[ 23.676470] BUG: Bad rss-counter state mm:00000000a9e59453 type:MM_FILEPAGES val:33 [ 23.677784] BUG: Bad rss-counter state mm:00000000a9e59453 type:MM_ANONPAGES val:22 [ 23.813796] ================================================================== [ 23.814895] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.816210] Read of size 8 at addr ffff88800e886b38 by task sshd/221 [ 23.817141] [ 23.817403] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.818443] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.819662] Call Trace: [ 23.820059] [ 23.820402] dump_stack_lvl+0x91/0xf0 [ 23.820925] print_report+0xcc/0x620 [ 23.821403] ? __virt_addr_valid+0x102/0x340 [ 23.821943] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.822552] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.823154] kasan_report+0xbe/0xf0 [ 23.823638] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.824259] vma_interval_tree_remove+0xc75/0xec0 [ 23.824858] vma_prepare+0xc54/0x11a0 [ 23.825350] __split_vma+0x5af/0x950 [ 23.825847] ? __pfx___split_vma+0x10/0x10 [ 23.826377] ? find_held_lock+0x2c/0x110 [ 23.826901] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.827465] ? lock_is_held_type+0x9f/0x120 [ 23.828011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.828617] ? mtree_range_walk+0x632/0x900 [ 23.829161] ? mas_walk+0x5c7/0x7c0 [ 23.829638] do_vmi_munmap+0x1f1/0x2b0 [ 23.830128] mmap_region+0x1f9/0x2660 [ 23.830606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.831115] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.831841] ? __pfx_lock_acquire+0x10/0x10 [ 23.832366] ? __pfx_mmap_region+0x10/0x10 [ 23.832898] ? security_mmap_addr+0x7d/0xa0 [ 23.833422] ? get_unmapped_area+0x1f5/0x3f0 [ 23.833973] do_mmap+0x854/0xf00 [ 23.834411] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.834902] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.835467] ksys_mmap_pgoff+0x3af/0x500 [ 23.835975] do_syscall_64+0x3f/0x90 [ 23.836450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.837092] RIP: 0033:0x7f4e6594dd82 [ 23.837549] 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 [ 23.839672] RSP: 002b:00007fff72e7c248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.840577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e6594dd82 [ 23.841409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e64d87000 [ 23.842250] RBP: 00007f4e64d87000 R08: 0000000000000009 R09: 0000000000001000 [ 23.843095] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560495f0fb20 [ 23.843936] R13: 00007fff72e7c260 R14: 00007fff72e7c290 R15: 00007fff72e7c5f0 [ 23.844784] [ 23.845073] [ 23.845285] Allocated by task 214: [ 23.845708] kasan_save_stack+0x22/0x50 [ 23.846212] kasan_set_track+0x25/0x30 [ 23.846699] __kasan_slab_alloc+0x59/0x70 [ 23.847219] kmem_cache_alloc+0x16b/0x370 [ 23.847736] vm_area_dup+0x20/0x160 [ 23.848189] __split_vma+0x170/0x950 [ 23.848647] split_vma+0xc6/0x110 [ 23.849079] mprotect_fixup+0x8d2/0xb30 [ 23.849573] do_mprotect_pkey+0x87e/0xd40 [ 23.850091] __x64_sys_mprotect+0x78/0xc0 [ 23.850602] do_syscall_64+0x3f/0x90 [ 23.851071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.851740] [ 23.851951] Freed by task 214: [ 23.852344] kasan_save_stack+0x22/0x50 [ 23.852842] kasan_set_track+0x25/0x30 [ 23.853327] kasan_save_free_info+0x2b/0x50 [ 23.853852] __kasan_slab_free+0x10a/0x190 [ 23.854377] kmem_cache_free+0x10d/0x4d0 [ 23.854881] rcu_core+0x8c8/0x2860 [ 23.855318] __do_softirq+0x1b7/0x7d4 [ 23.855800] [ 23.856013] Last potentially related work creation: [ 23.856589] kasan_save_stack+0x22/0x50 [ 23.857087] __kasan_record_aux_stack+0x8e/0xa0 [ 23.857660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.858302] remove_vma+0x139/0x170 [ 23.858751] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.859300] do_vmi_munmap+0x1f1/0x2b0 [ 23.859785] __vm_munmap+0x138/0x3a0 [ 23.860246] __x64_sys_munmap+0x59/0x80 [ 23.860734] do_syscall_64+0x3f/0x90 [ 23.861204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.861840] [ 23.862053] Second to last potentially related work creation: [ 23.862737] kasan_save_stack+0x22/0x50 [ 23.863234] __kasan_record_aux_stack+0x8e/0xa0 [ 23.863826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.864465] remove_vma+0x139/0x170 [ 23.864914] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.865469] do_vmi_munmap+0x1f1/0x2b0 [ 23.865948] mmap_region+0x1f9/0x2660 [ 23.866419] do_mmap+0x854/0xf00 [ 23.866850] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.867339] ksys_mmap_pgoff+0x3af/0x500 [ 23.867845] do_syscall_64+0x3f/0x90 [ 23.868315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.868950] [ 23.869163] The buggy address belongs to the object at ffff88800e886ae0 [ 23.869163] which belongs to the cache vm_area_struct of size 168 [ 23.870611] The buggy address is located 88 bytes inside of [ 23.870611] freed 168-byte region [ffff88800e886ae0, ffff88800e886b88) [ 23.871997] [ 23.872214] The buggy address belongs to the physical page: [ 23.872875] page:0000000044beb99c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe886 [ 23.873953] memcg:ffff88800e228c01 [ 23.874379] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.875023] page_type: 0xffffffff() [ 23.875474] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a2f40 dead000000000002 [ 23.876433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e228c01 [ 23.877331] page dumped because: kasan: bad access detected [ 23.877983] [ 23.878195] Memory state around the buggy address: [ 23.878774] ffff88800e886a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.879639] ffff88800e886a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 23.880487] >ffff88800e886b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.881329] ^ [ 23.881934] ffff88800e886b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.882778] ffff88800e886c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.883625] ================================================================== [ 23.884767] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.900300] BUG: Bad rss-counter state mm:0000000014134641 type:MM_FILEPAGES val:33 [ 25.901208] BUG: Bad rss-counter state mm:0000000014134641 type:MM_ANONPAGES val:22 [ 26.443345] BUG: Bad rss-counter state mm:00000000e054d553 type:MM_FILEPAGES val:33 [ 26.444537] BUG: Bad rss-counter state mm:00000000e054d553 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14683' (ECDSA) to the list of known hosts. 2023/06/20 13:32:55 fuzzer started 2023/06/20 13:32:55 dialing manager at localhost:36067 2023/06/20 13:32:55 checking machine... 2023/06/20 13:32:55 checking revisions... [ 27.108230] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:32:55 testing simple program... [ 27.157824] cgroup: Unknown subsys name 'net' [ 27.203217] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:32:55 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85fa4f5c RCX=ffffffff8363b5a6 RDX=0000000000000000 RSI=ffffffff863b353c RDI=ffffffff85fa4f3c RBP=ffffffff85fa4f5c RSP=ffff888019c47948 R8 =ffffffff863b353c R9 =ffff888019c47a40 R10=0000000000038001 R11=000000000008a95e R12=ffffffff85fa4f5c R13=ffffffff85fa4f3c R14=ffffffff85fa4f58 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007fbd69711900 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=00007fbd69cc90b0 CR3=000000000ed14000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007f3a261c2e60 CR3=000000000c9d6000 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=32333a3331203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343933 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000