syzkaller login: [ 31.202804] BUG: Bad rss-counter state mm:00000000df7205b8 type:MM_FILEPAGES val:33 [ 31.203939] BUG: Bad rss-counter state mm:00000000df7205b8 type:MM_ANONPAGES val:22 [ 31.245301] ================================================================== [ 31.246342] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.247424] Read of size 8 at addr ffff88800c4f26b0 by task sshd/221 [ 31.248309] [ 31.248563] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.249558] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.250849] Call Trace: [ 31.251178] [ 31.251459] dump_stack_lvl+0x91/0xf0 [ 31.251945] print_report+0xcc/0x620 [ 31.252418] ? __virt_addr_valid+0x102/0x340 [ 31.252970] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.253583] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.254206] kasan_report+0xbe/0xf0 [ 31.254690] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255310] vma_interval_tree_remove+0xc75/0xec0 [ 31.255904] vma_prepare+0xc54/0x11a0 [ 31.256377] __split_vma+0x5af/0x950 [ 31.256847] ? __pfx___split_vma+0x10/0x10 [ 31.257370] ? find_held_lock+0x2c/0x110 [ 31.257890] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.258466] ? lock_is_held_type+0x9f/0x120 [ 31.259001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.259605] ? mtree_range_walk+0x632/0x900 [ 31.260158] ? mas_walk+0x5c7/0x7c0 [ 31.260628] do_vmi_munmap+0x1f1/0x2b0 [ 31.261127] mmap_region+0x1f9/0x2660 [ 31.261604] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.262131] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.262838] ? __pfx_lock_acquire+0x10/0x10 [ 31.263369] ? __pfx_mmap_region+0x10/0x10 [ 31.263894] ? security_mmap_addr+0x7d/0xa0 [ 31.264422] ? get_unmapped_area+0x1f5/0x3f0 [ 31.264965] do_mmap+0x854/0xf00 [ 31.265400] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.265894] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.266462] ksys_mmap_pgoff+0x3af/0x500 [ 31.266963] do_syscall_64+0x3f/0x90 [ 31.267451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.268099] RIP: 0033:0x7f8e02c8bd82 [ 31.268552] 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 [ 31.270695] RSP: 002b:00007ffd3e446c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.271596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e02c8bd82 [ 31.272435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e020c5000 [ 31.273280] RBP: 00007f8e020c5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.274128] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559adbc6ad90 [ 31.274970] R13: 00007ffd3e446c90 R14: 00007ffd3e446cc0 R15: 00007ffd3e447020 [ 31.275815] [ 31.276110] [ 31.276324] Allocated by task 214: [ 31.276747] kasan_save_stack+0x22/0x50 [ 31.277247] kasan_set_track+0x25/0x30 [ 31.277735] __kasan_slab_alloc+0x59/0x70 [ 31.278274] kmem_cache_alloc+0x16b/0x370 [ 31.278786] vm_area_dup+0x20/0x160 [ 31.279243] __split_vma+0x170/0x950 [ 31.279716] split_vma+0xc6/0x110 [ 31.280158] mprotect_fixup+0x8d2/0xb30 [ 31.280660] do_mprotect_pkey+0x87e/0xd40 [ 31.281173] __x64_sys_mprotect+0x78/0xc0 [ 31.281695] do_syscall_64+0x3f/0x90 [ 31.282175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.282816] [ 31.283030] Freed by task 214: [ 31.283418] kasan_save_stack+0x22/0x50 [ 31.283924] kasan_set_track+0x25/0x30 [ 31.284421] kasan_save_free_info+0x2b/0x50 [ 31.284951] __kasan_slab_free+0x10a/0x190 [ 31.285478] kmem_cache_free+0x10d/0x4d0 [ 31.285989] rcu_core+0x8c8/0x2860 [ 31.286457] __do_softirq+0x1b7/0x7d4 [ 31.286933] [ 31.287147] Last potentially related work creation: [ 31.287728] kasan_save_stack+0x22/0x50 [ 31.288231] __kasan_record_aux_stack+0x8e/0xa0 [ 31.288797] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.289436] remove_vma+0x139/0x170 [ 31.289888] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.290455] do_vmi_munmap+0x1f1/0x2b0 [ 31.290936] __vm_munmap+0x138/0x3a0 [ 31.291402] __x64_sys_munmap+0x59/0x80 [ 31.291896] do_syscall_64+0x3f/0x90 [ 31.292375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293020] [ 31.293240] The buggy address belongs to the object at ffff88800c4f2658 [ 31.293240] which belongs to the cache vm_area_struct of size 168 [ 31.294760] The buggy address is located 88 bytes inside of [ 31.294760] freed 168-byte region [ffff88800c4f2658, ffff88800c4f2700) [ 31.296186] [ 31.296401] The buggy address belongs to the physical page: [ 31.297066] page:000000007a826a4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4f2 [ 31.298198] memcg:ffff888019da6e01 [ 31.298637] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.299305] page_type: 0xffffffff() [ 31.299764] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.300707] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019da6e01 [ 31.301630] page dumped because: kasan: bad access detected [ 31.302316] [ 31.302531] Memory state around the buggy address: [ 31.303124] ffff88800c4f2580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.303976] ffff88800c4f2600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.304820] >ffff88800c4f2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.305671] ^ [ 31.306266] ffff88800c4f2700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.307122] ffff88800c4f2780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.307980] ================================================================== [ 31.309141] Disabling lock debugging due to kernel taint [ 33.718149] BUG: Bad rss-counter state mm:0000000026582f87 type:MM_FILEPAGES val:33 [ 33.719220] BUG: Bad rss-counter state mm:0000000026582f87 type:MM_ANONPAGES val:22 [ 34.146695] BUG: Bad rss-counter state mm:00000000111aa6cc type:MM_FILEPAGES val:33 [ 34.147635] BUG: Bad rss-counter state mm:00000000111aa6cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22111' (ECDSA) to the list of known hosts. 2023/06/21 07:25:53 fuzzer started 2023/06/21 07:25:53 dialing manager at localhost:36067 2023/06/21 07:25:53 checking machine... 2023/06/21 07:25:53 checking revisions... [ 34.906820] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:25:53 testing simple program... [ 34.960149] cgroup: Unknown subsys name 'net' [ 35.000801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:25:53 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00000000fffbefc1 RCX=ffffffff813b27e7 RDX=ffff888008d91b40 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888008da7bf8 RSP=ffff888008da7b28 R8 =0000000000000007 R9 =000000000000003e R10=0000000000000003 R11=0000000000000003 R12=0000000000000003 R13=00000000fffbefbe R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff814c0261 RFL=00000046 [---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 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=00007fdd9bc4a0b0 CR3=0000000019908000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100267b885 RBX=ffff8880133dc3f8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880133dc428 RBP=ffff8880133d9640 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff8880162098f8 R14=ffffffff813782f8 R15=ffff88800cf93f80 RIP=ffffffff818464ec RFL=00000046 [---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 00007f9528dc9900 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=00007f95282e7000 CR3=000000000c4dc000 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=d3fdd5f48436fbd700000000000aead0 XMM01=8cdec34d38af4c0a00000000000f7b50 XMM02=693bd129e125714a00000000000f7e90 XMM03=2fccd54c36d8a3f300000000000fa5f0 XMM04=c9cb8276d2e126f800000000000ae988 XMM05=f96bf37208d24b310000000000132858 XMM06=c291bd5c70af25b900000000001318f8 XMM07=e042d86d42eb936e0000000000121b50 XMM08=7f4b92dbd29923c5000000000011a760 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000