[ 23.922247] BUG: Bad rss-counter state mm:000000002bb5f58b type:MM_FILEPAGES val:33 [ 23.924009] BUG: Bad rss-counter state mm:000000002bb5f58b type:MM_ANONPAGES val:22 [ 24.091468] ================================================================== [ 24.092622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.093937] Read of size 8 at addr ffff88800e2834e0 by task sshd/219 [ 24.094890] [ 24.095157] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.096216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.097407] Call Trace: [ 24.097728] [ 24.098010] dump_stack_lvl+0x91/0xf0 [ 24.098500] print_report+0xcc/0x620 [ 24.098985] ? __virt_addr_valid+0x102/0x340 [ 24.099538] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.100152] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.100784] kasan_report+0xbe/0xf0 [ 24.101259] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101886] vma_interval_tree_remove+0xc75/0xec0 [ 24.102494] vma_prepare+0xc54/0x11a0 [ 24.102974] __split_vma+0x5af/0x950 [ 24.103452] ? __pfx___split_vma+0x10/0x10 [ 24.103977] ? find_held_lock+0x2c/0x110 [ 24.104517] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.105090] ? lock_is_held_type+0x9f/0x120 [ 24.105637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.106246] ? mtree_range_walk+0x632/0x900 [ 24.106817] ? mas_walk+0x5c7/0x7c0 [ 24.107297] do_vmi_munmap+0x1f1/0x2b0 [ 24.107789] mmap_region+0x1f9/0x2660 [ 24.108271] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.108818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.109530] ? __pfx_lock_acquire+0x10/0x10 [ 24.110060] ? __pfx_mmap_region+0x10/0x10 [ 24.110605] ? security_mmap_addr+0x7d/0xa0 [ 24.111129] ? get_unmapped_area+0x1f5/0x3f0 [ 24.111694] do_mmap+0x854/0xf00 [ 24.112130] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.112647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.113218] ksys_mmap_pgoff+0x3af/0x500 [ 24.113725] do_syscall_64+0x3f/0x90 [ 24.114219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.114869] RIP: 0033:0x7f2526864d82 [ 24.115345] 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 [ 24.117491] RSP: 002b:00007ffc0b2fccc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.118394] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2526864d82 [ 24.119239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2525c9e000 [ 24.120083] RBP: 00007f2525c9e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.120942] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556bb8659f70 [ 24.121790] R13: 00007ffc0b2fcce0 R14: 00007ffc0b2fcd10 R15: 00007ffc0b2fd070 [ 24.122667] [ 24.122965] [ 24.123187] Allocated by task 211: [ 24.123633] kasan_save_stack+0x22/0x50 [ 24.124145] kasan_set_track+0x25/0x30 [ 24.124684] __kasan_slab_alloc+0x59/0x70 [ 24.125225] kmem_cache_alloc+0x16b/0x370 [ 24.125739] vm_area_dup+0x20/0x160 [ 24.126208] __split_vma+0x170/0x950 [ 24.126673] split_vma+0xc6/0x110 [ 24.127112] mprotect_fixup+0x8d2/0xb30 [ 24.127631] do_mprotect_pkey+0x87e/0xd40 [ 24.128158] __x64_sys_mprotect+0x78/0xc0 [ 24.128692] do_syscall_64+0x3f/0x90 [ 24.129170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.129816] [ 24.130035] Freed by task 19: [ 24.130437] kasan_save_stack+0x22/0x50 [ 24.130950] kasan_set_track+0x25/0x30 [ 24.131455] kasan_save_free_info+0x2b/0x50 [ 24.131995] __kasan_slab_free+0x10a/0x190 [ 24.132545] kmem_cache_free+0x10d/0x4d0 [ 24.133059] rcu_core+0x8c8/0x2860 [ 24.133504] __do_softirq+0x1b7/0x7d4 [ 24.134066] [ 24.134282] Last potentially related work creation: [ 24.134860] kasan_save_stack+0x22/0x50 [ 24.135371] __kasan_record_aux_stack+0x8e/0xa0 [ 24.135942] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.136600] remove_vma+0x139/0x170 [ 24.137053] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.137613] do_vmi_munmap+0x1f1/0x2b0 [ 24.138098] __vm_munmap+0x138/0x3a0 [ 24.138565] __x64_sys_munmap+0x59/0x80 [ 24.139067] do_syscall_64+0x3f/0x90 [ 24.139541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.140186] [ 24.140404] Second to last potentially related