syzkaller login: [ 31.330587] BUG: Bad rss-counter state mm:00000000351874d6 type:MM_FILEPAGES val:33 [ 31.331974] BUG: Bad rss-counter state mm:00000000351874d6 type:MM_ANONPAGES val:22 [ 31.495818] ================================================================== [ 31.496930] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.498188] Read of size 8 at addr ffff888018ee5a50 by task sshd/220 [ 31.498968] [ 31.499183] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.500055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.501034] Call Trace: [ 31.501350] [ 31.501646] dump_stack_lvl+0x91/0xf0 [ 31.502139] print_report+0xcc/0x620 [ 31.502619] ? __virt_addr_valid+0x102/0x340 [ 31.503164] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.503776] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.504391] kasan_report+0xbe/0xf0 [ 31.504859] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.505483] vma_interval_tree_remove+0xc75/0xec0 [ 31.506096] vma_prepare+0xc54/0x11a0 [ 31.506572] __split_vma+0x5af/0x950 [ 31.507040] ? __pfx___split_vma+0x10/0x10 [ 31.507566] ? find_held_lock+0x2c/0x110 [ 31.508082] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.508655] ? lock_is_held_type+0x9f/0x120 [ 31.509193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.509819] ? mtree_range_walk+0x632/0x900 [ 31.510375] ? mas_walk+0x5c7/0x7c0 [ 31.510852] do_vmi_munmap+0x1f1/0x2b0 [ 31.511339] mmap_region+0x1f9/0x2660 [ 31.511813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.512319] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.513028] ? __pfx_lock_acquire+0x10/0x10 [ 31.513569] ? __pfx_mmap_region+0x10/0x10 [ 31.514093] ? security_mmap_addr+0x7d/0xa0 [ 31.514626] ? get_unmapped_area+0x1f5/0x3f0 [ 31.515184] do_mmap+0x854/0xf00 [ 31.515623] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.516118] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.516687] ksys_mmap_pgoff+0x3af/0x500 [ 31.517192] do_syscall_64+0x3f/0x90 [ 31.517689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.518339] RIP: 0033:0x7fa102ca5d82 [ 31.518798] 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 [ 31.520905] RSP: 002b:00007fff10af51a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.521832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa102ca5d82 [ 31.522679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1020df000 [ 31.523524] RBP: 00007fa1020df000 R08: 0000000000000009 R09: 0000000000001000 [ 31.524368] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564564eedb20 [ 31.525211] R13: 00007fff10af51c0 R14: 00007fff10af51f0 R15: 00007fff10af5550 [ 31.526078] [ 31.526371] [ 31.526584] Allocated by task 213: [ 31.527013] kasan_save_stack+0x22/0x50 [ 31.527518] kasan_set_track+0x25/0x30 [ 31.528011] __kasan_slab_alloc+0x59/0x70 [ 31.528537] kmem_cache_alloc+0x16b/0x370 [ 31.529057] vm_area_dup+0x20/0x160 [ 31.529524] __split_vma+0x170/0x950 [ 31.529989] split_vma+0xc6/0x110 [ 31.530427] mprotect_fixup+0x8d2/0xb30 [ 31.530935] do_mprotect_pkey+0x87e/0xd40 [ 31.531460] __x64_sys_mprotect+0x78/0xc0 [ 31.531981] do_syscall_64+0x3f/0x90 [ 31.532452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.533095] [ 31.533312] Freed by task 203: [ 31.533715] kasan_save_stack+0x22/0x50 [ 31.534215] kasan_set_track+0x25/0x30 [ 31.534710] kasan_save_free_info+0x2b/0x50 [ 31.535241] __kasan_slab_free+0x10a/0x190 [ 31.535774] kmem_cache_free+0x10d/0x4d0 [ 31.536278] rcu_core+0x8c8/0x2860 [ 31.536719] __do_softirq+0x1b7/0x7d4 [ 31.537193] [ 31.537418] Last potentially related work creation: [ 31.538009] kasan_save_stack+0x22/0x50 [ 31.538511] __kasan_record_aux_stack+0x8e/0xa0 [ 31.539087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.539806] remove_vma+0x139/0x170 [ 31.540257] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.540812] do_vmi_munmap+0x1f1/0x2b0 [ 31.541294] __vm_munmap+0x138/0x3a0 [ 31.541775] __x64_sys_munmap+0x59/0x80 [ 31.542270] do_syscall_64+0x3f/0x90 [ 31.542740] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.543381] [ 31.543594] The buggy address belongs to the object at ffff888018ee59f8 [ 31.543594] which belongs to the cache vm_area_struct of size 168 [ 31.545052] The buggy address is located 88 bytes inside of [ 31.545052] freed 168-byte region [ffff888018ee59f8, ffff888018ee5aa0) [ 31.546454] [ 31.546670] The buggy address belongs to the physical page: [ 31.547322] page:000000004d56fff9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ee5 [ 31.548406] memcg:ffff888018d7ff01 [ 31.548828] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.549473] page_type: 0xffffffff() [ 31.549925] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.550840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018d7ff01 [ 31.551746] page dumped because: kasan: bad access detected [ 31.552402] [ 31.552617] Memory state around the buggy address: [ 31.553192] ffff888018ee5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.554067] ffff888018ee5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.554920] >ffff888018ee5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.555763] ^ [ 31.556462] ffff888018ee5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.557313] ffff888018ee5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.558169] ================================================================== [ 31.559111] Disabling lock debugging due to kernel taint [ 34.194281] BUG: Bad rss-counter state mm:00000000f21151f5 type:MM_FILEPAGES val:33 [ 34.195086] BUG: Bad rss-counter state mm:00000000f21151f5 type:MM_ANONPAGES val:22 [ 34.672551] BUG: Bad rss-counter state mm:00000000564b0b68 type:MM_FILEPAGES val:33 [ 34.673681] BUG: Bad rss-counter state mm:00000000564b0b68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55463' (ECDSA) to the list of known hosts. 2023/06/21 08:13:48 fuzzer started 2023/06/21 08:13:48 dialing manager at localhost:36067 2023/06/21 08:13:48 checking machine... 2023/06/21 08:13:48 checking revisions... [ 35.308884] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:13:49 testing simple program... [ 35.353068] cgroup: Unknown subsys name 'net' [ 35.393294] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:13:48 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888015fb7928 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=dffffc0000000000 RIP=ffffffff812d8a60 RFL=00000282 [--S----] 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 00007f8958011900 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=00007f89585c90b0 CR3=0000000009abc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8f0e92d5e0 CR3=000000000d980000 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=b574e381b38eb7a3434ab5a7c359f813 XMM02=000000000011a438ec2efd57dc4c00df XMM03=00000000001218f8d645453f8bbd280f XMM04=13fd07845d38380900000000000ae988 XMM05=19e9129bd510f23500000000001317d8 XMM06=4fda316b135da52b0000000000131660 XMM07=e042d86d42eb936e0000000000121b78 XMM08=d645453f8bbd280f000000000011a498 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000