syzkaller login: [ 30.442968] BUG: Bad rss-counter state mm:00000000e27770a0 type:MM_FILEPAGES val:33 [ 30.444182] BUG: Bad rss-counter state mm:00000000e27770a0 type:MM_ANONPAGES val:22 [ 30.484263] ================================================================== [ 30.485265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.486214] Read of size 8 at addr ffff88800f2ce058 by task sshd/221 [ 30.487023] [ 30.487246] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.488123] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.489114] Call Trace: [ 30.489443] [ 30.489727] dump_stack_lvl+0x91/0xf0 [ 30.490224] print_report+0xcc/0x620 [ 30.490710] ? __virt_addr_valid+0x102/0x340 [ 30.491274] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.491911] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.492532] kasan_report+0xbe/0xf0 [ 30.493008] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.493632] vma_interval_tree_remove+0xc75/0xec0 [ 30.494243] vma_prepare+0xc54/0x11a0 [ 30.494731] __split_vma+0x5af/0x950 [ 30.495216] ? __pfx___split_vma+0x10/0x10 [ 30.495754] ? find_held_lock+0x2c/0x110 [ 30.496276] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.496840] ? lock_is_held_type+0x9f/0x120 [ 30.497386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.498002] ? mtree_range_walk+0x632/0x900 [ 30.498564] ? mas_walk+0x5c7/0x7c0 [ 30.499066] do_vmi_munmap+0x1f1/0x2b0 [ 30.499559] mmap_region+0x1f9/0x2660 [ 30.500040] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.500563] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.501286] ? __pfx_lock_acquire+0x10/0x10 [ 30.501822] ? __pfx_mmap_region+0x10/0x10 [ 30.502353] ? security_mmap_addr+0x7d/0xa0 [ 30.502902] ? get_unmapped_area+0x1f5/0x3f0 [ 30.503465] do_mmap+0x854/0xf00 [ 30.503909] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.504415] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.504983] ksys_mmap_pgoff+0x3af/0x500 [ 30.505494] do_syscall_64+0x3f/0x90 [ 30.505974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.506626] RIP: 0033:0x7f11bee0ed82 [ 30.507098] 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 [ 30.509215] RSP: 002b:00007ffdcb266748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.510119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11bee0ed82 [ 30.511135] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11be248000 [ 30.512007] RBP: 00007f11be248000 R08: 0000000000000009 R09: 0000000000001000 [ 30.512862] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592d5143980 [ 30.513734] R13: 00007ffdcb266760 R14: 00007ffdcb266790 R15: 00007ffdcb266af0 [ 30.514598] [ 30.514899] [ 30.515120] Allocated by task 214: [ 30.515550] kasan_save_stack+0x22/0x50 [ 30.516056] kasan_set_track+0x25/0x30 [ 30.516559] __kasan_slab_alloc+0x59/0x70 [ 30.517082] kmem_cache_alloc+0x16b/0x370 [ 30.517599] vm_area_dup+0x20/0x160 [ 30.518058] __split_vma+0x170/0x950 [ 30.518523] split_vma+0xc6/0x110 [ 30.518993] mprotect_fixup+0x8d2/0xb30 [ 30.519512] do_mprotect_pkey+0x87e/0xd40 [ 30.520065] __x64_sys_mprotect+0x78/0xc0 [ 30.520623] do_syscall_64+0x3f/0x90 [ 30.521130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.521809] [ 30.522035] Freed by task 214: [ 30.522456] kasan_save_stack+0x22/0x50 [ 30.522992] kasan_set_track+0x25/0x30 [ 30.523519] kasan_save_free_info+0x2b/0x50 [ 30.524085] __kasan_slab_free+0x10a/0x190 [ 30.524643] kmem_cache_free+0x10d/0x4d0 [ 30.525177] rcu_core+0x8c8/0x2860 [ 30.525650] __do_softirq+0x1b7/0x7d4 [ 30.526161] [ 30.526392] Last potentially related work creation: [ 30.527025] kasan_save_stack+0x22/0x50 [ 30.527554] __kasan_record_aux_stack+0x8e/0xa0 [ 30.528165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.528842] remove_vma+0x139/0x170 [ 30.529326] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.529920] do_vmi_munmap+0x1f1/0x2b0 [ 30.530434] __vm_munmap+0x138/0x3a0 [ 30.530947] __x64_sys_munmap+0x59/0x80 [ 30.531467] do_syscall_64+0x3f/0x90 [ 30.531964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.532650] [ 30.532879] The buggy address belongs to the object at ffff88800f2ce000 [ 30.532879] which belongs to the cache vm_area_struct of size 168 [ 30.534462] The buggy address is located 88 bytes inside of [ 30.534462] freed 168-byte region [ffff88800f2ce000, ffff88800f2ce0a8) [ 30.535920] [ 30.536143] The buggy address belongs to the physical page: [ 30.536822] page:0000000056f9e86c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2ce [ 30.537933] memcg:ffff888009bfef01 [ 30.538385] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.539090] page_type: 0xffffffff() [ 30.539573] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.540519] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009bfef01 [ 30.541461] page dumped because: kasan: bad access detected [ 30.542177] [ 30.542395] Memory state around the buggy address: [ 30.542997] ffff88800f2cdf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.543858] ffff88800f2cdf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.544726] >ffff88800f2ce000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.545647] ^ [ 30.546546] ffff88800f2ce080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.547614] ffff88800f2ce100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.548656] ================================================================== [ 30.550275] Disabling lock debugging due to kernel taint [ 32.628795] BUG: Bad rss-counter state mm:000000008cd26852 type:MM_FILEPAGES val:33 [ 32.629736] BUG: Bad rss-counter state mm:000000008cd26852 type:MM_ANONPAGES val:22 [ 33.173682] BUG: Bad rss-counter state mm:0000000036bb0036 type:MM_FILEPAGES val:33 [ 33.174849] BUG: Bad rss-counter state mm:0000000036bb0036 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28414' (ECDSA) to the list of known hosts. 2023/06/21 08:13:10 fuzzer started 2023/06/21 08:13:10 dialing manager at localhost:36067 2023/06/21 08:13:10 checking machine... 2023/06/21 08:13:10 checking revisions... [ 33.801231] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:13:10 testing simple program... [ 33.849783] cgroup: Unknown subsys name 'net' [ 33.891592] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:13:10 Registers: info registers vcpu 0 RAX=ffffffff81808857 RBX=0000000000000003 RCX=0000000000000001 RDX=0000000000000cc0 RSI=000000000000000d RDI=ffff8880168f7af8 RBP=dffffc0000000000 RSP=ffff8880168f7a50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000d R13=0000000000000cc0 R14=ffff8880168f7ae0 R15=0000000000000cc0 RIP=ffffffff813ad625 RFL=00000287 [--S--PC] 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 00007f08c1454900 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=00007f08c1a0c0b0 CR3=0000000009470000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007f7997fd5000 CR3=0000000013ab6000 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=4e7acea999000489f740f646713ef948 XMM02=2c67c8bc2e329bc3000000000011a5f0 XMM03=fb795ef6d65770560000000000121b68 XMM04=6598e6d79ddd625400000000000ae988 XMM05=e4cb8bb95a7664b600000000001319a8 XMM06=c77e9a39b5a43f690000000000130810 XMM07=e042d86d42eb936e0000000000121de8 XMM08=26f64da680f885fe000000000011a650 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000