syzkaller login: [ 31.337724] BUG: Bad rss-counter state mm:00000000db303238 type:MM_FILEPAGES val:33 [ 31.338907] BUG: Bad rss-counter state mm:00000000db303238 type:MM_ANONPAGES val:22 [ 31.494871] ================================================================== [ 31.495860] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.496815] Read of size 8 at addr ffff8880181f7df0 by task sshd/220 [ 31.497634] [ 31.497857] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.498862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.499873] Call Trace: [ 31.500195] [ 31.500502] dump_stack_lvl+0x91/0xf0 [ 31.500998] print_report+0xcc/0x620 [ 31.501488] ? __virt_addr_valid+0x102/0x340 [ 31.502054] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.502676] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.503320] kasan_report+0xbe/0xf0 [ 31.503809] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.504439] vma_interval_tree_remove+0xc75/0xec0 [ 31.505043] vma_prepare+0xc54/0x11a0 [ 31.505526] __split_vma+0x5af/0x950 [ 31.506004] ? __pfx___split_vma+0x10/0x10 [ 31.506540] ? find_held_lock+0x2c/0x110 [ 31.507072] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.507652] ? lock_is_held_type+0x9f/0x120 [ 31.508200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.508821] ? mtree_range_walk+0x632/0x900 [ 31.509372] ? mas_walk+0x5c7/0x7c0 [ 31.509851] do_vmi_munmap+0x1f1/0x2b0 [ 31.510356] mmap_region+0x1f9/0x2660 [ 31.510851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.511387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.512105] ? __pfx_lock_acquire+0x10/0x10 [ 31.512640] ? __pfx_mmap_region+0x10/0x10 [ 31.513176] ? security_mmap_addr+0x7d/0xa0 [ 31.513714] ? get_unmapped_area+0x1f5/0x3f0 [ 31.514265] do_mmap+0x854/0xf00 [ 31.514710] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.515214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.515784] ksys_mmap_pgoff+0x3af/0x500 [ 31.516296] do_syscall_64+0x3f/0x90 [ 31.516781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.517431] RIP: 0033:0x7f627828bd82 [ 31.517905] 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 [ 31.520045] RSP: 002b:00007ffcb0cd5078 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.520952] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f627828bd82 [ 31.521807] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f62776c5000 [ 31.522660] RBP: 00007f62776c5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.523542] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b6f738f70 [ 31.524390] R13: 00007ffcb0cd5090 R14: 00007ffcb0cd50c0 R15: 00007ffcb0cd5420 [ 31.525258] [ 31.525553] [ 31.525778] Allocated by task 213: [ 31.526208] kasan_save_stack+0x22/0x50 [ 31.526717] kasan_set_track+0x25/0x30 [ 31.527214] __kasan_slab_alloc+0x59/0x70 [ 31.527745] kmem_cache_alloc+0x16b/0x370 [ 31.528268] vm_area_dup+0x20/0x160 [ 31.528723] __split_vma+0x170/0x950 [ 31.529192] split_vma+0xc6/0x110 [ 31.529633] mprotect_fixup+0x8d2/0xb30 [ 31.530148] do_mprotect_pkey+0x87e/0xd40 [ 31.530670] __x64_sys_mprotect+0x78/0xc0 [ 31.531189] do_syscall_64+0x3f/0x90 [ 31.531686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.532339] [ 31.532557] Freed by task 213: [ 31.532957] kasan_save_stack+0x22/0x50 [ 31.533475] kasan_set_track+0x25/0x30 [ 31.533981] kasan_save_free_info+0x2b/0x50 [ 31.534529] __kasan_slab_free+0x10a/0x190 [ 31.535074] kmem_cache_free+0x10d/0x4d0 [ 31.535607] rcu_core+0x8c8/0x2860 [ 31.536063] __do_softirq+0x1b7/0x7d4 [ 31.536550] [ 31.536778] Last potentially related work creation: [ 31.537378] kasan_save_stack+0x22/0x50 [ 31.537888] __kasan_record_aux_stack+0x8e/0xa0 [ 31.538462] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.539107] remove_vma+0x139/0x170 [ 31.539581] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.540142] do_vmi_munmap+0x1f1/0x2b0 [ 31.540633] __vm_munmap+0x138/0x3a0 [ 31.541106] __x64_sys_munmap+0x59/0x80 [ 31.541607] do_syscall_64+0x3f/0x90 [ 31.542086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.542726] [ 31.542941] The buggy address belongs to the object at ffff8880181f7d98 [ 31.542941] which belongs to the cache vm_area_struct of size 168 [ 31.544413] The buggy address is located 88 bytes inside of [ 31.544413] freed 168-byte region [ffff8880181f7d98, ffff8880181f7e40) [ 31.545819] [ 31.546034] The buggy address belongs to the physical page: [ 31.546697] page:00000000294d6a1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x181f7 [ 31.547804] memcg:ffff8880197bd201 [ 31.548237] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.548886] page_type: 0xffffffff() [ 31.549345] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.550270] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197bd201 [ 31.551179] page dumped because: kasan: bad access detected [ 31.551864] [ 31.552079] Memory state around the buggy address: [ 31.552663] ffff8880181f7c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.553538] ffff8880181f7d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.554413] >ffff8880181f7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.555282] ^ [ 31.556100] ffff8880181f7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.556964] ffff8880181f7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.557828] ================================================================== [ 31.559038] Disabling lock debugging due to kernel taint [ 33.528692] BUG: Bad rss-counter state mm:000000009c6a3ed2 type:MM_FILEPAGES val:33 [ 33.530277] BUG: Bad rss-counter state mm:000000009c6a3ed2 type:MM_ANONPAGES val:22 [ 34.017692] BUG: Bad rss-counter state mm:000000004c6dc3d7 type:MM_FILEPAGES val:33 [ 34.019370] BUG: Bad rss-counter state mm:000000004c6dc3d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5228' (ECDSA) to the list of known hosts. 2023/06/19 20:52:18 fuzzer started 2023/06/19 20:52:18 dialing manager at localhost:44161 2023/06/19 20:52:18 checking machine... 2023/06/19 20:52:18 checking revisions... [ 34.788100] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:52:18 testing simple program... [ 34.827515] cgroup: Unknown subsys name 'net' [ 34.868006] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:52:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fb4ebaed000 CR3=000000000c622000 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=2cd88ea614523a8b7044b5ca69a2ba6b XMM02=000000000011e018ec2efd57dc4c00df XMM03=000000000012554867954800c435522e XMM04=a665aee76eb0d91f00000000000ae988 XMM05=625d76ead52c685d0000000000135ea0 XMM06=4fda316b135da52b0000000000134f40 XMM07=e042d86d42eb936e00000000001257c8 XMM08=67954800c435522e000000000011e078 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001dd40f1 RBX=dffffc0000000000 RCX=ffffffff812e00e5 RDX=1ffff110033234f3 RSI=ffffffff87b86f80 RDI=ffff88801991b9f0 RBP=ffff88801991b9e8 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=ffff88800eea0788 R13=fffffbfff0f70df0 R14=ffff888019919198 R15=ffffffff87b86f80 RIP=ffffffff844cc473 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 00007ffa155ea900 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=00007ffd9dcc0000 CR3=0000000009bb2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000