syzkaller login: [ 30.367090] BUG: Bad rss-counter state mm:00000000f7e26a73 type:MM_FILEPAGES val:33 [ 30.368413] BUG: Bad rss-counter state mm:00000000f7e26a73 type:MM_ANONPAGES val:22 [ 30.412367] ================================================================== [ 30.413280] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.414242] Read of size 8 at addr ffff88801bc0fed8 by task sshd/219 [ 30.415142] [ 30.415427] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.416294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.417383] Call Trace: [ 30.417800] [ 30.418098] dump_stack_lvl+0x91/0xf0 [ 30.418677] print_report+0xcc/0x620 [ 30.419189] ? __virt_addr_valid+0x102/0x340 [ 30.419789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.420552] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.421266] kasan_report+0xbe/0xf0 [ 30.421899] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.422623] vma_interval_tree_remove+0xc75/0xec0 [ 30.423309] vma_prepare+0xc54/0x11a0 [ 30.423803] __split_vma+0x5af/0x950 [ 30.424312] ? __pfx___split_vma+0x10/0x10 [ 30.424985] ? find_held_lock+0x2c/0x110 [ 30.425606] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.426169] ? lock_is_held_type+0x9f/0x120 [ 30.426711] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.427316] ? mtree_range_walk+0x632/0x900 [ 30.427872] ? mas_walk+0x5c7/0x7c0 [ 30.428378] do_vmi_munmap+0x1f1/0x2b0 [ 30.428964] mmap_region+0x1f9/0x2660 [ 30.429452] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.429964] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.430865] ? __pfx_lock_acquire+0x10/0x10 [ 30.431491] ? __pfx_mmap_region+0x10/0x10 [ 30.432018] ? security_mmap_addr+0x7d/0xa0 [ 30.432564] ? get_unmapped_area+0x1f5/0x3f0 [ 30.433213] do_mmap+0x854/0xf00 [ 30.433659] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.434185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.434881] ksys_mmap_pgoff+0x3af/0x500 [ 30.435520] do_syscall_64+0x3f/0x90 [ 30.436111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.436755] RIP: 0033:0x7f9fdc3c7d82 [ 30.437211] 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 [ 30.439342] RSP: 002b:00007ffea4c2f928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.440240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9fdc3c7d82 [ 30.441088] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9fdb801000 [ 30.441937] RBP: 00007f9fdb801000 R08: 0000000000000009 R09: 0000000000001000 [ 30.442783] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e541164f70 [ 30.443631] R13: 00007ffea4c2f940 R14: 00007ffea4c2f970 R15: 00007ffea4c2fcd0 [ 30.444481] [ 30.444774] [ 30.444993] Allocated by task 212: [ 30.445434] kasan_save_stack+0x22/0x50 [ 30.445945] kasan_set_track+0x25/0x30 [ 30.446443] __kasan_slab_alloc+0x59/0x70 [ 30.446966] kmem_cache_alloc+0x16b/0x370 [ 30.447490] vm_area_dup+0x20/0x160 [ 30.447951] __split_vma+0x170/0x950 [ 30.448416] split_vma+0xc6/0x110 [ 30.448857] mprotect_fixup+0x8d2/0xb30 [ 30.449360] do_mprotect_pkey+0x87e/0xd40 [ 30.449894] __x64_sys_mprotect+0x78/0xc0 [ 30.450416] do_syscall_64+0x3f/0x90 [ 30.450889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.451541] [ 30.451757] Freed by task 212: [ 30.452148] kasan_save_stack+0x22/0x50 [ 30.452658] kasan_set_track+0x25/0x30 [ 30.453157] kasan_save_free_info+0x2b/0x50 [ 30.453814] __kasan_slab_free+0x10a/0x190 [ 30.454350] kmem_cache_free+0x10d/0x4d0 [ 30.454877] rcu_core+0x8c8/0x2860 [ 30.455325] __do_softirq+0x1b7/0x7d4 [ 30.455804] [ 30.456018] Last potentially related work creation: [ 30.456622] kasan_save_stack+0x22/0x50 [ 30.457130] __kasan_record_aux_stack+0x8e/0xa0 [ 30.457719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.458375] remove_vma+0x139/0x170 [ 30.458826] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.459389] do_vmi_munmap+0x1f1/0x2b0 [ 30.459889] __vm_munmap+0x138/0x3a0 [ 30.460352] __x64_sys_munmap+0x59/0x80 [ 30.460850] do_syscall_64+0x3f/0x90 [ 30.461323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.461976] [ 30.462195] The buggy address belongs to the object at ffff88801bc0fe80 [ 30.462195] which belongs to the cache vm_area_struct of size 168 [ 30.463669] The buggy address is located 88 bytes inside of [ 30.463669] freed 168-byte region [ffff88801bc0fe80, ffff88801bc0ff28) [ 30.465073] [ 30.465292] The buggy address belongs to the physical page: [ 30.465962] page:00000000827670b2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc0f [ 30.467049] memcg:ffff88801a7eb801 [ 30.467476] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.468125] page_type: 0xffffffff() [ 30.468576] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.469500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a7eb801 [ 30.470406] page dumped because: kasan: bad access detected [ 30.471073] [ 30.471288] Memory state around the buggy address: [ 30.471866] ffff88801bc0fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.472716] ffff88801bc0fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.473580] >ffff88801bc0fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.474431] ^ [ 30.475155] ffff88801bc0ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.476021] ffff88801bc0ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.476865] ================================================================== [ 30.477785] Disabling lock debugging due to kernel taint [ 32.698643] BUG: Bad rss-counter state mm:00000000737acd81 type:MM_FILEPAGES val:33 [ 32.699805] BUG: Bad rss-counter state mm:00000000737acd81 type:MM_ANONPAGES val:22 [ 33.181686] BUG: Bad rss-counter state mm:00000000dcd5566f type:MM_FILEPAGES val:33 [ 33.182675] BUG: Bad rss-counter state mm:00000000dcd5566f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48230' (ECDSA) to the list of known hosts. 2023/06/20 20:50:06 fuzzer started 2023/06/20 20:50:06 dialing manager at localhost:36067 2023/06/20 20:50:06 checking machine... 2023/06/20 20:50:06 checking revisions... [ 33.892858] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:50:06 testing simple program... [ 33.945999] cgroup: Unknown subsys name 'net' [ 33.999475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:50:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880180df4d0 RCX=0000000000000001 RDX=1ffff1100301beaf RSI=ffffffff81f59cae RDI=ffff8880180df4dc RBP=ffff8880180df578 RSP=ffff8880180df3e8 R8 =0000000000000001 R9 =ffff8880180df448 R10=0000000000038001 R11=000000000003aa1f R12=ffff8880180df4d0 R13=0000000000000000 R14=ffff888015a00000 R15=000000000000001e RIP=ffffffff813ad547 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 00007fc18bbc2700 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=00007fc41176b6a0 CR3=000000000942c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036303a3035 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383635 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81370a8a RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110011c6f35 RSI=ffffffff81370a8a RDI=ffff888008e37a18 RBP=ffff888008e379e8 RSP=ffff888008e37948 R8 =0000000000000001 R9 =ffff888008e37990 R10=0000000000038001 R11=0000000000020ed2 R12=ffff888008e37a18 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff888015a59000 RIP=ffffffff84538440 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 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=00007f0d16efb020 CR3=00000000161a6000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000