syzkaller login: [ 30.424584] BUG: Bad rss-counter state mm:00000000a6ce080a type:MM_FILEPAGES val:33 [ 30.426606] BUG: Bad rss-counter state mm:00000000a6ce080a type:MM_ANONPAGES val:22 [ 30.618706] ================================================================== [ 30.619667] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.620672] Read of size 8 at addr ffff888016561d08 by task sshd/219 [ 30.621614] [ 30.621994] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.622912] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.623978] Call Trace: [ 30.624327] [ 30.624637] dump_stack_lvl+0x91/0xf0 [ 30.625154] print_report+0xcc/0x620 [ 30.625673] ? __virt_addr_valid+0x102/0x340 [ 30.626316] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.626975] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.627629] kasan_report+0xbe/0xf0 [ 30.628135] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.628779] vma_interval_tree_remove+0xc75/0xec0 [ 30.629420] vma_prepare+0xc54/0x11a0 [ 30.629950] __split_vma+0x5af/0x950 [ 30.630466] ? __pfx___split_vma+0x10/0x10 [ 30.631024] ? find_held_lock+0x2c/0x110 [ 30.631583] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.632185] ? lock_is_held_type+0x9f/0x120 [ 30.632734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.633387] ? mtree_range_walk+0x632/0x900 [ 30.634004] ? mas_walk+0x5c7/0x7c0 [ 30.634505] do_vmi_munmap+0x1f1/0x2b0 [ 30.635028] mmap_region+0x1f9/0x2660 [ 30.635527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.636096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.636860] ? __pfx_lock_acquire+0x10/0x10 [ 30.637448] ? __pfx_mmap_region+0x10/0x10 [ 30.638048] ? security_mmap_addr+0x7d/0xa0 [ 30.638619] ? get_unmapped_area+0x1f5/0x3f0 [ 30.639207] do_mmap+0x854/0xf00 [ 30.639683] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.640214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.640821] ksys_mmap_pgoff+0x3af/0x500 [ 30.641356] do_syscall_64+0x3f/0x90 [ 30.641889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.642586] RIP: 0033:0x7f3347103d82 [ 30.643082] 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 [ 30.645334] RSP: 002b:00007ffca60ba7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.646329] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3347103d82 [ 30.647227] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f334653d000 [ 30.648123] RBP: 00007f334653d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.649023] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bf025a6ec0 [ 30.649925] R13: 00007ffca60ba7e0 R14: 00007ffca60ba810 R15: 00007ffca60bab70 [ 30.650838] [ 30.651159] [ 30.651378] Allocated by task 212: [ 30.651842] kasan_save_stack+0x22/0x50 [ 30.652379] kasan_set_track+0x25/0x30 [ 30.652914] __kasan_slab_alloc+0x59/0x70 [ 30.653474] kmem_cache_alloc+0x16b/0x370 [ 30.654053] vm_area_dup+0x20/0x160 [ 30.654543] __split_vma+0x170/0x950 [ 30.655043] split_vma+0xc6/0x110 [ 30.655509] mprotect_fixup+0x8d2/0xb30 [ 30.656041] do_mprotect_pkey+0x87e/0xd40 [ 30.656609] __x64_sys_mprotect+0x78/0xc0 [ 30.657168] do_syscall_64+0x3f/0x90 [ 30.657671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658388] [ 30.658635] Freed by task 202: [ 30.659050] kasan_save_stack+0x22/0x50 [ 30.659589] kasan_set_track+0x25/0x30 [ 30.660133] kasan_save_free_info+0x2b/0x50 [ 30.660674] __kasan_slab_free+0x10a/0x190 [ 30.661238] kmem_cache_free+0x10d/0x4d0 [ 30.661797] rcu_core+0x8c8/0x2860 [ 30.662270] __do_softirq+0x1b7/0x7d4 [ 30.662760] [ 30.662997] Last potentially related work creation: [ 30.663606] kasan_save_stack+0x22/0x50 [ 30.664157] __kasan_record_aux_stack+0x8e/0xa0 [ 30.664767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.665448] remove_vma+0x139/0x170 [ 30.665945] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.666538] do_vmi_munmap+0x1f1/0x2b0 [ 30.667041] __vm_munmap+0x138/0x3a0 [ 30.667544] __x64_sys_munmap+0x59/0x80 [ 30.668084] do_syscall_64+0x3f/0x90 [ 30.668590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.669268] [ 30.669528] The buggy address belongs to the object at ffff888016561cb0 [ 30.669528] which belongs to the cache vm_area_struct of size 168 [ 30.671109] The buggy address is located 88 bytes inside of [ 30.671109] freed 168-byte region [ffff888016561cb0, ffff888016561d58) [ 30.672647] [ 30.672897] The buggy address belongs to the physical page: [ 30.673610] page:000000000d6cb81e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16561 [ 30.674767] memcg:ffff888017d54701 [ 30.675240] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.675941] page_type: 0xffffffff() [ 30.676412] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.677410] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d54701 [ 30.678424] page dumped because: kasan: bad access detected [ 30.679133] [ 30.679374] Memory state around the buggy address: [ 30.680006] ffff888016561c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.680923] ffff888016561c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.681877] >ffff888016561d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.682820] ^ [ 30.683287] ffff888016561d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.684211] ffff888016561e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.685118] ================================================================== [ 30.686433] Disabling lock debugging due to kernel taint [ 33.287594] BUG: Bad rss-counter state mm:00000000bce346a5 type:MM_FILEPAGES val:33 [ 33.288887] BUG: Bad rss-counter state mm:00000000bce346a5 type:MM_ANONPAGES val:22 [ 33.722665] BUG: Bad rss-counter state mm:00000000bb4fab2a type:MM_FILEPAGES val:33 [ 33.723684] BUG: Bad rss-counter state mm:00000000bb4fab2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39160' (ECDSA) to the list of known hosts. 2023/06/20 22:14:51 fuzzer started 2023/06/20 22:14:51 dialing manager at localhost:36067 2023/06/20 22:14:51 checking machine... 2023/06/20 22:14:51 checking revisions... [ 34.402336] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:14:51 testing simple program... [ 34.454479] cgroup: Unknown subsys name 'net' [ 34.496644] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:14:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000008e RCX=ffffffff81630d3e RDX=ffff888015c5d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff888016b0f990 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffffea00006a68c0 R13=0000000000000001 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c086b 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 00007ff325c6d700 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=00007fc97f71c0b0 CR3=0000000019624000 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=2030353a34313a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a34313a3232203032 XMM08=69767265733d7373616c63742030733a 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=00007ff50dac59c0 CR3=000000000f0d4000 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=56d8a76df97fc0ad374281548bb7158a XMM02=000000000011a250eff9b2d0a8fce9cb XMM03=000000000011a3202c67c8bc2e329bc3 XMM04=0c5c61432a63130700000000000ae988 XMM05=dfcdbad4f1609c370000000000131580 XMM06=e234db387472f28800000000001303e8 XMM07=e042d86d42eb936e00000000001216d8 XMM08=0ca1d5461da90ed3000000000011a320 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000