syzkaller login: [ 60.775968] BUG: Bad rss-counter state mm:00000000f0d178b8 type:MM_FILEPAGES val:33 [ 60.776774] BUG: Bad rss-counter state mm:00000000f0d178b8 type:MM_ANONPAGES val:22 [ 61.009936] ================================================================== [ 61.010973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.012049] Read of size 8 at addr ffff888018fb2798 by task sshd/222 [ 61.013050] [ 61.013303] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.014292] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.015419] Call Trace: [ 61.015779] [ 61.016107] dump_stack_lvl+0x91/0xf0 [ 61.016699] print_report+0xcc/0x620 [ 61.017261] ? __virt_addr_valid+0x102/0x340 [ 61.017901] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.018611] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.019316] kasan_report+0xbe/0xf0 [ 61.019880] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.020640] vma_interval_tree_remove+0xc75/0xec0 [ 61.021358] vma_prepare+0xc54/0x11a0 [ 61.021936] __split_vma+0x5af/0x950 [ 61.022514] ? __pfx___split_vma+0x10/0x10 [ 61.023158] ? find_held_lock+0x2c/0x110 [ 61.023775] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.024458] ? lock_is_held_type+0x9f/0x120 [ 61.025111] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.025827] ? mtree_range_walk+0x632/0x900 [ 61.026489] ? mas_walk+0x5c7/0x7c0 [ 61.027059] do_vmi_munmap+0x1f1/0x2b0 [ 61.027640] mmap_region+0x1f9/0x2660 [ 61.028212] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.028842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.029714] ? __pfx_lock_acquire+0x10/0x10 [ 61.030358] ? __pfx_mmap_region+0x10/0x10 [ 61.030990] ? security_mmap_addr+0x7d/0xa0 [ 61.031627] ? get_unmapped_area+0x1f5/0x3f0 [ 61.032280] do_mmap+0x854/0xf00 [ 61.032799] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.033379] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.034028] ksys_mmap_pgoff+0x3af/0x500 [ 61.034622] do_syscall_64+0x3f/0x90 [ 61.035197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.035968] RIP: 0033:0x7fcc2ca6fd82 [ 61.036524] 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 [ 61.038907] RSP: 002b:00007ffca5cee3b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.039965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc2ca6fd82 [ 61.040932] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc2bea9000 [ 61.041893] RBP: 00007fcc2bea9000 R08: 0000000000000009 R09: 0000000000001000 [ 61.042833] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c808e5c980 [ 61.043775] R13: 00007ffca5cee3d0 R14: 00007ffca5cee400 R15: 00007ffca5cee760 [ 61.044747] [ 61.045077] [ 61.045322] Allocated by task 213: [ 61.045812] kasan_save_stack+0x22/0x50 [ 61.046400] kasan_set_track+0x25/0x30 [ 61.046973] __kasan_slab_alloc+0x59/0x70 [ 61.047589] kmem_cache_alloc+0x16b/0x370 [ 61.048191] vm_area_dup+0x20/0x160 [ 61.048745] __split_vma+0x170/0x950 [ 61.049290] split_vma+0xc6/0x110 [ 61.049809] mprotect_fixup+0x8d2/0xb30 [ 61.050401] do_mprotect_pkey+0x87e/0xd40 [ 61.051010] __x64_sys_mprotect+0x78/0xc0 [ 61.051617] do_syscall_64+0x3f/0x90 [ 61.052176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.052938] [ 61.053191] Freed by task 104: [ 61.053654] kasan_save_stack+0x22/0x50 [ 61.054244] kasan_set_track+0x25/0x30 [ 61.054821] kasan_save_free_info+0x2b/0x50 [ 61.055441] __kasan_slab_free+0x10a/0x190 [ 61.056062] kmem_cache_free+0x10d/0x4d0 [ 61.056672] rcu_core+0x8c8/0x2860 [ 61.057192] __do_softirq+0x1b7/0x7d4 [ 61.057746] [ 61.057993] Last potentially related work creation: [ 61.058664] kasan_save_stack+0x22/0x50 [ 61.059241] __kasan_record_aux_stack+0x8e/0xa0 [ 61.059904] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.060649] remove_vma+0x139/0x170 [ 61.061178] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.061815] do_vmi_munmap+0x1f1/0x2b0 [ 61.062375] __vm_munmap+0x138/0x3a0 [ 61.062919] __x64_sys_munmap+0x59/0x80 [ 61.063498] do_syscall_64+0x3f/0x90 [ 61.064051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.064803] [ 61.065055] The buggy address belongs to the object at ffff888018fb2740 [ 61.065055] which belongs to the cache vm_area_struct of size 168 [ 61.066755] The buggy address is located 88 bytes inside of [ 61.066755] freed 168-byte region [ffff888018fb2740, ffff888018fb27e8) [ 61.068410] [ 61.068656] The buggy address belongs to the physical page: [ 61.069420] page:000000008f3ad562 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fb2 [ 61.070705] memcg:ffff888019cda801 [ 61.071200] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.071951] page_type: 0xffffffff() [ 61.072487] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.073554] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cda801 [ 61.074606] page dumped because: kasan: bad access detected [ 61.075376] [ 61.075624] Memory state around the buggy address: [ 61.076294] ffff888018fb2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.077316] ffff888018fb2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 61.078318] >ffff888018fb2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 61.079304] ^ [ 61.079871] ffff888018fb2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.080849] ffff888018fb2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.081823] ================================================================== [ 61.082954] Disabling lock debugging due to kernel taint [ 62.977680] BUG: Bad rss-counter state mm:000000005b13d98b type:MM_FILEPAGES val:33 [ 62.979078] BUG: Bad rss-counter state mm:000000005b13d98b type:MM_ANONPAGES val:22 [ 63.550126] BUG: Bad rss-counter state mm:000000005cc8c90a type:MM_FILEPAGES val:33 [ 63.551161] BUG: Bad rss-counter state mm:000000005cc8c90a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4519' (ECDSA) to the list of known hosts. 2023/06/21 07:21:53 fuzzer started 2023/06/21 07:21:53 dialing manager at localhost:36067 2023/06/21 07:21:53 checking machine... 2023/06/21 07:21:53 checking revisions... [ 64.242688] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:21:53 testing simple program... [ 64.283562] cgroup: Unknown subsys name 'net' [ 64.327461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:21:53 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff8604ebe8 RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff8880169375e0 R8 =ffffffff864b2008 R9 =ffff8880169376d8 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc8a RFL=00000206 [-----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 00007f18206df900 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=00007fff622dc000 CR3=000000000ea8a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fb5be183000 CR3=000000000ef7e000 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=3a87874907919dafa84987874e4074f2 XMM02=ec2efd57dc4c00df000000000011a670 XMM03=4d704037a25d5af8000000000011a740 XMM04=ba91a1d9c3236c6200000000000ae988 XMM05=6212555d6747c4310000000000132868 XMM06=4fda316b135da52b0000000000131908 XMM07=e042d86d42eb936e0000000000121ed8 XMM08=4d704037a25d5af8000000000011a740 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000