syzkaller login: [ 31.775734] BUG: Bad rss-counter state mm:00000000c80f648f type:MM_FILEPAGES val:33 [ 31.777502] BUG: Bad rss-counter state mm:00000000c80f648f type:MM_ANONPAGES val:22 [ 31.945059] ================================================================== [ 31.946176] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.947210] Read of size 8 at addr ffff88800f5d23f8 by task sshd/220 [ 31.948082] [ 31.948299] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.949147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.950136] Call Trace: [ 31.950453] [ 31.950735] dump_stack_lvl+0x91/0xf0 [ 31.951228] print_report+0xcc/0x620 [ 31.951706] ? __virt_addr_valid+0x102/0x340 [ 31.952263] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.952894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.953503] kasan_report+0xbe/0xf0 [ 31.953988] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.954606] vma_interval_tree_remove+0xc75/0xec0 [ 31.955216] vma_prepare+0xc54/0x11a0 [ 31.955698] __split_vma+0x5af/0x950 [ 31.956173] ? __pfx___split_vma+0x10/0x10 [ 31.956692] ? find_held_lock+0x2c/0x110 [ 31.957206] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.957764] ? lock_is_held_type+0x9f/0x120 [ 31.958317] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.958921] ? mtree_range_walk+0x632/0x900 [ 31.959469] ? mas_walk+0x5c7/0x7c0 [ 31.959945] do_vmi_munmap+0x1f1/0x2b0 [ 31.960434] mmap_region+0x1f9/0x2660 [ 31.960914] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.961421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.962141] ? __pfx_lock_acquire+0x10/0x10 [ 31.962666] ? __pfx_mmap_region+0x10/0x10 [ 31.963196] ? security_mmap_addr+0x7d/0xa0 [ 31.963727] ? get_unmapped_area+0x1f5/0x3f0 [ 31.964283] do_mmap+0x854/0xf00 [ 31.964722] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.965214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.965769] ksys_mmap_pgoff+0x3af/0x500 [ 31.966282] do_syscall_64+0x3f/0x90 [ 31.966759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.967398] RIP: 0033:0x7f8e7f686d82 [ 31.967849] 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 [ 31.969974] RSP: 002b:00007ffe290383a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.970873] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e7f686d82 [ 31.971715] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e7eac0000 [ 31.972557] RBP: 00007f8e7eac0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.973394] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647426e1ec0 [ 31.974247] R13: 00007ffe290383c0 R14: 00007ffe290383f0 R15: 00007ffe29038750 [ 31.975095] [ 31.975393] [ 31.975610] Allocated by task 213: [ 31.976032] kasan_save_stack+0x22/0x50 [ 31.976534] kasan_set_track+0x25/0x30 [ 31.977020] __kasan_slab_alloc+0x59/0x70 [ 31.977533] kmem_cache_alloc+0x16b/0x370 [ 31.978068] vm_area_dup+0x20/0x160 [ 31.978515] __split_vma+0x170/0x950 [ 31.978976] split_vma+0xc6/0x110 [ 31.979412] mprotect_fixup+0x8d2/0xb30 [ 31.979918] do_mprotect_pkey+0x87e/0xd40 [ 31.980440] __x64_sys_mprotect+0x78/0xc0 [ 31.980961] do_syscall_64+0x3f/0x90 [ 31.981431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.982074] [ 31.982287] Freed by task 213: [ 31.982675] kasan_save_stack+0x22/0x50 [ 31.983172] kasan_set_track+0x25/0x30 [ 31.983658] kasan_save_free_info+0x2b/0x50 [ 31.984180] __kasan_slab_free+0x10a/0x190 [ 31.984704] kmem_cache_free+0x10d/0x4d0 [ 31.985212] rcu_core+0x8c8/0x2860 [ 31.985649] __do_softirq+0x1b7/0x7d4 [ 31.986144] [ 31.986358] Last potentially related work creation: [ 31.986937] kasan_save_stack+0x22/0x50 [ 31.987434] __kasan_record_aux_stack+0x8e/0xa0 [ 31.988004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.988637] remove_vma+0x139/0x170 [ 31.989087] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.989636] do_vmi_munmap+0x1f1/0x2b0 [ 31.990133] __vm_munmap+0x138/0x3a0 [ 31.990594] __x64_sys_munmap+0x59/0x80 [ 31.991121] do_syscall_64+0x3f/0x90 [ 31.991661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.992384] [ 31.992628] The buggy address belongs to the object at ffff88800f5d23a0 [ 31.992628] which belongs to the cache vm_area_struct of size 168 [ 31.994301] The buggy address is located 88 bytes inside of [ 31.994301] freed 168-byte region [ffff88800f5d23a0, ffff88800f5d2448) [ 31.995877] [ 31.996123] The buggy address belongs to the physical page: [ 31.996872] page:00000000ea29ff92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5d2 [ 31.998099] memcg:ffff88800cfa0f01 [ 31.998586] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.999324] page_type: 0xffffffff() [ 31.999833] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.000869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfa0f01 [ 32.001894] page dumped because: kasan: bad access detected [ 32.002665] [ 32.002912] Memory state around the buggy address: [ 32.003571] ffff88800f5d2280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.004539] ffff88800f5d2300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.005507] >ffff88800f5d2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.006477] ^ [ 32.007436] ffff88800f5d2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.008413] ffff88800f5d2480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.009384] ================================================================== [ 32.010500] Disabling lock debugging due to kernel taint [ 33.719477] BUG: Bad rss-counter state mm:000000007aad6a5a type:MM_FILEPAGES val:33 [ 33.720252] BUG: Bad rss-counter state mm:000000007aad6a5a type:MM_ANONPAGES val:22 [ 34.101213] BUG: Bad rss-counter state mm:00000000df5bccad type:MM_FILEPAGES val:33 [ 34.102590] BUG: Bad rss-counter state mm:00000000df5bccad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62826' (ECDSA) to the list of known hosts. 2023/06/20 05:31:53 fuzzer started 2023/06/20 05:31:54 dialing manager at localhost:44161 2023/06/20 05:31:54 checking machine... 2023/06/20 05:31:54 checking revisions... [ 34.765750] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:31:54 testing simple program... [ 34.797914] cgroup: Unknown subsys name 'net' [ 34.841839] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:31:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed100206ddce RSP=ffff88801036ee60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=0000000000092800 RIP=ffffffff812d8a03 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 00007f5b894f1900 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=00007f5b894d0020 CR3=000000001476c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f58205433b0 CR3=0000000008de8000 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=65c27113391514ba3c48ff1587ed5300 XMM02=2c67c8bc2e329bc300000000001202b8 XMM03=fb795ef6d65770560000000000124a58 XMM04=8087f4b09219509d00000000000ae988 XMM05=19e9129bd510f2350000000000134568 XMM06=ad6e1cb2db536a3300000000001333d0 XMM07=e042d86d42eb936e0000000000124cd8 XMM08=b8f6dbc1bebb85980000000000120318 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000