syzkaller login: [ 44.188688] BUG: Bad rss-counter state mm:000000008217f981 type:MM_FILEPAGES val:33 [ 44.190066] BUG: Bad rss-counter state mm:000000008217f981 type:MM_ANONPAGES val:22 [ 44.365404] ================================================================== [ 44.366398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.367400] Read of size 8 at addr ffff88801a34eed8 by task sshd/221 [ 44.368359] [ 44.368594] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.369511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.370560] Call Trace: [ 44.370902] [ 44.371209] dump_stack_lvl+0x91/0xf0 [ 44.371730] print_report+0xcc/0x620 [ 44.372268] ? __virt_addr_valid+0x102/0x340 [ 44.372853] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.373511] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.374172] kasan_report+0xbe/0xf0 [ 44.374682] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.375367] vma_interval_tree_remove+0xc75/0xec0 [ 44.376036] vma_prepare+0xc54/0x11a0 [ 44.376570] __split_vma+0x5af/0x950 [ 44.377099] ? __pfx___split_vma+0x10/0x10 [ 44.377694] ? find_held_lock+0x2c/0x110 [ 44.378276] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.378907] ? lock_is_held_type+0x9f/0x120 [ 44.379509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.380195] ? mtree_range_walk+0x632/0x900 [ 44.380810] ? mas_walk+0x5c7/0x7c0 [ 44.381339] do_vmi_munmap+0x1f1/0x2b0 [ 44.381888] mmap_region+0x1f9/0x2660 [ 44.382429] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.383002] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.383804] ? __pfx_lock_acquire+0x10/0x10 [ 44.384421] ? __pfx_mmap_region+0x10/0x10 [ 44.385010] ? security_mmap_addr+0x7d/0xa0 [ 44.385594] ? get_unmapped_area+0x1f5/0x3f0 [ 44.386208] do_mmap+0x854/0xf00 [ 44.386695] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.387241] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.387878] ksys_mmap_pgoff+0x3af/0x500 [ 44.388443] do_syscall_64+0x3f/0x90 [ 44.388954] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.389645] RIP: 0033:0x7fd1a5540d82 [ 44.390134] 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 [ 44.392391] RSP: 002b:00007ffc02cbc6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.393402] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1a5540d82 [ 44.394318] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1a497a000 [ 44.395229] RBP: 00007fd1a497a000 R08: 0000000000000009 R09: 0000000000001000 [ 44.396159] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555eb7ae1f70 [ 44.397082] R13: 00007ffc02cbc700 R14: 00007ffc02cbc730 R15: 00007ffc02cbca90 [ 44.398006] [ 44.398319] [ 44.398549] Allocated by task 214: [ 44.399007] kasan_save_stack+0x22/0x50 [ 44.399578] kasan_set_track+0x25/0x30 [ 44.400268] __kasan_slab_alloc+0x59/0x70 [ 44.401011] kmem_cache_alloc+0x16b/0x370 [ 44.401726] vm_area_dup+0x20/0x160 [ 44.402367] __split_vma+0x170/0x950 [ 44.402908] split_vma+0xc6/0x110 [ 44.403417] mprotect_fixup+0x8d2/0xb30 [ 44.403987] do_mprotect_pkey+0x87e/0xd40 [ 44.404558] __x64_sys_mprotect+0x78/0xc0 [ 44.405121] do_syscall_64+0x3f/0x90 [ 44.405681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.406475] [ 44.406723] Freed by task 214: [ 44.407156] kasan_save_stack+0x22/0x50 [ 44.407722] kasan_set_track+0x25/0x30 [ 44.408277] kasan_save_free_info+0x2b/0x50 [ 44.408859] __kasan_slab_free+0x10a/0x190 [ 44.409488] kmem_cache_free+0x10d/0x4d0 [ 44.410045] rcu_core+0x8c8/0x2860 [ 44.410543] __do_softirq+0x1b7/0x7d4 [ 44.411070] [ 44.411304] Last potentially related work creation: [ 44.411992] kasan_save_stack+0x22/0x50 [ 44.412553] __kasan_record_aux_stack+0x8e/0xa0 [ 44.413171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.413887] remove_vma+0x139/0x170 [ 44.414393] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.415014] do_vmi_munmap+0x1f1/0x2b0 [ 