syzkaller login: [ 36.049700] BUG: Bad rss-counter state mm:000000002c8ef651 type:MM_FILEPAGES val:33 [ 36.050954] BUG: Bad rss-counter state mm:000000002c8ef651 type:MM_ANONPAGES val:22 [ 36.091461] ================================================================== [ 36.092411] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.093470] Read of size 8 at addr ffff8880165a3a50 by task sshd/220 [ 36.094241] [ 36.094456] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.095332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.096332] Call Trace: [ 36.096680] [ 36.096967] dump_stack_lvl+0x91/0xf0 [ 36.097470] print_report+0xcc/0x620 [ 36.097963] ? __virt_addr_valid+0x102/0x340 [ 36.098518] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.099131] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.099778] kasan_report+0xbe/0xf0 [ 36.100267] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.100910] vma_interval_tree_remove+0xc75/0xec0 [ 36.101524] vma_prepare+0xc54/0x11a0 [ 36.102010] __split_vma+0x5af/0x950 [ 36.102496] ? __pfx___split_vma+0x10/0x10 [ 36.103026] ? find_held_lock+0x2c/0x110 [ 36.103558] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.104133] ? lock_is_held_type+0x9f/0x120 [ 36.104691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.105308] ? mtree_range_walk+0x632/0x900 [ 36.105858] ? mas_walk+0x5c7/0x7c0 [ 36.106340] do_vmi_munmap+0x1f1/0x2b0 [ 36.106839] mmap_region+0x1f9/0x2660 [ 36.107325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.107844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.108570] ? __pfx_lock_acquire+0x10/0x10 [ 36.109126] ? __pfx_mmap_region+0x10/0x10 [ 36.109656] ? security_mmap_addr+0x7d/0xa0 [ 36.110189] ? get_unmapped_area+0x1f5/0x3f0 [ 36.110752] do_mmap+0x854/0xf00 [ 36.111193] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.111696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.112265] ksys_mmap_pgoff+0x3af/0x500 [ 36.112790] do_syscall_64+0x3f/0x90 [ 36.113286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.113939] RIP: 0033:0x7ffb3c8b0d82 [ 36.114397] 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 [ 36.116551] RSP: 002b:00007ffe889880b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.117479] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb3c8b0d82 [ 36.118330] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb3bcea000 [ 36.119174] RBP: 00007ffb3bcea000 R08: 0000000000000009 R09: 0000000000001000 [ 36.120033] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ffe742ec0 [ 36.120909] R13: 00007ffe889880d0 R14: 00007ffe88988100 R15: 00007ffe88988460 [ 36.121780] [ 36.122078] [ 36.122301] Allocated by task 213: [ 36.122734] kasan_save_stack+0x22/0x50 [ 36.123264] kasan_set_track+0x25/0x30 [ 36.123769] __kasan_slab_alloc+0x59/0x70 [ 36.124308] kmem_cache_alloc+0x16b/0x370 [ 36.124843] vm_area_dup+0x20/0x160 [ 36.125311] __split_vma+0x170/0x950 [ 36.125790] split_vma+0xc6/0x110 [ 36.126245] mprotect_fixup+0x8d2/0xb30 [ 36.126759] do_mprotect_pkey+0x87e/0xd40 [ 36.127280] __x64_sys_mprotect+0x78/0xc0 [ 36.127815] do_syscall_64+0x3f/0x90 [ 36.128298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.128957] [ 36.129174] Freed by task 213: [ 36.129569] kasan_save_stack+0x22/0x50 [ 36.130077] kasan_set_track+0x25/0x30 [ 36.130577] kasan_save_free_info+0x2b/0x50 [ 36.131120] __kasan_slab_free+0x10a/0x190 [ 36.131657] kmem_cache_free+0x10d/0x4d0 [ 36.132175] rcu_core+0x8c8/0x2860 [ 36.132638] __do_softirq+0x1b7/0x7d4 [ 36.133131] [ 36.133346] Last potentially related work creation: [ 36.133935] kasan_save_stack+0x22/0x50 [ 36.134446] __kasan_record_aux_stack+0x8e/0xa0 [ 36.135021] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.135684] remove_vma+0x139/0x170 [ 36.136140] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.136727] do_vmi_munmap+0x1f1/0x2b0 [ 36.137215] __vm_munmap+0x138/0x3a0 [ 36.137682] __x64_sys_munmap+0x59/0x80 [ 36.138189] do_syscall_64+0x3f/0x90 [ 36.138663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.139314] [ 36.139534] The buggy address belongs to the object at ffff8880165a39f8 [ 36.139534] which belongs to the cache vm_area_struct of size 168 [ 36.141045] The buggy address is located 88 bytes inside of [ 36.141045] freed 168-byte region [ffff8880165a39f8, ffff8880165a3aa0) [ 36.142465] [ 36.142685] The buggy address belongs to the physical page: [ 36.143357] page:000000001818875a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165a3 [ 36.144478] memcg:ffff888019ff3901 [ 36.144911] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.145552] page_type: 0xffffffff() [ 36.146007] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.146934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ff3901 [ 36.147855] page dumped because: kasan: bad access detected [ 36.148519] [ 36.148739] Memory state around the buggy address: [ 36.149323] ffff8880165a3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.150186] ffff8880165a3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.151049] >ffff8880165a3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.151905] ^ [ 36.152630] ffff8880165a3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.153498] ffff8880165a3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.154361] ================================================================== [ 36.155487] Disabling lock debugging due to kernel taint [ 38.045265] BUG: Bad rss-counter state mm:00000000c41b83ba type:MM_FILEPAGES val:33 [ 38.046478] BUG: Bad rss-counter state mm:00000000c41b83ba type:MM_ANONPAGES val:22 [ 38.546480] BUG: Bad rss-counter state mm:00000000a6b8b9a6 type:MM_FILEPAGES val:33 [ 38.547524] BUG: Bad rss-counter state mm:00000000a6b8b9a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28927' (ECDSA) to the list of known hosts. 2023/06/20 05:16:51 fuzzer started 2023/06/20 05:16:51 dialing manager at localhost:44161 2023/06/20 05:16:51 checking machine... 2023/06/20 05:16:51 checking revisions... [ 39.313086] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:16:51 testing simple program... [ 39.363325] cgroup: Unknown subsys name 'net' [ 39.418841] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:16:46 Registers: info registers vcpu 0 RAX=0000000000000018 RBX=0000000000000018 RCX=ffffffff8449f02b RDX=ffff88800e479b40 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff888016dedc08 RSP=ffff888018a2fce0 R8 =0000000000000006 R9 =00007f644925a650 R10=00007f6449256fff R11=0000000000000000 R12=0000000000000002 R13=0000000000000008 R14=00007f644925a650 R15=00007f6449256fff RIP=ffffffff814c07e0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6448ca5900 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=00007f644925a650 CR3=000000000f6ae000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002bac179 RBX=ffff888015d60bc8 RCX=ffffffff8196c0a2 RDX=ffffed1002bac17a RSI=0000000000000008 RDI=ffff888015d60bc8 RBP=dffffc0000000000 RSP=ffff88800d63fa38 R8 =0000000000000000 R9 =ffffed1002bac179 R10=ffff888015d60bcf R11=0000000000000000 R12=ffffea0000619200 R13=ffff888015d60bc8 R14=0000000000800000 R15=ffff888015dfdfc8 RIP=ffffffff8196c0ad 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0bd3e37900 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=00007f0bd3238590 CR3=0000000010360000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=89b1b2ebe005bbc500000000000ae988 XMM05=a3666c1023f0c23000000000001344c0 XMM06=19e9129bd510f2350000000000133358 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000