syzkaller login: [ 31.875538] BUG: Bad rss-counter state mm:0000000002ebb0ab type:MM_FILEPAGES val:33 [ 31.876771] BUG: Bad rss-counter state mm:0000000002ebb0ab type:MM_ANONPAGES val:22 [ 31.916809] ================================================================== [ 31.918087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.919156] Read of size 8 at addr ffff888019e12df0 by task sshd/220 [ 31.919931] [ 31.920152] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.921006] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.922005] Call Trace: [ 31.922349] [ 31.922681] dump_stack_lvl+0x91/0xf0 [ 31.923249] print_report+0xcc/0x620 [ 31.923750] ? __virt_addr_valid+0x102/0x340 [ 31.924300] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.924923] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.925582] kasan_report+0xbe/0xf0 [ 31.926059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.926684] vma_interval_tree_remove+0xc75/0xec0 [ 31.927302] vma_prepare+0xc54/0x11a0 [ 31.927777] __split_vma+0x5af/0x950 [ 31.928247] ? __pfx___split_vma+0x10/0x10 [ 31.928775] ? find_held_lock+0x2c/0x110 [ 31.929293] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.929867] ? lock_is_held_type+0x9f/0x120 [ 31.930402] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.931003] ? mtree_range_walk+0x632/0x900 [ 31.931553] ? mas_walk+0x5c7/0x7c0 [ 31.932024] do_vmi_munmap+0x1f1/0x2b0 [ 31.932520] mmap_region+0x1f9/0x2660 [ 31.933000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.933536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.934251] ? __pfx_lock_acquire+0x10/0x10 [ 31.934785] ? __pfx_mmap_region+0x10/0x10 [ 31.935318] ? security_mmap_addr+0x7d/0xa0 [ 31.935847] ? get_unmapped_area+0x1f5/0x3f0 [ 31.936397] do_mmap+0x854/0xf00 [ 31.936831] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.937329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.937894] ksys_mmap_pgoff+0x3af/0x500 [ 31.938402] do_syscall_64+0x3f/0x90 [ 31.938881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.939522] RIP: 0033:0x7ff38e3efd82 [ 31.939975] 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 [ 31.942089] RSP: 002b:00007ffc49cb3398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.942995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff38e3efd82 [ 31.943835] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff38d829000 [ 31.944677] RBP: 00007ff38d829000 R08: 0000000000000009 R09: 0000000000001000 [ 31.945527] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a380214f60 [ 31.946357] R13: 00007ffc49cb33b0 R14: 00007ffc49cb33e0 R15: 00007ffc49cb3740 [ 31.947199] [ 31.947499] [ 31.947714] Allocated by task 213: [ 31.948138] kasan_save_stack+0x22/0x50 [ 31.948644] kasan_set_track+0x25/0x30 [ 31.949131] __kasan_slab_alloc+0x59/0x70 [ 31.949662] kmem_cache_alloc+0x16b/0x370 [ 31.950176] vm_area_dup+0x20/0x160 [ 31.950637] __split_vma+0x170/0x950 [ 31.951106] split_vma+0xc6/0x110 [ 31.951549] mprotect_fixup+0x8d2/0xb30 [ 31.952046] do_mprotect_pkey+0x87e/0xd40 [ 31.952563] __x64_sys_mprotect+0x78/0xc0 [ 31.953081] do_syscall_64+0x3f/0x90 [ 31.953568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.954204] [ 31.954419] Freed by task 213: [ 31.954807] kasan_save_stack+0x22/0x50 [ 31.955308] kasan_set_track+0x25/0x30 [ 31.955797] kasan_save_free_info+0x2b/0x50 [ 31.956322] __kasan_slab_free+0x10a/0x190 [ 31.956855] kmem_cache_free+0x10d/0x4d0 [ 31.957361] rcu_core+0x8c8/0x2860 [ 31.957818] __do_softirq+0x1b7/0x7d4 [ 31.958297] [ 31.958512] Last potentially related work creation: [ 31.959099] kasan_save_stack+0x22/0x50 [ 31.959609] __kasan_record_aux_stack+0x8e/0xa0 [ 31.960184] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.960823] remove_vma+0x139/0x170 [ 31.961270] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.961834] do_vmi_munmap+0x1f1/0x2b0 [ 31.962317] __vm_munmap+0x138/0x3a0 [ 31.962778] __x64_sys_munmap+0x59/0x80 [ 31.963267] do_syscall_64+0x3f/0x90 [ 31.963738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.964372] [ 31.964587] The buggy address belongs to the object at ffff888019e12d98 [ 31.964587] which belongs to the cache vm_area_struct of size 168 [ 31.966049] The buggy address is located 88 bytes inside of [ 31.966049] freed 168-byte region [ffff888019e12d98, ffff888019e12e40) [ 31.967435] [ 31.967647] The buggy address belongs to the physical page: [ 31.968305] page:000000007d0a917c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e12 [ 31.969382] memcg:ffff88800e8d5901 [ 31.969836] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.970537] page_type: 0xffffffff() [ 31.970984] raw: 0100000000000200 ffff88800879fc80 ffffea000038ddc0 dead000000000005 [ 31.971885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8d5901 [ 31.972785] page dumped because: kasan: bad access detected [ 31.973461] [ 31.973678] Memory state around the buggy address: [ 31.974257] ffff888019e12c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.975103] ffff888019e12d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.975947] >ffff888019e12d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.976791] ^ [ 31.977602] ffff888019e12e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.978445] ffff888019e12e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.979292] ================================================================== [ 31.980401] Disabling lock debugging due to kernel taint [ 33.882456] BUG: Bad rss-counter state mm:00000000c9ed426f type:MM_FILEPAGES val:33 [ 33.883604] BUG: Bad rss-counter state mm:00000000c9ed426f type:MM_ANONPAGES val:22 [ 34.289212] BUG: Bad rss-counter state mm:000000005cf87f8c type:MM_FILEPAGES val:33 [ 34.290228] BUG: Bad rss-counter state mm:000000005cf87f8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60900' (ECDSA) to the list of known hosts. 2023/06/20 07:10:56 fuzzer started 2023/06/20 07:10:56 dialing manager at localhost:44161 2023/06/20 07:10:56 checking machine... 2023/06/20 07:10:56 checking revisions... [ 34.962525] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:10:56 testing simple program... [ 35.009961] cgroup: Unknown subsys name 'net' [ 35.040921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:10:55 Registers: info registers vcpu 0 RAX=ffffffff81807ebb RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001e1ce56 RSI=ffffffff81807ebb RDI=ffff88800f0e7320 RBP=ffff88800f0e72f0 RSP=ffff88800f0e7250 R8 =0000000000000001 R9 =ffff88800f0e7298 R10=0000000000038001 R11=0000000000020de7 R12=ffff88800f0e7320 R13=0000000000000000 R14=ffff8880165c51c0 R15=00000000000928c0 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007febb074f900 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=00007febb0d06618 CR3=000000001a32e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f8e7729a330 CR3=0000000009752000 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=5e7f7f5813d5a48bb54d633bc78fb9d1 XMM02=000000000011d068ec2efd57dc4c00df XMM03=00000000001245e0c0361ea026b86230 XMM04=8529c1c190b9761900000000000ae988 XMM05=19e9129bd510f2350000000000134190 XMM06=bd979ac8bef61ad70000000000132ff8 XMM07=e042d86d42eb936e0000000000124860 XMM08=c0361ea026b86230000000000011d0c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000