syzkaller login: [ 31.031057] BUG: Bad rss-counter state mm:00000000282f2e89 type:MM_FILEPAGES val:33 [ 31.031743] BUG: Bad rss-counter state mm:00000000282f2e89 type:MM_ANONPAGES val:22 [ 31.185045] ================================================================== [ 31.185682] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.186317] Read of size 8 at addr ffff888018cf8880 by task sshd/219 [ 31.186823] [ 31.187091] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.187647] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.195228] Call Trace: [ 31.195440] [ 31.195632] dump_stack_lvl+0x91/0xf0 [ 31.195971] print_report+0xcc/0x620 [ 31.196292] ? __virt_addr_valid+0x102/0x340 [ 31.196658] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197062] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.197464] kasan_report+0xbe/0xf0 [ 31.197780] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.198193] vma_interval_tree_remove+0xc75/0xec0 [ 31.198592] vma_prepare+0xc54/0x11a0 [ 31.198912] __split_vma+0x5af/0x950 [ 31.199565] ? __pfx___split_vma+0x10/0x10 [ 31.199950] ? find_held_lock+0x2c/0x110 [ 31.200304] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.200671] ? lock_is_held_type+0x9f/0x120 [ 31.201033] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.201431] ? mtree_range_walk+0x632/0x900 [ 31.201792] ? mas_walk+0x5c7/0x7c0 [ 31.202113] do_vmi_munmap+0x1f1/0x2b0 [ 31.202443] mmap_region+0x1f9/0x2660 [ 31.202770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.203196] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.203677] ? __pfx_lock_acquire+0x10/0x10 [ 31.204046] ? __pfx_mmap_region+0x10/0x10 [ 31.204403] ? security_mmap_addr+0x7d/0xa0 [ 31.204763] ? get_unmapped_area+0x1f5/0x3f0 [ 31.205140] do_mmap+0x854/0xf00 [ 31.205435] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.205771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.206151] ksys_mmap_pgoff+0x3af/0x500 [ 31.206495] do_syscall_64+0x3f/0x90 [ 31.206804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207324] RIP: 0033:0x7f9ed3936d82 [ 31.207612] 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 [ 31.209223] RSP: 002b:00007fffecb12f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.209906] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ed3936d82 [ 31.210560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ed2d70000 [ 31.211205] RBP: 00007f9ed2d70000 R08: 0000000000000009 R09: 0000000000001000 [ 31.211840] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e5916bec0 [ 31.212486] R13: 00007fffecb12fa0 R14: 00007fffecb12fd0 R15: 00007fffecb13330 [ 31.213134] [ 31.213365] [ 31.213527] Allocated by task 212: [ 31.213846] kasan_save_stack+0x22/0x50 [ 31.214228] kasan_set_track+0x25/0x30 [ 31.214587] __kasan_slab_alloc+0x59/0x70 [ 31.215110] kmem_cache_alloc+0x16b/0x370 [ 31.215492] vm_area_dup+0x20/0x160 [ 31.215838] __split_vma+0x170/0x950 [ 31.216183] split_vma+0xc6/0x110 [ 31.216504] mprotect_fixup+0x8d2/0xb30 [ 31.216872] do_mprotect_pkey+0x87e/0xd40 [ 31.217266] __x64_sys_mprotect+0x78/0xc0 [ 31.217646] do_syscall_64+0x3f/0x90 [ 31.217998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218481] [ 31.218642] Freed by task 19: [ 31.218930] kasan_save_stack+0x22/0x50 [ 31.219430] kasan_set_track+0x25/0x30 [ 31.219772] kasan_save_free_info+0x2b/0x50 [ 31.220154] __kasan_slab_free+0x10a/0x190 [ 31.220547] kmem_cache_free+0x10d/0x4d0 [ 31.220941] rcu_core+0x8c8/0x2860 [ 31.221290] __do_softirq+0x1b7/0x7d4 [ 31.221642] [ 31.221805] Last potentially related work creation: [ 31.222241] kasan_save_stack+0x22/0x50 [ 31.222611] __kasan_record_aux_stack+0x8e/0xa0 [ 31.223143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.223636] remove_vma+0x139/0x170 [ 31.223990] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.224432] do_vmi_munmap+0x1f1/0x2b0 [ 31.224795] __vm_munmap+0x138/0x3a0 [ 31.225153] __x64_sys_munmap+0x59/0x80 [ 31.225531] do_syscall_64+0x3f/0x90 [ 31.225892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.226375] [ 31.226535] Second to last potentially related work creation: [ 31.227114] kasan_save_stack+0x22/0x50 [ 31.227498] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228516] remove_vma+0x139/0x170 [ 31.228865] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.229297] do_vmi_munmap+0x1f1/0x2b0 [ 31.229645] mmap_region+0x1f9/0x2660 [ 31.230016] do_mmap+0x854/0xf00 [ 31.230349] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.230718] ksys_mmap_pgoff+0x3af/0x500 [ 31.231116] do_syscall_64+0x3f/0x90 [ 31.231467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231945] [ 31.232111] The buggy address belongs to the object at ffff888018cf8828 [ 31.232111] which belongs to the cache vm_area_struct of size 168 [ 31.233205] The buggy address is located 88 bytes inside of [ 31.233205] freed 168-byte region [ffff888018cf8828, ffff888018cf88d0) [ 31.234265] [ 31.234434] The buggy address belongs to the physical page: [ 31.234928] page:000000005592a4a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cf8 [ 31.235857] memcg:ffff888015883301 [ 31.236177] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.236679] page_type: 0xffffffff() [ 31.237010] raw: 0100000000000200 ffff88800879fc80 ffffea0000633ec0 0000000000000005 [ 31.237655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015883301 [ 31.238309] page dumped because: kasan: bad access detected [ 31.238784] [ 31.239060] Memory state around the buggy address: [ 31.239522] ffff888018cf8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.240143] ffff888018cf8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.240755] >ffff888018cf8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.241447] ^ [ 31.241742] ffff888018cf8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.242378] ffff888018cf8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.243355] ================================================================== [ 31.255215] Disabling lock debugging due to kernel taint [ 34.107975] BUG: Bad rss-counter state mm:0000000017c94d83 type:MM_FILEPAGES val:33 [ 34.108676] BUG: Bad rss-counter state mm:0000000017c94d83 type:MM_ANONPAGES val:22 [ 34.595060] BUG: Bad rss-counter state mm:00000000cb19967a type:MM_FILEPAGES val:33 [ 34.599679] BUG: Bad rss-counter state mm:00000000cb19967a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55229' (ECDSA) to the list of known hosts. 2023/06/20 09:54:41 fuzzer started 2023/06/20 09:54:41 dialing manager at localhost:44161 2023/06/20 09:54:41 checking machine... 2023/06/20 09:54:41 checking revisions... [ 35.541267] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:54:41 testing simple program... [ 35.592459] cgroup: Unknown subsys name 'net' [ 35.647996] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:54:41 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888019db1b40 RSI=ffffffff84e383a0 RDI=0000000000000001 RBP=ffffffff84e383a0 RSP=ffff88801617fab0 R8 =0000000000000006 R9 =ffffffffffffffff R10=00007feafbb2d000 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000005 R14=0000000000000003 R15=ffff88801617fc98 RIP=ffffffff814c0414 RFL=00000246 [---Z-P-] 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 0000000000000000 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=00007feafb553328 CR3=000000000fd1a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888018ed1b40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff888018ed1f34 RBP=ffff888018ed1b40 RSP=ffff88801003f448 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888018ed1b40 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000092cc0 RIP=ffffffff8137454d RFL=00000213 [----A-C] 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 00007f3999246900 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=00007f85499d3c30 CR3=000000000ed02000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000