44.415557] __vm_munmap+0x138/0x3a0 [ 44.416092] __x64_sys_munmap+0x59/0x80 [ 44.416653] do_syscall_64+0x3f/0x90 [ 44.417185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.417901] [ 44.418143] The buggy address belongs to the object at ffff88801a34ee80 [ 44.418143] which belongs to the cache vm_area_struct of size 168 [ 44.419797] The buggy address is located 88 bytes inside of [ 44.419797] freed 168-byte region [ffff88801a34ee80, ffff88801a34ef28) [ 44.421383] [ 44.421629] The buggy address belongs to the physical page: [ 44.422388] page:00000000eb65173e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a34e [ 44.423652] memcg:ffff888016aa8b01 [ 44.424160] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.424907] page_type: 0xffffffff() [ 44.425438] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.426513] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016aa8b01 [ 44.427567] page dumped because: kasan: bad access detected [ 44.428361] [ 44.428604] Memory state around the buggy address: [ 44.429268] ffff88801a34ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.430243] ffff88801a34ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 44.431226] >ffff88801a34ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.432224] ^ [ 44.433064] ffff88801a34ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 44.434042] ffff88801a34ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 44.434993] ================================================================== [ 44.436039] Disabling lock debugging due to kernel taint [ 46.456241] BUG: Bad rss-counter state mm:00000000a54dc93d type:MM_FILEPAGES val:33 [ 46.457631] BUG: Bad rss-counter state mm:00000000a54dc93d type:MM_ANONPAGES val:22 [ 46.873615] BUG: Bad rss-counter state mm:000000008cfb5c9f type:MM_FILEPAGES val:33 [ 46.874965] BUG: Bad rss-counter state mm:000000008cfb5c9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16739' (ECDSA) to the list of known hosts. 2023/06/19 14:18:56 fuzzer started 2023/06/19 14:18:56 dialing manager at localhost:44161 2023/06/19 14:18:56 checking machine... 2023/06/19 14:18:56 checking revisions... [ 47.641608] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:18:56 testing simple program... [ 47.683424] cgroup: Unknown subsys name 'net' [ 47.723253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:18:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800885e1c0 RCX=0000000000000000 RDX=ffff888015cbfe88 RSI=ffffffff836381c5 RDI=ffffffff84da43b0 RBP=ffff888015cbfe60 RSP=ffff888015cbfb20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffffff83c23760 R13=0000000040000040 R14=ffff888015cbfe88 R15=ffff888015cbfea4 RIP=ffffffff83638216 RFL=00000246 [---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 00007f8db6539900 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=00007f45ae13b650 CR3=000000000c800000 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=9dfde3afcf86f38f7c4d208920817d39 XMM02=eff9b2d0a8fce9cb000000000011d620 XMM03=2c67c8bc2e329bc3000000000011d748 XMM04=02cf17186742101500000000000ae988 XMM05=2a49ca421d9a7f820000000000135928 XMM06=c291bd5c70af25b90000000000134718 XMM07=fb795ef6d65770560000000000124c88 XMM08=2c67c8bc2e329bc3000000000011d748 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001369f8f RBX=ffff888009b4fc48 RCX=ffffffff84530871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888009b4fc78 RBP=ffff888009a8bc98 RSP=ffff888016b67d28 R8 =0000000000000001 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888009a9d8e0 R14=ffffffff81ef13be R15=ffff88800cc1c180 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 00007f45adb86900 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=00007f45ae13e0b0 CR3=0000000016566000 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=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