[ 54.250863] BUG: Bad rss-counter state mm:000000005fec3916 type:MM_FILEPAGES val:33 [ 54.252623] BUG: Bad rss-counter state mm:000000005fec3916 type:MM_ANONPAGES val:22 [ 54.316963] ================================================================== [ 54.317852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.318804] Read of size 8 at addr ffff88800e0b75c8 by task sshd/219 [ 54.319572] [ 54.319788] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.320657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.321648] Call Trace: [ 54.322072] [ 54.322490] dump_stack_lvl+0x91/0xf0 [ 54.323158] print_report+0xcc/0x620 [ 54.323810] ? __virt_addr_valid+0x102/0x340 [ 54.324569] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.325245] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.325881] kasan_report+0xbe/0xf0 [ 54.326380] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.327018] vma_interval_tree_remove+0xc75/0xec0 [ 54.327654] vma_prepare+0xc54/0x11a0 [ 54.328143] __split_vma+0x5af/0x950 [ 54.328712] ? __pfx___split_vma+0x10/0x10 [ 54.329252] ? lockdep_hardirqs_on_prepare+0x27b/0x3f0 [ 54.329893] ? asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 54.330577] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.331142] ? lock_is_held_type+0x9f/0x120 [ 54.331682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.332286] ? mtree_range_walk+0x632/0x900 [ 54.332844] ? mas_walk+0x5c7/0x7c0 [ 54.333316] do_vmi_munmap+0x1f1/0x2b0 [ 54.333806] mmap_region+0x1f9/0x2660 [ 54.334285] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.334813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.335521] ? __pfx_lock_acquire+0x10/0x10 [ 54.336055] ? __pfx_mmap_region+0x10/0x10 [ 54.336581] ? security_mmap_addr+0x7d/0xa0 [ 54.337115] ? get_unmapped_area+0x1f5/0x3f0 [ 54.337671] do_mmap+0x854/0xf00 [ 54.338108] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.338609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.339167] ksys_mmap_pgoff+0x3af/0x500 [ 54.339682] do_syscall_64+0x3f/0x90 [ 54.340161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.340803] RIP: 0033:0x7f99b80c0d82 [ 54.341261] 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 [ 54.343403] RSP: 002b:00007fffd7ee6128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.344367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99b80c0d82 [ 54.345231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99b74fa000 [ 54.346085] RBP: 00007f99b74fa000 R08: 0000000000000009 R09: 0000000000001000 [ 54.346996] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eaffdcab20 [ 54.347850] R13: 00007fffd7ee6140 R14: 00007fffd7ee6170 R15: 00007fffd7ee64d0 [ 54.348744] [ 54.349044] [ 54.349307] Allocated by task 212: [ 54.349745] kasan_save_stack+0x22/0x50 [ 54.350282] kasan_set_track+0x25/0x30 [ 54.350806] __kasan_slab_alloc+0x59/0x70 [ 54.351350] kmem_cache_alloc+0x16b/0x370 [ 54.351865] vm_area_dup+0x20/0x160 [ 54.352336] __split_vma+0x170/0x950 [ 54.352806] split_vma+0xc6/0x110 [ 54.353273] mprotect_fixup+0x8d2/0xb30 [ 54.353778] do_mprotect_pkey+0x87e/0xd40 [ 54.354331] __x64_sys_mprotect+0x78/0xc0 [ 54.354894] do_syscall_64+0x3f/0x90 [ 54.355410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.356058] [ 54.356276] Freed by task 212: [ 54.356688] kasan_save_stack+0x22/0x50 [ 54.357197] kasan_set_track+0x25/0x30 [ 54.357696] kasan_save_free_info+0x2b/0x50 [ 54.358223] __kasan_slab_free+0x10a/0x190 [ 54.358781] kmem_cache_free+0x10d/0x4d0 [ 54.359297] rcu_core+0x8c8/0x2860 [ 54.359743] __do_softirq+0x1b7/0x7d4 [ 54.360224] [ 54.360446] Last potentially related work creation: [ 54.361037] kasan_save_stack+0x22/0x50 [ 54.361537] __kasan_record_aux_stack+0x8e/0xa0 [ 54.362116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.362767] remove_vma+0x139/0x170 [ 54.363215] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.363781] do_vmi_munmap+0x1f1/0x2b0 [ 54.364272] __vm_munmap+0x138/0x3a0 [ 54.364737] __x64_sys_munmap+0x59/0x80 [ 