[ 44.154621] BUG: Bad rss-counter state mm:0000000080030599 type:MM_FILEPAGES val:33 [ 44.155854] BUG: Bad rss-counter state mm:0000000080030599 type:MM_ANONPAGES val:22 [ 44.315628] ================================================================== [ 44.316669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.317606] Read of size 8 at addr ffff88800ea01df0 by task sshd/220 [ 44.318537] [ 44.318770] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.319643] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.320640] Call Trace: [ 44.320965] [ 44.321252] dump_stack_lvl+0x91/0xf0 [ 44.321740] print_report+0xcc/0x620 [ 44.322224] ? __virt_addr_valid+0x102/0x340 [ 44.322781] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.323426] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.324048] kasan_report+0xbe/0xf0 [ 44.324521] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.325144] vma_interval_tree_remove+0xc75/0xec0 [ 44.325751] vma_prepare+0xc54/0x11a0 [ 44.326233] __split_vma+0x5af/0x950 [ 44.326708] ? __pfx___split_vma+0x10/0x10 [ 44.327236] ? find_held_lock+0x2c/0x110 [ 44.327765] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.328339] ? lock_is_held_type+0x9f/0x120 [ 44.328885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.329492] ? mtree_range_walk+0x632/0x900 [ 44.330043] ? mas_walk+0x5c7/0x7c0 [ 44.330519] do_vmi_munmap+0x1f1/0x2b0 [ 44.331012] mmap_region+0x1f9/0x2660 [ 44.331509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.332018] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.332730] ? __pfx_lock_acquire+0x10/0x10 [ 44.333267] ? __pfx_mmap_region+0x10/0x10 [ 44.333798] ? security_mmap_addr+0x7d/0xa0 [ 44.334337] ? get_unmapped_area+0x1f5/0x3f0 [ 44.334891] do_mmap+0x854/0xf00 [ 44.335333] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.335852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.336416] ksys_mmap_pgoff+0x3af/0x500 [ 44.336932] do_syscall_64+0x3f/0x90 [ 44.337410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.338064] RIP: 0033:0x7f0c3413dd82 [ 44.338526] 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 [ 44.340681] RSP: 002b:00007fff8e72f198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.341593] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c3413dd82 [ 44.342450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c33577000 [ 44.343300] RBP: 00007f0c33577000 R08: 0000000000000009 R09: 0000000000001000 [ 44.344190] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d48620ec0 [ 44.345107] R13: 00007fff8e72f1b0 R14: 00007fff8e72f1e0 R15: 00007fff8e72f540 [ 44.346029] [ 44.346342] [ 44.346573] Allocated by task 213: [ 44.347030] kasan_save_stack+0x22/0x50 [ 44.347581] kasan_set_track+0x25/0x30 [ 44.348112] __kasan_slab_alloc+0x59/0x70 [ 44.348668] kmem_cache_alloc+0x16b/0x370 [ 44.349208] vm_area_dup+0x20/0x160 [ 44.349688] __split_vma+0x170/0x950 [ 44.350181] split_vma+0xc6/0x110 [ 44.350657] mprotect_fixup+0x8d2/0xb30 [ 44.351189] do_mprotect_pkey+0x87e/0xd40 [ 44.351772] __x64_sys_mprotect+0x78/0xc0 [ 44.352324] do_syscall_64+0x3f/0x90 [ 44.352826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.353526] [ 44.353753] Freed by task 213: [ 44.354165] kasan_save_stack+0x22/0x50 [ 44.354690] kasan_set_track+0x25/0x30 [ 44.355209] kasan_save_free_info+0x2b/0x50 [ 44.355786] __kasan_slab_free+0x10a/0x190 [ 44.356361] kmem_cache_free+0x10d/0x4d0 [ 44.356905] rcu_core+0x8c8/0x2860 [ 44.357375] __do_softirq+0x1b7/0x7d4 [ 44.357891] [ 44.358124] Last potentially related work creation: [ 44.358769] kasan_save_stack+0x22/0x50 [ 44.359301] __kasan_record_aux_stack+0x8e/0xa0 [ 44.359918] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.360590] remove_vma+0x139/0x170 [ 44.361068] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.361653] do_vmi_munmap+0x1f1/0x2b0 [ 44.362168] __vm_munmap+0x138/0x3a0 [ 44.362658] __x64_sys_munmap+0x59/0x80 [ 44.363182] do_syscall_64+0x3f/0x90 [ 44.363688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.364361] [ 44.364584] Second to