[ 24.592320] BUG: Bad rss-counter state mm:000000001d6f08d7 type:MM_FILEPAGES val:33 [ 24.593690] BUG: Bad rss-counter state mm:000000001d6f08d7 type:MM_ANONPAGES val:22 [ 24.629260] ================================================================== [ 24.630087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.630954] Read of size 8 at addr ffff88801b515310 by task sshd/220 [ 24.631682] [ 24.631883] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.632790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.633711] Call Trace: [ 24.634011] [ 24.634275] dump_stack_lvl+0x91/0xf0 [ 24.634726] print_report+0xcc/0x620 [ 24.635188] ? __virt_addr_valid+0x102/0x340 [ 24.635733] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.636309] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.636874] kasan_report+0xbe/0xf0 [ 24.637312] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.637893] vma_interval_tree_remove+0xc75/0xec0 [ 24.638451] vma_prepare+0xc54/0x11a0 [ 24.638895] __split_vma+0x5af/0x950 [ 24.639317] ? __pfx___split_vma+0x10/0x10 [ 24.639799] ? find_held_lock+0x2c/0x110 [ 24.640279] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.640853] ? lock_is_held_type+0x9f/0x120 [ 24.641334] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.641878] ? mtree_range_walk+0x632/0x900 [ 24.642427] ? mas_walk+0x5c7/0x7c0 [ 24.642914] do_vmi_munmap+0x1f1/0x2b0 [ 24.643430] mmap_region+0x1f9/0x2660 [ 24.643945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.644413] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.645057] ? __pfx_lock_acquire+0x10/0x10 [ 24.645534] ? __pfx_mmap_region+0x10/0x10 [ 24.646012] ? security_mmap_addr+0x7d/0xa0 [ 24.646491] ? get_unmapped_area+0x1f5/0x3f0 [ 24.646981] do_mmap+0x854/0xf00 [ 24.647372] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.647830] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.648336] ksys_mmap_pgoff+0x3af/0x500 [ 24.648791] do_syscall_64+0x3f/0x90 [ 24.649217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.649795] RIP: 0033:0x7f798dfbdd82 [ 24.650204] 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 [ 24.652133] RSP: 002b:00007fffc8468998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.652953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f798dfbdd82 [ 24.653719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f798d3f7000 [ 24.654488] RBP: 00007f798d3f7000 R08: 0000000000000009 R09: 0000000000001000 [ 24.655246] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed15de1b20 [ 24.656026] R13: 00007fffc84689b0 R14: 00007fffc84689e0 R15: 00007fffc8468d40 [ 24.656806] [ 24.657071] [ 24.657268] Allocated by task 212: [ 24.657662] kasan_save_stack+0x22/0x50 [ 24.658125] kasan_set_track+0x25/0x30 [ 24.658573] __kasan_slab_alloc+0x59/0x70 [ 24.659049] kmem_cache_alloc+0x16b/0x370 [ 24.659517] vm_area_dup+0x20/0x160 [ 24.659935] __split_vma+0x170/0x950 [ 24.660351] split_vma+0xc6/0x110 [ 24.660748] mprotect_fixup+0x8d2/0xb30 [ 24.661201] do_mprotect_pkey+0x87e/0xd40 [ 24.661674] __x64_sys_mprotect+0x78/0xc0 [ 24.662142] do_syscall_64+0x3f/0x90 [ 24.662561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.663131] [ 24.663322] Freed by task 212: [ 24.663681] kasan_save_stack+0x22/0x50 [ 24.664131] kasan_set_track+0x25/0x30 [ 24.664568] kasan_save_free_info+0x2b/0x50 [ 24.665038] __kasan_slab_free+0x10a/0x190 [ 24.665515] kmem_cache_free+0x10d/0x4d0 [ 24.665972] rcu_core+0x8c8/0x2860 [ 24.666366] __do_softirq+0x1b7/0x7d4 [ 24.666787] [ 24.666976] Last potentially related work creation: [ 24.667492] kasan_save_stack+0x22/0x50 [ 24.667966] __kasan_record_aux_stack+0x8e/0xa0 [ 24.668479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.669058] remove_vma+0x139/0x170 [ 24.669527] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.670049] do_vmi_munmap+0x1f1/0x2b0 [ 24.670507] __vm_munmap+0x138/0x3a0 [ 24.670945] __x64_sys_munmap+0x59/0x80 [ 24.671407] do_syscall_64+0x3f/0x90 [ 24.671853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.672449] [ 24.672651] The buggy address belongs to the object at ffff88801b5152b8 [ 24.672651] which belongs to the cache vm_area_struct of size 168 [ 24.674027] The buggy address is located 88 bytes inside of [ 24.674027] freed 168-byte region [ffff88801b5152b8, ffff88801b515360) [ 24.675398] [ 24.675619] The buggy address belongs to the physical page: [ 24.676233] page:000000009606cc01 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b515 [ 24.677263] memcg:ffff88801b4e9701 [ 24.677665] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.678262] page_type: 0xffffffff() [ 24.678682] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.679555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b4e9701 [ 24.680399] page dumped because: kasan: bad access detected [ 24.681018] [ 24.681216] Memory state around the buggy address: [ 24.681766] ffff88801b515200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.682567] ffff88801b515280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.683371] >ffff88801b515300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.684182] ^ [ 24.684606] ffff88801b515380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.685406] ffff88801b515400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.686192] ================================================================== [ 24.687040] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.176745] BUG: Bad rss-counter state mm:0000000068b356b0 type:MM_FILEPAGES val:33 [ 27.178011] BUG: Bad rss-counter state mm:0000000068b356b0 type:MM_ANONPAGES val:22 [ 27.658909] BUG: Bad rss-counter state mm:000000008c01b5da type:MM_FILEPAGES val:33 [ 27.659986] BUG: Bad rss-counter state mm:000000008c01b5da type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17116' (ECDSA) to the list of known hosts. 2023/06/20 04:09:38 fuzzer started 2023/06/20 04:09:38 dialing manager at localhost:44161 2023/06/20 04:09:38 checking machine... 2023/06/20 04:09:38 checking revisions... [ 28.377129] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:09:38 testing simple program... [ 28.427138] cgroup: Unknown subsys name 'net' [ 28.478750] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:09:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888017c81b40 RSI=ffffffff83876b44 RDI=ffff888017f008c0 RBP=ffff888008f7d000 RSP=ffff88800fe37b18 R8 =0000000000000005 R9 =000000000000000f R10=0000000000000000 R11=000008c5000008c5 R12=ffff888008f7d698 R13=ffff888017f008c0 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff83874355 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 00007f81742a6900 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=00007f817485d618 CR3=0000000018c3c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000009 RBX=0000000000000009 RCX=0000000000000000 RDX=00000000000101f4 RSI=ffffffff821927d8 RDI=0000000000000007 RBP=ffff88800c4901a0 RSP=ffff8880168977a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f4 R11=0000000000000128 R12=00000000000101f4 R13=ffff88800c490050 R14=ffff88800c490048 R15=ffff88800c490060 RIP=ffffffff821927de RFL=00000093 [--S-A-C] 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=00007fff86435ba8 CR3=000000000ecba000 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=2038333a39303a3430203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383435373420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a39303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000