[ 23.599988] BUG: Bad rss-counter state mm:000000006c190bd1 type:MM_FILEPAGES val:33 [ 23.600983] BUG: Bad rss-counter state mm:000000006c190bd1 type:MM_ANONPAGES val:22 [ 23.748470] ================================================================== [ 23.749374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.750321] Read of size 8 at addr ffff88800e1786b0 by task sshd/221 [ 23.751091] [ 23.751306] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.752327] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.753292] Call Trace: [ 23.753611] [ 23.753894] dump_stack_lvl+0x91/0xf0 [ 23.754413] print_report+0xcc/0x620 [ 23.754899] ? __virt_addr_valid+0x102/0x340 [ 23.755453] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.756068] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.756684] kasan_report+0xbe/0xf0 [ 23.757163] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.757783] vma_interval_tree_remove+0xc75/0xec0 [ 23.758391] vma_prepare+0xc54/0x11a0 [ 23.758864] __split_vma+0x5af/0x950 [ 23.759335] ? __pfx___split_vma+0x10/0x10 [ 23.759873] ? find_held_lock+0x2c/0x110 [ 23.760395] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.760961] ? lock_is_held_type+0x9f/0x120 [ 23.761496] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.762102] ? mtree_range_walk+0x632/0x900 [ 23.762655] ? mas_walk+0x5c7/0x7c0 [ 23.763132] do_vmi_munmap+0x1f1/0x2b0 [ 23.763653] mmap_region+0x1f9/0x2660 [ 23.764136] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.764646] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.765353] ? __pfx_lock_acquire+0x10/0x10 [ 23.765887] ? __pfx_mmap_region+0x10/0x10 [ 23.766412] ? security_mmap_addr+0x7d/0xa0 [ 23.766938] ? get_unmapped_area+0x1f5/0x3f0 [ 23.767498] do_mmap+0x854/0xf00 [ 23.767939] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.768434] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.769001] ksys_mmap_pgoff+0x3af/0x500 [ 23.769508] do_syscall_64+0x3f/0x90 [ 23.769986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.770637] RIP: 0033:0x7fcddf1cfd82 [ 23.771098] 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 [ 23.773231] RSP: 002b:00007ffd0a973b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.774136] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcddf1cfd82 [ 23.774971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdde609000 [ 23.775827] RBP: 00007fcdde609000 R08: 0000000000000009 R09: 0000000000001000 [ 23.776679] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590a889aec0 [ 23.777519] R13: 00007ffd0a973b80 R14: 00007ffd0a973bb0 R15: 00007ffd0a973f10 [ 23.778366] [ 23.778655] [ 23.778869] Allocated by task 214: [ 23.779298] kasan_save_stack+0x22/0x50 [ 23.779815] kasan_set_track+0x25/0x30 [ 23.780307] __kasan_slab_alloc+0x59/0x70 [ 23.780828] kmem_cache_alloc+0x16b/0x370 [ 23.781342] vm_area_dup+0x20/0x160 [ 23.781792] __split_vma+0x170/0x950 [ 23.782256] split_vma+0xc6/0x110 [ 23.782695] mprotect_fixup+0x8d2/0xb30 [ 23.783203] do_mprotect_pkey+0x87e/0xd40 [ 23.783743] __x64_sys_mprotect+0x78/0xc0 [ 23.784269] do_syscall_64+0x3f/0x90 [ 23.784740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.785390] [ 23.785603] Freed by task 19: [ 23.785990] kasan_save_stack+0x22/0x50 [ 23.786490] kasan_set_track+0x25/0x30 [ 23.786993] kasan_save_free_info+0x2b/0x50 [ 23.787531] __kasan_slab_free+0x10a/0x190 [ 23.788061] kmem_cache_free+0x10d/0x4d0 [ 23.788572] rcu_core+0x8c8/0x2860 [ 23.789017] __do_softirq+0x1b7/0x7d4 [ 23.789491] [ 23.789702] Last potentially related work creation: [ 23.790293] kasan_save_stack+0x22/0x50 [ 23.790799] __kasan_record_aux_stack+0x8e/0xa0 [ 23.791401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.792045] remove_vma+0x139/0x170 [ 23.792495] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.793059] do_vmi_munmap+0x1f1/0x2b0 [ 23.793548] __vm_munmap+0x138/0x3a0 [ 23.794021] __x64_sys_munmap+0x59/0x80 [ 23.794514] do_syscall_64+0x3f/0x90 [ 23.794989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.795635] [ 23.795850] Second to last potentially