[ 24.015019] BUG: Bad rss-counter state mm:0000000097458f3b type:MM_FILEPAGES val:33 [ 24.017043] BUG: Bad rss-counter state mm:0000000097458f3b type:MM_ANONPAGES val:22 [ 24.179006] ================================================================== [ 24.179908] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.180848] Read of size 8 at addr ffff88800dd34310 by task sshd/219 [ 24.181730] [ 24.181948] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.182819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.183812] Call Trace: [ 24.184134] [ 24.184420] dump_stack_lvl+0x91/0xf0 [ 24.184924] print_report+0xcc/0x620 [ 24.185412] ? __virt_addr_valid+0x102/0x340 [ 24.185963] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.186598] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.187211] kasan_report+0xbe/0xf0 [ 24.187679] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.188290] vma_interval_tree_remove+0xc75/0xec0 [ 24.188887] vma_prepare+0xc54/0x11a0 [ 24.189369] __split_vma+0x5af/0x950 [ 24.189834] ? __pfx___split_vma+0x10/0x10 [ 24.190367] ? find_held_lock+0x2c/0x110 [ 24.190882] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.191446] ? lock_is_held_type+0x9f/0x120 [ 24.191985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.192582] ? mtree_range_walk+0x632/0x900 [ 24.193130] ? mas_walk+0x5c7/0x7c0 [ 24.193601] do_vmi_munmap+0x1f1/0x2b0 [ 24.194092] mmap_region+0x1f9/0x2660 [ 24.194578] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.195088] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.195800] ? __pfx_lock_acquire+0x10/0x10 [ 24.196337] ? __pfx_mmap_region+0x10/0x10 [ 24.196864] ? security_mmap_addr+0x7d/0xa0 [ 24.197389] ? get_unmapped_area+0x1f5/0x3f0 [ 24.197936] do_mmap+0x854/0xf00 [ 24.198395] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.198884] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.199436] ksys_mmap_pgoff+0x3af/0x500 [ 24.199940] do_syscall_64+0x3f/0x90 [ 24.200421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.201065] RIP: 0033:0x7f7d46c9dd82 [ 24.201515] 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 [ 24.203622] RSP: 002b:00007fff2c386a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.204514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d46c9dd82 [ 24.205353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d460d7000 [ 24.206211] RBP: 00007f7d460d7000 R08: 0000000000000009 R09: 0000000000001000 [ 24.207053] R10: 0000000000000812 R11: 0000000000000206 R12: 000055961b93fec0 [ 24.207888] R13: 00007fff2c386a90 R14: 00007fff2c386ac0 R15: 00007fff2c386e20 [ 24.208742] [ 24.209030] [ 24.209244] Allocated by task 212: [ 24.209686] kasan_save_stack+0x22/0x50 [ 24.210204] kasan_set_track+0x25/0x30 [ 24.210693] __kasan_slab_alloc+0x59/0x70 [ 24.211217] kmem_cache_alloc+0x16b/0x370 [ 24.211728] vm_area_dup+0x20/0x160 [ 24.212185] __split_vma+0x170/0x950 [ 24.212651] split_vma+0xc6/0x110 [ 24.213090] mprotect_fixup+0x8d2/0xb30 [ 24.213591] do_mprotect_pkey+0x87e/0xd40 [ 24.214109] __x64_sys_mprotect+0x78/0xc0 [ 24.214648] do_syscall_64+0x3f/0x90 [ 24.215127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.215765] [ 24.215982] Freed by task 212: [ 24.216370] kasan_save_stack+0x22/0x50 [ 24.216872] kasan_set_track+0x25/0x30 [ 24.217367] kasan_save_free_info+0x2b/0x50 [ 24.217894] __kasan_slab_free+0x10a/0x190 [ 24.218441] kmem_cache_free+0x10d/0x4d0 [ 24.218944] rcu_core+0x8c8/0x2860 [ 24.219378] __do_softirq+0x1b7/0x7d4 [ 24.219853] [ 24.220068] Last potentially related work creation: [ 24.220649] kasan_save_stack+0x22/0x50 [ 24.221145] __kasan_record_aux_stack+0x8e/0xa0 [ 24.221708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.222356] remove_vma+0x139/0x170 [ 24.222802] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.223352] do_vmi_munmap+0x1f1/0x2b0 [ 24.223833] __vm_munmap+0x138/0x3a0 [ 24.224301] __x64_sys_munmap+0x59/0x80 [ 24.224797] do_syscall_64+0x3f/0x90 [ 24.225268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.225899] [ 24.226114] The buggy address belongs to the object at ffff88800dd342b8 [ 24.226114] which belongs to the cache vm_area_struct of size 168 [ 24.227586] The buggy address is located 88 bytes inside of [ 24.227586] freed 168-byte region [ffff88800dd342b8, ffff88800dd34360) [ 24.228976] [ 24.229192] The buggy address belongs to the physical page: [ 24.229842] page:0000000039ff9e02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd34 [ 24.230940] memcg:ffff88800ce66101 [ 24.231358] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.232054] page_type: 0xffffffff() [ 24.232505] raw: 0100000000000200 ffff8880087a0c80 ffffea00003dd380 dead000000000003 [ 24.233414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce66101 [ 24.234325] page dumped because: kasan: bad access detected [ 24.234983] [ 24.235198] Memory state around the buggy address: [ 24.235767] ffff88800dd34200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.236616] ffff88800dd34280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.237467] >ffff88800dd34300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.238331] ^ [ 24.238792] ffff88800dd34380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.239647] ffff88800dd34400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.240491] ================================================================== [ 24.241523] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.895978] BUG: Bad rss-counter state mm:00000000ec838e6f type:MM_FILEPAGES val:33 [ 25.896728] BUG: Bad rss-counter state mm:00000000ec838e6f type:MM_ANONPAGES val:22 [ 26.250814] BUG: Bad rss-counter state mm:00000000035df107 type:MM_FILEPAGES val:33 [ 26.252144] BUG: Bad rss-counter state mm:00000000035df107 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63265' (ECDSA) to the list of known hosts. 2023/06/21 00:38:30 fuzzer started 2023/06/21 00:38:30 dialing manager at localhost:36067 2023/06/21 00:38:30 checking machine... 2023/06/21 00:38:30 checking revisions... [ 26.912479] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:38:30 testing simple program... [ 26.958214] cgroup: Unknown subsys name 'net' [ 27.005205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:38:30 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff85652b60 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8471 RDI=ffff88801a1783f4 RBP=00007f7c8c797366 RSP=ffff888016a9f630 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f7c8c797366 R13=0000000000000000 R14=ffff88801a178000 R15=0000000000000001 RIP=ffffffff814c0871 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 00007f7c8c2a4900 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=00007ffceff23000 CR3=000000000c462000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f7dfcae2df0 CR3=0000000013a9a000 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=2030333a38333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a38333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000