syzkaller login: [ 23.761024] BUG: Bad rss-counter state mm:00000000ea304cd8 type:MM_FILEPAGES val:33 [ 23.762674] BUG: Bad rss-counter state mm:00000000ea304cd8 type:MM_ANONPAGES val:22 [ 23.932440] ================================================================== [ 23.933427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.934399] Read of size 8 at addr ffff88800c99e4e0 by task sshd/219 [ 23.935289] [ 23.935514] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.936408] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.937566] Call Trace: [ 23.937968] [ 23.938313] dump_stack_lvl+0x91/0xf0 [ 23.938915] print_report+0xcc/0x620 [ 23.939492] ? __virt_addr_valid+0x102/0x340 [ 23.940159] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.940898] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.941647] kasan_report+0xbe/0xf0 [ 23.942238] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.943010] vma_interval_tree_remove+0xc75/0xec0 [ 23.943761] vma_prepare+0xc54/0x11a0 [ 23.944359] __split_vma+0x5af/0x950 [ 23.944945] ? __pfx___split_vma+0x10/0x10 [ 23.945602] ? find_held_lock+0x2c/0x110 [ 23.946193] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.946767] ? lock_is_held_type+0x9f/0x120 [ 23.947309] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.947921] ? mtree_range_walk+0x632/0x900 [ 23.948472] ? mas_walk+0x5c7/0x7c0 [ 23.948948] do_vmi_munmap+0x1f1/0x2b0 [ 23.949439] mmap_region+0x1f9/0x2660 [ 23.949931] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.950445] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.951162] ? __pfx_lock_acquire+0x10/0x10 [ 23.951692] ? __pfx_mmap_region+0x10/0x10 [ 23.952231] ? security_mmap_addr+0x7d/0xa0 [ 23.952768] ? get_unmapped_area+0x1f5/0x3f0 [ 23.953321] do_mmap+0x854/0xf00 [ 23.953775] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.954273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.954833] ksys_mmap_pgoff+0x3af/0x500 [ 23.955345] do_syscall_64+0x3f/0x90 [ 23.955823] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.956481] RIP: 0033:0x7fa627da8d82 [ 23.956946] 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 [ 23.959098] RSP: 002b:00007ffe1b543be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.960002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa627da8d82 [ 23.960844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6271e2000 [ 23.961700] RBP: 00007fa6271e2000 R08: 0000000000000009 R09: 0000000000001000 [ 23.962540] R10: 0000000000000812 R11: 0000000000000206 R12: 000056049feafec0 [ 23.963386] R13: 00007ffe1b543c00 R14: 00007ffe1b543c30 R15: 00007ffe1b543f90 [ 23.964246] [ 23.964545] [ 23.964763] Allocated by task 212: [ 23.965195] kasan_save_stack+0x22/0x50 [ 23.965721] kasan_set_track+0x25/0x30 [ 23.966215] __kasan_slab_alloc+0x59/0x70 [ 23.966745] kmem_cache_alloc+0x16b/0x370 [ 23.967263] vm_area_dup+0x20/0x160 [ 23.967716] __split_vma+0x170/0x950 [ 23.968184] split_vma+0xc6/0x110 [ 23.968622] mprotect_fixup+0x8d2/0xb30 [ 23.969127] do_mprotect_pkey+0x87e/0xd40 [ 23.969654] __x64_sys_mprotect+0x78/0xc0 [ 23.970173] do_syscall_64+0x3f/0x90 [ 23.970651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.971290] [ 23.971512] Freed by task 212: [ 23.971904] kasan_save_stack+0x22/0x50 [ 23.972410] kasan_set_track+0x25/0x30 [ 23.972902] kasan_save_free_info+0x2b/0x50 [ 23.973436] __kasan_slab_free+0x10a/0x190 [ 23.973987] kmem_cache_free+0x10d/0x4d0 [ 23.974502] rcu_core+0x8c8/0x2860 [ 23.974945] __do_softirq+0x1b7/0x7d4 [ 23.975423] [ 23.975636] Last potentially related work creation: [ 23.976220] kasan_save_stack+0x22/0x50 [ 23.976727] __kasan_record_aux_stack+0x8e/0xa0 [ 23.977303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.977983] remove_vma+0x139/0x170 [ 23.978438] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.979004] do_vmi_munmap+0x1f1/0x2b0 [ 23.979496] __vm_munmap+0x138/0x3a0 [ 23.979966] __x64_sys_munmap+0x59/0x80 [ 23.980461] do_syscall_64+0x3f/0x90 [ 