[ 32.769803] BUG: Bad rss-counter state mm:00000000035a333f type:MM_FILEPAGES val:33 [ 32.771855] BUG: Bad rss-counter state mm:00000000035a333f type:MM_ANONPAGES val:22 [ 32.945192] ================================================================== [ 32.946279] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.947403] Read of size 8 at addr ffff88801a2e8798 by task sshd/218 [ 32.948529] [ 32.948790] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.949826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.950983] Call Trace: [ 32.951367] [ 32.951730] dump_stack_lvl+0x91/0xf0 [ 32.952288] print_report+0xcc/0x620 [ 32.952780] ? __virt_addr_valid+0x102/0x340 [ 32.953338] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.953973] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.954596] kasan_report+0xbe/0xf0 [ 32.955075] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.955725] vma_interval_tree_remove+0xc75/0xec0 [ 32.956335] vma_prepare+0xc54/0x11a0 [ 32.956832] __split_vma+0x5af/0x950 [ 32.957309] ? __pfx___split_vma+0x10/0x10 [ 32.957842] ? find_held_lock+0x2c/0x110 [ 32.958374] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.958940] ? lock_is_held_type+0x9f/0x120 [ 32.959478] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.960118] ? mtree_range_walk+0x632/0x900 [ 32.960668] ? mas_walk+0x5c7/0x7c0 [ 32.961147] do_vmi_munmap+0x1f1/0x2b0 [ 32.961644] mmap_region+0x1f9/0x2660 [ 32.962133] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.962647] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.963364] ? __pfx_lock_acquire+0x10/0x10 [ 32.963911] ? __pfx_mmap_region+0x10/0x10 [ 32.964445] ? security_mmap_addr+0x7d/0xa0 [ 32.964983] ? get_unmapped_area+0x1f5/0x3f0 [ 32.965540] do_mmap+0x854/0xf00 [ 32.965984] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.966476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.967041] ksys_mmap_pgoff+0x3af/0x500 [ 32.967550] do_syscall_64+0x3f/0x90 [ 32.968038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.968689] RIP: 0033:0x7f5010707d82 [ 32.969147] 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 [ 32.971283] RSP: 002b:00007ffc4d2f9f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.972203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5010707d82 [ 32.973054] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f500fb41000 [ 32.973900] RBP: 00007f500fb41000 R08: 0000000000000009 R09: 0000000000001000 [ 32.974743] R10: 0000000000000812 R11: 0000000000000206 R12: 000055785ce30b20 [ 32.975591] R13: 00007ffc4d2f9f40 R14: 00007ffc4d2f9f70 R15: 00007ffc4d2fa2d0 [ 32.976454] [ 32.976745] [ 32.976966] Allocated by task 210: [ 32.977398] kasan_save_stack+0x22/0x50 [ 32.977904] kasan_set_track+0x25/0x30 [ 32.978397] __kasan_slab_alloc+0x59/0x70 [ 32.978929] kmem_cache_alloc+0x16b/0x370 [ 32.979447] vm_area_dup+0x20/0x160 [ 32.979910] __split_vma+0x170/0x950 [ 32.980402] split_vma+0xc6/0x110 [ 32.980853] mprotect_fixup+0x8d2/0xb30 [ 32.981364] do_mprotect_pkey+0x87e/0xd40 [ 32.981885] __x64_sys_mprotect+0x78/0xc0 [ 32.982405] do_syscall_64+0x3f/0x90 [ 32.982884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.983523] [ 32.983760] Freed by task 202: [ 32.984155] kasan_save_stack+0x22/0x50 [ 32.984658] kasan_set_track+0x25/0x30 [ 32.985160] kasan_save_free_info+0x2b/0x50 [ 32.985694] __kasan_slab_free+0x10a/0x190 [ 32.986232] kmem_cache_free+0x10d/0x4d0 [ 32.986747] rcu_core+0x8c8/0x2860 [ 32.987196] __do_softirq+0x1b7/0x7d4 [ 32.987681] [ 32.987902] Last potentially related work creation: [ 32.988481] kasan_save_stack+0x22/0x50 [ 32.988988] __kasan_record_aux_stack+0x8e/0xa0 [ 32.989652] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.990298] remove_vma+0x139/0x170 [ 32.990751] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.991306] do_vmi_munmap+0x1f1/0x2b0 [ 32.991813] __vm_munmap+0x138/0x3a0 [ 32.992297] __x64_sys_munmap+0x59/0x80 [ 32.992791] do_syscall_64+0x3f/0x90 [ 32.993278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.993931] [ 32.994148] The buggy address belongs to the object at ffff88801a2e8740 [ 32.994148] which belongs to the cache vm_area_struct of size 168 [ 32.995635] The buggy address is located 88 bytes inside of [ 32.995635] freed 168-byte region [ffff88801a2e8740, ffff88801a2e87e8) [ 32.997041] [ 32.997286] The buggy address belongs to the physical page: [ 32.997944] page:0000000030f6c8bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2e8 [ 32.999032] memcg:ffff88801a2e9001 [ 32.999479] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.000150] page_type: 0xffffffff() [ 33.000619] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.001535] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2e9001 [ 33.002453] page dumped because: kasan: bad access detected [ 33.003133] [ 33.003346] Memory state around the buggy address: [ 33.003962] ffff88801a2e8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.004832] ffff88801a2e8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.005701] >ffff88801a2e8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.006549] ^ [ 33.007054] ffff88801a2e8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.007922] ffff88801a2e8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.008801] ================================================================== [ 33.009744] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.064981] BUG: Bad rss-counter state mm:00000000a4791a49 type:MM_FILEPAGES val:33 [ 35.066365] BUG: Bad rss-counter state mm:00000000a4791a49 type:MM_ANONPAGES val:22 [ 35.535094] BUG: Bad rss-counter state mm:00000000fe27e5ab type:MM_FILEPAGES val:33 [ 35.536171] BUG: Bad rss-counter state mm:00000000fe27e5ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27990' (ECDSA) to the list of known hosts. 2023/06/19 23:13:34 fuzzer started 2023/06/19 23:13:34 dialing manager at localhost:44161 2023/06/19 23:13:34 checking machine... 2023/06/19 23:13:34 checking revisions... [ 36.232681] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:13:34 testing simple program... [ 36.284440] cgroup: Unknown subsys name 'net' [ 36.321159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:13:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83640960 RDX=dffffc0000000000 RSI=ffffffff83640961 RDI=ffff8880179376e0 RBP=ffff888017937738 RSP=ffff888017937670 R8 =0000000000000001 R9 =ffff888017937720 R10=0000000000038001 R11=000000000008aa86 R12=ffff888017937740 R13=ffff888017937728 R14=ffff888017937721 R15=ffff8880179376e0 RIP=ffffffff81130719 RFL=00000286 [--S--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 00007efc9fde3900 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=00007ffe2ca4c000 CR3=000000000fc98000 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=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=00007fdafb9e40f0 CR3=000000000ebd4000 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=2033333a33313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a33313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000