work creation: [ 24.141095] kasan_save_stack+0x22/0x50 [ 24.141602] __kasan_record_aux_stack+0x8e/0xa0 [ 24.142182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.142824] remove_vma+0x139/0x170 [ 24.143277] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.143830] do_vmi_munmap+0x1f1/0x2b0 [ 24.144317] mmap_region+0x1f9/0x2660 [ 24.144812] do_mmap+0x854/0xf00 [ 24.145243] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.145727] ksys_mmap_pgoff+0x3af/0x500 [ 24.146226] do_syscall_64+0x3f/0x90 [ 24.146704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.147353] [ 24.147573] The buggy address belongs to the object at ffff88800e283488 [ 24.147573] which belongs to the cache vm_area_struct of size 168 [ 24.149037] The buggy address is located 88 bytes inside of [ 24.149037] freed 168-byte region [ffff88800e283488, ffff88800e283530) [ 24.150436] [ 24.150654] The buggy address belongs to the physical page: [ 24.151311] page:000000003ca62116 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe283 [ 24.152399] memcg:ffff88800e0fc201 [ 24.152830] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.153531] page_type: 0xffffffff() [ 24.153978] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.154889] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0fc201 [ 24.155803] page dumped because: kasan: bad access detected [ 24.156464] [ 24.156698] Memory state around the buggy address: [ 24.157275] ffff88800e283380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.158125] ffff88800e283400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.158980] >ffff88800e283480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.159825] ^ [ 24.160598] ffff88800e283500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.161447] ffff88800e283580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.162295] ================================================================== [ 24.163242] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.177907] BUG: Bad rss-counter state mm:000000006c05d714 type:MM_FILEPAGES val:33 [ 26.178901] BUG: Bad rss-counter state mm:000000006c05d714 type:MM_ANONPAGES val:22 [ 26.783079] BUG: Bad rss-counter state mm:0000000011628d05 type:MM_FILEPAGES val:33 [ 26.784269] BUG: Bad rss-counter state mm:0000000011628d05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22854' (ECDSA) to the list of known hosts. 2023/06/21 01:14:21 fuzzer started 2023/06/21 01:14:21 dialing manager at localhost:36067 2023/06/21 01:14:21 checking machine... 2023/06/21 01:14:21 checking revisions... [ 27.446479] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:14:21 testing simple program... [ 27.501456] cgroup: Unknown subsys name 'net' [ 27.607730] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:14:20 Registers: info registers vcpu 0 RAX=00000000000b5080 RBX=0000000000000001 RCX=ffffffff8450cc7e RDX=00000000000b508d RSI=00000000000350cc RDI=ffffffff864b2056 RBP=ffff88800eecf4e8 RSP=ffff88800eecf420 R8 =ffffffff864b2008 R9 =ffff88800eecf4d0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800eecf4f0 R13=ffff88800eecf4d8 R14=ffff88800eecf4d1 R15=ffff88800eecf490 RIP=ffffffff81130868 RFL=00000293 [--S-A-C] 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 00007f63470e9700 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=00007f973c629610 CR3=000000000fd04000 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=2030323a34313a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a34313a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81741111 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801c9f7d01 RSI=ffff88801c9f7dc8 RDI=ffff88801c9f7dc8 RBP=ffff88801c9f6ff0 RSP=ffff88801c9f6f28 R8 =ffffffff861295f6 R9 =ffff88801c9f6fd8 R10=0000000000038001 R11=000000000001e427 R12=ffff88801c9f6ff8 R13=ffff88801c9f6fe0 R14=ffff88801c9f7dd0 R15=ffff88801c9f6f98 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007eff33af2900 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=00007eff33ad1020 CR3=000000000e6ca000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000