23.980936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.981581] [ 23.981820] Second to last potentially related work creation: [ 23.982503] kasan_save_stack+0x22/0x50 [ 23.983005] __kasan_record_aux_stack+0x8e/0xa0 [ 23.983577] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.984225] remove_vma+0x139/0x170 [ 23.984681] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.985246] do_vmi_munmap+0x1f1/0x2b0 [ 23.985743] mmap_region+0x1f9/0x2660 [ 23.986228] do_mmap+0x854/0xf00 [ 23.986664] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.987159] ksys_mmap_pgoff+0x3af/0x500 [ 23.987673] do_syscall_64+0x3f/0x90 [ 23.988158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.988811] [ 23.989026] The buggy address belongs to the object at ffff88800c99e488 [ 23.989026] which belongs to the cache vm_area_struct of size 168 [ 23.990507] The buggy address is located 88 bytes inside of [ 23.990507] freed 168-byte region [ffff88800c99e488, ffff88800c99e530) [ 23.991915] [ 23.992134] The buggy address belongs to the physical page: [ 23.992789] page:00000000a5490fc7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc99e [ 23.993890] memcg:ffff888009a79701 [ 23.994321] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.994979] page_type: 0xffffffff() [ 23.995433] raw: 0100000000000200 ffff8880087a0c80 ffffea000038c540 dead000000000008 [ 23.996355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a79701 [ 23.997261] page dumped because: kasan: bad access detected [ 23.997931] [ 23.998156] Memory state around the buggy address: [ 23.998738] ffff88800c99e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.999616] ffff88800c99e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.000486] >ffff88800c99e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.001337] ^ [ 24.002127] ffff88800c99e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.002986] ffff88800c99e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.003860] ================================================================== [ 24.004902] Disabling lock debugging due to kernel taint [ 25.979966] BUG: Bad rss-counter state mm:00000000408c48b0 type:MM_FILEPAGES val:33 [ 25.980943] BUG: Bad rss-counter state mm:00000000408c48b0 type:MM_ANONPAGES val:22 [ 26.474181] BUG: Bad rss-counter state mm:0000000053badb5b type:MM_FILEPAGES val:33 [ 26.475177] BUG: Bad rss-counter state mm:0000000053badb5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39249' (ECDSA) to the list of known hosts. 2023/06/21 05:02:40 fuzzer started 2023/06/21 05:02:41 dialing manager at localhost:36067 2023/06/21 05:02:41 checking machine... 2023/06/21 05:02:41 checking revisions... [ 27.248596] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:02:41 testing simple program... [ 27.295362] cgroup: Unknown subsys name 'net' [ 27.334053] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:02:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888018057510 RSP=ffff888018057448 R8 =ffffffff864b2030 R9 =ffff8880180574f8 R10=0000000000038001 R11=00000000000b5080 R12=ffff888018057518 R13=ffff888018057500 R14=ffff888018057f58 R15=ffff8880180574b8 RIP=ffffffff81131153 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 00007f27077bc700 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=00007ff44d9697b0 CR3=000000000ee56000 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=2030343a32303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a32303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86098092 RDX=1ffff110011c6f34 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008e379b0 RSP=ffff888008e37898 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e379b8 R13=ffff888008e379a0 R14=0000000000000005 R15=ffff888008e37958 RIP=ffffffff81130b54 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 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=00007ffc1bc76000 CR3=00000000165e2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000