[ 23.672046] BUG: Bad rss-counter state mm:0000000084d4e3f5 type:MM_FILEPAGES val:33 [ 23.673513] BUG: Bad rss-counter state mm:0000000084d4e3f5 type:MM_ANONPAGES val:22 [ 23.817360] ================================================================== [ 23.818266] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.819216] Read of size 8 at addr ffff88800c66a140 by task sshd/219 [ 23.819993] [ 23.820217] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.821181] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.822151] Call Trace: [ 23.822473] [ 23.822762] dump_stack_lvl+0x91/0xf0 [ 23.823253] print_report+0xcc/0x620 [ 23.823799] ? __virt_addr_valid+0x102/0x340 [ 23.824427] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.825114] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.825808] kasan_report+0xbe/0xf0 [ 23.826333] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.827042] vma_interval_tree_remove+0xc75/0xec0 [ 23.827716] vma_prepare+0xc54/0x11a0 [ 23.828261] __split_vma+0x5af/0x950 [ 23.828783] ? __pfx___split_vma+0x10/0x10 [ 23.829379] ? find_held_lock+0x2c/0x110 [ 23.829954] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.830586] ? lock_is_held_type+0x9f/0x120 [ 23.831187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.831859] ? mtree_range_walk+0x632/0x900 [ 23.832525] ? mas_walk+0x5c7/0x7c0 [ 23.833053] do_vmi_munmap+0x1f1/0x2b0 [ 23.833607] mmap_region+0x1f9/0x2660 [ 23.834139] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.834706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.835494] ? __pfx_lock_acquire+0x10/0x10 [ 23.836091] ? __pfx_mmap_region+0x10/0x10 [ 23.836683] ? security_mmap_addr+0x7d/0xa0 [ 23.837276] ? get_unmapped_area+0x1f5/0x3f0 [ 23.837896] do_mmap+0x854/0xf00 [ 23.838381] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.838933] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.839559] ksys_mmap_pgoff+0x3af/0x500 [ 23.840138] do_syscall_64+0x3f/0x90 [ 23.840675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.841394] RIP: 0033:0x7fa316ef5d82 [ 23.841920] 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 [ 23.844386] RSP: 002b:00007ffd5f30c3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.845442] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa316ef5d82 [ 23.846438] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa31632f000 [ 23.847424] RBP: 00007fa31632f000 R08: 0000000000000009 R09: 0000000000001000 [ 23.848420] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac73c81f70 [ 23.849415] R13: 00007ffd5f30c400 R14: 00007ffd5f30c430 R15: 00007ffd5f30c790 [ 23.850410] [ 23.850747] [ 23.850999] Allocated by task 212: [ 23.851494] kasan_save_stack+0x22/0x50 [ 23.852093] kasan_set_track+0x25/0x30 [ 23.852669] __kasan_slab_alloc+0x59/0x70 [ 23.853272] kmem_cache_alloc+0x16b/0x370 [ 23.853869] vm_area_dup+0x20/0x160 [ 23.854391] __split_vma+0x170/0x950 [ 23.854931] split_vma+0xc6/0x110 [ 23.855439] mprotect_fixup+0x8d2/0xb30 [ 23.856022] do_mprotect_pkey+0x87e/0xd40 [ 23.856639] __x64_sys_mprotect+0x78/0xc0 [ 23.857248] do_syscall_64+0x3f/0x90 [ 23.857799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.858550] [ 23.858797] Freed by task 212: [ 23.859251] kasan_save_stack+0x22/0x50 [ 23.859833] kasan_set_track+0x25/0x30 [ 23.860434] kasan_save_free_info+0x2b/0x50 [ 23.861049] __kasan_slab_free+0x10a/0x190 [ 23.861667] kmem_cache_free+0x10d/0x4d0 [ 23.862255] rcu_core+0x8c8/0x2860 [ 23.862773] __do_softirq+0x1b7/0x7d4 [ 23.863326] [ 23.863572] Last potentially related work creation: [ 23.864256] kasan_save_stack+0x22/0x50 [ 23.864851] __kasan_record_aux_stack+0x8e/0xa0 [ 23.865518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.866261] remove_vma+0x139/0x170 [ 23.866782] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.867424] do_vmi_munmap+0x1f1/0x2b0 [ 23.867989] __vm_munmap+0x138/0x3a0 [ 23.868533] __x64_sys_munmap+0x59/0x80 [ 23.869244] do_syscall_64+0x3f/0x90 [ 23.869960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.870931] [ 23.871264] The buggy address belongs to the object at ffff88800c66a0e8 [ 23.871264] which belongs to the cache vm_area_struct of size 168 [ 23.873581] The buggy address is located 88 bytes inside of [ 23.873581] freed 168-byte region [ffff88800c66a0e8, ffff88800c66a190) [ 23.875823] [ 23.876167] The buggy address belongs to the physical page: [ 23.877188] page:00000000873f6053 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc66a [ 23.878481] memcg:ffff8880182a8c01 [ 23.879105] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.879969] page_type: 0xffffffff() [ 23.880524] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.881596] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182a8c01 [ 23.882687] page dumped because: kasan: bad access detected [ 23.883699] [ 23.883953] Memory state around the buggy address: [ 23.884630] ffff88800c66a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.885638] ffff88800c66a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 23.886671] >ffff88800c66a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.887724] ^ [ 23.888473] ffff88800c66a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.889482] ffff88800c66a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.890465] ================================================================== [ 23.891778] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.928037] BUG: Bad rss-counter state mm:00000000c44512f8 type:MM_FILEPAGES val:33 [ 25.929211] BUG: Bad rss-counter state mm:00000000c44512f8 type:MM_ANONPAGES val:22 [ 26.445120] BUG: Bad rss-counter state mm:0000000065b25668 type:MM_FILEPAGES val:33 [ 26.446290] BUG: Bad rss-counter state mm:0000000065b25668 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64411' (ECDSA) to the list of known hosts. 2023/06/21 06:06:22 fuzzer started 2023/06/21 06:06:23 dialing manager at localhost:36067 2023/06/21 06:06:23 checking machine... 2023/06/21 06:06:23 checking revisions... [ 27.160898] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:06:23 testing simple program... [ 27.234178] cgroup: Unknown subsys name 'net' [ 27.275330] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:06:22 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015aaf648 RCX=0000000000000001 RDX=1ffff11002b55edb RSI=ffffffff8366b8df RDI=ffff888015aaf654 RBP=ffff888015aaf6d8 RSP=ffff888015aaf560 R8 =0000000000000001 R9 =ffff888015aaf5c0 R10=0000000000038001 R11=0000000000020cbd R12=ffff888015aaf648 R13=0000000000000000 R14=ffff88801654b680 R15=ffff88800dafcd00 RIP=ffffffff813ad547 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 00007f04c6fe6700 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=00007f267ca0a618 CR3=0000000009552000 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=3a5d3832325b646873732032323a3630 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343036 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=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015943680 RSI=0000000000000008 RDI=ffffffff8560b640 RBP=1ffff11003950e3a RSP=ffff88801ca871c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=0000000000092800 RIP=ffffffff812d86d9 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 00007fe5c6810900 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=00007fe5c67df008 CR3=0000000019a3e000 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