[ 23.925674] BUG: Bad rss-counter state mm:000000000e79d39f type:MM_FILEPAGES val:33 [ 23.927112] BUG: Bad rss-counter state mm:000000000e79d39f type:MM_ANONPAGES val:22 [ 24.079106] ================================================================== [ 24.080187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.081302] Read of size 8 at addr ffff888017aaac20 by task sshd/219 [ 24.082372] [ 24.082608] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.083522] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.084572] Call Trace: [ 24.084910] [ 24.085212] dump_stack_lvl+0x91/0xf0 [ 24.085743] print_report+0xcc/0x620 [ 24.086257] ? __virt_addr_valid+0x102/0x340 [ 24.086838] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.087488] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.088142] kasan_report+0xbe/0xf0 [ 24.088648] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.089304] vma_interval_tree_remove+0xc75/0xec0 [ 24.089982] vma_prepare+0xc54/0x11a0 [ 24.090506] __split_vma+0x5af/0x950 [ 24.091025] ? __pfx___split_vma+0x10/0x10 [ 24.091611] ? find_held_lock+0x2c/0x110 [ 24.092181] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.092803] ? lock_is_held_type+0x9f/0x120 [ 24.093397] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.094084] ? mtree_range_walk+0x632/0x900 [ 24.094695] ? mas_walk+0x5c7/0x7c0 [ 24.095216] do_vmi_munmap+0x1f1/0x2b0 [ 24.095755] mmap_region+0x1f9/0x2660 [ 24.096284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.096851] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.097646] ? __pfx_lock_acquire+0x10/0x10 [ 24.098253] ? __pfx_mmap_region+0x10/0x10 [ 24.098840] ? security_mmap_addr+0x7d/0xa0 [ 24.099426] ? get_unmapped_area+0x1f5/0x3f0 [ 24.100036] do_mmap+0x854/0xf00 [ 24.100517] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.101057] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.101679] ksys_mmap_pgoff+0x3af/0x500 [ 24.102250] do_syscall_64+0x3f/0x90 [ 24.102777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.103495] RIP: 0033:0x7f0dd9a1ad82 [ 24.103997] 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 [ 24.106422] RSP: 002b:00007ffef3ba7be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.107425] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0dd9a1ad82 [ 24.108358] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0dd8e54000 [ 24.109290] RBP: 00007f0dd8e54000 R08: 0000000000000009 R09: 0000000000001000 [ 24.110232] R10: 0000000000000812 R11: 0000000000000206 R12: 000056275b454d90 [ 24.111160] R13: 00007ffef3ba7c00 R14: 00007ffef3ba7c30 R15: 00007ffef3ba7f90 [ 24.112097] [ 24.112415] [ 24.112651] Allocated by task 212: [ 24.113126] kasan_save_stack+0x22/0x50 [ 24.113677] kasan_set_track+0x25/0x30 [ 24.114246] __kasan_slab_alloc+0x59/0x70 [ 24.114796] kmem_cache_alloc+0x16b/0x370 [ 24.115348] vm_area_dup+0x20/0x160 [ 24.115839] __split_vma+0x170/0x950 [ 24.116334] split_vma+0xc6/0x110 [ 24.116800] mprotect_fixup+0x8d2/0xb30 [ 24.117331] do_mprotect_pkey+0x87e/0xd40 [ 24.117895] __x64_sys_mprotect+0x78/0xc0 [ 24.118461] do_syscall_64+0x3f/0x90 [ 24.118965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.119651] [ 24.119877] Freed by task 19: [ 24.120283] kasan_save_stack+0x22/0x50 [ 24.120824] kasan_set_track+0x25/0x30 [ 24.121344] kasan_save_free_info+0x2b/0x50 [ 24.121922] __kasan_slab_free+0x10a/0x190 [ 24.122499] kmem_cache_free+0x10d/0x4d0 [ 24.123043] rcu_core+0x8c8/0x2860 [ 24.123517] __do_softirq+0x1b7/0x7d4 [ 24.124022] [ 24.124248] Last potentially related work creation: [ 24.124875] kasan_save_stack+0x22/0x50 [ 24.125409] __kasan_record_aux_stack+0x8e/0xa0 [ 24.126037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.126720] remove_vma+0x139/0x170 [ 24.127196] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.127780] do_vmi_munmap+0x1f1/0x2b0 [ 24.128290] __vm_munmap+0x138/0x3a0 [ 24.128779] __x64_sys_munmap+0x59/0x80 [ 24.129310] do_syscall_64+0x3f/0x90 [ 24.129819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.130502] [ 24.130731] The buggy address belongs to the object at ffff888017aaabc8 [ 24.130731] which belongs to the cache vm_area_struct of size 168 [ 24.132292] The buggy address is located 88 bytes inside of [ 24.132292] freed 168-byte region [ffff888017aaabc8, ffff888017aaac70) [ 24.133799] [ 24.134032] The buggy address belongs to the physical page: [ 24.134726] page:00000000b654b61f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17aaa [ 24.135875] memcg:ffff88800d362b01 [ 24.136325] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.137063] page_type: 0xffffffff() [ 24.137542] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.138523] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d362b01 [ 24.139483] page dumped because: kasan: bad access detected [ 24.140186] [ 24.140415] Memory state around the buggy address: [ 24.141029] ffff888017aaab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.142173] ffff888017aaab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.143337] >ffff888017aaac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.144351] ^ [ 24.144921] ffff888017aaac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.145840] ffff888017aaad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.146747] ================================================================== [ 24.148111] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.248329] BUG: Bad rss-counter state mm:000000005ed70616 type:MM_FILEPAGES val:33 [ 26.249506] BUG: Bad rss-counter state mm:000000005ed70616 type:MM_ANONPAGES val:22 [ 26.686587] BUG: Bad rss-counter state mm:00000000d24ba2a7 type:MM_FILEPAGES val:33 [ 26.687683] BUG: Bad rss-counter state mm:00000000d24ba2a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3118' (ECDSA) to the list of known hosts. 2023/06/20 15:27:06 fuzzer started 2023/06/20 15:27:07 dialing manager at localhost:36067 2023/06/20 15:27:07 checking machine... 2023/06/20 15:27:07 checking revisions... [ 27.427261] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:27:07 testing simple program... [ 27.474218] cgroup: Unknown subsys name 'net' [ 27.564412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:27:06 Registers: info registers vcpu 0 RAX=ffff8880190d9318 RBX=ffff88800971cea8 RCX=1ffff1100165faac RDX=dffffc0000000000 RSI=ffff8880190d9160 RDI=ffff88800971ced8 RBP=ffff88800e44b9f8 RSP=ffff88800c677c58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880190d9028 R13=0000000000000000 R14=ffff888008f21768 R15=ffff888008f21720 RIP=ffffffff81847688 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 00007f63f756c900 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=00007f63f7b240b0 CR3=0000000018c74000 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=2036303a37323a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a37323a3531203032 XMM08=3d656e696c646d632022656369767265 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=00007fc425e3c5f0 CR3=000000000c948000 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=8a066c0df91f67a04f46197d066923b0 XMM02=000000000011ac88eff9b2d0a8fce9cb XMM03=000000000011ad582c67c8bc2e329bc3 XMM04=4853ed248f863b1e00000000000ae988 XMM05=dfcdbad4f1609c370000000000130e50 XMM06=9315ffb98d38dc2c000000000012fd58 XMM07=e042d86d42eb936e0000000000121260 XMM08=c8f90052b75ceed9000000000011ad58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000