syzkaller login: [ 31.139019] BUG: Bad rss-counter state mm:00000000f1a6173f type:MM_FILEPAGES val:33 [ 31.140218] BUG: Bad rss-counter state mm:00000000f1a6173f type:MM_ANONPAGES val:22 [ 31.177778] ================================================================== [ 31.178709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.179652] Read of size 8 at addr ffff88800d618b38 by task sshd/219 [ 31.180486] [ 31.180707] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.181579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.182570] Call Trace: [ 31.182889] [ 31.183170] dump_stack_lvl+0x91/0xf0 [ 31.183670] print_report+0xcc/0x620 [ 31.184154] ? __virt_addr_valid+0x102/0x340 [ 31.184704] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185321] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185965] kasan_report+0xbe/0xf0 [ 31.186441] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187066] vma_interval_tree_remove+0xc75/0xec0 [ 31.187680] vma_prepare+0xc54/0x11a0 [ 31.188156] __split_vma+0x5af/0x950 [ 31.188624] ? __pfx___split_vma+0x10/0x10 [ 31.189148] ? find_held_lock+0x2c/0x110 [ 31.189665] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.190241] ? lock_is_held_type+0x9f/0x120 [ 31.190781] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.191382] ? mtree_range_walk+0x632/0x900 [ 31.191945] ? mas_walk+0x5c7/0x7c0 [ 31.192419] do_vmi_munmap+0x1f1/0x2b0 [ 31.192918] mmap_region+0x1f9/0x2660 [ 31.193399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.193945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.194661] ? __pfx_lock_acquire+0x10/0x10 [ 31.195192] ? __pfx_mmap_region+0x10/0x10 [ 31.195727] ? security_mmap_addr+0x7d/0xa0 [ 31.196256] ? get_unmapped_area+0x1f5/0x3f0 [ 31.196813] do_mmap+0x854/0xf00 [ 31.197252] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.197753] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.198321] ksys_mmap_pgoff+0x3af/0x500 [ 31.198833] do_syscall_64+0x3f/0x90 [ 31.199313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.199968] RIP: 0033:0x7f0214749d82 [ 31.200428] 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 [ 31.202590] RSP: 002b:00007ffcbfa914a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.203504] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0214749d82 [ 31.204356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0213b83000 [ 31.205198] RBP: 00007f0213b83000 R08: 0000000000000009 R09: 0000000000001000 [ 31.206057] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d1918aec0 [ 31.206918] R13: 00007ffcbfa914c0 R14: 00007ffcbfa914f0 R15: 00007ffcbfa91850 [ 31.207786] [ 31.208083] [ 31.208302] Allocated by task 212: [ 31.208741] kasan_save_stack+0x22/0x50 [ 31.209244] kasan_set_track+0x25/0x30 [ 31.209744] __kasan_slab_alloc+0x59/0x70 [ 31.210276] kmem_cache_alloc+0x16b/0x370 [ 31.210790] vm_area_dup+0x20/0x160 [ 31.211253] __split_vma+0x170/0x950 [ 31.211726] split_vma+0xc6/0x110 [ 31.212170] mprotect_fixup+0x8d2/0xb30 [ 31.212676] do_mprotect_pkey+0x87e/0xd40 [ 31.213201] __x64_sys_mprotect+0x78/0xc0 [ 31.213725] do_syscall_64+0x3f/0x90 [ 31.214216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.214863] [ 31.215080] Freed by task 212: [ 31.215486] kasan_save_stack+0x22/0x50 [ 31.215994] kasan_set_track+0x25/0x30 [ 31.216494] kasan_save_free_info+0x2b/0x50 [ 31.217036] __kasan_slab_free+0x10a/0x190 [ 31.217571] kmem_cache_free+0x10d/0x4d0 [ 31.218091] rcu_core+0x8c8/0x2860 [ 31.218536] __do_softirq+0x1b7/0x7d4 [ 31.219013] [ 31.219227] Last potentially related work creation: [ 31.219811] kasan_save_stack+0x22/0x50 [ 31.220319] __kasan_record_aux_stack+0x8e/0xa0 [ 31.220894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.221543] remove_vma+0x139/0x170 [ 31.222018] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.222585] do_vmi_munmap+0x1f1/0x2b0 [ 31.223082] __vm_munmap+0x138/0x3a0 [ 31.223553] __x64_sys_munmap+0x59/0x80 [ 31.224055] do_syscall_64+0x3f/0x90 [ 31.224535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225176] [ 31.225393] The buggy address belongs to the object at ffff88800d618ae0 [ 31.225393] which belongs to the cache vm_area_struct of size 168 [ 31.226865] The buggy address is located 88 bytes inside of [ 31.226865] freed 168-byte region [ffff88800d618ae0, ffff88800d618b88) [ 31.228269] [ 31.228486] The buggy address belongs to the physical page: [ 31.229147] page:00000000613d4a34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd618 [ 31.230253] memcg:ffff88800e43ff01 [ 31.230686] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.231389] page_type: 0xffffffff() [ 31.231850] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.232783] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e43ff01 [ 31.233698] page dumped because: kasan: bad access detected [ 31.234390] [ 31.234614] Memory state around the buggy address: [ 31.235198] ffff88800d618a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.236057] ffff88800d618a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.236932] >ffff88800d618b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.237835] ^ [ 31.238486] ffff88800d618b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.239400] ffff88800d618c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.240292] ================================================================== [ 31.241481] Disabling lock debugging due to kernel taint [ 33.513679] BUG: Bad rss-counter state mm:00000000bbc51c16 type:MM_FILEPAGES val:33 [ 33.514831] BUG: Bad rss-counter state mm:00000000bbc51c16 type:MM_ANONPAGES val:22 [ 33.988734] BUG: Bad rss-counter state mm:0000000074d28882 type:MM_FILEPAGES val:33 [ 33.989794] BUG: Bad rss-counter state mm:0000000074d28882 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55174' (ECDSA) to the list of known hosts. 2023/06/20 13:06:58 fuzzer started 2023/06/20 13:06:58 dialing manager at localhost:36067 2023/06/20 13:06:58 checking machine... 2023/06/20 13:06:58 checking revisions... [ 34.714748] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:06:58 testing simple program... [ 34.753407] cgroup: Unknown subsys name 'net' [ 34.792129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:06:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=00007ffc31a63d34 RSI=000000000000541b RDI=0000000000000005 RBP=00007ffc31a641a0 RSP=00007ffc31a63d08 R8 =0000000000000000 R9 =00007ffc31a72080 R10=00007ffc31a720f0 R11=000000000000e512 R12=00007ffc31a640d8 R13=000055c47f722360 R14=0000000000000100 R15=0000000000000005 RIP=00007fe7cf807cc0 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe7cef48900 00000000 00000000 GS =0000 0000000000000000 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=00007fe7ce3dcd50 CR3=000000000ed38000 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=923e1b2304ee11bc6647aa1ac03b2889 XMM02=000000000011b408eff9b2d0a8fce9cb XMM03=000000000011b4d82c67c8bc2e329bc3 XMM04=0e33a81dd50410b000000000000ae988 XMM05=e401b834aa9c4bee0000000000133260 XMM06=806171799158d9670000000000131ce0 XMM07=fb795ef6d65770560000000000122240 XMM08=2c67c8bc2e329bc3000000000011b478 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007f95174d20b0 CR3=000000000dd30000 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=2037353a36303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000