syzkaller login: [ 28.712059] BUG: Bad rss-counter state mm:000000002f48bcd4 type:MM_FILEPAGES val:33 [ 28.713593] BUG: Bad rss-counter state mm:000000002f48bcd4 type:MM_ANONPAGES val:22 [ 28.887305] ================================================================== [ 28.888383] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.889514] Read of size 8 at addr ffff88801a2c35c8 by task sshd/221 [ 28.890452] [ 28.890678] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.891539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.892539] Call Trace: [ 28.892870] [ 28.893155] dump_stack_lvl+0x91/0xf0 [ 28.893649] print_report+0xcc/0x620 [ 28.894134] ? __virt_addr_valid+0x102/0x340 [ 28.894686] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.895320] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.895944] kasan_report+0xbe/0xf0 [ 28.896419] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.897054] vma_interval_tree_remove+0xc75/0xec0 [ 28.897663] vma_prepare+0xc54/0x11a0 [ 28.898147] __split_vma+0x5af/0x950 [ 28.898620] ? __pfx___split_vma+0x10/0x10 [ 28.899150] ? find_held_lock+0x2c/0x110 [ 28.899679] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.900242] ? lock_is_held_type+0x9f/0x120 [ 28.900798] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.901397] ? mtree_range_walk+0x632/0x900 [ 28.901946] ? mas_walk+0x5c7/0x7c0 [ 28.902424] do_vmi_munmap+0x1f1/0x2b0 [ 28.902912] mmap_region+0x1f9/0x2660 [ 28.903395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.903910] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.904623] ? __pfx_lock_acquire+0x10/0x10 [ 28.905167] ? __pfx_mmap_region+0x10/0x10 [ 28.905699] ? security_mmap_addr+0x7d/0xa0 [ 28.906225] ? get_unmapped_area+0x1f5/0x3f0 [ 28.906774] do_mmap+0x854/0xf00 [ 28.907209] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.907704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.908274] ksys_mmap_pgoff+0x3af/0x500 [ 28.908799] do_syscall_64+0x3f/0x90 [ 28.909283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.909932] RIP: 0033:0x7ff4d61a7d82 [ 28.910384] 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 [ 28.912495] RSP: 002b:00007fff9ed43838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.913439] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4d61a7d82 [ 28.914307] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4d55e1000 [ 28.915162] RBP: 00007ff4d55e1000 R08: 0000000000000009 R09: 0000000000001000 [ 28.916011] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629202feec0 [ 28.916905] R13: 00007fff9ed43850 R14: 00007fff9ed43880 R15: 00007fff9ed43be0 [ 28.917788] [ 28.918084] [ 28.918300] Allocated by task 214: [ 28.918727] kasan_save_stack+0x22/0x50 [ 28.919241] kasan_set_track+0x25/0x30 [ 28.919742] __kasan_slab_alloc+0x59/0x70 [ 28.920271] kmem_cache_alloc+0x16b/0x370 [ 28.920791] vm_area_dup+0x20/0x160 [ 28.921252] __split_vma+0x170/0x950 [ 28.921722] split_vma+0xc6/0x110 [ 28.922168] mprotect_fixup+0x8d2/0xb30 [ 28.922678] do_mprotect_pkey+0x87e/0xd40 [ 28.923197] __x64_sys_mprotect+0x78/0xc0 [ 28.923718] do_syscall_64+0x3f/0x90 [ 28.924199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.924864] [ 28.925079] Freed by task 214: [ 28.925477] kasan_save_stack+0x22/0x50 [ 28.925975] kasan_set_track+0x25/0x30 [ 28.926464] kasan_save_free_info+0x2b/0x50 [ 28.926998] __kasan_slab_free+0x10a/0x190 [ 28.927532] kmem_cache_free+0x10d/0x4d0 [ 28.928034] rcu_core+0x8c8/0x2860 [ 28.928480] __do_softirq+0x1b7/0x7d4 [ 28.928977] [ 28.929195] Last potentially related work creation: [ 28.929786] kasan_save_stack+0x22/0x50 [ 28.930296] __kasan_record_aux_stack+0x8e/0xa0 [ 28.930880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.931519] remove_vma+0x139/0x170 [ 28.931975] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.932535] do_vmi_munmap+0x1f1/0x2b0 [ 28.933036] __vm_munmap+0x138/0x3a0 [ 28.933507] __x64_sys_munmap+0x59/0x80 [ 28.934005] do_syscall_64+0x3f/0x90 [ 28.934491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.935135] [ 28.935358] The buggy address belongs to the object at ffff88801a2c3570 [ 28.935358] which belongs to the cache vm_area_struct of size 168 [ 28.936865] The buggy address is located 88 bytes inside of [ 28.936865] freed 168-byte region [ffff88801a2c3570, ffff88801a2c3618) [ 28.938284] [ 28.938499] The buggy address belongs to the physical page: [ 28.939162] page:0000000076508012 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2c3 [ 28.940276] memcg:ffff888014566701 [ 28.940721] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.941358] page_type: 0xffffffff() [ 28.941813] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.942738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014566701 [ 28.943647] page dumped because: kasan: bad access detected [ 28.944305] [ 28.944521] Memory state around the buggy address: [ 28.945133] ffff88801a2c3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.946000] ffff88801a2c3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 28.946855] >ffff88801a2c3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.947704] ^ [ 28.948370] ffff88801a2c3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.949233] ffff88801a2c3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.950083] ================================================================== [ 28.951072] Disabling lock debugging due to kernel taint [ 30.778160] BUG: Bad rss-counter state mm:000000002058a827 type:MM_FILEPAGES val:33 [ 30.778996] BUG: Bad rss-counter state mm:000000002058a827 type:MM_ANONPAGES val:22 [ 31.193296] BUG: Bad rss-counter state mm:00000000d1eb2a59 type:MM_FILEPAGES val:33 [ 31.194120] BUG: Bad rss-counter state mm:00000000d1eb2a59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9822' (ECDSA) to the list of known hosts. 2023/06/20 12:24:58 fuzzer started 2023/06/20 12:24:58 dialing manager at localhost:36067 2023/06/20 12:24:58 checking machine... 2023/06/20 12:24:58 checking revisions... [ 31.853570] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:24:58 testing simple program... [ 31.894425] cgroup: Unknown subsys name 'net' [ 31.950637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:24:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fc8d0d5cd90 CR3=000000000976a000 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=3feb6402dea2018931421b4fa9d566ea XMM02=000000000011d910d59e07bde36eea69 XMM03=000000000011da38ec2efd57dc4c00df XMM04=5632e29bb457811400000000000ae988 XMM05=e43f08794795bc180000000000133190 XMM06=e4cb8bb95a7664b60000000000132048 XMM07=fb795ef6d657705600000000001221d8 XMM08=2c67c8bc2e329bc3000000000011da38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019cfb680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880168efd90 RSP=ffff8880168efbf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006cdbc0 R13=ffff888013a3c570 R14=ffff8880168efdb8 R15=ffffea00006cdbf4 RIP=ffffffff814c0404 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 00007f2ffb954900 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=00007f2ffc4a8044 CR3=000000001bc48000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c616e6729722f7420322e321c302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000