syzkaller login: [ 30.703243] BUG: Bad rss-counter state mm:00000000488a2559 type:MM_FILEPAGES val:33 [ 30.704392] BUG: Bad rss-counter state mm:00000000488a2559 type:MM_ANONPAGES val:22 [ 30.739657] ================================================================== [ 30.740530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.741447] Read of size 8 at addr ffff88800f16b5c8 by task sshd/220 [ 30.742189] [ 30.742401] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.743281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.744235] Call Trace: [ 30.744549] [ 30.744828] dump_stack_lvl+0x91/0xf0 [ 30.745308] print_report+0xcc/0x620 [ 30.745784] ? __virt_addr_valid+0x102/0x340 [ 30.746375] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747007] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.747614] kasan_report+0xbe/0xf0 [ 30.748084] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.748682] vma_interval_tree_remove+0xc75/0xec0 [ 30.749267] vma_prepare+0xc54/0x11a0 [ 30.749734] __split_vma+0x5af/0x950 [ 30.750197] ? __pfx___split_vma+0x10/0x10 [ 30.750715] ? find_held_lock+0x2c/0x110 [ 30.751238] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.751787] ? lock_is_held_type+0x9f/0x120 [ 30.752312] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.752902] ? mtree_range_walk+0x632/0x900 [ 30.753440] ? mas_walk+0x5c7/0x7c0 [ 30.753902] do_vmi_munmap+0x1f1/0x2b0 [ 30.754383] mmap_region+0x1f9/0x2660 [ 30.754877] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.755372] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.756058] ? __pfx_lock_acquire+0x10/0x10 [ 30.756572] ? __pfx_mmap_region+0x10/0x10 [ 30.757082] ? security_mmap_addr+0x7d/0xa0 [ 30.757594] ? get_unmapped_area+0x1f5/0x3f0 [ 30.758123] do_mmap+0x854/0xf00 [ 30.758549] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.759049] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.759590] ksys_mmap_pgoff+0x3af/0x500 [ 30.760081] do_syscall_64+0x3f/0x90 [ 30.760545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.761173] RIP: 0033:0x7f38bf401d82 [ 30.761613] 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 [ 30.763693] RSP: 002b:00007ffd839e1728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.764565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38bf401d82 [ 30.765378] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38be83b000 [ 30.766194] RBP: 00007f38be83b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.767044] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a03fb77ec0 [ 30.767868] R13: 00007ffd839e1740 R14: 00007ffd839e1770 R15: 00007ffd839e1ad0 [ 30.768693] [ 30.768973] [ 30.769181] Allocated by task 213: [ 30.769593] kasan_save_stack+0x22/0x50 [ 30.770079] kasan_set_track+0x25/0x30 [ 30.770553] __kasan_slab_alloc+0x59/0x70 [ 30.771076] kmem_cache_alloc+0x16b/0x370 [ 30.771575] vm_area_dup+0x20/0x160 [ 30.772010] __split_vma+0x170/0x950 [ 30.772456] split_vma+0xc6/0x110 [ 30.772879] mprotect_fixup+0x8d2/0xb30 [ 30.773360] do_mprotect_pkey+0x87e/0xd40 [ 30.773860] __x64_sys_mprotect+0x78/0xc0 [ 30.774360] do_syscall_64+0x3f/0x90 [ 30.774817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775462] [ 30.775673] Freed by task 213: [ 30.776103] kasan_save_stack+0x22/0x50 [ 30.776592] kasan_set_track+0x25/0x30 [ 30.777068] kasan_save_free_info+0x2b/0x50 [ 30.777580] __kasan_slab_free+0x10a/0x190 [ 30.778096] kmem_cache_free+0x10d/0x4d0 [ 30.778586] rcu_core+0x8c8/0x2860 [ 30.779040] __do_softirq+0x1b7/0x7d4 [ 30.779503] [ 30.779714] Last potentially related work creation: [ 30.780401] kasan_save_stack+0x22/0x50 [ 30.780902] __kasan_record_aux_stack+0x8e/0xa0 [ 30.781468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.782102] remove_vma+0x139/0x170 [ 30.782548] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783124] do_vmi_munmap+0x1f1/0x2b0 [ 30.783606] __vm_munmap+0x138/0x3a0 [ 30.784068] __x64_sys_munmap+0x59/0x80 [ 30.784561] do_syscall_64+0x3f/0x90 [ 30.785031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.785670] [ 30.785883] The buggy address belongs to the object at ffff88800f16b570 [ 30.785883] which belongs to the cache vm_area_struct of size 168 [ 30.787377] The buggy address is located 88 bytes inside of [ 30.787377] freed 168-byte region [ffff88800f16b570, ffff88800f16b618) [ 30.788776] [ 30.788988] The buggy address belongs to the physical page: [ 30.789640] page:00000000c3b17a1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf16b [ 30.790712] memcg:ffff88800d5fcd01 [ 30.791156] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.791799] page_type: 0xffffffff() [ 30.792249] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.793158] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5fcd01 [ 30.794050] page dumped because: kasan: bad access detected [ 30.794704] [ 30.794976] Memory state around the buggy address: [ 30.795554] ffff88800f16b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.796408] ffff88800f16b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.797248] >ffff88800f16b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.798090] ^ [ 30.798750] ffff88800f16b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.799626] ffff88800f16b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.800470] ================================================================== [ 30.801549] Disabling lock debugging due to kernel taint [ 32.540293] BUG: Bad rss-counter state mm:00000000357227a4 type:MM_FILEPAGES val:33 [ 32.541407] BUG: Bad rss-counter state mm:00000000357227a4 type:MM_ANONPAGES val:22 [ 32.919721] BUG: Bad rss-counter state mm:000000009911914b type:MM_FILEPAGES val:33 [ 32.920387] BUG: Bad rss-counter state mm:000000009911914b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18788' (ECDSA) to the list of known hosts. 2023/06/20 12:42:53 fuzzer started 2023/06/20 12:42:53 dialing manager at localhost:36067 2023/06/20 12:42:53 checking machine... 2023/06/20 12:42:53 checking revisions... [ 33.624756] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:42:53 testing simple program... [ 33.677690] cgroup: Unknown subsys name 'net' [ 33.717489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:42:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f23fa9af000 RCX=0000000000000000 RDX=ffff88800fbc8000 RSI=ffffffff813a0b26 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88801ab0f658 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fbc8000 R15=0000000000000024 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f23fa4bc900 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=00007fff6488e000 CR3=000000000f302000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f1552efc030 CR3=000000000c6ea000 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=aa3cd8e439abc3b8b54d0712d21cf502 XMM02=2c67c8bc2e329bc3000000000011aff0 XMM03=fb795ef6d65770560000000000121990 XMM04=d7959f47280d9df900000000000ae988 XMM05=59d5b690e0af863b00000000001317c8 XMM06=4c54416d9c407b9b0000000000130630 XMM07=e042d86d42eb936e0000000000121c10 XMM08=177d69e3d9ea0639000000000011b050 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000