[ 23.981728] BUG: Bad rss-counter state mm:000000006b581887 type:MM_FILEPAGES val:33 [ 23.982969] BUG: Bad rss-counter state mm:000000006b581887 type:MM_ANONPAGES val:22 [ 24.020842] ================================================================== [ 24.021908] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.023020] Read of size 8 at addr ffff88800e5106b0 by task sshd/220 [ 24.024102] [ 24.024382] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.025428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.026604] Call Trace: [ 24.026937] [ 24.027226] dump_stack_lvl+0x91/0xf0 [ 24.027718] print_report+0xcc/0x620 [ 24.028200] ? __virt_addr_valid+0x102/0x340 [ 24.028749] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.029365] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.029982] kasan_report+0xbe/0xf0 [ 24.030457] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.031094] vma_interval_tree_remove+0xc75/0xec0 [ 24.031708] vma_prepare+0xc54/0x11a0 [ 24.032260] __split_vma+0x5af/0x950 [ 24.032794] ? __pfx___split_vma+0x10/0x10 [ 24.033318] ? find_held_lock+0x2c/0x110 [ 24.033838] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.034394] ? lock_is_held_type+0x9f/0x120 [ 24.034954] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.035553] ? mtree_range_walk+0x632/0x900 [ 24.036101] ? mas_walk+0x5c7/0x7c0 [ 24.036572] do_vmi_munmap+0x1f1/0x2b0 [ 24.037064] mmap_region+0x1f9/0x2660 [ 24.037546] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.038057] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.038807] ? __pfx_lock_acquire+0x10/0x10 [ 24.039342] ? __pfx_mmap_region+0x10/0x10 [ 24.039897] ? security_mmap_addr+0x7d/0xa0 [ 24.040476] ? get_unmapped_area+0x1f5/0x3f0 [ 24.041050] do_mmap+0x854/0xf00 [ 24.041491] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.041991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.042556] ksys_mmap_pgoff+0x3af/0x500 [ 24.043099] do_syscall_64+0x3f/0x90 [ 24.043586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.044227] RIP: 0033:0x7f36a3fd4d82 [ 24.044690] 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 [ 24.046839] RSP: 002b:00007ffe51733e88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.047762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36a3fd4d82 [ 24.048729] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36a340e000 [ 24.049582] RBP: 00007f36a340e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.050433] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561843ebf70 [ 24.051310] R13: 00007ffe51733ea0 R14: 00007ffe51733ed0 R15: 00007ffe51734230 [ 24.052162] [ 24.052457] [ 24.052671] Allocated by task 211: [ 24.053104] kasan_save_stack+0x22/0x50 [ 24.053611] kasan_set_track+0x25/0x30 [ 24.054110] __kasan_slab_alloc+0x59/0x70 [ 24.054632] kmem_cache_alloc+0x16b/0x370 [ 24.055197] vm_area_dup+0x20/0x160 [ 24.055655] __split_vma+0x170/0x950 [ 24.056196] split_vma+0xc6/0x110 [ 24.056723] mprotect_fixup+0x8d2/0xb30 [ 24.057234] do_mprotect_pkey+0x87e/0xd40 [ 24.057758] __x64_sys_mprotect+0x78/0xc0 [ 24.058276] do_syscall_64+0x3f/0x90 [ 24.058758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.059406] [ 24.059626] Freed by task 13: [ 24.060071] kasan_save_stack+0x22/0x50 [ 24.060664] kasan_set_track+0x25/0x30 [ 24.061181] kasan_save_free_info+0x2b/0x50 [ 24.061714] __kasan_slab_free+0x10a/0x190 [ 24.062319] kmem_cache_free+0x10d/0x4d0 [ 24.062845] rcu_core+0x8c8/0x2860 [ 24.063289] __do_softirq+0x1b7/0x7d4 [ 24.063785] [ 24.064045] Last potentially related work creation: [ 24.064749] kasan_save_stack+0x22/0x50 [ 24.065255] __kasan_record_aux_stack+0x8e/0xa0 [ 24.065832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.066485] remove_vma+0x139/0x170 [ 24.066950] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.067512] do_vmi_munmap+0x1f1/0x2b0 [ 24.068014] __vm_munmap+0x138/0x3a0 [ 24.068482] __x64_sys_munmap+0x59/0x80 [ 24.068985] do_syscall_64+0x3f/0x90 [ 24.069455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.070100] [ 24.070313] Second to last potentially related work creation: [ 24.071018] kasan_save_stack+0x22/0x50 [ 24.071520] __kasan_record_aux_stack+0x8e/0xa0 [ 24.072090] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.072736] remove_vma+0x139/0x170 [ 24.073183] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.073736] do_vmi_munmap+0x1f1/0x2b0 [ 24.074217] mmap_region+0x1f9/0x2660 [ 24.074699] do_mmap+0x854/0xf00 [ 24.075129] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.075612] ksys_mmap_pgoff+0x3af/0x500 [ 24.076107] do_syscall_64+0x3f/0x90 [ 24.076582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.077220] [ 24.077436] The buggy address belongs to the object at ffff88800e510658 [ 24.077436] which belongs to the cache vm_area_struct of size 168 [ 24.078905] The buggy address is located 88 bytes inside of [ 24.078905] freed 168-byte region [ffff88800e510658, ffff88800e510700) [ 24.080293] [ 24.080509] The buggy address belongs to the physical page: [ 24.081164] page:0000000004f5d98f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe510 [ 24.082233] memcg:ffff88800df53c01 [ 24.082655] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.083318] page_type: 0xffffffff() [ 24.083765] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380bc0 dead000000000004 [ 24.084671] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df53c01 [ 24.085577] page dumped because: kasan: bad access detected [ 24.086230] [ 24.086445] Memory state around the buggy address: [ 24.087046] ffff88800e510580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.087893] ffff88800e510600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.088748] >ffff88800e510680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.089591] ^ [ 24.090171] ffff88800e510700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.091030] ffff88800e510780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.091893] ================================================================== [ 24.092814] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.803309] BUG: Bad rss-counter state mm:000000005554b2c5 type:MM_FILEPAGES val:33 [ 26.804465] BUG: Bad rss-counter state mm:000000005554b2c5 type:MM_ANONPAGES val:22 [ 27.230787] BUG: Bad rss-counter state mm:00000000f6661b1a type:MM_FILEPAGES val:33 [ 27.231988] BUG: Bad rss-counter state mm:00000000f6661b1a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39435' (ECDSA) to the list of known hosts. 2023/06/20 16:07:04 fuzzer started 2023/06/20 16:07:04 dialing manager at localhost:36067 2023/06/20 16:07:04 checking machine... 2023/06/20 16:07:04 checking revisions... [ 27.899483] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:07:04 testing simple program... [ 27.948021] cgroup: Unknown subsys name 'net' [ 27.990508] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:07:03 Registers: info registers vcpu 0 RAX=dead000000000122 RBX=ffff88801a366048 RCX=ffffffff812e0135 RDX=1ffff1100346cc09 RSI=ffffffff87b89f80 RDI=ffff888016629180 RBP=ffff88801a366130 RSP=ffff88806ce09e08 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000287 R13=ffff888016629178 R14=ffffffff813782f8 R15=ffff888013e27a80 RIP=ffffffff8451968c 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 00007f3750a11900 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=00007f374fe51e78 CR3=000000000d660000 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=80e27b37f2183d8704449ab2d2ffaa9e XMM02=000000000011aa88d59e07bde36eea69 XMM03=000000000011abb0ec2efd57dc4c00df XMM04=18fedc6c04ee66c500000000000ae988 XMM05=ec1d3af1088ebde80000000000134190 XMM06=4fda316b135da52b0000000000132338 XMM07=fb795ef6d657705600000000001215f8 XMM08=2c67c8bc2e329bc3000000000011abb0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83639ab0 RDX=dffffc0000000000 RSI=000000000002639a RDI=ffff888016a1fab0 RBP=ffff888016a1fb08 RSP=ffff888016a1fa40 R8 =0000000000000001 R9 =ffff888016a1faf0 R10=0000000000038001 R11=000000000008a6d9 R12=ffff888016a1fb10 R13=ffff888016a1faf8 R14=ffff888016a1faf1 R15=ffff888016a1fab0 RIP=ffffffff81130764 RFL=00000287 [--S--PC] 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 00007fd7f40bc900 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=00007ffdaa1c6000 CR3=000000000dbd6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000