syzkaller login: [ 33.692683] BUG: Bad rss-counter state mm:0000000055656330 type:MM_FILEPAGES val:33 [ 33.694813] BUG: Bad rss-counter state mm:0000000055656330 type:MM_ANONPAGES val:22 [ 33.857551] ================================================================== [ 33.858049] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.858566] Read of size 8 at addr ffff888019f51ed8 by task sshd/220 [ 33.858979] [ 33.859095] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.859552] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.860071] Call Trace: [ 33.860240] [ 33.860390] dump_stack_lvl+0x91/0xf0 [ 33.860650] print_report+0xcc/0x620 [ 33.860910] ? __virt_addr_valid+0x102/0x340 [ 33.861204] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.861528] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.861851] kasan_report+0xbe/0xf0 [ 33.862107] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.862434] vma_interval_tree_remove+0xc75/0xec0 [ 33.862891] vma_prepare+0xc54/0x11a0 [ 33.863163] __split_vma+0x5af/0x950 [ 33.863417] ? __pfx___split_vma+0x10/0x10 [ 33.863700] ? find_held_lock+0x2c/0x110 [ 33.863977] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.864274] ? lock_is_held_type+0x9f/0x120 [ 33.864558] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.864882] ? mtree_range_walk+0x632/0x900 [ 33.865174] ? mas_walk+0x5c7/0x7c0 [ 33.865423] do_vmi_munmap+0x1f1/0x2b0 [ 33.865686] mmap_region+0x1f9/0x2660 [ 33.865943] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.866226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.866603] ? __pfx_lock_acquire+0x10/0x10 [ 33.866890] ? __pfx_mmap_region+0x10/0x10 [ 33.867186] ? security_mmap_addr+0x7d/0xa0 [ 33.867481] ? get_unmapped_area+0x1f5/0x3f0 [ 33.867787] do_mmap+0x854/0xf00 [ 33.868038] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.868310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.868620] ksys_mmap_pgoff+0x3af/0x500 [ 33.868905] do_syscall_64+0x3f/0x90 [ 33.869171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.869529] RIP: 0033:0x7fb62ae57d82 [ 33.869782] 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 [ 33.870980] RSP: 002b:00007ffe4c59f6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.871490] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb62ae57d82 [ 33.871961] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb62a291000 [ 33.872434] RBP: 00007fb62a291000 R08: 0000000000000009 R09: 0000000000001000 [ 33.872911] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e417e41ec0 [ 33.873379] R13: 00007ffe4c59f6c0 R14: 00007ffe4c59f6f0 R15: 00007ffe4c59fa50 [ 33.873853] [ 33.874019] [ 33.874141] Allocated by task 213: [ 33.874382] kasan_save_stack+0x22/0x50 [ 33.874665] kasan_set_track+0x25/0x30 [ 33.874939] __kasan_slab_alloc+0x59/0x70 [ 33.875232] kmem_cache_alloc+0x16b/0x370 [ 33.875521] vm_area_dup+0x20/0x160 [ 33.875776] __split_vma+0x170/0x950 [ 33.876037] split_vma+0xc6/0x110 [ 33.876282] mprotect_fixup+0x8d2/0xb30 [ 33.876561] do_mprotect_pkey+0x87e/0xd40 [ 33.876850] __x64_sys_mprotect+0x78/0xc0 [ 33.877141] do_syscall_64+0x3f/0x90 [ 33.877402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.877758] [ 33.877881] Freed by task 213: [ 33.878115] kasan_save_stack+0x22/0x50 [ 33.878394] kasan_set_track+0x25/0x30 [ 33.878669] kasan_save_free_info+0x2b/0x50 [ 33.878964] __kasan_slab_free+0x10a/0x190 [ 33.879259] kmem_cache_free+0x10d/0x4d0 [ 33.879539] rcu_core+0x8c8/0x2860 [ 33.879783] __do_softirq+0x1b7/0x7d4 [ 33.880048] [ 33.880170] Last potentially related work creation: [ 33.880496] kasan_save_stack+0x22/0x50 [ 33.880780] __kasan_record_aux_stack+0x8e/0xa0 [ 33.881100] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.881456] remove_vma+0x139/0x170 [ 33.881707] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.882017] do_vmi_munmap+0x1f1/0x2b0 [ 33.882293] __vm_munmap+0x138/0x3a0 [ 33.882552] __x64_sys_munmap+0x59/0x80 [ 33.882831] do_syscall_64+0x3f/0x90 [ 33.883094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.883451] [ 33.883573] The buggy address belongs to the object at ffff888019f51e80 [ 33.883573] which belongs to the cache vm_area_struct of size 168 [ 33.884402] The buggy address is located 88 bytes inside of [ 33.884402] freed 168-byte region [ffff888019f51e80, ffff888019f51f28) [ 33.885186] [ 33.885305] The buggy address belongs to the physical page: [ 33.885679] page:00000000046d56a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f51 [ 33.886295] memcg:ffff888019f5cf01 [ 33.886534] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.886896] page_type: 0xffffffff() [ 33.887149] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.887658] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f5cf01 [ 33.888166] page dumped because: kasan: bad access detected [ 33.888535] [ 33.888655] Memory state around the buggy address: [ 33.888982] ffff888019f51d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.889458] ffff888019f51e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.889935] >ffff888019f51e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.890421] ^ [ 33.890827] ffff888019f51f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 33.891305] ffff888019f51f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.891783] ================================================================== [ 33.892313] Disabling lock debugging due to kernel taint [ 35.798210] BUG: Bad rss-counter state mm:00000000ab161068 type:MM_FILEPAGES val:33 [ 35.799317] BUG: Bad rss-counter state mm:00000000ab161068 type:MM_ANONPAGES val:22 [ 36.297465] BUG: Bad rss-counter state mm:0000000096940a45 type:MM_FILEPAGES val:33 [ 36.298779] BUG: Bad rss-counter state mm:0000000096940a45 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1545' (ECDSA) to the list of known hosts. 2023/06/19 19:41:25 fuzzer started 2023/06/19 19:41:25 dialing manager at localhost:44161 2023/06/19 19:41:25 checking machine... 2023/06/19 19:41:25 checking revisions... [ 37.038571] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:41:25 testing simple program... [ 37.086597] cgroup: Unknown subsys name 'net' [ 37.125391] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:41:22 Registers: info registers vcpu 0 RAX=0000000000005e7b RBX=ffff88800fda2140 RCX=ffffffff8181f4a2 RDX=ffffed1001fb4429 RSI=0000000000005e7b RDI=0000000000000000 RBP=0000000000005e7b RSP=ffff88806ce09cc0 R8 =0000000000000001 R9 =ffffed1001fb4428 R10=ffff88800fda2147 R11=0000000000000000 R12=ffff88800fda2140 R13=0000000000000001 R14=0000000000005e7b R15=ffff888016c18010 RIP=ffffffff814c03b8 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 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=00007f3a772172e0 CR3=000000001028c000 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=2034323a31343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008859d80 RCX=0000000000000000 RDX=ffff888014723680 RSI=ffffffff8198959d RDI=ffff88800885a1e8 RBP=0000000000000000 RSP=ffff88800efb7c40 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008859f38 R13=ffff888008859f28 R14=ffff888008859e08 R15=ffff888008859e58 RIP=ffffffff81992f76 RFL=00000293 [--S-A-C] 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 00007f8bf103b900 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=00007ffd784d9000 CR3=0000000016fc6000 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=563412feff00545000000000000080fe 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