syzkaller login: [ 30.765141] BUG: Bad rss-counter state mm:00000000e1e91da0 type:MM_FILEPAGES val:33 [ 30.766179] BUG: Bad rss-counter state mm:00000000e1e91da0 type:MM_ANONPAGES val:22 [ 30.936854] ================================================================== [ 30.937863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.938884] Read of size 8 at addr ffff888019f6bed8 by task sshd/220 [ 30.939837] [ 30.940095] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.941068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.942177] Call Trace: [ 30.942531] [ 30.942856] dump_stack_lvl+0x91/0xf0 [ 30.943417] print_report+0xcc/0x620 [ 30.943951] ? __virt_addr_valid+0x102/0x340 [ 30.944566] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.945921] kasan_report+0xbe/0xf0 [ 30.946428] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947088] vma_interval_tree_remove+0xc75/0xec0 [ 30.947730] vma_prepare+0xc54/0x11a0 [ 30.948241] __split_vma+0x5af/0x950 [ 30.948747] ? __pfx___split_vma+0x10/0x10 [ 30.949314] ? find_held_lock+0x2c/0x110 [ 30.949878] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.950476] ? lock_is_held_type+0x9f/0x120 [ 30.951048] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.951694] ? mtree_range_walk+0x632/0x900 [ 30.952279] ? mas_walk+0x5c7/0x7c0 [ 30.952800] do_vmi_munmap+0x1f1/0x2b0 [ 30.953322] mmap_region+0x1f9/0x2660 [ 30.953833] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.954375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.955136] ? __pfx_lock_acquire+0x10/0x10 [ 30.955745] ? __pfx_mmap_region+0x10/0x10 [ 30.956310] ? security_mmap_addr+0x7d/0xa0 [ 30.956911] ? get_unmapped_area+0x1f5/0x3f0 [ 30.957514] do_mmap+0x854/0xf00 [ 30.957986] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.958511] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.959106] ksys_mmap_pgoff+0x3af/0x500 [ 30.959650] do_syscall_64+0x3f/0x90 [ 30.960164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.960872] RIP: 0033:0x7f35aaf4dd82 [ 30.961369] 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 [ 30.963642] RSP: 002b:00007fff6d550038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.964624] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35aaf4dd82 [ 30.965550] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35aa387000 [ 30.966469] RBP: 00007f35aa387000 R08: 0000000000000009 R09: 0000000000001000 [ 30.967364] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c66831ec0 [ 30.968261] R13: 00007fff6d550050 R14: 00007fff6d550080 R15: 00007fff6d5503e0 [ 30.969211] [ 30.969539] [ 30.969774] Allocated by task 213: [ 30.970235] kasan_save_stack+0x22/0x50 [ 30.970782] kasan_set_track+0x25/0x30 [ 30.971327] __kasan_slab_alloc+0x59/0x70 [ 30.971897] kmem_cache_alloc+0x16b/0x370 [ 30.972448] vm_area_dup+0x20/0x160 [ 30.972956] __split_vma+0x170/0x950 [ 30.973474] split_vma+0xc6/0x110 [ 30.973948] mprotect_fixup+0x8d2/0xb30 [ 30.974485] do_mprotect_pkey+0x87e/0xd40 [ 30.975055] __x64_sys_mprotect+0x78/0xc0 [ 30.975640] do_syscall_64+0x3f/0x90 [ 30.976152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976897] [ 30.977136] Freed by task 213: [ 30.977559] kasan_save_stack+0x22/0x50 [ 30.978100] kasan_set_track+0x25/0x30 [ 30.978625] kasan_save_free_info+0x2b/0x50 [ 30.979197] __kasan_slab_free+0x10a/0x190 [ 30.979766] kmem_cache_free+0x10d/0x4d0 [ 30.980312] rcu_core+0x8c8/0x2860 [ 30.980796] __do_softirq+0x1b7/0x7d4 [ 30.981383] [ 30.981626] Last potentially related work creation: [ 30.982269] kasan_save_stack+0x22/0x50 [ 30.982810] __kasan_record_aux_stack+0x8e/0xa0 [ 30.983459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.984157] remove_vma+0x139/0x170 [ 30.984696] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.985301] do_vmi_munmap+0x1f1/0x2b0 [ 30.985832] __vm_munmap+0x138/0x3a0 [ 30.986341] __x64_sys_munmap+0x59/0x80 [ 30.986889] do_syscall_64+0x3f/0x90 [ 30.987408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988112] [ 30.988349] The buggy address belongs to the object at ffff888019f6be80 [ 30.988349] which belongs to the cache vm_area_struct of size 168 [ 30.989977] The buggy address is located 88 bytes inside of [ 30.989977] freed 168-byte region [ffff888019f6be80, ffff888019f6bf28) [ 30.991524] [ 30.991760] The buggy address belongs to the physical page: [ 30.992487] page:00000000d37e79cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f6b [ 30.993705] memcg:ffff88801a39ad01 [ 30.994177] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.994888] page_type: 0xffffffff() [ 30.995381] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.996395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a39ad01 [ 30.997415] page dumped because: kasan: bad access detected [ 30.998148] [ 30.998385] Memory state around the buggy address: [ 30.999023] ffff888019f6bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.999969] ffff888019f6be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.000928] >ffff888019f6be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.001870] ^ [ 31.002674] ffff888019f6bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.003606] ffff888019f6bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.004473] ================================================================== [ 31.005567] Disabling lock debugging due to kernel taint [ 33.292698] BUG: Bad rss-counter state mm:0000000004942d20 type:MM_FILEPAGES val:33 [ 33.294242] BUG: Bad rss-counter state mm:0000000004942d20 type:MM_ANONPAGES val:22 [ 33.799760] BUG: Bad rss-counter state mm:0000000037b6fe5f type:MM_FILEPAGES val:33 [ 33.800860] BUG: Bad rss-counter state mm:0000000037b6fe5f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27719' (ECDSA) to the list of known hosts. 2023/06/21 05:07:26 fuzzer started 2023/06/21 05:07:26 dialing manager at localhost:36067 2023/06/21 05:07:27 checking machine... 2023/06/21 05:07:27 checking revisions... [ 34.597866] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:07:27 testing simple program... [ 34.653340] cgroup: Unknown subsys name 'net' [ 34.712205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:07:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d90000 RCX=0000000000000000 RDX=ffff888008d91198 RSI=000000000001013f RDI=ffff888008d91198 RBP=0000000000000000 RSP=ffff888008d9fb20 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=000000000001013f R12=0000000000000000 R13=ffffea0000404fc0 R14=000000000001013f R15=ffff88807ffdc500 RIP=ffffffff81789557 RFL=00000082 [--S----] 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 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=00007fd110885650 CR3=000000000e224000 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=2036323a37303a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a37303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880095c3680 RSI=ffffffff8164b7be RDI=0000000000000001 RBP=ffffea00005eefc0 RSP=ffff888015c87a70 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffff8880167c67e8 R13=ffffffff81b28f30 R14=0000000000800000 R15=000000000009e000 RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f02f82f1900 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=00007f02f77797e0 CR3=000000000cac0000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=162b9c554226b67c00000000000ae988 XMM05=0758dfd20db59cb800000000001330e8 XMM06=19e9129bd510f2350000000000131fa0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000