last potentially related work creation: [ 44.365303] kasan_save_stack+0x22/0x50 [ 44.365834] __kasan_record_aux_stack+0x8e/0xa0 [ 44.366431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.367100] remove_vma+0x139/0x170 [ 44.367570] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.368153] do_vmi_munmap+0x1f1/0x2b0 [ 44.368661] mmap_region+0x1f9/0x2660 [ 44.369159] do_mmap+0x854/0xf00 [ 44.369601] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.370109] ksys_mmap_pgoff+0x3af/0x500 [ 44.370634] do_syscall_64+0x3f/0x90 [ 44.371124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.371815] [ 44.372038] The buggy address belongs to the object at ffff88800ea01d98 [ 44.372038] which belongs to the cache vm_area_struct of size 168 [ 44.373553] The buggy address is located 88 bytes inside of [ 44.373553] freed 168-byte region [ffff88800ea01d98, ffff88800ea01e40) [ 44.375014] [ 44.375244] The buggy address belongs to the physical page: [ 44.375949] page:000000006d3ce062 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea01 [ 44.377062] memcg:ffff88800e54d001 [ 44.377504] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.378160] page_type: 0xffffffff() [ 44.378624] raw: 0100000000000200 ffff88800879fc80 ffffea0000367dc0 dead000000000008 [ 44.379575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e54d001 [ 44.380507] page dumped because: kasan: bad access detected [ 44.381188] [ 44.381416] Memory state around the buggy address: [ 44.382019] ffff88800ea01c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 44.382903] ffff88800ea01d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 44.383809] >ffff88800ea01d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 44.384697] ^ [ 44.385541] ffff88800ea01e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 44.386440] ffff88800ea01e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.387336] ================================================================== Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.389273] Disabling lock debugging due to kernel taint [ 45.917969] BUG: Bad rss-counter state mm:000000002616e802 type:MM_FILEPAGES val:33 [ 45.918744] BUG: Bad rss-counter state mm:000000002616e802 type:MM_ANONPAGES val:22 [ 46.322865] BUG: Bad rss-counter state mm:0000000010d61aef type:MM_FILEPAGES val:33 [ 46.323647] BUG: Bad rss-counter state mm:0000000010d61aef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59199' (ECDSA) to the list of known hosts. 2023/06/20 05:10:58 fuzzer started 2023/06/20 05:10:58 dialing manager at localhost:44161 2023/06/20 05:10:58 checking machine... 2023/06/20 05:10:58 checking revisions... [ 46.981962] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:10:58 testing simple program... [ 47.044718] cgroup: Unknown subsys name 'net' [ 47.098698] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:10:37 Registers: info registers vcpu 0 RAX=1ffff11001cc24ab RBX=ffff88800e612528 RCX=ffffffff84530871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e612558 RBP=ffff88800ffaf7e8 RSP=ffff88806ce09da8 R8 =0000000000000001 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800ffb3680 R14=ffffffff8117fdd9 R15=ffff8880094b1500 RIP=ffffffff81846362 RFL=00000046 [---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 00007f1428d5a900 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=00007f14293120b0 CR3=000000000f10a000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005600746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=0000000000000001 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=00007f84a5237fd0 CR3=000000000f03a000 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=6d4d97db141924a3274fd31d732b18f1 XMM02=2c67c8bc2e329bc3000000000011c6b0 XMM03=fb795ef6d65770560000000000123538 XMM04=893520dbd50a953300000000000ae988 XMM05=19e9129bd510f2350000000000134168 XMM06=54bd0eb5696828950000000000132bd8 XMM07=e042d86d42eb936e0000000000123810 XMM08=fb2474152d5f07a6000000000011c710 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000