syzkaller login: [ 30.512348] BUG: Bad rss-counter state mm:000000007cd56279 type:MM_FILEPAGES val:33 [ 30.513120] BUG: Bad rss-counter state mm:000000007cd56279 type:MM_ANONPAGES val:22 [ 30.544427] ================================================================== [ 30.545138] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.545798] Read of size 8 at addr ffff88800f66ac20 by task sshd/220 [ 30.546323] [ 30.546465] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.547055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.547715] Call Trace: [ 30.547930] [ 30.548134] dump_stack_lvl+0x91/0xf0 [ 30.548501] print_report+0xcc/0x620 [ 30.548827] ? __virt_addr_valid+0x102/0x340 [ 30.549205] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.549654] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.550093] kasan_report+0xbe/0xf0 [ 30.550407] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.550825] vma_interval_tree_remove+0xc75/0xec0 [ 30.551263] vma_prepare+0xc54/0x11a0 [ 30.551589] __split_vma+0x5af/0x950 [ 30.551905] ? __pfx___split_vma+0x10/0x10 [ 30.552252] ? find_held_lock+0x2c/0x110 [ 30.552596] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.552977] ? lock_is_held_type+0x9f/0x120 [ 30.553449] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.553846] ? mtree_range_walk+0x632/0x900 [ 30.554220] ? mas_walk+0x5c7/0x7c0 [ 30.554538] do_vmi_munmap+0x1f1/0x2b0 [ 30.554871] mmap_region+0x1f9/0x2660 [ 30.555197] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.555546] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.556033] ? __pfx_lock_acquire+0x10/0x10 [ 30.556406] ? __pfx_mmap_region+0x10/0x10 [ 30.556928] ? security_mmap_addr+0x7d/0xa0 [ 30.557277] ? get_unmapped_area+0x1f5/0x3f0 [ 30.557678] do_mmap+0x854/0xf00 [ 30.557982] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.558320] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.558744] ksys_mmap_pgoff+0x3af/0x500 [ 30.559147] do_syscall_64+0x3f/0x90 [ 30.559488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.559938] RIP: 0033:0x7f28215e0d82 [ 30.560296] 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 [ 30.561846] RSP: 002b:00007ffe31bc2118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.562503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28215e0d82 [ 30.563070] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2820a1a000 [ 30.563696] RBP: 00007f2820a1a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.564337] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e993dadec0 [ 30.564927] R13: 00007ffe31bc2130 R14: 00007ffe31bc2160 R15: 00007ffe31bc24c0 [ 30.565600] [ 30.565802] [ 30.565956] Allocated by task 213: [ 30.566263] kasan_save_stack+0x22/0x50 [ 30.566632] kasan_set_track+0x25/0x30 [ 30.566978] __kasan_slab_alloc+0x59/0x70 [ 30.567372] kmem_cache_alloc+0x16b/0x370 [ 30.567724] vm_area_dup+0x20/0x160 [ 30.568035] __split_vma+0x170/0x950 [ 30.568409] split_vma+0xc6/0x110 [ 30.568710] mprotect_fixup+0x8d2/0xb30 [ 30.569054] do_mprotect_pkey+0x87e/0xd40 [ 30.569465] __x64_sys_mprotect+0x78/0xc0 [ 30.569852] do_syscall_64+0x3f/0x90 [ 30.570211] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.570666] [ 30.570818] Freed by task 213: [ 30.571087] kasan_save_stack+0x22/0x50 [ 30.571482] kasan_set_track+0x25/0x30 [ 30.571818] kasan_save_free_info+0x2b/0x50 [ 30.572200] __kasan_slab_free+0x10a/0x190 [ 30.572601] kmem_cache_free+0x10d/0x4d0 [ 30.572958] rcu_core+0x8c8/0x2860 [ 30.573297] __do_softirq+0x1b7/0x7d4 [ 30.573716] [ 30.573864] Last potentially related work creation: [ 30.574297] kasan_save_stack+0x22/0x50 [ 30.574657] __kasan_record_aux_stack+0x8e/0xa0 [ 30.575059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.575511] remove_vma+0x139/0x170 [ 30.575826] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.576242] do_vmi_munmap+0x1f1/0x2b0 [ 30.576578] __vm_munmap+0x138/0x3a0 [ 30.576903] __x64_sys_munmap+0x59/0x80 [ 30.577284] do_syscall_64+0x3f/0x90 [ 30.577674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.578145] [ 30.578296] The buggy address belongs to the object at ffff88800f66abc8 [ 30.578296] which belongs to the cache vm_area_struct of size 168 [ 30.579313] The buggy address is located 88 bytes inside of [ 30.579313] freed 168-byte region [ffff88800f66abc8, ffff88800f66ac70) [ 30.580285] [ 30.580447] The buggy address belongs to the physical page: [ 30.580909] page:00000000ff8ea196 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf66a [ 30.581702] memcg:ffff88800c53fb01 [ 30.581999] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.582470] page_type: 0xffffffff() [ 30.582782] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.583467] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c53fb01 [ 30.584105] page dumped because: kasan: bad access detected [ 30.584584] [ 30.584730] Memory state around the buggy address: [ 30.585144] ffff88800f66ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.585849] ffff88800f66ab80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.586444] >ffff88800f66ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.587029] ^ [ 30.587391] ffff88800f66ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.587992] ffff88800f66ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.588620] ================================================================== [ 30.589523] Disabling lock debugging due to kernel taint [ 32.004018] BUG: Bad rss-counter state mm:00000000cc61cc56 type:MM_FILEPAGES val:33 [ 32.004708] BUG: Bad rss-counter state mm:00000000cc61cc56 type:MM_ANONPAGES val:22 [ 32.386430] BUG: Bad rss-counter state mm:0000000028708c70 type:MM_FILEPAGES val:33 [ 32.387100] BUG: Bad rss-counter state mm:0000000028708c70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35696' (ECDSA) to the list of known hosts. 2023/06/21 09:29:11 fuzzer started 2023/06/21 09:29:11 dialing manager at localhost:36067 2023/06/21 09:29:11 checking machine... 2023/06/21 09:29:11 checking revisions... [ 32.961348] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:29:11 testing simple program... [ 33.004306] cgroup: Unknown subsys name 'net' [ 33.045873] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:29:11 Registers: info registers vcpu 0 RAX=ffffffff866211fc RBX=ffffffff86057798 RCX=ffffffff86621197 RDX=0000000000000000 RSI=ffffffff86073d08 RDI=ffffffff85d7a9c4 RBP=ffffffff86057790 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff86057794 R13=ffffffff85d7a9c4 R14=ffffffff8605778c R15=dffffc0000000000 RIP=ffffffff8112fc57 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=00007fa658e26000 CR3=0000000016bea000 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=2031313a39323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fe21a57c598 RCX=0000000000000000 RDX=0000000000000001 RSI=00007fe21b129740 RDI=00007fe21a57d000 RBP=00007fe21a57d000 RSP=00007fffad381d10 R8 =0000563c194710d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=0000563c194908c0 R13=00007fe21ab52ae8 R14=0000000000000020 R15=0000000000000000 RIP=00007fe21a9d0a32 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe21a59e900 00000000 00000000 GS =0000 0000000000000000 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=00007fe21ab52ae8 CR3=000000000c740000 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