syzkaller login: [ 41.419507] BUG: Bad rss-counter state mm:0000000034b490ae type:MM_FILEPAGES val:33 [ 41.420702] BUG: Bad rss-counter state mm:0000000034b490ae type:MM_ANONPAGES val:22 [ 41.591224] ================================================================== [ 41.592238] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.593276] Read of size 8 at addr ffff888016f45ed8 by task sshd/221 [ 41.594323] [ 41.594596] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.595694] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.596938] Call Trace: [ 41.597357] [ 41.597717] dump_stack_lvl+0x91/0xf0 [ 41.598331] print_report+0xcc/0x620 [ 41.598933] ? __virt_addr_valid+0x102/0x340 [ 41.599629] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.600402] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.601187] kasan_report+0xbe/0xf0 [ 41.601797] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.602579] vma_interval_tree_remove+0xc75/0xec0 [ 41.603344] vma_prepare+0xc54/0x11a0 [ 41.603956] __split_vma+0x5af/0x950 [ 41.604553] ? __pfx___split_vma+0x10/0x10 [ 41.605220] ? find_held_lock+0x2c/0x110 [ 41.605903] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.606616] ? lock_is_held_type+0x9f/0x120 [ 41.607299] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.608065] ? mtree_range_walk+0x632/0x900 [ 41.608767] ? mas_walk+0x5c7/0x7c0 [ 41.609377] do_vmi_munmap+0x1f1/0x2b0 [ 41.609999] mmap_region+0x1f9/0x2660 [ 41.610612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.611259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.612165] ? __pfx_lock_acquire+0x10/0x10 [ 41.612839] ? __pfx_mmap_region+0x10/0x10 [ 41.613513] ? security_mmap_addr+0x7d/0xa0 [ 41.614183] ? get_unmapped_area+0x1f5/0x3f0 [ 41.614873] do_mmap+0x854/0xf00 [ 41.615423] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.616044] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.616754] ksys_mmap_pgoff+0x3af/0x500 [ 41.617416] do_syscall_64+0x3f/0x90 [ 41.618016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.618838] RIP: 0033:0x7fdc6e3ccd82 [ 41.619419] 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 [ 41.622004] RSP: 002b:00007ffffae28158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.623184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc6e3ccd82 [ 41.624306] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc6d806000 [ 41.625432] RBP: 00007fdc6d806000 R08: 0000000000000009 R09: 0000000000001000 [ 41.626548] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0ff749f70 [ 41.627657] R13: 00007ffffae28170 R14: 00007ffffae281a0 R15: 00007ffffae28500 [ 41.628797] [ 41.629178] [ 41.629467] Allocated by task 214: [ 41.630014] kasan_save_stack+0x22/0x50 [ 41.630679] kasan_set_track+0x25/0x30 [ 41.631310] __kasan_slab_alloc+0x59/0x70 [ 41.631982] kmem_cache_alloc+0x16b/0x370 [ 41.632663] vm_area_dup+0x20/0x160 [ 41.633266] __split_vma+0x170/0x950 [ 41.633872] split_vma+0xc6/0x110 [ 41.634448] mprotect_fixup+0x8d2/0xb30 [ 41.635098] do_mprotect_pkey+0x87e/0xd40 [ 41.635773] __x64_sys_mprotect+0x78/0xc0 [ 41.636447] do_syscall_64+0x3f/0x90 [ 41.637060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.637899] [ 41.638170] Freed by task 214: [ 41.638673] kasan_save_stack+0x22/0x50 [ 41.639312] kasan_set_track+0x25/0x30 [ 41.639954] kasan_save_free_info+0x2b/0x50 [ 41.640637] __kasan_slab_free+0x10a/0x190 [ 41.641326] kmem_cache_free+0x10d/0x4d0 [ 41.641977] rcu_core+0x8c8/0x2860 [ 41.642551] __do_softirq+0x1b7/0x7d4 [ 41.643156] [ 41.643432] Last potentially related work creation: [ 41.644196] kasan_save_stack+0x22/0x50 [ 41.644854] __kasan_record_aux_stack+0x8e/0xa0 [ 41.645613] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.646448] remove_vma+0x139/0x170 [ 41.647037] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.647768] do_vmi_munmap+0x1f1/0x2b0 [ 41.648387] __vm_munmap+0x138/0x3a0 [ 41.648998] __x64_sys_munmap+0x59/0x80 [ 41.649654] do_syscall_64+0x3f/0x90 [ 41.650259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.651093] [ 41.651366] The buggy address belongs to the object at ffff888016f45e80 [ 41.651366] which belongs to the cache vm_area_struct of size 168 [ 41.653296] The buggy address is located 88 bytes inside of [ 41.653296] freed 168-byte region [ffff888016f45e80, ffff888016f45f28) [ 41.655125] [ 41.655400] The buggy address belongs to the physical page: [ 41.656254] page:00000000d204dfb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f45 [ 41.657692] memcg:ffff88800dfc8c01 [ 41.658241] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.659076] page_type: 0xffffffff() [ 41.659651] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.660834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfc8c01 [ 41.661964] page dumped because: kasan: bad access detected [ 41.662631] [ 41.662855] Memory state around the buggy address: [ 41.663446] ffff888016f45d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.664320] ffff888016f45e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 41.665189] >ffff888016f45e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.666056] ^ [ 41.666782] ffff888016f45f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 41.667650] ffff888016f45f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.668510] ================================================================== [ 41.669528] Disabling lock debugging due to kernel taint [ 42.972730] BUG: Bad rss-counter state mm:0000000027a90cb2 type:MM_FILEPAGES val:33 [ 42.973218] BUG: Bad rss-counter state mm:0000000027a90cb2 type:MM_ANONPAGES val:22 [ 43.468478] BUG: Bad rss-counter state mm:00000000d3eaf9e9 type:MM_FILEPAGES val:33 [ 43.469706] BUG: Bad rss-counter state mm:00000000d3eaf9e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32219' (ECDSA) to the list of known hosts. 2023/06/19 12:22:35 fuzzer started 2023/06/19 12:22:36 dialing manager at localhost:44161 2023/06/19 12:22:36 checking machine... 2023/06/19 12:22:36 checking revisions... [ 44.171209] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:22:36 testing simple program... [ 44.228148] cgroup: Unknown subsys name 'net' [ 44.267117] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:22:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f535640bee0 CR3=000000000d6fc000 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=bac9b33d66651da9f84219b5e28676ae XMM02=ec2efd57dc4c00df000000000011d600 XMM03=e818c2f854561409000000000011d6d0 XMM04=9d6adc657ea3010100000000000ae988 XMM05=83594ee05b8d38950000000000134298 XMM06=65477f49f9ac75c70000000000132a20 XMM07=e042d86d42eb936e00000000001242e8 XMM08=e818c2f854561409000000000011d6d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff810bd047 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88806cf09ab8 RSI=ffffffff810bd047 RDI=ffff88806cf09a70 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000010b67 R12=ffff88806cf09b38 R13=ffff88806cf09ab8 R14=ffff888015d3b680 R15=ffff88806cf09a70 RIP=ffffffff81130641 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 00007f8093b77900 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=00007ffe48972000 CR3=00000000096f2000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000