syzkaller login: [ 30.793829] BUG: Bad rss-counter state mm:00000000f306f727 type:MM_FILEPAGES val:33 [ 30.794832] BUG: Bad rss-counter state mm:00000000f306f727 type:MM_ANONPAGES val:22 [ 30.960178] ================================================================== [ 30.961248] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.962363] Read of size 8 at addr ffff88800fb2bc20 by task sshd/221 [ 30.963406] [ 30.963626] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.964489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.965484] Call Trace: [ 30.965804] [ 30.966089] dump_stack_lvl+0x91/0xf0 [ 30.966592] print_report+0xcc/0x620 [ 30.967083] ? __virt_addr_valid+0x102/0x340 [ 30.967641] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.968255] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.968872] kasan_report+0xbe/0xf0 [ 30.969355] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.969980] vma_interval_tree_remove+0xc75/0xec0 [ 30.970585] vma_prepare+0xc54/0x11a0 [ 30.971083] __split_vma+0x5af/0x950 [ 30.971558] ? __pfx___split_vma+0x10/0x10 [ 30.972088] ? find_held_lock+0x2c/0x110 [ 30.972613] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.973177] ? lock_is_held_type+0x9f/0x120 [ 30.973716] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.974325] ? mtree_range_walk+0x632/0x900 [ 30.974878] ? mas_walk+0x5c7/0x7c0 [ 30.975368] do_vmi_munmap+0x1f1/0x2b0 [ 30.975863] mmap_region+0x1f9/0x2660 [ 30.976353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.976864] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.977574] ? __pfx_lock_acquire+0x10/0x10 [ 30.978107] ? __pfx_mmap_region+0x10/0x10 [ 30.978640] ? security_mmap_addr+0x7d/0xa0 [ 30.979183] ? get_unmapped_area+0x1f5/0x3f0 [ 30.979761] do_mmap+0x854/0xf00 [ 30.980205] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.980703] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.981268] ksys_mmap_pgoff+0x3af/0x500 [ 30.981779] do_syscall_64+0x3f/0x90 [ 30.982260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.982908] RIP: 0033:0x7fde42f1ed82 [ 30.983404] 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 [ 30.985592] RSP: 002b:00007ffd623801a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.986503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fde42f1ed82 [ 30.987372] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fde42358000 [ 30.988235] RBP: 00007fde42358000 R08: 0000000000000009 R09: 0000000000001000 [ 30.989093] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2a778dec0 [ 30.989944] R13: 00007ffd623801c0 R14: 00007ffd623801f0 R15: 00007ffd62380550 [ 30.990809] [ 30.991111] [ 30.991329] Allocated by task 214: [ 30.991767] kasan_save_stack+0x22/0x50 [ 30.992273] kasan_set_track+0x25/0x30 [ 30.992778] __kasan_slab_alloc+0x59/0x70 [ 30.993305] kmem_cache_alloc+0x16b/0x370 [ 30.993827] vm_area_dup+0x20/0x160 [ 30.994279] __split_vma+0x170/0x950 [ 30.994750] split_vma+0xc6/0x110 [ 30.995227] mprotect_fixup+0x8d2/0xb30 [ 30.995741] do_mprotect_pkey+0x87e/0xd40 [ 30.996264] __x64_sys_mprotect+0x78/0xc0 [ 30.996796] do_syscall_64+0x3f/0x90 [ 30.997274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.997923] [ 30.998139] Freed by task 19: [ 30.998522] kasan_save_stack+0x22/0x50 [ 30.999038] kasan_set_track+0x25/0x30 [ 30.999537] kasan_save_free_info+0x2b/0x50 [ 31.000083] __kasan_slab_free+0x10a/0x190 [ 31.000617] kmem_cache_free+0x10d/0x4d0 [ 31.001127] rcu_core+0x8c8/0x2860 [ 31.001573] __do_softirq+0x1b7/0x7d4 [ 31.002055] [ 31.002273] Last potentially related work creation: [ 31.002859] kasan_save_stack+0x22/0x50 [ 31.003373] __kasan_record_aux_stack+0x8e/0xa0 [ 31.003956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.004672] remove_vma+0x139/0x170 [ 31.005126] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.005695] do_vmi_munmap+0x1f1/0x2b0 [ 31.006183] __vm_munmap+0x138/0x3a0 [ 31.006648] __x64_sys_munmap+0x59/0x80 [ 31.007153] do_syscall_64+0x3f/0x90 [ 31.007633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.008281] [ 31.008504] The buggy address belongs to the object at ffff88800fb2bbc8 [ 31.008504] which belongs to the cache vm_area_struct of size 168 [ 31.009973] The buggy address is located 88 bytes inside of [ 31.009973] freed 168-byte region [ffff88800fb2bbc8, ffff88800fb2bc70) [ 31.011391] [ 31.011611] The buggy address belongs to the physical page: [ 31.012271] page:0000000070001a0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb2b [ 31.013381] memcg:ffff88800f324001 [ 31.013818] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.014466] page_type: 0xffffffff() [ 31.014923] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.015865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f324001 [ 31.016776] page dumped because: kasan: bad access detected [ 31.017448] [ 31.017669] Memory state around the buggy address: [ 31.018258] ffff88800fb2bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.019124] ffff88800fb2bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.020024] >ffff88800fb2bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.020885] ^ [ 31.021429] ffff88800fb2bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.022286] ffff88800fb2bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.023142] ================================================================== [ 31.024052] Disabling lock debugging due to kernel taint [ 33.852591] BUG: Bad rss-counter state mm:00000000bd5ae7a0 type:MM_FILEPAGES val:33 [ 33.853783] BUG: Bad rss-counter state mm:00000000bd5ae7a0 type:MM_ANONPAGES val:22 [ 34.300898] BUG: Bad rss-counter state mm:00000000b07f370a type:MM_FILEPAGES val:33 [ 34.302059] BUG: Bad rss-counter state mm:00000000b07f370a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42418' (ECDSA) to the list of known hosts. 2023/06/20 16:19:38 fuzzer started 2023/06/20 16:19:38 dialing manager at localhost:36067 2023/06/20 16:19:38 checking machine... 2023/06/20 16:19:38 checking revisions... [ 35.102829] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:19:38 testing simple program... [ 35.157210] cgroup: Unknown subsys name 'net' [ 35.211057] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:19:38 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff8215c967 RDX=ffff888016f79b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000053 RSP=ffff8880159b79b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000053 R13=ffff88800c66e000 R14=0000000000000053 R15=ffff8880159b7d90 RIP=ffffffff814c0261 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 00007efe5b12b900 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=00007efe5b6e0650 CR3=000000000fd7c000 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=ffff7fffffffffff RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e1399 RSP=ffff88806cf09c98 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff81828d41 R14=ffff888008cd4c10 R15=0000000000000001 RIP=ffffffff8180f079 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3f4931c700 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=00007fbe9478a000 CR3=000000000d196000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732037333a3931 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303134 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000