[ 30.629348] BUG: Bad rss-counter state mm:0000000068b75568 type:MM_FILEPAGES val:33 [ 30.630368] BUG: Bad rss-counter state mm:0000000068b75568 type:MM_ANONPAGES val:22 [ 30.797540] ================================================================== [ 30.798481] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.799417] Read of size 8 at addr ffff888016e144e0 by task sshd/218 [ 30.800178] [ 30.800396] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.801390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.802358] Call Trace: [ 30.802673] [ 30.802957] dump_stack_lvl+0x91/0xf0 [ 30.803454] print_report+0xcc/0x620 [ 30.803941] ? __virt_addr_valid+0x102/0x340 [ 30.804488] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.805126] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.805750] kasan_report+0xbe/0xf0 [ 30.806227] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.806844] vma_interval_tree_remove+0xc75/0xec0 [ 30.807444] vma_prepare+0xc54/0x11a0 [ 30.807925] __split_vma+0x5af/0x950 [ 30.808398] ? __pfx___split_vma+0x10/0x10 [ 30.808927] ? find_held_lock+0x2c/0x110 [ 30.809443] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.810008] ? lock_is_held_type+0x9f/0x120 [ 30.810540] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.811156] ? mtree_range_walk+0x632/0x900 [ 30.811710] ? mas_walk+0x5c7/0x7c0 [ 30.812180] do_vmi_munmap+0x1f1/0x2b0 [ 30.812671] mmap_region+0x1f9/0x2660 [ 30.813184] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.813698] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.814407] ? __pfx_lock_acquire+0x10/0x10 [ 30.814933] ? __pfx_mmap_region+0x10/0x10 [ 30.815468] ? security_mmap_addr+0x7d/0xa0 [ 30.816000] ? get_unmapped_area+0x1f5/0x3f0 [ 30.816545] do_mmap+0x854/0xf00 [ 30.817109] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.817772] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.818512] ksys_mmap_pgoff+0x3af/0x500 [ 30.819169] do_syscall_64+0x3f/0x90 [ 30.819727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820391] RIP: 0033:0x7f8505f79d82 [ 30.820892] 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 [ 30.823069] RSP: 002b:00007ffcad62a708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.824001] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8505f79d82 [ 30.824881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f85053b3000 [ 30.825734] RBP: 00007f85053b3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.826591] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557dac6d3d90 [ 30.827488] R13: 00007ffcad62a720 R14: 00007ffcad62a750 R15: 00007ffcad62aab0 [ 30.828344] [ 30.828639] [ 30.828880] Allocated by task 211: [ 30.829306] kasan_save_stack+0x22/0x50 [ 30.829807] kasan_set_track+0x25/0x30 [ 30.830301] __kasan_slab_alloc+0x59/0x70 [ 30.830825] kmem_cache_alloc+0x16b/0x370 [ 30.831345] vm_area_dup+0x20/0x160 [ 30.831794] __split_vma+0x170/0x950 [ 30.832255] split_vma+0xc6/0x110 [ 30.832697] mprotect_fixup+0x8d2/0xb30 [ 30.833221] do_mprotect_pkey+0x87e/0xd40 [ 30.833734] __x64_sys_mprotect+0x78/0xc0 [ 30.834255] do_syscall_64+0x3f/0x90 [ 30.834730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.835373] [ 30.835587] Freed by task 202: [ 30.835978] kasan_save_stack+0x22/0x50 [ 30.836478] kasan_set_track+0x25/0x30 [ 30.836985] kasan_save_free_info+0x2b/0x50 [ 30.837526] __kasan_slab_free+0x10a/0x190 [ 30.838066] kmem_cache_free+0x10d/0x4d0 [ 30.838572] rcu_core+0x8c8/0x2860 [ 30.839016] __do_softirq+0x1b7/0x7d4 [ 30.839491] [ 30.839706] Last potentially related work creation: [ 30.840291] kasan_save_stack+0x22/0x50 [ 30.840813] __kasan_record_aux_stack+0x8e/0xa0 [ 30.841387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.842022] remove_vma+0x139/0x170 [ 30.842474] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.843039] do_vmi_munmap+0x1f1/0x2b0 [ 30.843522] __vm_munmap+0x138/0x3a0 [ 30.843983] __x64_sys_munmap+0x59/0x80 [ 30.844480] do_syscall_64+0x3f/0x90 [ 30.844966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.845612] [ 30.845831] The buggy address belongs to the object at ffff888016e14488 [ 30.845831] which belongs to the cache vm_area_struct of size 168 [ 30.847300] The buggy address is located 88 bytes inside of [ 30.847300] freed 168-byte region [ffff888016e14488, ffff888016e14530) [ 30.848715] [ 30.848941] The buggy address belongs to the physical page: [ 30.849603] page:000000001e222038 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e14 [ 30.850703] memcg:ffff8880100f0101 [ 30.851127] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.851818] page_type: 0xffffffff() [ 30.852269] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.853228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880100f0101 [ 30.854142] page dumped because: kasan: bad access detected [ 30.854815] [ 30.855028] Memory state around the buggy address: [ 30.855613] ffff888016e14380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.856474] ffff888016e14400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.857340] >ffff888016e14480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.858194] ^ [ 30.858947] ffff888016e14500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.859791] ffff888016e14580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.860651] ================================================================== [ 30.861586] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.609700] BUG: Bad rss-counter state mm:00000000ebac96a1 type:MM_FILEPAGES val:33 [ 33.610775] BUG: Bad rss-counter state mm:00000000ebac96a1 type:MM_ANONPAGES val:22 [ 33.998359] BUG: Bad rss-counter state mm:00000000d32c53de type:MM_FILEPAGES val:33 [ 33.999240] BUG: Bad rss-counter state mm:00000000d32c53de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37243' (ECDSA) to the list of known hosts. 2023/06/20 11:07:10 fuzzer started 2023/06/20 11:07:10 dialing manager at localhost:36067 2023/06/20 11:07:10 checking machine... 2023/06/20 11:07:10 checking revisions... [ 34.656423] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:07:10 testing simple program... [ 34.699052] cgroup: Unknown subsys name 'net' [ 34.736627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:07:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000050 RCX=ffffffff844a504f RDX=ffff888014639b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800de6ee08 RSP=ffff8880145d7ce0 R8 =0000000000000000 R9 =000000000000000a R10=000000000000000d R11=0000000000000000 R12=000000000000000a R13=000000000000000d R14=00007fb1e64c0000 R15=00007fb1e5b8cfff RIP=ffffffff814c027c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb1e6fa2900 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=00007fb1e64c0000 CR3=000000000d636000 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=b3285ca56c489dff0000000000109d98 XMM01=d59e07bde36eea69000000000011ab08 XMM02=ec2efd57dc4c00df000000000011ac10 XMM03=9b74914a8a71622d000000000011ace0 XMM04=bf3dd630c9a2badc00000000000ae988 XMM05=d8b5e6a01b1a699f0000000000132768 XMM06=bdf2e299e47b49d50000000000131498 XMM07=e042d86d42eb936e00000000001219a0 XMM08=9b74914a8a71622d000000000011ace0 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=00007fff5fccca98 CR3=000000000de46000 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=37303a3131203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383632 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000