syzkaller login: [ 30.674960] BUG: Bad rss-counter state mm:00000000b2ed15e6 type:MM_FILEPAGES val:33 [ 30.675969] BUG: Bad rss-counter state mm:00000000b2ed15e6 type:MM_ANONPAGES val:22 [ 30.841225] ================================================================== [ 30.842133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.843110] Read of size 8 at addr ffff8880168b5df0 by task sshd/221 [ 30.843887] [ 30.844106] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.845080] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.846056] Call Trace: [ 30.846385] [ 30.846671] dump_stack_lvl+0x91/0xf0 [ 30.847162] print_report+0xcc/0x620 [ 30.847647] ? __virt_addr_valid+0x102/0x340 [ 30.848195] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.848809] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.849427] kasan_report+0xbe/0xf0 [ 30.849903] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850550] vma_interval_tree_remove+0xc75/0xec0 [ 30.851153] vma_prepare+0xc54/0x11a0 [ 30.851634] __split_vma+0x5af/0x950 [ 30.852105] ? __pfx___split_vma+0x10/0x10 [ 30.852636] ? find_held_lock+0x2c/0x110 [ 30.853157] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.853720] ? lock_is_held_type+0x9f/0x120 [ 30.854271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.854883] ? mtree_range_walk+0x632/0x900 [ 30.855466] ? mas_walk+0x5c7/0x7c0 [ 30.855948] do_vmi_munmap+0x1f1/0x2b0 [ 30.856443] mmap_region+0x1f9/0x2660 [ 30.856923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.857435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.858147] ? __pfx_lock_acquire+0x10/0x10 [ 30.858693] ? __pfx_mmap_region+0x10/0x10 [ 30.859221] ? security_mmap_addr+0x7d/0xa0 [ 30.859752] ? get_unmapped_area+0x1f5/0x3f0 [ 30.860296] do_mmap+0x854/0xf00 [ 30.860736] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.861235] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.861793] ksys_mmap_pgoff+0x3af/0x500 [ 30.862319] do_syscall_64+0x3f/0x90 [ 30.862807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.863455] RIP: 0033:0x7f275c227d82 [ 30.863923] 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 [ 30.866052] RSP: 002b:00007ffc24d367b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.866980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f275c227d82 [ 30.867834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f275b661000 [ 30.868683] RBP: 00007f275b661000 R08: 0000000000000009 R09: 0000000000001000 [ 30.869542] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1c2246f70 [ 30.870415] R13: 00007ffc24d367d0 R14: 00007ffc24d36800 R15: 00007ffc24d36b60 [ 30.871286] [ 30.871579] [ 30.871797] Allocated by task 214: [ 30.872227] kasan_save_stack+0x22/0x50 [ 30.872733] kasan_set_track+0x25/0x30 [ 30.873235] __kasan_slab_alloc+0x59/0x70 [ 30.873763] kmem_cache_alloc+0x16b/0x370 [ 30.874285] vm_area_dup+0x20/0x160 [ 30.874745] __split_vma+0x170/0x950 [ 30.875210] split_vma+0xc6/0x110 [ 30.875647] mprotect_fixup+0x8d2/0xb30 [ 30.876145] do_mprotect_pkey+0x87e/0xd40 [ 30.876673] __x64_sys_mprotect+0x78/0xc0 [ 30.877190] do_syscall_64+0x3f/0x90 [ 30.877672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.878325] [ 30.878540] Freed by task 214: [ 30.878930] kasan_save_stack+0x22/0x50 [ 30.879431] kasan_set_track+0x25/0x30 [ 30.879928] kasan_save_free_info+0x2b/0x50 [ 30.880461] __kasan_slab_free+0x10a/0x190 [ 30.881000] kmem_cache_free+0x10d/0x4d0 [ 30.881515] rcu_core+0x8c8/0x2860 [ 30.881961] __do_softirq+0x1b7/0x7d4 [ 30.882455] [ 30.882671] Last potentially related work creation: [ 30.883265] kasan_save_stack+0x22/0x50 [ 30.883783] __kasan_record_aux_stack+0x8e/0xa0 [ 30.884358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.885003] remove_vma+0x139/0x170 [ 30.885457] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.886025] do_vmi_munmap+0x1f1/0x2b0 [ 30.886517] __vm_munmap+0x138/0x3a0 [ 30.886985] __x64_sys_munmap+0x59/0x80 [ 30.887486] do_syscall_64+0x3f/0x90 [ 30.887961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.888605] [ 30.888830] The buggy address belongs to the object at ffff8880168b5d98 [ 30.888830] which belongs to the cache vm_area_struct of size 168 [ 30.890313] The buggy address is located 88 bytes inside of [ 30.890313] freed 168-byte region [ffff8880168b5d98, ffff8880168b5e40) [ 30.891714] [ 30.891934] The buggy address belongs to the physical page: [ 30.892602] page:000000000d97eea0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168b5 [ 30.893697] memcg:ffff88800fc54101 [ 30.894126] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.894786] page_type: 0xffffffff() [ 30.895241] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.896167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc54101 [ 30.897101] page dumped because: kasan: bad access detected [ 30.897826] [ 30.898045] Memory state around the buggy address: [ 30.898642] ffff8880168b5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.899537] ffff8880168b5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.900413] >ffff8880168b5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.901273] ^ [ 30.902086] ffff8880168b5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.902959] ffff8880168b5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.903807] ================================================================== [ 30.904969] Disabling lock debugging due to kernel taint [ 33.106958] BUG: Bad rss-counter state mm:0000000013171b53 type:MM_FILEPAGES val:33 [ 33.108566] BUG: Bad rss-counter state mm:0000000013171b53 type:MM_ANONPAGES val:22 [ 33.613000] BUG: Bad rss-counter state mm:0000000011ef4ce3 type:MM_FILEPAGES val:33 [ 33.613973] BUG: Bad rss-counter state mm:0000000011ef4ce3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55951' (ECDSA) to the list of known hosts. 2023/06/20 22:45:38 fuzzer started 2023/06/20 22:45:39 dialing manager at localhost:36067 2023/06/20 22:45:39 checking machine... 2023/06/20 22:45:39 checking revisions... [ 34.328239] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:45:39 testing simple program... [ 34.374353] cgroup: Unknown subsys name 'net' [ 34.432762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:45:38 Registers: info registers vcpu 0 RAX=00007fd874e35000 RBX=00007fff736a6d10 RCX=057efcb071e13aec RDX=000000000000001a RSI=00007fff736a6d10 RDI=00005615572b82d0 RBP=000000000000001a RSP=00007fff736a6750 R8 =00007fff736a6808 R9 =00007fff736a6800 R10=00007fd87506ca34 R11=000000000000db44 R12=00007fff736a6d10 R13=057efcb071e13aec R14=00005615572b82d0 R15=00007fff736a6808 RIP=00007fd874ffb4dd RFL=00000202 [-------] 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 00007fd874477900 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=00007fd8738ed220 CR3=000000000d606000 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=3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d3d XMM01=00000000000000000000000000000000 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=1e152aa8367a429c00000000000ae988 XMM05=233b6699217286f30000000000132400 XMM06=c291bd5c70af25b900000000001311f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc18 RBX=ffffffff85dfe0c4 RCX=ffffffff8180ca59 RDX=0000000000000000 RSI=ffffffff86138f52 RDI=ffffffff85dfe0a0 RBP=ffffffff85dfe0a0 RSP=ffff888017dff650 R8 =ffffffff86138f52 R9 =ffff888017dff748 R10=0000000000038001 R11=0000000000020db7 R12=ffffffff85dfe0e8 R13=ffffffff85dfe0a0 R14=ffffffff85dfe0a0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f53be845900 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=00007ffda8640000 CR3=0000000009978000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000