syzkaller login: [ 50.676302] BUG: Bad rss-counter state mm:00000000a94cb370 type:MM_FILEPAGES val:33 [ 50.678031] BUG: Bad rss-counter state mm:00000000a94cb370 type:MM_ANONPAGES val:22 [ 50.838742] ================================================================== [ 50.839674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.840604] Read of size 8 at addr ffff88800c5eed08 by task sshd/220 [ 50.841475] [ 50.841697] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.842564] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.843553] Call Trace: [ 50.843876] [ 50.844163] dump_stack_lvl+0x91/0xf0 [ 50.844651] print_report+0xcc/0x620 [ 50.845132] ? __virt_addr_valid+0x102/0x340 [ 50.845695] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.846335] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.846951] kasan_report+0xbe/0xf0 [ 50.847424] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.848038] vma_interval_tree_remove+0xc75/0xec0 [ 50.848635] vma_prepare+0xc54/0x11a0 [ 50.849110] __split_vma+0x5af/0x950 [ 50.849582] ? __pfx___split_vma+0x10/0x10 [ 50.850110] ? find_held_lock+0x2c/0x110 [ 50.850647] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.851219] ? lock_is_held_type+0x9f/0x120 [ 50.851766] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.852372] ? mtree_range_walk+0x632/0x900 [ 50.852926] ? mas_walk+0x5c7/0x7c0 [ 50.853405] do_vmi_munmap+0x1f1/0x2b0 [ 50.853898] mmap_region+0x1f9/0x2660 [ 50.854394] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.854912] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.855625] ? __pfx_lock_acquire+0x10/0x10 [ 50.856153] ? __pfx_mmap_region+0x10/0x10 [ 50.856690] ? security_mmap_addr+0x7d/0xa0 [ 50.857215] ? get_unmapped_area+0x1f5/0x3f0 [ 50.857776] do_mmap+0x854/0xf00 [ 50.858250] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.858741] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.859304] ksys_mmap_pgoff+0x3af/0x500 [ 50.859820] do_syscall_64+0x3f/0x90 [ 50.860311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.860955] RIP: 0033:0x7f2748fddd82 [ 50.861418] 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 [ 50.863545] RSP: 002b:00007ffc724b2bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.864449] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2748fddd82 [ 50.865287] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2748417000 [ 50.866121] RBP: 00007f2748417000 R08: 0000000000000009 R09: 0000000000001000 [ 50.866982] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d467cf9ec0 [ 50.867811] R13: 00007ffc724b2bf0 R14: 00007ffc724b2c20 R15: 00007ffc724b2f80 [ 50.868665] [ 50.868953] [ 50.869173] Allocated by task 213: [ 50.869597] kasan_save_stack+0x22/0x50 [ 50.870105] kasan_set_track+0x25/0x30 [ 50.870602] __kasan_slab_alloc+0x59/0x70 [ 50.871128] kmem_cache_alloc+0x16b/0x370 [ 50.871643] vm_area_dup+0x20/0x160 [ 50.872095] __split_vma+0x170/0x950 [ 50.872559] split_vma+0xc6/0x110 [ 50.872997] mprotect_fixup+0x8d2/0xb30 [ 50.873500] do_mprotect_pkey+0x87e/0xd40 [ 50.874027] __x64_sys_mprotect+0x78/0xc0 [ 50.874554] do_syscall_64+0x3f/0x90 [ 50.875022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.875676] [ 50.875896] Freed by task 213: [ 50.876288] kasan_save_stack+0x22/0x50 [ 50.876797] kasan_set_track+0x25/0x30 [ 50.877292] kasan_save_free_info+0x2b/0x50 [ 50.877827] __kasan_slab_free+0x10a/0x190 [ 50.878384] kmem_cache_free+0x10d/0x4d0 [ 50.878894] rcu_core+0x8c8/0x2860 [ 50.879340] __do_softirq+0x1b7/0x7d4 [ 50.879817] [ 50.880035] Last potentially related work creation: [ 50.880618] kasan_save_stack+0x22/0x50 [ 50.881124] __kasan_record_aux_stack+0x8e/0xa0 [ 50.881700] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.882368] remove_vma+0x139/0x170 [ 50.882827] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.883390] do_vmi_munmap+0x1f1/0x2b0 [ 50.883890] __vm_munmap+0x138/0x3a0 [ 50.884363] __x64_sys_munmap+0x59/0x80 [ 50.884865] do_syscall_64+0x3f/0x90 [ 50.885343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.885983] [ 50.886217] The buggy address belongs to the object at ffff88800c5eecb0 [ 50.886217] which belongs to the cache vm_area_struct of size 168 [ 50.887685] The buggy address is located 88 bytes inside of [ 50.887685] freed 168-byte region [ffff88800c5eecb0, ffff88800c5eed58) [ 50.889090] [ 50.889310] The buggy address belongs to the physical page: [ 50.889969] page:00000000245112bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5ee [ 50.891051] memcg:ffff888013ed3501 [ 50.891478] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.892129] page_type: 0xffffffff() [ 50.892582] raw: 0100000000000200 ffff88800879fc80 ffffea00003d9680 dead000000000008 [ 50.893505] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013ed3501 [ 50.894432] page dumped because: kasan: bad access detected [ 50.895094] [ 50.895311] Memory state around the buggy address: [ 50.895893] ffff88800c5eec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 50.896750] ffff88800c5eec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 50.897607] >ffff88800c5eed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 50.898464] ^ [ 50.898904] ffff88800c5eed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 50.899764] ffff88800c5eee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.900620] ================================================================== [ 50.901744] Disabling lock debugging due to kernel taint [ 52.492927] BUG: Bad rss-counter state mm:0000000079ece8d0 type:MM_FILEPAGES val:33 [ 52.494152] BUG: Bad rss-counter state mm:0000000079ece8d0 type:MM_ANONPAGES val:22 [ 53.028770] BUG: Bad rss-counter state mm:00000000864a6877 type:MM_FILEPAGES val:33 [ 53.030019] BUG: Bad rss-counter state mm:00000000864a6877 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48230' (ECDSA) to the list of known hosts. 2023/06/19 22:15:09 fuzzer started 2023/06/19 22:15:09 dialing manager at localhost:44161 2023/06/19 22:15:09 checking machine... 2023/06/19 22:15:09 checking revisions... [ 53.670061] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:15:10 testing simple program... [ 53.727098] cgroup: Unknown subsys name 'net' [ 53.770908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:14:49 Registers: info registers vcpu 0 RAX=ffff888008d80001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d7fe01 RSI=ffff888008d7fec8 RDI=ffff888008d7fec8 RBP=ffff888008d7f9a8 RSP=ffff888008d7f8d8 R8 =ffffffff8609f9be R9 =ffff888008d7f990 R10=0000000000038001 R11=00000000000078fb R12=ffff888008d7f9b0 R13=ffff888008d7f998 R14=ffff888008d7fed0 R15=ffff888008d7f950 RIP=ffffffff8112fbf0 RFL=00000202 [-------] 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=00007ffed8a05000 CR3=0000000013e3a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f7efed366b0 CR3=000000000cb3c000 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=428c0b8adb72e2991f4dd1421e7f67bd XMM02=000000000011dd18eff9b2d0a8fce9cb XMM03=000000000011dde82c67c8bc2e329bc3 XMM04=6187a77b6d21ab8100000000000ae988 XMM05=cc8ef257c7819a380000000000134850 XMM06=4fda316b135da52b0000000000134248 XMM07=e042d86d42eb936e0000000000124a58 XMM08=dcb0f462dd85c4a4000000000011dde8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000