syzkaller login: [ 38.723479] BUG: Bad rss-counter state mm:00000000f0a4cf94 type:MM_FILEPAGES val:33 [ 38.724736] BUG: Bad rss-counter state mm:00000000f0a4cf94 type:MM_ANONPAGES val:22 [ 38.870833] ================================================================== [ 38.871798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.872735] Read of size 8 at addr ffff88801a86a6b0 by task sshd/227 [ 38.873509] [ 38.873870] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.874904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.875926] Call Trace: [ 38.876247] [ 38.876543] dump_stack_lvl+0x91/0xf0 [ 38.877045] print_report+0xcc/0x620 [ 38.877543] ? __virt_addr_valid+0x102/0x340 [ 38.878097] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878732] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.879353] kasan_report+0xbe/0xf0 [ 38.879847] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880480] vma_interval_tree_remove+0xc75/0xec0 [ 38.881074] vma_prepare+0xc54/0x11a0 [ 38.881579] __split_vma+0x5af/0x950 [ 38.882050] ? __pfx___split_vma+0x10/0x10 [ 38.882603] ? find_held_lock+0x2c/0x110 [ 38.883156] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.883739] ? lock_is_held_type+0x9f/0x120 [ 38.884272] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.884896] ? mtree_range_walk+0x632/0x900 [ 38.885457] ? mas_walk+0x5c7/0x7c0 [ 38.885937] do_vmi_munmap+0x1f1/0x2b0 [ 38.886446] mmap_region+0x1f9/0x2660 [ 38.886950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.887507] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.888238] ? __pfx_lock_acquire+0x10/0x10 [ 38.888790] ? __pfx_mmap_region+0x10/0x10 [ 38.889317] ? security_mmap_addr+0x7d/0xa0 [ 38.889859] ? get_unmapped_area+0x1f5/0x3f0 [ 38.890406] do_mmap+0x854/0xf00 [ 38.890867] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.891389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.891966] ksys_mmap_pgoff+0x3af/0x500 [ 38.892497] do_syscall_64+0x3f/0x90 [ 38.892983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893654] RIP: 0033:0x7f7242d08d82 [ 38.894111] 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 [ 38.896293] RSP: 002b:00007ffe5ba66638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.897229] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7242d08d82 [ 38.898091] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7242142000 [ 38.898991] RBP: 00007f7242142000 R08: 0000000000000009 R09: 0000000000001000 [ 38.899852] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d34d6efec0 [ 38.900709] R13: 00007ffe5ba66650 R14: 00007ffe5ba66680 R15: 00007ffe5ba669e0 [ 38.901575] [ 38.901872] [ 38.902088] Allocated by task 220: [ 38.902542] kasan_save_stack+0x22/0x50 [ 38.903067] kasan_set_track+0x25/0x30 [ 38.903582] __kasan_slab_alloc+0x59/0x70 [ 38.904105] kmem_cache_alloc+0x16b/0x370 [ 38.904640] vm_area_dup+0x20/0x160 [ 38.905097] __split_vma+0x170/0x950 [ 38.905580] split_vma+0xc6/0x110 [ 38.906020] mprotect_fixup+0x8d2/0xb30 [ 38.906545] do_mprotect_pkey+0x87e/0xd40 [ 38.907086] __x64_sys_mprotect+0x78/0xc0 [ 38.907635] do_syscall_64+0x3f/0x90 [ 38.908124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.908789] [ 38.909003] Freed by task 220: [ 38.909391] kasan_save_stack+0x22/0x50 [ 38.909907] kasan_set_track+0x25/0x30 [ 38.910402] kasan_save_free_info+0x2b/0x50 [ 38.910980] __kasan_slab_free+0x10a/0x190 [ 38.911529] kmem_cache_free+0x10d/0x4d0 [ 38.912040] rcu_core+0x8c8/0x2860 [ 38.912499] __do_softirq+0x1b7/0x7d4 [ 38.912984] [ 38.913204] Last potentially related work creation: [ 38.913822] kasan_save_stack+0x22/0x50 [ 38.914348] __kasan_record_aux_stack+0x8e/0xa0 [ 38.915086] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.915911] remove_vma+0x139/0x170 [ 38.916372] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.916962] do_vmi_munmap+0x1f1/0x2b0 [ 38.917467] __vm_munmap+0x138/0x3a0 [ 38.917933] __x64_sys_munmap+0x59/0x80 [ 38.918433] do_syscall_64+0x3f/0x90 [ 38.918926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.919609] [ 38.919827] Second to last potentially related work creation: [ 38.920519] kasan_save_stack+0x22/0x50 [ 38.921029] __kasan_record_aux_stack+0x8e/0xa0 [ 38.921617] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.922255] remove_vma+0x139/0x170 [ 38.922725] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.923297] do_vmi_munmap+0x1f1/0x2b0 [ 38.923811] mmap_region+0x1f9/0x2660 [ 38.924294] do_mmap+0x854/0xf00 [ 38.924736] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.925225] ksys_mmap_pgoff+0x3af/0x500 [ 38.925743] do_syscall_64+0x3f/0x90 [ 38.926222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926891] [ 38.927136] The buggy address belongs to the object at ffff88801a86a658 [ 38.927136] which belongs to the cache vm_area_struct of size 168 [ 38.928641] The buggy address is located 88 bytes inside of [ 38.928641] freed 168-byte region [ffff88801a86a658, ffff88801a86a700) [ 38.930084] [ 38.930309] The buggy address belongs to the physical page: [ 38.931023] page:000000002ec5339d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a86a [ 38.932146] memcg:ffff88801a868101 [ 38.932589] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.933295] page_type: 0xffffffff() [ 38.933769] raw: 0100000000000200 ffff8880087a0c80 ffffea00006a1780 000000000000000b [ 38.934715] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a868101 [ 38.935692] page dumped because: kasan: bad access detected [ 38.936356] [ 38.936590] Memory state around the buggy address: [ 38.937178] ffff88801a86a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.938074] ffff88801a86a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.938975] >ffff88801a86a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.939892] ^ [ 38.940518] ffff88801a86a700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 38.941405] ffff88801a86a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.942300] ================================================================== [ 38.943462] Disabling lock debugging due to kernel taint [ 40.994816] BUG: Bad rss-counter state mm:00000000c366d5c3 type:MM_FILEPAGES val:33 [ 40.995814] BUG: Bad rss-counter state mm:00000000c366d5c3 type:MM_ANONPAGES val:22 [ 41.621527] BUG: Bad rss-counter state mm:0000000043c159b9 type:MM_FILEPAGES val:33 [ 41.622700] BUG: Bad rss-counter state mm:0000000043c159b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10962' (ECDSA) to the list of known hosts. 2023/06/21 05:39:09 fuzzer started 2023/06/21 05:39:09 dialing manager at localhost:36067 2023/06/21 05:39:09 checking machine... 2023/06/21 05:39:09 checking revisions... [ 42.222604] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:39:09 testing simple program... [ 42.271843] cgroup: Unknown subsys name 'net' [ 42.318251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:39:09 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000080000000 RDX=ffff888009071b40 RSI=ffffffff815a7333 RDI=0000000000000006 RBP=ffff888014347d28 RSP=ffff888014347c58 R8 =0000000000000006 R9 =0000000000000101 R10=0000000000000066 R11=0000000000000000 R12=0000000000000066 R13=ffff888014347d60 R14=0000000000000101 R15=ffffc9000068d3c8 RIP=ffffffff814c0871 RFL=00000212 [----A--] 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 00007f68ffb7a900 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=00007f68ff099008 CR3=000000000c818000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4cfba3c63e96c2c000000000000ae988 XMM05=1203da93d76b16ef0000000000133ca8 XMM06=16bbfc4fa606b62500000000001327d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffff6470000 CR3=000000000e58e000 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=2039303a39333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39333a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000