syzkaller login: [ 29.459532] BUG: Bad rss-counter state mm:0000000080da51f0 type:MM_FILEPAGES val:33 [ 29.461081] BUG: Bad rss-counter state mm:0000000080da51f0 type:MM_ANONPAGES val:22 [ 29.629787] ================================================================== [ 29.630820] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.631808] Read of size 8 at addr ffff8880096a1df0 by task sshd/219 [ 29.632841] [ 29.633072] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.633980] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.635046] Call Trace: [ 29.635384] <TASK> [ 29.635686] dump_stack_lvl+0x91/0xf0 [ 29.636201] print_report+0xcc/0x620 [ 29.636709] ? __virt_addr_valid+0x102/0x340 [ 29.637289] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.637951] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.638609] kasan_report+0xbe/0xf0 [ 29.639117] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.639797] vma_interval_tree_remove+0xc75/0xec0 [ 29.640452] vma_prepare+0xc54/0x11a0 [ 29.640962] __split_vma+0x5af/0x950 [ 29.641458] ? __pfx___split_vma+0x10/0x10 [ 29.642011] ? find_held_lock+0x2c/0x110 [ 29.642581] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.643179] ? lock_is_held_type+0x9f/0x120 [ 29.643742] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.644380] ? mtree_range_walk+0x632/0x900 [ 29.644967] ? mas_walk+0x5c7/0x7c0 [ 29.645466] do_vmi_munmap+0x1f1/0x2b0 [ 29.645989] mmap_region+0x1f9/0x2660 [ 29.646504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.647047] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.647802] ? __pfx_lock_acquire+0x10/0x10 [ 29.648361] ? __pfx_mmap_region+0x10/0x10 [ 29.648912] ? security_mmap_addr+0x7d/0xa0 [ 29.649470] ? get_unmapped_area+0x1f5/0x3f0 [ 29.650045] do_mmap+0x854/0xf00 [ 29.650522] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.651052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.651654] ksys_mmap_pgoff+0x3af/0x500 [ 29.652203] do_syscall_64+0x3f/0x90 [ 29.652711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.653409] RIP: 0033:0x7f731d5c9d82 [ 29.653895] 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 [ 29.656147] RSP: 002b:00007ffd786cbb38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.657103] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f731d5c9d82 [ 29.658009] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f731ca03000 [ 29.658913] RBP: 00007f731ca03000 R08: 0000000000000009 R09: 0000000000001000 [ 29.659804] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f300857ec0 [ 29.660695] R13: 00007ffd786cbb50 R14: 00007ffd786cbb80 R15: 00007ffd786cbee0 [ 29.661599] </TASK> [ 29.661916] [ 29.662144] Allocated by task 212: [ 29.662609] kasan_save_stack+0x22/0x50 [ 29.663148] kasan_set_track+0x25/0x30 [ 29.663666] __kasan_slab_alloc+0x59/0x70 [ 29.664214] kmem_cache_alloc+0x16b/0x370 [ 29.664762] vm_area_dup+0x20/0x160 [ 29.665255] __split_vma+0x170/0x950 [ 29.665742] split_vma+0xc6/0x110 [ 29.666220] mprotect_fixup+0x8d2/0xb30 [ 29.666759] do_mprotect_pkey+0x87e/0xd40 [ 29.667322] __x64_sys_mprotect+0x78/0xc0 [ 29.667882] do_syscall_64+0x3f/0x90 [ 29.668387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.669079] [ 29.669312] Freed by task 212: [ 29.669729] kasan_save_stack+0x22/0x50 [ 29.670263] kasan_set_track+0x25/0x30 [ 29.670791] kasan_save_free_info+0x2b/0x50 [ 29.671358] __kasan_slab_free+0x10a/0x190 [ 29.671921] kmem_cache_free+0x10d/0x4d0 [ 29.672458] rcu_core+0x8c8/0x2860 [ 29.672938] __do_softirq+0x1b7/0x7d4 [ 29.673448] [ 29.673769] Last potentially related work creation: [ 29.674421] kasan_save_stack+0x22/0x50 [ 29.674954] __kasan_record_aux_stack+0x8e/0xa0 [ 29.675575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.676259] remove_vma+0x139/0x170 [ 29.676745] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.677342] do_vmi_munmap+0x1f1/0x2b0 [ 29.677869] __vm_munmap+0x138/0x3a0 [ 29.678368] __x64_sys_munmap+0x59/0x80 [ 29.678909] do_syscall_64+0x3f/0x90 [ 29.679412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.680105] [ 