[ 23.952954] BUG: Bad rss-counter state mm:000000006dcf922e type:MM_FILEPAGES val:33 [ 23.954116] BUG: Bad rss-counter state mm:000000006dcf922e type:MM_ANONPAGES val:22 [ 24.094518] ================================================================== [ 24.095427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.096365] Read of size 8 at addr ffff88800d5ed6b0 by task sshd/220 [ 24.097124] [ 24.097339] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.098253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.099211] Call Trace: [ 24.099572] [ 24.099858] dump_stack_lvl+0x91/0xf0 [ 24.100344] print_report+0xcc/0x620 [ 24.100819] ? __virt_addr_valid+0x102/0x340 [ 24.101362] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101973] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.102586] kasan_report+0xbe/0xf0 [ 24.103056] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.103683] vma_interval_tree_remove+0xc75/0xec0 [ 24.104284] vma_prepare+0xc54/0x11a0 [ 24.104752] __split_vma+0x5af/0x950 [ 24.105213] ? __pfx___split_vma+0x10/0x10 [ 24.105730] ? find_held_lock+0x2c/0x110 [ 24.106240] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.106792] ? lock_is_held_type+0x9f/0x120 [ 24.107318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.107930] ? mtree_range_walk+0x632/0x900 [ 24.108473] ? mas_walk+0x5c7/0x7c0 [ 24.108942] do_vmi_munmap+0x1f1/0x2b0 [ 24.109429] mmap_region+0x1f9/0x2660 [ 24.109906] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.110408] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.111142] ? __pfx_lock_acquire+0x10/0x10 [ 24.111688] ? __pfx_mmap_region+0x10/0x10 [ 24.112215] ? security_mmap_addr+0x7d/0xa0 [ 24.112733] ? get_unmapped_area+0x1f5/0x3f0 [ 24.113273] do_mmap+0x854/0xf00 [ 24.113705] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.114193] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.114742] ksys_mmap_pgoff+0x3af/0x500 [ 24.115240] do_syscall_64+0x3f/0x90 [ 24.115728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.116370] RIP: 0033:0x7f34d7057d82 [ 24.116825] 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 [ 24.118911] RSP: 002b:00007ffda18b9e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.119812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34d7057d82 [ 24.120656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34d6491000 [ 24.121489] RBP: 00007f34d6491000 R08: 0000000000000009 R09: 0000000000001000 [ 24.122324] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0e15d9f70 [ 24.123159] R13: 00007ffda18b9e60 R14: 00007ffda18b9e90 R15: 00007ffda18ba1f0 [ 24.124018] [ 24.124305] [ 24.124517] Allocated by task 213: [ 24.124936] kasan_save_stack+0x22/0x50 [ 24.125428] kasan_set_track+0x25/0x30 [ 24.125917] __kasan_slab_alloc+0x59/0x70 [ 24.126434] kmem_cache_alloc+0x16b/0x370 [ 24.126942] vm_area_dup+0x20/0x160 [ 24.127388] __split_vma+0x170/0x950 [ 24.127851] split_vma+0xc6/0x110 [ 24.128281] mprotect_fixup+0x8d2/0xb30 [ 24.128775] do_mprotect_pkey+0x87e/0xd40 [ 24.129285] __x64_sys_mprotect+0x78/0xc0 [ 24.129801] do_syscall_64+0x3f/0x90 [ 24.130274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.130905] [ 24.131116] Freed by task 213: [ 24.131511] kasan_save_stack+0x22/0x50 [ 24.132009] kasan_set_track+0x25/0x30 [ 24.132502] kasan_save_free_info+0x2b/0x50 [ 24.133025] __kasan_slab_free+0x10a/0x190 [ 24.133548] kmem_cache_free+0x10d/0x4d0 [ 24.134045] rcu_core+0x8c8/0x2860 [ 24.134482] __do_softirq+0x1b7/0x7d4 [ 24.134954] [ 24.135166] Last potentially related work creation: [ 24.135766] kasan_save_stack+0x22/0x50 [ 24.136279] __kasan_record_aux_stack+0x8e/0xa0 [ 24.136847] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.137495] remove_vma+0x139/0x170 [ 24.137941] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.138497] do_vmi_munmap+0x1f1/0x2b0 [ 24.138974] __vm_munmap+0x138/0x3a0 [ 24.139436] __x64_sys_munmap+0x59/0x80 [ 24.139928] do_syscall_64+0x3f/0x90 [ 24.140398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.141040] [ 24.141254] Second to last potentially related work creation: [ 24.141932] kasan_save_stack+0x22/0x50 [ 24.142427] __kasan_record_aux_stack+0x8e/0xa0 [ 24.142995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.143648] remove_vma+0x139/0x170 [ 24.144095] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.144651] do_vmi_munmap+0x1f1/0x2b0 [ 24.145131] mmap_region+0x1f9/0x2660 [ 24.145619] do_mmap+0x854/0xf00 [ 24.146041] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.146528] ksys_mmap_pgoff+0x7d/0x500 [ 24.147018] do_syscall_64+0x3f/0x90 [ 24.147496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.148138] [ 24.148354] The buggy address belongs to the object at ffff88800d5ed658 [ 24.148354] which belongs to the cache vm_area_struct of size 168 [ 24.149789] The buggy address is located 88 bytes inside of [ 24.149789] freed 168-byte region [ffff88800d5ed658, ffff88800d5ed700) [ 24.151187] [ 24.151398] The buggy address belongs to the physical page: [ 24.152072] page:00000000564a4405 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5ed [ 24.153131] memcg:ffff88800eed3301 [ 24.153568] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.154198] page_type: 0xffffffff() [ 24.154639] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.155546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eed3301 [ 24.156419] page dumped because: kasan: bad access detected [ 24.157062] [ 24.157271] Memory state around the buggy address: [ 24.157842] ffff88800d5ed580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.158686] ffff88800d5ed600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.159523] >ffff88800d5ed680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.160350] ^ [ 24.160921] ffff88800d5ed700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 24.161764] ffff88800d5ed780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.162588] ================================================================== [ 24.163748] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.167723] BUG: Bad rss-counter state mm:00000000170b92d5 type:MM_FILEPAGES val:33 [ 26.168550] BUG: Bad rss-counter state mm:00000000170b92d5 type:MM_ANONPAGES val:22 [ 26.742235] BUG: Bad rss-counter state mm:00000000cffc581e type:MM_FILEPAGES val:33 [ 26.742870] BUG: Bad rss-counter state mm:00000000cffc581e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59895' (ECDSA) to the list of known hosts. 2023/06/21 04:24:07 fuzzer started 2023/06/21 04:24:07 dialing manager at localhost:36067 2023/06/21 04:24:08 checking machine... 2023/06/21 04:24:08 checking revisions... [ 27.327847] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:24:08 testing simple program... [ 27.378825] cgroup: Unknown subsys name 'net' [ 27.467453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:24:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055e23486f540 RCX=0000000000000000 RDX=000055e234869580 RSI=0000000000000007 RDI=000055e234858350 RBP=000055e234858350 RSP=00007ffc9818b260 R8 =0000000000000007 R9 =00007ffc98184608 R10=000055e234881300 R11=0000000000000246 R12=0000000000000004 R13=0000000000000000 R14=00007ffc9818b620 R15=00007ffc9818b3d0 RIP=00007f7ade234ff1 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7add70c900 00000000 00000000 GS =0000 0000000000000000 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=000055e23485e980 CR3=000000000dcd0000 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=6720646572637465733a4d41503d706f 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 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=00007fb5716f7980 CR3=00000000165f8000 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=2037303a34323a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a34323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000