syzkaller login: [ 32.141654] BUG: Bad rss-counter state mm:000000001348c566 type:MM_FILEPAGES val:33 [ 32.142670] BUG: Bad rss-counter state mm:000000001348c566 type:MM_ANONPAGES val:22 [ 32.180920] ================================================================== [ 32.182021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.183265] Read of size 8 at addr ffff88800e0b3968 by task sshd/220 [ 32.184139] [ 32.184394] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.185375] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.186527] Call Trace: [ 32.186895] [ 32.187217] dump_stack_lvl+0x91/0xf0 [ 32.187772] print_report+0xcc/0x620 [ 32.188319] ? __virt_addr_valid+0x102/0x340 [ 32.188949] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.189651] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.190372] kasan_report+0xbe/0xf0 [ 32.190944] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.191664] vma_interval_tree_remove+0xc75/0xec0 [ 32.192368] vma_prepare+0xc54/0x11a0 [ 32.192926] __split_vma+0x5af/0x950 [ 32.193474] ? __pfx___split_vma+0x10/0x10 [ 32.194090] ? find_held_lock+0x2c/0x110 [ 32.194714] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.195370] ? lock_is_held_type+0x9f/0x120 [ 32.195993] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.196706] ? mtree_range_walk+0x632/0x900 [ 32.197347] ? mas_walk+0x5c7/0x7c0 [ 32.197903] do_vmi_munmap+0x1f1/0x2b0 [ 32.198496] mmap_region+0x1f9/0x2660 [ 32.199056] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.199653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.200490] ? __pfx_lock_acquire+0x10/0x10 [ 32.201113] ? __pfx_mmap_region+0x10/0x10 [ 32.201728] ? security_mmap_addr+0x7d/0xa0 [ 32.202342] ? get_unmapped_area+0x1f5/0x3f0 [ 32.202988] do_mmap+0x854/0xf00 [ 32.203495] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.204077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.204732] ksys_mmap_pgoff+0x3af/0x500 [ 32.205313] do_syscall_64+0x3f/0x90 [ 32.205862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.206622] RIP: 0033:0x7f47bfea8d82 [ 32.207148] 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 [ 32.209597] RSP: 002b:00007fffb244caf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.210658] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47bfea8d82 [ 32.211634] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47bf2e2000 [ 32.212613] RBP: 00007f47bf2e2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.213580] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cade977f70 [ 32.214570] R13: 00007fffb244cb10 R14: 00007fffb244cb40 R15: 00007fffb244cea0 [ 32.215550] [ 32.215892] [ 32.216145] Allocated by task 213: [ 32.216633] kasan_save_stack+0x22/0x50 [ 32.217218] kasan_set_track+0x25/0x30 [ 32.217786] __kasan_slab_alloc+0x59/0x70 [ 32.218396] kmem_cache_alloc+0x16b/0x370 [ 32.218991] vm_area_dup+0x20/0x160 [ 32.219492] __split_vma+0x170/0x950 [ 32.219999] split_vma+0xc6/0x110 [ 32.220481] mprotect_fixup+0x8d2/0xb30 [ 32.221045] do_mprotect_pkey+0x87e/0xd40 [ 32.221619] __x64_sys_mprotect+0x78/0xc0 [ 32.222203] do_syscall_64+0x3f/0x90 [ 32.222739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.223473] [ 32.223716] Freed by task 213: [ 32.224152] kasan_save_stack+0x22/0x50 [ 32.224716] kasan_set_track+0x25/0x30 [ 32.225249] kasan_save_free_info+0x2b/0x50 [ 32.225849] __kasan_slab_free+0x10a/0x190 [ 32.226562] kmem_cache_free+0x10d/0x4d0 [ 32.227109] rcu_core+0x8c8/0x2860 [ 32.227580] __do_softirq+0x1b7/0x7d4 [ 32.228090] [ 32.228324] Last potentially related work creation: [ 32.228973] kasan_save_stack+0x22/0x50 [ 32.229533] __kasan_record_aux_stack+0x8e/0xa0 [ 32.230171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.230896] remove_vma+0x139/0x170 [ 32.231396] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.232011] do_vmi_munmap+0x1f1/0x2b0 [ 32.232549] __vm_munmap+0x138/0x3a0 [ 32.233069] __x64_sys_munmap+0x59/0x80 [ 32.233647] do_syscall_64+0x3f/0x90 [ 32.234178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.234904] [ 32.235149] The buggy address belongs to the object at ffff88800e0b3910 [ 32.235149] which belongs to the cache vm_area_struct of size 168 [ 32.236851] The buggy address is located 88 bytes inside of [ 32.236851] freed 168-byte region [ffff88800e0b3910, ffff88800e0b39b8) [ 32.238489] [ 32.238741] The buggy address belongs to the physical page: [ 32.239502] page:000000002e896ac9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b3 [ 32.240757] memcg:ffff88800e099f01 [ 32.241253] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.241997] page_type: 0xffffffff() [ 32.242523] raw: 0100000000000200 ffff88800879fc80 ffffea000037f8c0 dead000000000004 [ 32.243540] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e099f01 [ 32.244551] page dumped because: kasan: bad access detected [ 32.245285] [ 32.245522] Memory state around the buggy address: [ 32.246164] ffff88800e0b3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.247129] ffff88800e0b3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.248059] >ffff88800e0b3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.248988] ^ [ 32.249838] ffff88800e0b3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.250775] ffff88800e0b3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.251773] ================================================================== [ 32.253121] Disabling lock debugging due to kernel taint [ 34.611748] BUG: Bad rss-counter state mm:0000000042be8e81 type:MM_FILEPAGES val:33 [ 34.612788] BUG: Bad rss-counter state mm:0000000042be8e81 type:MM_ANONPAGES val:22 [ 35.048952] BUG: Bad rss-counter state mm:00000000e849807d type:MM_FILEPAGES val:33 [ 35.050137] BUG: Bad rss-counter state mm:00000000e849807d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49363' (ECDSA) to the list of known hosts. 2023/06/19 20:41:39 fuzzer started 2023/06/19 20:41:39 dialing manager at localhost:44161 2023/06/19 20:41:39 checking machine... 2023/06/19 20:41:39 checking revisions... [ 35.700524] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:41:40 testing simple program... [ 35.748374] cgroup: Unknown subsys name 'net' [ 35.797684] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:41:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85fa39b4 RCX=ffffffff8363de42 RDX=0000000000000000 RSI=ffffffff863b1c96 RDI=ffffffff85fa39b0 RBP=ffffffff85fa39b0 RSP=ffff88801a3bf988 R8 =ffffffff863b1c96 R9 =ffff88801a3bfa80 R10=0000000000038001 R11=000000000008a977 R12=ffffffff85fa39b0 R13=ffffffff85fa39b0 R14=ffffffff85fa39b0 R15=dffffc0000000000 RIP=ffffffff8112fc5d 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 00007fe348a0e900 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=00007fe348fc3650 CR3=0000000019c9e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c58400 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=00007fcca6c21e60 CR3=000000000d678000 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=5211eb491ec13a82ba4decee746170ae XMM02=000000000011f8e8ec2efd57dc4c00df XMM03=000000000012408859a9cfe716fa688a XMM04=635d97483e21a9f900000000000ae988 XMM05=19e9129bd510f2350000000000133bf8 XMM06=4fda316b135da52b0000000000133a80 XMM07=e042d86d42eb936e0000000000124308 XMM08=59a9cfe716fa688a000000000011f948 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000