syzkaller login: [ 38.729775] BUG: Bad rss-counter state mm:00000000672a39a4 type:MM_FILEPAGES val:33 [ 38.730793] BUG: Bad rss-counter state mm:00000000672a39a4 type:MM_ANONPAGES val:22 [ 38.896227] ================================================================== [ 38.897278] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.898312] Read of size 8 at addr ffff88801a314c20 by task sshd/219 [ 38.899322] [ 38.899565] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.900524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.901648] Call Trace: [ 38.902003] [ 38.902316] dump_stack_lvl+0x91/0xf0 [ 38.902864] print_report+0xcc/0x620 [ 38.903399] ? __virt_addr_valid+0x102/0x340 [ 38.904028] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.904731] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.905429] kasan_report+0xbe/0xf0 [ 38.905958] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906636] vma_interval_tree_remove+0xc75/0xec0 [ 38.907293] vma_prepare+0xc54/0x11a0 [ 38.907816] __split_vma+0x5af/0x950 [ 38.908335] ? __pfx___split_vma+0x10/0x10 [ 38.908918] ? find_held_lock+0x2c/0x110 [ 38.909506] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.910126] ? lock_is_held_type+0x9f/0x120 [ 38.910723] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.911386] ? mtree_range_walk+0x632/0x900 [ 38.911996] ? mas_walk+0x5c7/0x7c0 [ 38.912520] do_vmi_munmap+0x1f1/0x2b0 [ 38.913075] mmap_region+0x1f9/0x2660 [ 38.913606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.914167] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.914944] ? __pfx_lock_acquire+0x10/0x10 [ 38.915526] ? __pfx_mmap_region+0x10/0x10 [ 38.916105] ? security_mmap_addr+0x7d/0xa0 [ 38.916682] ? get_unmapped_area+0x1f5/0x3f0 [ 38.917290] do_mmap+0x854/0xf00 [ 38.917771] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.918310] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.918920] ksys_mmap_pgoff+0x3af/0x500 [ 38.919468] do_syscall_64+0x3f/0x90 [ 38.919996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920703] RIP: 0033:0x7f9c00e8cd82 [ 38.921218] 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 [ 38.923531] RSP: 002b:00007ffdec6d0888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.924545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c00e8cd82 [ 38.925472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c002c6000 [ 38.926393] RBP: 00007f9c002c6000 R08: 0000000000000009 R09: 0000000000001000 [ 38.927308] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca1da7fb20 [ 38.928213] R13: 00007ffdec6d08a0 R14: 00007ffdec6d08d0 R15: 00007ffdec6d0c30 [ 38.929146] [ 38.929462] [ 38.929699] Allocated by task 212: [ 38.930184] kasan_save_stack+0x22/0x50 [ 38.930731] kasan_set_track+0x25/0x30 [ 38.931268] __kasan_slab_alloc+0x59/0x70 [ 38.931854] kmem_cache_alloc+0x16b/0x370 [ 38.932430] vm_area_dup+0x20/0x160 [ 38.932958] __split_vma+0x170/0x950 [ 38.933475] split_vma+0xc6/0x110 [ 38.933952] mprotect_fixup+0x8d2/0xb30 [ 38.934493] do_mprotect_pkey+0x87e/0xd40 [ 38.935064] __x64_sys_mprotect+0x78/0xc0 [ 38.935633] do_syscall_64+0x3f/0x90 [ 38.936154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.936864] [ 38.937104] Freed by task 203: [ 38.937531] kasan_save_stack+0x22/0x50 [ 38.938077] kasan_set_track+0x25/0x30 [ 38.938607] kasan_save_free_info+0x2b/0x50 [ 38.939180] __kasan_slab_free+0x10a/0x190 [ 38.939755] kmem_cache_free+0x10d/0x4d0 [ 38.940350] rcu_core+0x8c8/0x2860 [ 38.940831] __do_softirq+0x1b7/0x7d4 [ 38.941358] [ 38.941594] Last potentially related work creation: [ 38.942224] kasan_save_stack+0x22/0x50 [ 38.942758] __kasan_record_aux_stack+0x8e/0xa0 [ 38.943369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.944054] remove_vma+0x139/0x170 [ 38.944534] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.945147] do_vmi_munmap+0x1f1/0x2b0 [ 38.945674] __vm_munmap+0x138/0x3a0 [ 38.946176] __x64_sys_munmap+0x59/0x80 [ 38.946713] do_syscall_64+0x3f/0x90 [ 38.947228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.947921] [ 38.948153] The buggy address belongs to the object at ffff88801a314bc8 [ 38.948153] which belongs to the cache vm_area_struct of size 168 [ 38.949763] The buggy address is located 88 bytes inside of [ 38.949763] freed 168-byte region [ffff88801a314bc8, ffff88801a314c70) [ 38.951268] [ 38.951499] The buggy address belongs to the physical page: [ 38.952206] page:00000000e56eccd1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a314 [ 38.953378] memcg:ffff88801a2e9a01 [ 38.953831] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.954515] page_type: 0xffffffff() [ 38.955005] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.955995] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2e9a01 [ 38.956979] page dumped because: kasan: bad access detected [ 38.957688] [ 38.957923] Memory state around the buggy address: [ 38.958548] ffff88801a314b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.959461] ffff88801a314b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.960375] >ffff88801a314c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.961294] ^ [ 38.961863] ffff88801a314c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.962775] ffff88801a314d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.963689] ================================================================== [ 38.964760] Disabling lock debugging due to kernel taint [ 41.303857] BUG: Bad rss-counter state mm:000000001631d4a3 type:MM_FILEPAGES val:33 [ 41.304895] BUG: Bad rss-counter state mm:000000001631d4a3 type:MM_ANONPAGES val:22 [ 41.749918] BUG: Bad rss-counter state mm:00000000cead1711 type:MM_FILEPAGES val:33 [ 41.750924] BUG: Bad rss-counter state mm:00000000cead1711 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39978' (ECDSA) to the list of known hosts. 2023/06/20 15:45:50 fuzzer started 2023/06/20 15:45:51 dialing manager at localhost:36067 2023/06/20 15:45:51 checking machine... 2023/06/20 15:45:51 checking revisions... [ 42.548017] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:45:51 testing simple program... [ 42.603598] cgroup: Unknown subsys name 'net' [ 42.650256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:45:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fc3fc48 RCX=0000000000000000 RDX=ffff888016190000 RSI=ffffffff81f73c81 RDI=0000000000000004 RBP=0000000000000001 RSP=ffff88800fc3f9e8 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffff88800fa1b808 R13=0000000000000001 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff814c089b 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 00007fba82622900 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=00007fff75a88000 CR3=000000000eb34000 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=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 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=0000000000000001 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=00007febf9460920 CR3=0000000018214000 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=35343a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000