29.680336] Second to last potentially related work creation: [ 29.681060] kasan_save_stack+0x22/0x50 [ 29.681599] __kasan_record_aux_stack+0x8e/0xa0 [ 29.682209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.682918] remove_vma+0x139/0x170 [ 29.683404] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.683997] do_vmi_munmap+0x1f1/0x2b0 [ 29.684510] mmap_region+0x1f9/0x2660 [ 29.685022] do_mmap+0x854/0xf00 [ 29.685484] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.686007] ksys_mmap_pgoff+0x3af/0x500 [ 29.686552] do_syscall_64+0x3f/0x90 [ 29.687052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.687729] [ 29.687958] The buggy address belongs to the object at ffff8880096a1d98 [ 29.687958] which belongs to the cache vm_area_struct of size 168 [ 29.689514] The buggy address is located 88 bytes inside of [ 29.689514] freed 168-byte region [ffff8880096a1d98, ffff8880096a1e40) [ 29.691013] [ 29.691247] The buggy address belongs to the physical page: [ 29.691945] page:00000000b6be77fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96a1 [ 29.693091] memcg:ffff88800df65101 [ 29.693543] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.694222] page_type: 0xffffffff() [ 29.694716] raw: 0100000000000200 ffff88800879fc80 ffffea000038afc0 dead000000000006 [ 29.695691] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df65101 [ 29.696662] page dumped because: kasan: bad access detected [ 29.697366] [ 29.697596] Memory state around the buggy address: [ 29.698219] ffff8880096a1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.699131] ffff8880096a1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.700035] >ffff8880096a1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.700937] ^ [ 29.701797] ffff8880096a1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.702713] ffff8880096a1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.703612] ================================================================== [ 29.704637] Disabling lock debugging due to kernel taint [ 32.141127] BUG: Bad rss-counter state mm:000000004dd7699b type:MM_FILEPAGES val:33 [ 32.142287] BUG: Bad rss-counter state mm:000000004dd7699b type:MM_ANONPAGES val:22 [ 32.523799] BUG: Bad rss-counter state mm:0000000030568aa2 type:MM_FILEPAGES val:33 [ 32.525033] BUG: Bad rss-counter state mm:0000000030568aa2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10225' (ECDSA) to the list of known hosts. 2023/06/19 19:52:21 fuzzer started 2023/06/19 19:52:22 dialing manager at localhost:44161 2023/06/19 19:52:22 checking machine... 2023/06/19 19:52:22 checking revisions... [ 33.184038] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:52:22 testing simple program... [ 33.223978] cgroup: Unknown subsys name 'net' [ 33.293945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:52:16 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000004f4c34ee RCX=ffff88806ca1a770 RDX=000000000000000e RSI=0000000000000001 RDI=000000007d1fcd23 RBP=ffff888008da57c0 RSP=ffff88800da87a20 R8 =00000000bba225d2 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000dc0 R14=ffff88800da87a88 R15=000000000000000e RIP=ffffffff82270f13 RFL=00000206 [-----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 00007fe6ef947900 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=00007fe6efefc650 CR3=000000000e31a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf39500 RCX=0000000000000000 RDX=1ffff1100d9e72a1 RSI=0000000000000008 RDI=ffff88806cf39504 RBP=1ffff110011caf6d RSP=ffff888008e57b60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff888008c58400 R12=ffff88806cf39508 R13=ffff88806cf39510 R14=0000000000000000 R15=000000000000058e RIP=ffffffff812e00a3 RFL=00000012 [----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 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=00007ffc02e14b28 CR3=000000000c510000 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=32353a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303236 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000