[ 36.266332] BUG: Bad rss-counter state mm:000000003e319ecd type:MM_FILEPAGES val:33 [ 36.268435] BUG: Bad rss-counter state mm:000000003e319ecd type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.434641] ================================================================== [ 36.435253] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.435926] Read of size 8 at addr ffff888019a5a228 by task sshd/226 [ 36.436535] [ 36.436681] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.437250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.437950] Call Trace: [ 36.438172] [ 36.438370] dump_stack_lvl+0x91/0xf0 [ 36.438871] print_report+0xcc/0x620 [ 36.439218] ? __virt_addr_valid+0x102/0x340 [ 36.439649] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.440068] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.440587] kasan_report+0xbe/0xf0 [ 36.440907] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.441374] vma_interval_tree_remove+0xc75/0xec0 [ 36.441822] vma_prepare+0xc54/0x11a0 [ 36.442153] __split_vma+0x5af/0x950 [ 36.442475] ? __pfx___split_vma+0x10/0x10 [ 36.442888] ? find_held_lock+0x2c/0x110 [ 36.443253] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.443704] ? lock_is_held_type+0x9f/0x120 [ 36.444072] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.444552] ? mtree_range_walk+0x632/0x900 [ 36.463422] ? mas_walk+0x5c7/0x7c0 [ 36.463771] do_vmi_munmap+0x1f1/0x2b0 [ 36.464107] mmap_region+0x1f9/0x2660 [ 36.464441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.464778] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.465273] ? __pfx_lock_acquire+0x10/0x10 [ 36.465649] ? __pfx_mmap_region+0x10/0x10 [ 36.466002] ? security_mmap_addr+0x7d/0xa0 [ 36.466353] ? get_unmapped_area+0x1f5/0x3f0 [ 36.466729] do_mmap+0x854/0xf00 [ 36.467020] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.467354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.467734] ksys_mmap_pgoff+0x3af/0x500 [ 36.468087] do_syscall_64+0x3f/0x90 [ 36.468458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.468913] RIP: 0033:0x7f4b1f7ded82 [ 36.469219] 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 [ 36.470736] RSP: 002b:00007ffdc5c977b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.471388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b1f7ded82 [ 36.472006] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b1ec18000 [ 36.472651] RBP: 00007f4b1ec18000 R08: 0000000000000009 R09: 0000000000001000 [ 36.473257] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bbb2368ec0 [ 36.473881] R13: 00007ffdc5c977d0 R14: 00007ffdc5c97800 R15: 00007ffdc5c97b60 [ 36.474513] [ 36.474725] [ 36.474875] Allocated by task 218: [ 36.475156] kasan_save_stack+0x22/0x50 [ 36.475493] kasan_set_track+0x25/0x30 [ 36.475825] __kasan_slab_alloc+0x59/0x70 [ 36.476300] kmem_cache_alloc+0x16b/0x370 [ 36.477270] vm_area_dup+0x20/0x160 [ 36.478146] __split_vma+0x170/0x950 [ 36.479014] split_vma+0xc6/0x110 [ 36.479806] mprotect_fixup+0x8d2/0xb30 [ 36.480712] do_mprotect_pkey+0x87e/0xd40 [ 36.481737] __x64_sys_mprotect+0x78/0xc0 [ 36.482788] do_syscall_64+0x3f/0x90 [ 36.483712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.484461] [ 36.484601] Freed by task 204: [ 36.484863] kasan_save_stack+0x22/0x50 [ 36.485197] kasan_set_track+0x25/0x30 [ 36.485518] kasan_save_free_info+0x2b/0x50 [ 36.485870] __kasan_slab_free+0x10a/0x190 [ 36.486218] kmem_cache_free+0x10d/0x4d0 [ 36.486558] rcu_core+0x8c8/0x2860 [ 36.486849] __do_softirq+0x1b7/0x7d4 [ 36.487157] [ 36.487298] Last potentially related work creation: [ 36.487684] kasan_save_stack+0x22/0x50 [ 36.488028] __kasan_record_aux_stack+0x8e/0xa0 [ 36.488463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.488906] remove_vma+0x139/0x170 [ 36.489220] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.489596] do_vmi_munmap+0x1f1/0x2b0 [ 36.489929] __vm_munmap+0x138/0x3a0 [ 36.490248] __x64_sys_munmap+0x59/0x80 [ 36.490589] do_syscall_64+0x3f/0x90 [ 36.490914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.491350] [ 36.491498] Second to last potentially related work creation: [ 36.491953] kasan_save_stack+0x22/0x50 [ 36.492343] __kasan_record_aux_stack+0x8e/0xa0 [ 36.492729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.493167] remove_vma+0x139/0x170 [ 36.493484] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.493877] do_vmi_munmap+0x1f1/0x2b0 [ 36.494215] __vm_munmap+0x138/0x3a0 [ 36.494541] __x64_sys_munmap+0x59/0x80 [ 36.494887] do_syscall_64+0x3f/0x90 [ 36.495214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.495649] [ 36.495796] The buggy address belongs to the object at ffff888019a5a1d0 [ 36.495796] which belongs to the cache vm_area_struct of size 168 [ 36.496813] The buggy address is located 88 bytes inside of [ 36.496813] freed 168-byte region [ffff888019a5a1d0, ffff888019a5a278) [ 36.497779] [ 36.497934] The buggy address belongs to the physical page: [ 36.498391] page:00000000f6aa7f06 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a5a [ 36.499134] memcg:ffff88800d99e301 [ 36.499426] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.499898] page_type: 0xffffffff() [ 36.500228] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 36.500852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d99e301 [ 36.501472] page dumped because: kasan: bad access detected [ 36.501927] [ 36.502079] Memory state around the buggy address: [ 36.502490] ffff888019a5a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.503076] ffff888019a5a180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 36.503663] >ffff888019a5a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 36.504288] ^ [ 36.504660] ffff888019a5a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.505230] ffff888019a5a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.505816] ================================================================== [ 36.506666] Disabling lock debugging due to kernel taint [ 38.503393] BUG: Bad rss-counter state mm:00000000dd5a3555 type:MM_FILEPAGES val:33 [ 38.504102] BUG: Bad rss-counter state mm:00000000dd5a3555 type:MM_ANONPAGES val:22 [ 38.968146] BUG: Bad rss-counter state mm:00000000ae848b8c type:MM_FILEPAGES val:33 [ 38.968839] BUG: Bad rss-counter state mm:00000000ae848b8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61598' (ECDSA) to the list of known hosts. 2023/06/21 00:11:09 fuzzer started 2023/06/21 00:11:09 dialing manager at localhost:36067 2023/06/21 00:11:09 checking machine... 2023/06/21 00:11:09 checking revisions... [ 39.650589] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:11:09 testing simple program... [ 39.695742] cgroup: Unknown subsys name 'net' [ 39.751862] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:11:08 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc09 RBX=ffffffff85dfe048 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88800fce77b0 R8 =ffffffff86138eb0 R9 =ffff88800fce78a8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe060 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f090150b900 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=00007f7232979890 CR3=000000000eefa000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=1ffff1100d9e133f RSI=ffffffff8118ddc3 RDI=ffff88806cf099b0 RBP=ffff88806cf09a08 RSP=ffff88806cf09940 R8 =0000000000000001 R9 =ffff88806cf099f0 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09a78 R13=ffff88806cf099f8 R14=ffff88800fd88000 R15=ffff88806cf099b0 RIP=ffffffff81130653 RFL=00000246 [---Z-P-] 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 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=00007fd114d51328 CR3=0000000018da0000 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