54.365230] do_syscall_64+0x3f/0x90 [ 54.365703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.366363] [ 54.366585] Second to last potentially related work creation: [ 54.367280] kasan_save_stack+0x22/0x50 [ 54.367790] __kasan_record_aux_stack+0x8e/0xa0 [ 54.368366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.369020] remove_vma+0x139/0x170 [ 54.369477] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.370041] do_vmi_munmap+0x1f1/0x2b0 [ 54.370548] mmap_region+0x1f9/0x2660 [ 54.371035] do_mmap+0x854/0xf00 [ 54.371474] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.371967] ksys_mmap_pgoff+0x3af/0x500 [ 54.372466] do_syscall_64+0x3f/0x90 [ 54.372944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.373589] [ 54.373811] The buggy address belongs to the object at ffff88800e0b7570 [ 54.373811] which belongs to the cache vm_area_struct of size 168 [ 54.375311] The buggy address is located 88 bytes inside of [ 54.375311] freed 168-byte region [ffff88800e0b7570, ffff88800e0b7618) [ 54.376740] [ 54.376961] The buggy address belongs to the physical page: [ 54.377625] page:0000000078aadc63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b7 [ 54.378752] memcg:ffff88800cd2d301 [ 54.379201] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.379857] page_type: 0xffffffff() [ 54.380307] raw: 0100000000000200 ffff88800879fc80 ffffea0000335ac0 dead000000000002 [ 54.381233] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd2d301 [ 54.382142] page dumped because: kasan: bad access detected [ 54.382812] [ 54.383031] Memory state around the buggy address: [ 54.383611] ffff88800e0b7480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.384476] ffff88800e0b7500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 54.385345] >ffff88800e0b7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.386190] ^ [ 54.386857] ffff88800e0b7600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 54.387717] ffff88800e0b7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.388566] ================================================================== [ 54.389880] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 56.288254] BUG: Bad rss-counter state mm:00000000e34cbe05 type:MM_FILEPAGES val:33 [ 56.289188] BUG: Bad rss-counter state mm:00000000e34cbe05 type:MM_ANONPAGES val:22 [ 56.759733] BUG: Bad rss-counter state mm:0000000061b1c71b type:MM_FILEPAGES val:33 [ 56.760748] BUG: Bad rss-counter state mm:0000000061b1c71b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53676' (ECDSA) to the list of known hosts. 2023/06/20 01:29:13 fuzzer started 2023/06/20 01:29:13 dialing manager at localhost:44161 2023/06/20 01:29:13 checking machine... 2023/06/20 01:29:13 checking revisions... [ 57.566188] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:29:13 testing simple program... [ 57.619104] cgroup: Unknown subsys name 'net' [ 57.687417] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:29:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff854ee9e8 RCX=0000000000000000 RDX=ffff88800fc41b40 RSI=ffffffff814822aa RDI=ffffffff854ee9ec RBP=0000000000000000 RSP=ffff88801863fb88 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=0000000000000001 R12=0000000000000000 R13=0000000000000001 R14=dffffc0000000000 R15=00000000fffffffe RIP=ffffffff814822b8 RFL=00000293 [--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 00007fd33276f900 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=00007fffb4c70000 CR3=000000000b38a000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f6721c93aa0 CR3=0000000014510000 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=b578ef4fe473ddb66b47264827a5f3e3 XMM02=2c67c8bc2e329bc3000000000011cfb8 XMM03=fb795ef6d65770560000000000123a38 XMM04=595df6e66b32972000000000000ae988 XMM05=85f1f472540481790000000000136238 XMM06=4fda316b135da52b0000000000135008 XMM07=e042d86d42eb936e0000000000123d10 XMM08=e4b51ef4ad18ee7e000000000011d018 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000