related work creation: [ 23.796538] kasan_save_stack+0x22/0x50 [ 23.797037] __kasan_record_aux_stack+0x8e/0xa0 [ 23.797614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.798263] remove_vma+0x139/0x170 [ 23.798720] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.799282] do_vmi_munmap+0x1f1/0x2b0 [ 23.799775] mmap_region+0x1f9/0x2660 [ 23.800252] do_mmap+0x854/0xf00 [ 23.800684] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.801171] ksys_mmap_pgoff+0x3af/0x500 [ 23.801671] do_syscall_64+0x3f/0x90 [ 23.802153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.802793] [ 23.803010] The buggy address belongs to the object at ffff88800e178658 [ 23.803010] which belongs to the cache vm_area_struct of size 168 [ 23.804507] The buggy address is located 88 bytes inside of [ 23.804507] freed 168-byte region [ffff88800e178658, ffff88800e178700) [ 23.805912] [ 23.806128] The buggy address belongs to the physical page: [ 23.806782] page:000000007a2a71fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe178 [ 23.807877] memcg:ffff88800dd3f701 [ 23.808307] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.809013] page_type: 0xffffffff() [ 23.809463] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.810388] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd3f701 [ 23.811296] page dumped because: kasan: bad access detected [ 23.811969] [ 23.812183] Memory state around the buggy address: [ 23.812759] ffff88800e178580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.813607] ffff88800e178600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.814462] >ffff88800e178680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.815317] ^ [ 23.815908] ffff88800e178700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.816781] ffff88800e178780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.817646] ================================================================== [ 23.818631] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.440197] BUG: Bad rss-counter state mm:000000009924a401 type:MM_FILEPAGES val:33 [ 25.440774] BUG: Bad rss-counter state mm:000000009924a401 type:MM_ANONPAGES val:22 [ 25.785733] BUG: Bad rss-counter state mm:000000003a989788 type:MM_FILEPAGES val:33 [ 25.786324] BUG: Bad rss-counter state mm:000000003a989788 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17630' (ECDSA) to the list of known hosts. 2023/06/21 05:10:36 fuzzer started 2023/06/21 05:10:36 dialing manager at localhost:36067 2023/06/21 05:10:36 checking machine... 2023/06/21 05:10:36 checking revisions... [ 26.348744] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:10:37 testing simple program... [ 26.378137] cgroup: Unknown subsys name 'net' [ 26.408152] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:10:36 Registers: info registers vcpu 0 RAX=ffffffff85408001 RBX=ffffffff85407f08 RCX=ffffffff864bd701 RDX=ffffffff85407f10 RSI=0000000000000000 RDI=ffff88806ce09aa8 RBP=ffffffff85400000 RSP=ffff88806ce09a28 R8 =ffffffff864bd7f0 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f08 R15=ffff88806ce09a98 RIP=ffffffff81131cd2 RFL=00000287 [--S--PC] 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 0000000000000000 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=00007f82ccd52990 CR3=000000000e00e000 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=2036333a30313a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a30313a3530203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8613f6a5 RBX=0000000000000001 RCX=ffffffff8613f6a2 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8613f6a4 RBP=ffff8880167beff0 RSP=ffff8880167bef28 R8 =0000000000000001 R9 =ffff8880167befd8 R10=0000000000038001 R11=0000000000021ee8 R12=ffff8880167beff8 R13=ffff8880167befe0 R14=ffff8880167bf3d8 R15=ffff8880167bef98 RIP=ffffffff811311e5 RFL=00000297 [--S-APC] 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 00007fe0e33ad900 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=000055cbbedabb88 CR3=0000000009702000 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