syzkaller login: [ 28.746370] BUG: Bad rss-counter state mm:00000000fe795b50 type:MM_FILEPAGES val:33 [ 28.748389] BUG: Bad rss-counter state mm:00000000fe795b50 type:MM_ANONPAGES val:22 [ 28.960986] ================================================================== [ 28.961978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.963090] Read of size 8 at addr ffff88800f68bc20 by task sshd/222 [ 28.963912] [ 28.964147] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.965075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.966107] Call Trace: [ 28.966452] [ 28.966766] dump_stack_lvl+0x91/0xf0 [ 28.967287] print_report+0xcc/0x620 [ 28.967806] ? __virt_addr_valid+0x102/0x340 [ 28.968395] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.969044] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.969706] kasan_report+0xbe/0xf0 [ 28.970210] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.970885] vma_interval_tree_remove+0xc75/0xec0 [ 28.971535] vma_prepare+0xc54/0x11a0 [ 28.972051] __split_vma+0x5af/0x950 [ 28.972562] ? __pfx___split_vma+0x10/0x10 [ 28.973137] ? find_held_lock+0x2c/0x110 [ 28.973706] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.974323] ? lock_is_held_type+0x9f/0x120 [ 28.974922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.975582] ? mtree_range_walk+0x632/0x900 [ 28.976179] ? mas_walk+0x5c7/0x7c0 [ 28.976694] do_vmi_munmap+0x1f1/0x2b0 [ 28.977233] mmap_region+0x1f9/0x2660 [ 28.977755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.978310] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.979089] ? __pfx_lock_acquire+0x10/0x10 [ 28.979669] ? __pfx_mmap_region+0x10/0x10 [ 28.980236] ? security_mmap_addr+0x7d/0xa0 [ 28.980810] ? get_unmapped_area+0x1f5/0x3f0 [ 28.981414] do_mmap+0x854/0xf00 [ 28.981885] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.982428] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.983056] ksys_mmap_pgoff+0x3af/0x500 [ 28.983612] do_syscall_64+0x3f/0x90 [ 28.984130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.984825] RIP: 0033:0x7fa457f68d82 [ 28.985326] 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 [ 28.987620] RSP: 002b:00007ffe03bdd3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.988599] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa457f68d82 [ 28.989505] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4573a2000 [ 28.990426] RBP: 00007fa4573a2000 R08: 0000000000000009 R09: 0000000000001000 [ 28.991342] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a35174b20 [ 28.992262] R13: 00007ffe03bdd3c0 R14: 00007ffe03bdd3f0 R15: 00007ffe03bdd750 [ 28.993182] [ 28.993502] [ 28.993734] Allocated by task 212: [ 28.994193] kasan_save_stack+0x22/0x50 [ 28.994762] kasan_set_track+0x25/0x30 [ 28.995294] __kasan_slab_alloc+0x59/0x70 [ 28.995865] kmem_cache_alloc+0x16b/0x370 [ 28.996424] vm_area_dup+0x20/0x160 [ 28.996913] __split_vma+0x170/0x950 [ 28.997415] split_vma+0xc6/0x110 [ 28.997890] mprotect_fixup+0x8d2/0xb30 [ 28.998431] do_mprotect_pkey+0x87e/0xd40 [ 28.998995] __x64_sys_mprotect+0x78/0xc0 [ 28.999559] do_syscall_64+0x3f/0x90 [ 29.000068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.000760] [ 29.000991] Freed by task 212: [ 29.001417] kasan_save_stack+0x22/0x50 [ 29.001957] kasan_set_track+0x25/0x30 [ 29.002492] kasan_save_free_info+0x2b/0x50 [ 29.003081] __kasan_slab_free+0x10a/0x190 [ 29.003658] kmem_cache_free+0x10d/0x4d0 [ 29.004208] rcu_core+0x8c8/0x2860 [ 29.004698] __do_softirq+0x1b7/0x7d4 [ 29.005217] [ 29.005455] Last potentially related work creation: [ 29.006082] kasan_save_stack+0x22/0x50 [ 29.006634] __kasan_record_aux_stack+0x8e/0xa0 [ 29.007262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.007967] remove_vma+0x139/0x170 [ 29.008463] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.009058] do_vmi_munmap+0x1f1/0x2b0 [ 29.009586] __vm_munmap+0x138/0x3a0 [ 29.010092] __x64_sys_munmap+0x59/0x80 [ 