621] do_mmap+0x854/0xf00 [ 32.213063] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.213565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.214130] ksys_mmap_pgoff+0x3af/0x500 [ 32.214641] do_syscall_64+0x3f/0x90 [ 32.215120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.215771] RIP: 0033:0x7f1c5820fd82 [ 32.216227] 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 [ 32.218377] RSP: 002b:00007ffda5114c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.219302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c5820fd82 [ 32.220164] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c57649000 [ 32.221036] RBP: 00007f1c57649000 R08: 0000000000000009 R09: 0000000000001000 [ 32.221893] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffcfbb7f70 [ 32.222746] R13: 00007ffda5114c60 R14: 00007ffda5114c90 R15: 00007ffda5114ff0 [ 32.223620] [ 32.223916] [ 32.224133] Allocated by task 212: [ 32.224567] kasan_save_stack+0x22/0x50 [ 32.225076] kasan_set_track+0x25/0x30 [ 32.225575] __kasan_slab_alloc+0x59/0x70 [ 32.226104] kmem_cache_alloc+0x16b/0x370 [ 32.226618] vm_area_dup+0x20/0x160 [ 32.227075] __split_vma+0x170/0x950 [ 32.227545] split_vma+0xc6/0x110 [ 32.227985] mprotect_fixup+0x8d2/0xb30 [ 32.228504] do_mprotect_pkey+0x87e/0xd40 [ 32.229037] __x64_sys_mprotect+0x78/0xc0 [ 32.229566] do_syscall_64+0x3f/0x90 [ 32.230056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.230705] [ 32.230919] Freed by task 212: [ 32.231312] kasan_save_stack+0x22/0x50 [ 32.231812] kasan_set_track+0x25/0x30 [ 32.232309] kasan_save_free_info+0x2b/0x50 [ 32.232842] __kasan_slab_free+0x10a/0x190 [ 32.233376] kmem_cache_free+0x10d/0x4d0 [ 32.233884] rcu_core+0x8c8/0x2860 [ 32.234329] __do_softirq+0x1b7/0x7d4 [ 32.234870] [ 32.235086] Last potentially related work creation: [ 32.235683] kasan_save_stack+0x22/0x50 [ 32.236187] __kasan_record_aux_stack+0x8e/0xa0 [ 32.236782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.237424] remove_vma+0x139/0x170 [ 32.237874] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.238430] do_vmi_munmap+0x1f1/0x2b0 [ 32.238917] __vm_munmap+0x138/0x3a0 [ 32.239384] __x64_sys_munmap+0x59/0x80 [ 32.239880] do_syscall_64+0x3f/0x90 [ 32.240360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.240999] [ 32.241215] Second to last potentially related work creation: [ 32.241898] kasan_save_stack+0x22/0x50 [ 32.242400] __kasan_record_aux_stack+0x8e/0xa0 [ 32.242972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.243611] remove_vma+0x139/0x170 [ 32.244069] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.244633] do_vmi_munmap+0x1f1/0x2b0 [ 32.245118] __vm_munmap+0x138/0x3a0 [ 32.245584] elf_map+0x26f/0x310 [ 32.246030] load_elf_binary+0x3417/0x5030 [ 32.246576] bprm_execve+0x803/0x1940 [ 32.247045] do_execveat_common+0x734/0x8e0 [ 32.247577] __x64_sys_execve+0x93/0xc0 [ 32.248064] do_syscall_64+0x3f/0x90 [ 32.248556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.249199] [ 32.249418] The buggy address belongs to the object at ffff88800e420828 [ 32.249418] which belongs to the cache vm_area_struct of size 168 [ 32.250890] The buggy address is located 88 bytes inside of [ 32.250890] freed 168-byte region [ffff88800e420828, ffff88800e4208d0) [ 32.252293] [ 32.252517] The buggy address belongs to the physical page: [ 32.253186] page:00000000b06687a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe420 [ 32.254273] memcg:ffff88800d856601 [ 32.254698] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.255394] page_type: 0xffffffff() [ 32.255849] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.256797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d856601 [ 32.257702] page dumped because: kasan: bad access detected [ 32.258360] [ 32.258577] Memory state around the buggy address: [ 32.259158] ffff88800e420780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.260013] ffff88800e420800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.260878] >ffff88800e420880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.261729] ^ [ 32.262141] ffff88800e420900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.262993] ffff88800e420980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.263840] ================================================================== [ 32.264915] Disabling lock debugging due to kernel taint [ 34.672372] BUG: Bad rss-counter state mm:00000000baef746f type:MM_FILEPAGES val:33 [ 34.673546] BUG: Bad rss-counter state mm:00000000baef746f type:MM_ANONPAGES val:22 [ 35.202983] BUG: Bad rss-counter state mm:000000009d25c749 type:MM_FILEPAGES val:33 [ 35.204336] BUG: Bad rss-counter state mm:000000009d25c749 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43612' (ECDSA) to the list of known hosts. 2023/06/19 13:30:13 fuzzer started 2023/06/19 13:30:13 dialing manager at localhost:44161 2023/06/19 13:30:13 checking machine... 2023/06/19 13:30:13 checking revisions... [ 35.891451] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:30:14 testing simple program... [ 35.952099] cgroup: Unknown subsys name 'net' [ 36.019149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:30:13 Registers: info registers vcpu 0 RAX=0000000000010b7e RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=000000000000000d RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffff888017c174d0 RSP=ffff888017c173f8 R8 =ffffffff860d68c0 R9 =ffff888017c174b8 R10=0000000000038001 R11=0000000000010b7e R12=ffff888017c174d8 R13=ffff888017c174c0 R14=ffff888017c174b9 R15=ffff888017c17478 RIP=ffffffff8112fc12 RFL=00000212 [----A--] 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 00007f0a2e2d4700 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=00007fad1f94c0b0 CR3=000000000efbc000 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=2033313a30333a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a30333a3331203931 XMM08=3d656e696c646d632022656369767265 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=00007f5b6936b9a0 CR3=000000000cafa000 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=8958a270a61044b2f544682837317b61 XMM02=000000000011d600ec2efd57dc4c00df XMM03=0000000000123fc0d6a5369dbbad99e5 XMM04=2e43ce37d41784ae00000000000ae988 XMM05=a4f05f9c88c6dc340000000000135800 XMM06=806171799158d9670000000000134e88 XMM07=e042d86d42eb936e0000000000124298 XMM08=d6a5369dbbad99e5000000000011d660 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000