syzkaller login: [ 30.724133] BUG: Bad rss-counter state mm:0000000077f6bd40 type:MM_FILEPAGES val:33 [ 30.725551] BUG: Bad rss-counter state mm:0000000077f6bd40 type:MM_ANONPAGES val:22 [ 30.881653] ================================================================== [ 30.882728] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.883885] Read of size 8 at addr ffff8880164d46b0 by task sshd/220 [ 30.884759] [ 30.884978] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.885840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.886833] Call Trace: [ 30.887169] [ 30.887458] dump_stack_lvl+0x91/0xf0 [ 30.887946] print_report+0xcc/0x620 [ 30.888430] ? __virt_addr_valid+0x102/0x340 [ 30.888977] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.889594] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.890206] kasan_report+0xbe/0xf0 [ 30.890682] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.891309] vma_interval_tree_remove+0xc75/0xec0 [ 30.891912] vma_prepare+0xc54/0x11a0 [ 30.892388] __split_vma+0x5af/0x950 [ 30.892860] ? __pfx___split_vma+0x10/0x10 [ 30.893388] ? find_held_lock+0x2c/0x110 [ 30.893910] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.894483] ? lock_is_held_type+0x9f/0x120 [ 30.895017] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.895647] ? mtree_range_walk+0x632/0x900 [ 30.896194] ? mas_walk+0x5c7/0x7c0 [ 30.896666] do_vmi_munmap+0x1f1/0x2b0 [ 30.897161] mmap_region+0x1f9/0x2660 [ 30.897642] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.898154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.898865] ? __pfx_lock_acquire+0x10/0x10 [ 30.899398] ? __pfx_mmap_region+0x10/0x10 [ 30.899925] ? security_mmap_addr+0x7d/0xa0 [ 30.900455] ? get_unmapped_area+0x1f5/0x3f0 [ 30.900999] do_mmap+0x854/0xf00 [ 30.901435] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.901926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.902484] ksys_mmap_pgoff+0x3af/0x500 [ 30.902990] do_syscall_64+0x3f/0x90 [ 30.903470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904113] RIP: 0033:0x7fe298769d82 [ 30.904567] 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 [ 30.906672] RSP: 002b:00007fffcd0e5418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.907598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe298769d82 [ 30.908442] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe297ba3000 [ 30.909295] RBP: 00007fe297ba3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.910141] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ad8cf4f60 [ 30.910980] R13: 00007fffcd0e5430 R14: 00007fffcd0e5460 R15: 00007fffcd0e57c0 [ 30.911845] [ 30.912138] [ 30.912350] Allocated by task 213: [ 30.912772] kasan_save_stack+0x22/0x50 [ 30.913276] kasan_set_track+0x25/0x30 [ 30.913764] __kasan_slab_alloc+0x59/0x70 [ 30.914284] kmem_cache_alloc+0x16b/0x370 [ 30.914803] vm_area_dup+0x20/0x160 [ 30.915267] __split_vma+0x170/0x950 [ 30.915731] split_vma+0xc6/0x110 [ 30.916171] mprotect_fixup+0x8d2/0xb30 [ 30.916675] do_mprotect_pkey+0x87e/0xd40 [ 30.917190] __x64_sys_mprotect+0x78/0xc0 [ 30.917708] do_syscall_64+0x3f/0x90 [ 30.918180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.918817] [ 30.919031] Freed by task 19: [ 30.919439] kasan_save_stack+0x22/0x50 [ 30.919939] kasan_set_track+0x25/0x30 [ 30.920438] kasan_save_free_info+0x2b/0x50 [ 30.920966] __kasan_slab_free+0x10a/0x190 [ 30.921494] kmem_cache_free+0x10d/0x4d0 [ 30.922000] rcu_core+0x8c8/0x2860 [ 30.922442] __do_softirq+0x1b7/0x7d4 [ 30.922921] [ 30.923146] Last potentially related work creation: [ 30.923727] kasan_save_stack+0x22/0x50 [ 30.924228] __kasan_record_aux_stack+0x8e/0xa0 [ 30.924792] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.925427] remove_vma+0x139/0x170 [ 30.925938] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.926490] do_vmi_munmap+0x1f1/0x2b0 [ 30.926972] __vm_munmap+0x138/0x3a0 [ 30.927470] __x64_sys_munmap+0x59/0x80 [ 30.927964] do_syscall_64+0x3f/0x90 [ 30.928441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.929085] [ 30.929299] The buggy address belongs to the object at ffff8880164d4658 [ 30.929299] which belongs to the cache vm_area_struct of size 168 [ 30.930760] The buggy address is located 88 bytes inside of [ 30.930760] freed 168-byte region [ffff8880164d4658, ffff8880164d4700) [ 30.932163] [ 30.932381] The buggy address belongs to the physical page: [ 30.933051] page:000000002c377e48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164d4 [ 30.934155] memcg:ffff88800c9fc701 [ 30.934585] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.935281] page_type: 0xffffffff() [ 30.935738] raw: 0100000000000200 ffff8880087a0c80 ffffea00003196c0 dead000000000005 [ 30.936655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9fc701 [ 30.937557] page dumped because: kasan: bad access detected [ 30.938216] [ 30.938433] Memory state around the buggy address: [ 30.939015] ffff8880164d4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.939881] ffff8880164d4600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.940732] >ffff8880164d4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.941595] ^ [ 30.942181] ffff8880164d4700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.943026] ffff8880164d4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.943882] ================================================================== [ 30.944789] Disabling lock debugging due to kernel taint [ 32.773427] BUG: Bad rss-counter state mm:00000000c9009c1a type:MM_FILEPAGES val:33 [ 32.774330] BUG: Bad rss-counter state mm:00000000c9009c1a type:MM_ANONPAGES val:22 [ 33.185444] BUG: Bad rss-counter state mm:00000000f3daa4e3 type:MM_FILEPAGES val:33 [ 33.187066] BUG: Bad rss-counter state mm:00000000f3daa4e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38190' (ECDSA) to the list of known hosts. 2023/06/21 06:18:50 fuzzer started 2023/06/21 06:18:50 dialing manager at localhost:36067 2023/06/21 06:18:50 checking machine... 2023/06/21 06:18:50 checking revisions... [ 33.931132] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:18:50 testing simple program... [ 33.980704] cgroup: Unknown subsys name 'net' [ 34.018203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:18:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801465f918 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88801465f858 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=63206e6f69737365 R12=ffff88801465f928 R13=0000000000000001 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff812d8e70 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 00007faf29570900 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=00007fb75fc63650 CR3=000000000c4e2000 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=43b7523659b6efa811453e6974f607a1 XMM02=0000000000120280eff9b2d0a8fce9cb XMM03=00000000001203502c67c8bc2e329bc3 XMM04=beb54b6f5e4270d900000000000ae988 XMM05=07af5248eae4dd8b0000000000134320 XMM06=19e9129bd510f23500000000001331b8 XMM07=fb795ef6d65770560000000000123348 XMM08=2c67c8bc2e329bc300000000001202f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffe7b4daf18 CR3=0000000005482000 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=00007f8aac14d5100000558ceb3ff790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000