29.010650] do_syscall_64+0x3f/0x90 [ 29.011164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.011862] [ 29.012090] Second to last potentially related work creation: [ 29.012827] kasan_save_stack+0x22/0x50 [ 29.013375] __kasan_record_aux_stack+0x8e/0xa0 [ 29.013999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.014704] remove_vma+0x139/0x170 [ 29.015194] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.015795] do_vmi_munmap+0x1f1/0x2b0 [ 29.016329] mmap_region+0x1f9/0x2660 [ 29.016845] do_mmap+0x854/0xf00 [ 29.017304] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.017834] ksys_mmap_pgoff+0x3af/0x500 [ 29.018375] do_syscall_64+0x3f/0x90 [ 29.018902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.019602] [ 29.019833] The buggy address belongs to the object at ffff88800f68bbc8 [ 29.019833] which belongs to the cache vm_area_struct of size 168 [ 29.021425] The buggy address is located 88 bytes inside of [ 29.021425] freed 168-byte region [ffff88800f68bbc8, ffff88800f68bc70) [ 29.022959] [ 29.023196] The buggy address belongs to the physical page: [ 29.023909] page:00000000d0932e0f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf68b [ 29.025084] memcg:ffff88800ce9af01 [ 29.025545] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.026299] page_type: 0xffffffff() [ 29.026797] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386f80 dead000000000005 [ 29.027803] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce9af01 [ 29.028792] page dumped because: kasan: bad access detected [ 29.029498] [ 29.029728] Memory state around the buggy address: [ 29.030346] ffff88800f68bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.031281] ffff88800f68bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.032196] >ffff88800f68bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.033117] ^ [ 29.033684] ffff88800f68bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.034613] ffff88800f68bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.035517] ================================================================== [ 29.036714] Disabling lock debugging due to kernel taint [ 31.140888] BUG: Bad rss-counter state mm:00000000e530f045 type:MM_FILEPAGES val:33 [ 31.142093] BUG: Bad rss-counter state mm:00000000e530f045 type:MM_ANONPAGES val:22 [ 31.522311] BUG: Bad rss-counter state mm:0000000046b8bbcf type:MM_FILEPAGES val:33 [ 31.523376] BUG: Bad rss-counter state mm:0000000046b8bbcf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22235' (ECDSA) to the list of known hosts. 2023/06/20 18:09:44 fuzzer started 2023/06/20 18:09:45 dialing manager at localhost:36067 2023/06/20 18:09:45 checking machine... 2023/06/20 18:09:45 checking revisions... [ 32.229759] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:09:45 testing simple program... [ 32.284010] cgroup: Unknown subsys name 'net' [ 32.339541] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:09:44 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f677097f7c0 CR3=000000000cd32000 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=2034343a39303a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a39303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801580fc50 RCX=0000000000000000 RDX=ffff88800d9b9b40 RSI=ffffffff81810e69 RDI=ffff88801580fc70 RBP=0000000000140dca RSP=ffff88801580fba0 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000000 R12=ffff88801580fc6c R13=ffff88801580fc58 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff817924c1 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 00007f84da3fd900 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=00007ffe1a291ddc CR3=0000000019246000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=d56414ea286731756c803bae174cd3d0 XMM04=03269419c01d338106bcf9209d36eb91 XMM05=00000000000000000000000000000000 XMM06=03261419281d317506803b201736d391 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000