[ 31.496849] BUG: Bad rss-counter state mm:00000000282b7f89 type:MM_FILEPAGES val:33 [ 31.497596] BUG: Bad rss-counter state mm:00000000282b7f89 type:MM_ANONPAGES val:22 [ 31.649561] ================================================================== [ 31.650470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.651408] Read of size 8 at addr ffff88800fc99c20 by task sshd/220 [ 31.652177] [ 31.652403] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.653434] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.654408] Call Trace: [ 31.654736] [ 31.655020] dump_stack_lvl+0x91/0xf0 [ 31.655524] print_report+0xcc/0x620 [ 31.656012] ? __virt_addr_valid+0x102/0x340 [ 31.656590] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.657208] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.657826] kasan_report+0xbe/0xf0 [ 31.658307] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.658922] vma_interval_tree_remove+0xc75/0xec0 [ 31.659515] vma_prepare+0xc54/0x11a0 [ 31.659999] __split_vma+0x5af/0x950 [ 31.660481] ? __pfx___split_vma+0x10/0x10 [ 31.661012] ? find_held_lock+0x2c/0x110 [ 31.661538] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.662098] ? lock_is_held_type+0x9f/0x120 [ 31.662629] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.663229] ? mtree_range_walk+0x632/0x900 [ 31.663780] ? mas_walk+0x5c7/0x7c0 [ 31.664258] do_vmi_munmap+0x1f1/0x2b0 [ 31.664750] mmap_region+0x1f9/0x2660 [ 31.665230] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.665747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.666455] ? __pfx_lock_acquire+0x10/0x10 [ 31.666987] ? __pfx_mmap_region+0x10/0x10 [ 31.667515] ? security_mmap_addr+0x7d/0xa0 [ 31.668043] ? get_unmapped_area+0x1f5/0x3f0 [ 31.668615] do_mmap+0x854/0xf00 [ 31.669056] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.669550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.670118] ksys_mmap_pgoff+0x3af/0x500 [ 31.670621] do_syscall_64+0x3f/0x90 [ 31.671103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.671751] RIP: 0033:0x7f01746bfd82 [ 31.672209] 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 [ 31.674303] RSP: 002b:00007ffef85ec278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.675214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01746bfd82 [ 31.676065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0173af9000 [ 31.676919] RBP: 00007f0173af9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.677773] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562eb2181ec0 [ 31.678618] R13: 00007ffef85ec290 R14: 00007ffef85ec2c0 R15: 00007ffef85ec620 [ 31.679471] [ 31.679765] [ 31.679984] Allocated by task 209: [ 31.680425] kasan_save_stack+0x22/0x50 [ 31.680935] kasan_set_track+0x25/0x30 [ 31.681432] __kasan_slab_alloc+0x59/0x70 [ 31.681963] kmem_cache_alloc+0x16b/0x370 [ 31.682480] vm_area_dup+0x20/0x160 [ 31.682935] __split_vma+0x170/0x950 [ 31.683407] split_vma+0xc6/0x110 [ 31.683857] mprotect_fixup+0x8d2/0xb30 [ 31.684362] do_mprotect_pkey+0x87e/0xd40 [ 31.684875] __x64_sys_mprotect+0x78/0xc0 [ 31.685396] do_syscall_64+0x3f/0x90 [ 31.685877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.686519] [ 31.686731] Freed by task 209: [ 31.687124] kasan_save_stack+0x22/0x50 [ 31.687623] kasan_set_track+0x25/0x30 [ 31.688116] kasan_save_free_info+0x2b/0x50 [ 31.688665] __kasan_slab_free+0x10a/0x190 [ 31.689197] kmem_cache_free+0x10d/0x4d0 [ 31.689738] rcu_core+0x8c8/0x2860 [ 31.690209] __do_softirq+0x1b7/0x7d4 [ 31.690681] [ 31.690897] Last potentially related work creation: [ 31.691504] kasan_save_stack+0x22/0x50 [ 31.692111] __kasan_record_aux_stack+0x8e/0xa0 [ 31.692820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.693606] remove_vma+0x139/0x170 [ 31.694159] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.694939] do_vmi_munmap+0x1f1/0x2b0 [ 31.695525] __vm_munmap+0x138/0x3a0 [ 31.696093] __x64_sys_munmap+0x59/0x80 [ 31.696709] do_syscall_64+0x3f/0x90 [ 31.697289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.698074] [ 31.698333] Second to last potentially related work creation: [ 31.699177] kasan_save_stack+0x22/0x50 [ 31.699779] __kasan_record_aux_stack+0x8e/0xa0 [ 31.700474] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.701241] remove_vma+0x139/0x170 [ 31.701780] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.702446] do_vmi_munmap+0x1f1/0x2b0 [ 31.703026] mmap_region+0x1f9/0x2660 [ 31.703598] do_mmap+0x854/0xf00 [ 31.704113] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.704704] ksys_mmap_pgoff+0x7d/0x500 [ 31.705288] do_syscall_64+0x3f/0x90 [ 31.705858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.706633] [ 31.706888] The buggy address belongs to the object at ffff88800fc99bc8 [ 31.706888] which belongs to the cache vm_area_struct of size 168 [ 31.708689] The buggy address is located 88 bytes inside of [ 31.708689] freed 168-byte region [ffff88800fc99bc8, ffff88800fc99c70) [ 31.710406] [ 31.710671] The buggy address belongs to the physical page: [ 31.711475] page:00000000ef8f4d7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc99 [ 31.712798] memcg:ffff888009ab8301 [ 31.713314] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.714163] page_type: 0xffffffff() [ 31.714711] raw: 0100000000000200 ffff88800879fc80 ffffea00003ca0c0 dead000000000003 [ 31.715831] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ab8301 [ 31.716824] page dumped because: kasan: bad access detected [ 31.717474] [ 31.717688] Memory state around the buggy address: [ 31.718267] ffff88800fc99b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.719122] ffff88800fc99b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.719979] >ffff88800fc99c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.720834] ^ [ 31.721366] ffff88800fc99c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.722225] ffff88800fc99d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.723079] ================================================================== [ 31.724026] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.741865] BUG: Bad rss-counter state mm:000000008aac8145 type:MM_FILEPAGES val:33 [ 33.743117] BUG: Bad rss-counter state mm:000000008aac8145 type:MM_ANONPAGES val:22 [ 34.210758] BUG: Bad rss-counter state mm:00000000af10424a type:MM_FILEPAGES val:33 [ 34.212165] BUG: Bad rss-counter state mm:00000000af10424a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37778' (ECDSA) to the list of known hosts. 2023/06/19 20:20:14 fuzzer started 2023/06/19 20:20:14 dialing manager at localhost:44161 2023/06/19 20:20:14 checking machine... 2023/06/19 20:20:14 checking revisions... [ 34.926833] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:20:14 testing simple program... [ 34.979265] cgroup: Unknown subsys name 'net' [ 35.064569] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:20:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83644343 RDX=dffffc0000000000 RSI=ffffffff83644344 RDI=ffff888015b0f4e8 RBP=ffff888015b0f540 RSP=ffff888015b0f478 R8 =0000000000000001 R9 =ffff888015b0f528 R10=0000000000038001 R11=000000000008ab54 R12=ffff888015b0f548 R13=ffff888015b0f530 R14=ffff888015b0f529 R15=ffff888015b0f4e8 RIP=ffffffff8113071f RFL=00000282 [--S----] 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 00007fece4713700 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=00007f28be099000 CR3=000000000dd42000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732033313a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c8da RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e00 RDI=ffff88806cf09e00 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e08 R15=ffff88806cf09a98 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 00007f4bcc1c4900 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=00007f4bcc17d008 CR3=0000000016642000 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