[ 33.382553] BUG: Bad rss-counter state mm:00000000d2e07739 type:MM_FILEPAGES val:33 [ 33.384489] BUG: Bad rss-counter state mm:00000000d2e07739 type:MM_ANONPAGES val:22 [ 33.543588] ================================================================== [ 33.544520] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.545464] Read of size 8 at addr ffff88800e9604e0 by task sshd/218 [ 33.546446] [ 33.546668] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.547530] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.548534] Call Trace: [ 33.548852] [ 33.549139] dump_stack_lvl+0x91/0xf0 [ 33.549631] print_report+0xcc/0x620 [ 33.550121] ? __virt_addr_valid+0x102/0x340 [ 33.550688] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.551314] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.551939] kasan_report+0xbe/0xf0 [ 33.552420] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.553046] vma_interval_tree_remove+0xc75/0xec0 [ 33.553659] vma_prepare+0xc54/0x11a0 [ 33.554142] __split_vma+0x5af/0x950 [ 33.554653] ? __pfx___split_vma+0x10/0x10 [ 33.555183] ? find_held_lock+0x2c/0x110 [ 33.555708] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.556278] ? lock_is_held_type+0x9f/0x120 [ 33.556825] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.557446] ? mtree_range_walk+0x632/0x900 [ 33.557993] ? mas_walk+0x5c7/0x7c0 [ 33.558492] do_vmi_munmap+0x1f1/0x2b0 [ 33.558992] mmap_region+0x1f9/0x2660 [ 33.559481] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.559995] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.560740] ? __pfx_lock_acquire+0x10/0x10 [ 33.561276] ? __pfx_mmap_region+0x10/0x10 [ 33.561818] ? security_mmap_addr+0x7d/0xa0 [ 33.562369] ? get_unmapped_area+0x1f5/0x3f0 [ 33.562914] do_mmap+0x854/0xf00 [ 33.563354] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.563856] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.564427] ksys_mmap_pgoff+0x3af/0x500 [ 33.564940] do_syscall_64+0x3f/0x90 [ 33.565421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.566072] RIP: 0033:0x7fa88a079d82 [ 33.566554] 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 [ 33.568692] RSP: 002b:00007ffcbac1ea78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.569605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa88a079d82 [ 33.570478] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8894b3000 [ 33.571330] RBP: 00007fa8894b3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.572179] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0ac8a5f70 [ 33.573025] R13: 00007ffcbac1ea90 R14: 00007ffcbac1eac0 R15: 00007ffcbac1ee20 [ 33.573881] [ 33.574181] [ 33.574418] Allocated by task 211: [ 33.574849] kasan_save_stack+0x22/0x50 [ 33.575359] kasan_set_track+0x25/0x30 [ 33.575857] __kasan_slab_alloc+0x59/0x70 [ 33.576388] kmem_cache_alloc+0x16b/0x370 [ 33.576912] vm_area_dup+0x20/0x160 [ 33.577381] __split_vma+0x170/0x950 [ 33.577858] split_vma+0xc6/0x110 [ 33.578314] mprotect_fixup+0x8d2/0xb30 [ 33.578815] do_mprotect_pkey+0x87e/0xd40 [ 33.579343] __x64_sys_mprotect+0x78/0xc0 [ 33.579870] do_syscall_64+0x3f/0x90 [ 33.580350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.581010] [ 33.581233] Freed by task 211: [ 33.581628] kasan_save_stack+0x22/0x50 [ 33.582140] kasan_set_track+0x25/0x30 [ 33.582643] kasan_save_free_info+0x2b/0x50 [ 33.583188] __kasan_slab_free+0x10a/0x190 [ 33.583726] kmem_cache_free+0x10d/0x4d0 [ 33.584240] rcu_core+0x8c8/0x2860 [ 33.584694] __do_softirq+0x1b7/0x7d4 [ 33.585179] [ 33.585397] Last potentially related work creation: [ 33.586014] kasan_save_stack+0x22/0x50 [ 33.586561] __kasan_record_aux_stack+0x8e/0xa0 [ 33.587182] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.587829] remove_vma+0x139/0x170 [ 33.588288] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.588855] do_vmi_munmap+0x1f1/0x2b0 [ 33.589339] __vm_munmap+0x138/0x3a0 [ 33.589814] __x64_sys_munmap+0x59/0x80 [ 33.590325] do_syscall_64+0x3f/0x90 [ 33.590806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.591451] [ 33.591676] Second to last potentially related work creation: [ 33.592365] kasan_save_stack+0x22/0x50 [ 33.592868] __kasan_record_aux_stack+0x8e/0xa0 [ 33.593458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.594121] remove_vma+0x139/0x170 [ 33.594603] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.595163] do_vmi_munmap+0x1f1/0x2b0 [ 33.595656] __vm_munmap+0x138/0x3a0 [ 33.596126] __x64_sys_munmap+0x59/0x80 [ 33.596636] do_syscall_64+0x3f/0x90 [ 33.597111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.597767] [ 33.597982] The buggy address belongs to the object at ffff88800e960488 [ 33.597982] which belongs to the cache vm_area_struct of size 168 [ 33.599486] The buggy address is located 88 bytes inside of [ 33.599486] freed 168-byte region [ffff88800e960488, ffff88800e960530) [ 33.600901] [ 33.601121] The buggy address belongs to the physical page: [ 33.601788] page:000000000a9f591b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe960 [ 33.602884] memcg:ffff88800dc4cb01 [ 33.603313] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.603965] page_type: 0xffffffff() [ 33.604417] raw: 0100000000000200 ffff88800879fc80 ffffea000037dd80 dead000000000002 [ 33.605361] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc4cb01 [ 33.606296] page dumped because: kasan: bad access detected [ 33.606968] [ 33.607183] Memory state around the buggy address: [ 33.607771] ffff88800e960380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.608638] ffff88800e960400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.609494] >ffff88800e960480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.610365] ^ [ 33.611125] ffff88800e960500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.611990] ffff88800e960580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.612848] ================================================================== [ 33.614000] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.763733] BUG: Bad rss-counter state mm:0000000034e202e8 type:MM_FILEPAGES val:33 [ 35.764674] BUG: Bad rss-counter state mm:0000000034e202e8 type:MM_ANONPAGES val:22 [ 36.278469] BUG: Bad rss-counter state mm:00000000f9e05676 type:MM_FILEPAGES val:33 [ 36.279466] BUG: Bad rss-counter state mm:00000000f9e05676 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26249' (ECDSA) to the list of known hosts. 2023/06/20 05:55:33 fuzzer started 2023/06/20 05:55:34 dialing manager at localhost:44161 2023/06/20 05:55:34 checking machine... 2023/06/20 05:55:34 checking revisions... [ 37.026282] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:55:34 testing simple program... [ 37.080018] cgroup: Unknown subsys name 'net' [ 37.130734] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:55:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c1329 RCX=ffffffff85d3d010 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8eed 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 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=00007f15a2105900 CR3=0000000019dc8000 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=2033333a35353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a35353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11002cc3ea9 RSI=ffffffff84506c7f RDI=ffff88801661f548 RBP=ffff88801661f5e0 RSP=ffff88801661f4d8 R8 =0000000000000001 R9 =ffff88801661f588 R10=0000000000038001 R11=000000000008abed R12=ffff88801661f610 R13=0000000000000000 R14=ffff888015e1b680 R15=ffff88801661f548 RIP=ffffffff8113060b 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 00007fa807290900 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=00007fa807847618 CR3=000000001859c000 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=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