syzkaller login: [ 34.851893] BUG: Bad rss-counter state mm:00000000d81b7ed4 type:MM_FILEPAGES val:33 [ 34.853224] BUG: Bad rss-counter state mm:00000000d81b7ed4 type:MM_ANONPAGES val:22 [ 34.891535] ================================================================== [ 34.892529] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.893545] Read of size 8 at addr ffff88801959fc20 by task sshd/220 [ 34.894316] [ 34.894534] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.895395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.896367] Call Trace: [ 34.896686] [ 34.896968] dump_stack_lvl+0x91/0xf0 [ 34.897480] print_report+0xcc/0x620 [ 34.897964] ? __virt_addr_valid+0x102/0x340 [ 34.898522] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.899154] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.899768] kasan_report+0xbe/0xf0 [ 34.900249] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.900870] vma_interval_tree_remove+0xc75/0xec0 [ 34.901516] vma_prepare+0xc54/0x11a0 [ 34.902011] __split_vma+0x5af/0x950 [ 34.902512] ? __pfx___split_vma+0x10/0x10 [ 34.903067] ? find_held_lock+0x2c/0x110 [ 34.903615] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.904206] ? lock_is_held_type+0x9f/0x120 [ 34.904763] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.905404] ? mtree_range_walk+0x632/0x900 [ 34.905985] ? mas_walk+0x5c7/0x7c0 [ 34.906486] do_vmi_munmap+0x1f1/0x2b0 [ 34.906994] mmap_region+0x1f9/0x2660 [ 34.907508] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.908052] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.908803] ? __pfx_lock_acquire+0x10/0x10 [ 34.909370] ? __pfx_mmap_region+0x10/0x10 [ 34.909923] ? security_mmap_addr+0x7d/0xa0 [ 34.910479] ? get_unmapped_area+0x1f5/0x3f0 [ 34.911061] do_mmap+0x854/0xf00 [ 34.911523] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.912041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.912633] ksys_mmap_pgoff+0x3af/0x500 [ 34.913168] do_syscall_64+0x3f/0x90 [ 34.913661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.914336] RIP: 0033:0x7f87c604ad82 [ 34.914816] 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 [ 34.917083] RSP: 002b:00007ffc0b185a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.918025] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87c604ad82 [ 34.918918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87c5484000 [ 34.919794] RBP: 00007f87c5484000 R08: 0000000000000009 R09: 0000000000001000 [ 34.920684] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acf7698ec0 [ 34.921579] R13: 00007ffc0b185ab0 R14: 00007ffc0b185ae0 R15: 00007ffc0b185e40 [ 34.922485] [ 34.922787] [ 34.923007] Allocated by task 213: [ 34.923455] kasan_save_stack+0x22/0x50 [ 34.923977] kasan_set_track+0x25/0x30 [ 34.924490] __kasan_slab_alloc+0x59/0x70 [ 34.925054] kmem_cache_alloc+0x16b/0x370 [ 34.925598] vm_area_dup+0x20/0x160 [ 34.926068] __split_vma+0x170/0x950 [ 34.926569] split_vma+0xc6/0x110 [ 34.927027] mprotect_fixup+0x8d2/0xb30 [ 34.927556] do_mprotect_pkey+0x87e/0xd40 [ 34.928111] __x64_sys_mprotect+0x78/0xc0 [ 34.928658] do_syscall_64+0x3f/0x90 [ 34.929163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.929855] [ 34.930081] Freed by task 213: [ 34.930505] kasan_save_stack+0x22/0x50 [ 34.931037] kasan_set_track+0x25/0x30 [ 34.931565] kasan_save_free_info+0x2b/0x50 [ 34.932141] __kasan_slab_free+0x10a/0x190 [ 34.932717] kmem_cache_free+0x10d/0x4d0 [ 34.933263] rcu_core+0x8c8/0x2860 [ 34.933740] __do_softirq+0x1b7/0x7d4 [ 34.934247] [ 34.934474] Last potentially related work creation: [ 34.935102] kasan_save_stack+0x22/0x50 [ 34.935627] __kasan_record_aux_stack+0x8e/0xa0 [ 34.936229] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.936917] remove_vma+0x139/0x170 [ 34.937403] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.938002] do_vmi_munmap+0x1f1/0x2b0 [ 34.938522] __vm_munmap+0x138/0x3a0 [ 34.939011] __x64_sys_munmap+0x59/0x80 [ 34.939537] do_syscall_64+0x3f/0x90 [ 34.940043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.940720] [ 34.940947] The buggy address belongs to the object at ffff88801959fbc8 [ 34.940947] which belongs to the cache vm_area_struct of size 168 [ 34.942535] The buggy address is located 88 bytes inside of [ 34.942535] freed 168-byte region [ffff88801959fbc8, ffff88801959fc70) [ 34.944053] [ 34.944280] The buggy address belongs to the physical page: [ 34.944985] page:00000000db5ddb4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1959f [ 34.946179] memcg:ffff8880180d1701 [ 34.946631] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.947328] page_type: 0xffffffff() [ 34.947812] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.948802] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880180d1701 [ 34.949786] page dumped because: kasan: bad access detected [ 34.950493] [ 34.950718] Memory state around the buggy address: [ 34.951338] ffff88801959fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.952260] ffff88801959fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.953184] >ffff88801959fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.954103] ^ [ 34.954664] ffff88801959fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.955588] ffff88801959fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.956506] ================================================================== [ 34.957675] Disabling lock debugging due to kernel taint [ 36.814171] BUG: Bad rss-counter state mm:00000000e24145bd type:MM_FILEPAGES val:33 [ 36.814937] BUG: Bad rss-counter state mm:00000000e24145bd type:MM_ANONPAGES val:22 [ 37.207232] BUG: Bad rss-counter state mm:00000000e47a2314 type:MM_FILEPAGES val:33 [ 37.207893] BUG: Bad rss-counter state mm:00000000e47a2314 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45592' (ECDSA) to the list of known hosts. 2023/06/19 18:32:36 fuzzer started 2023/06/19 18:32:36 dialing manager at localhost:44161 2023/06/19 18:32:37 checking machine... 2023/06/19 18:32:37 checking revisions... [ 37.914554] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:32:37 testing simple program... [ 37.961087] cgroup: Unknown subsys name 'net' [ 38.009840] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:32:32 Registers: info registers vcpu 0 RAX=1ffff1100375925f RBX=ffff88801bac92c8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801bac92f8 RBP=ffff888013edad38 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888013edad38 R14=ffffffff813782a8 R15=ffff88800d958c00 RIP=ffffffff8184636c RFL=00000046 [---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 00007f302d480900 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=00007f302d440008 CR3=000000000d7c6000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f86069b9720 CR3=000000000e1f4000 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=2036333a32333a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a32333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000