syzkaller login: [ 30.588920] BUG: Bad rss-counter state mm:000000005d445b13 type:MM_FILEPAGES val:33 [ 30.589921] BUG: Bad rss-counter state mm:000000005d445b13 type:MM_ANONPAGES val:22 [ 30.748735] ================================================================== [ 30.749663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.750586] Read of size 8 at addr ffff88800da50140 by task sshd/221 [ 30.751355] [ 30.751569] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.752551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.753528] Call Trace: [ 30.753866] [ 30.754154] dump_stack_lvl+0x91/0xf0 [ 30.754639] print_report+0xcc/0x620 [ 30.755134] ? __virt_addr_valid+0x102/0x340 [ 30.755685] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756338] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756974] kasan_report+0xbe/0xf0 [ 30.757454] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758094] vma_interval_tree_remove+0xc75/0xec0 [ 30.758694] vma_prepare+0xc54/0x11a0 [ 30.759189] __split_vma+0x5af/0x950 [ 30.759658] ? __pfx___split_vma+0x10/0x10 [ 30.760212] ? find_held_lock+0x2c/0x110 [ 30.760733] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.761305] ? lock_is_held_type+0x9f/0x120 [ 30.761841] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.762461] ? mtree_range_walk+0x632/0x900 [ 30.763027] ? mas_walk+0x5c7/0x7c0 [ 30.763499] do_vmi_munmap+0x1f1/0x2b0 [ 30.764014] mmap_region+0x1f9/0x2660 [ 30.764504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.765020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.765743] ? __pfx_lock_acquire+0x10/0x10 [ 30.766294] ? __pfx_mmap_region+0x10/0x10 [ 30.766823] ? security_mmap_addr+0x7d/0xa0 [ 30.767361] ? get_unmapped_area+0x1f5/0x3f0 [ 30.767908] do_mmap+0x854/0xf00 [ 30.768396] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.768883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.769449] ksys_mmap_pgoff+0x3af/0x500 [ 30.769964] do_syscall_64+0x3f/0x90 [ 30.770466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771113] RIP: 0033:0x7f8e84045d82 [ 30.771573] 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 [ 30.773733] RSP: 002b:00007ffd3e49d1a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.774650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e84045d82 [ 30.775500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e8347f000 [ 30.776375] RBP: 00007f8e8347f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.777220] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d41997ff60 [ 30.778071] R13: 00007ffd3e49d1c0 R14: 00007ffd3e49d1f0 R15: 00007ffd3e49d550 [ 30.778931] [ 30.779222] [ 30.779451] Allocated by task 214: [ 30.779878] kasan_save_stack+0x22/0x50 [ 30.780432] kasan_set_track+0x25/0x30 [ 30.780920] __kasan_slab_alloc+0x59/0x70 [ 30.781454] kmem_cache_alloc+0x16b/0x370 [ 30.781969] vm_area_dup+0x20/0x160 [ 30.782456] __split_vma+0x170/0x950 [ 30.782926] split_vma+0xc6/0x110 [ 30.783371] mprotect_fixup+0x8d2/0xb30 [ 30.783882] do_mprotect_pkey+0x87e/0xd40 [ 30.784424] __x64_sys_mprotect+0x78/0xc0 [ 30.784952] do_syscall_64+0x3f/0x90 [ 30.785433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786078] [ 30.786291] Freed by task 214: [ 30.786695] kasan_save_stack+0x22/0x50 [ 30.787192] kasan_set_track+0x25/0x30 [ 30.787690] kasan_save_free_info+0x2b/0x50 [ 30.788234] __kasan_slab_free+0x10a/0x190 [ 30.788776] kmem_cache_free+0x10d/0x4d0 [ 30.789280] rcu_core+0x8c8/0x2860 [ 30.789733] __do_softirq+0x1b7/0x7d4 [ 30.790207] [ 30.790420] Last potentially related work creation: [ 30.791018] kasan_save_stack+0x22/0x50 [ 30.791516] __kasan_record_aux_stack+0x8e/0xa0 [ 30.792112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.792773] remove_vma+0x139/0x170 [ 30.793222] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.793868] do_vmi_munmap+0x1f1/0x2b0 [ 30.794347] __vm_munmap+0x138/0x3a0 [ 30.794830] __x64_sys_munmap+0x59/0x80 [ 30.795327] do_syscall_64+0x3f/0x90 [ 30.795810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796468] [ 30.796683] The buggy address belongs to the object at ffff88800da500e8 [ 30.796683] which belongs to the cache vm_area_struct of size 168 [ 30.798163] The buggy address is located 88 bytes inside of [ 30.798163] freed 168-byte region [ffff88800da500e8, ffff88800da50190) [ 30.799589] [ 30.799814] The buggy address belongs to the physical page: [ 30.800496] page:0000000078712a81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda50 [ 30.801593] memcg:ffff88800d74b901 [ 30.802033] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.802723] page_type: 0xffffffff() [ 30.803186] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.804117] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d74b901 [ 30.805032] page dumped because: kasan: bad access detected [ 30.805688] [ 30.805900] Memory state around the buggy address: [ 30.806483] ffff88800da50000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.807348] ffff88800da50080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.808220] >ffff88800da50100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.809073] ^ [ 30.809707] ffff88800da50180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.810561] ffff88800da50200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.811425] ================================================================== [ 30.812362] Disabling lock debugging due to kernel taint [ 33.193996] BUG: Bad rss-counter state mm:000000004d1ce17b type:MM_FILEPAGES val:33 [ 33.195353] BUG: Bad rss-counter state mm:000000004d1ce17b type:MM_ANONPAGES val:22 [ 33.658338] BUG: Bad rss-counter state mm:0000000060ed9f82 type:MM_FILEPAGES val:33 [ 33.660004] BUG: Bad rss-counter state mm:0000000060ed9f82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25999' (ECDSA) to the list of known hosts. 2023/06/20 21:02:46 fuzzer started 2023/06/20 21:02:46 dialing manager at localhost:36067 2023/06/20 21:02:46 checking machine... 2023/06/20 21:02:46 checking revisions... [ 34.394062] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:02:46 testing simple program... [ 34.450022] cgroup: Unknown subsys name 'net' [ 34.502505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:02:46 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=00007f5ca2622870 CR3=000000001457e000 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=c206951f407c01aa114217758584b911 XMM02=0000000000119f50d59e07bde36eea69 XMM03=000000000011a078ec2efd57dc4c00df XMM04=1ab516355437e33e00000000000ae988 XMM05=271680b4ee1ddf910000000000132530 XMM06=c291bd5c70af25b90000000000131320 XMM07=fb795ef6d657705600000000001215b8 XMM08=2c67c8bc2e329bc3000000000011a078 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000002 RCX=ffffffff844b7df2 RDX=ffff8880146fb680 RSI=0000000000000000 RDI=0000000000000007 RBP=dffffc0000000000 RSP=ffff88800ff8fd68 R8 =0000000000000007 R9 =0000000000001000 R10=ffff88800f86821e R11=0000000000000000 R12=ffff88800f86821e R13=ffff88800ff8fe70 R14=ffffffffffffffff R15=1ffff11001ff1faf RIP=ffffffff814c0261 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 00007fc67f27b900 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=00007fc67fdcf044 CR3=0000000010302000 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=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=661c6e696d72652c20320d3223302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000