syzkaller login: [ 30.591902] BUG: Bad rss-counter state mm:00000000f45a9cdb type:MM_FILEPAGES val:33 [ 30.593099] BUG: Bad rss-counter state mm:00000000f45a9cdb type:MM_ANONPAGES val:22 [ 30.652524] ================================================================== [ 30.653437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.654401] Read of size 8 at addr ffff888016a96c20 by task sshd/220 [ 30.655297] [ 30.655519] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.656382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.657525] Call Trace: [ 30.657925] [ 30.658269] dump_stack_lvl+0x91/0xf0 [ 30.658870] print_report+0xcc/0x620 [ 30.659464] ? __virt_addr_valid+0x102/0x340 [ 30.660149] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.660910] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.661701] kasan_report+0xbe/0xf0 [ 30.662287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663059] vma_interval_tree_remove+0xc75/0xec0 [ 30.663804] vma_prepare+0xc54/0x11a0 [ 30.664389] __split_vma+0x5af/0x950 [ 30.664969] ? __pfx___split_vma+0x10/0x10 [ 30.665668] ? find_held_lock+0x2c/0x110 [ 30.666206] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.666773] ? lock_is_held_type+0x9f/0x120 [ 30.667313] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.667921] ? mtree_range_walk+0x632/0x900 [ 30.668468] ? mas_walk+0x5c7/0x7c0 [ 30.668941] do_vmi_munmap+0x1f1/0x2b0 [ 30.669455] mmap_region+0x1f9/0x2660 [ 30.669946] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.670460] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.671241] ? __pfx_lock_acquire+0x10/0x10 [ 30.671782] ? __pfx_mmap_region+0x10/0x10 [ 30.672306] ? security_mmap_addr+0x7d/0xa0 [ 30.672844] ? get_unmapped_area+0x1f5/0x3f0 [ 30.673427] do_mmap+0x854/0xf00 [ 30.673891] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.674436] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.675015] ksys_mmap_pgoff+0x3af/0x500 [ 30.675594] do_syscall_64+0x3f/0x90 [ 30.676118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676906] RIP: 0033:0x7fd65c22bd82 [ 30.677487] 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 [ 30.679856] RSP: 002b:00007ffecfc94738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.680762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd65c22bd82 [ 30.681789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd65b665000 [ 30.682866] RBP: 00007fd65b665000 R08: 0000000000000009 R09: 0000000000001000 [ 30.683897] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f988c6ec0 [ 30.684936] R13: 00007ffecfc94750 R14: 00007ffecfc94780 R15: 00007ffecfc94ae0 [ 30.685950] [ 30.686256] [ 30.686476] Allocated by task 213: [ 30.686927] kasan_save_stack+0x22/0x50 [ 30.687453] kasan_set_track+0x25/0x30 [ 30.687964] __kasan_slab_alloc+0x59/0x70 [ 30.688501] kmem_cache_alloc+0x16b/0x370 [ 30.689047] vm_area_dup+0x20/0x160 [ 30.689536] __split_vma+0x170/0x950 [ 30.690023] split_vma+0xc6/0x110 [ 30.690474] mprotect_fixup+0x8d2/0xb30 [ 30.690988] do_mprotect_pkey+0x87e/0xd40 [ 30.691543] __x64_sys_mprotect+0x78/0xc0 [ 30.692077] do_syscall_64+0x3f/0x90 [ 30.692552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.693200] [ 30.693419] Freed by task 213: [ 30.693805] kasan_save_stack+0x22/0x50 [ 30.694431] kasan_set_track+0x25/0x30 [ 30.695017] kasan_save_free_info+0x2b/0x50 [ 30.695679] __kasan_slab_free+0x10a/0x190 [ 30.696417] kmem_cache_free+0x10d/0x4d0 [ 30.697040] rcu_core+0x8c8/0x2860 [ 30.697609] __do_softirq+0x1b7/0x7d4 [ 30.698196] [ 30.698455] Last potentially related work creation: [ 30.699206] kasan_save_stack+0x22/0x50 [ 30.699784] __kasan_record_aux_stack+0x8e/0xa0 [ 30.700387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.701058] remove_vma+0x139/0x170 [ 30.701532] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.702112] do_vmi_munmap+0x1f1/0x2b0 [ 30.702617] __vm_munmap+0x138/0x3a0 [ 30.703110] __x64_sys_munmap+0x59/0x80 [ 30.703621] do_syscall_64+0x3f/0x90 [ 30.704115] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.704779] [ 30.705002] Second to last potentially related work creation: [ 30.705856] kasan_save_stack+0x22/0x50 [ 30.706494] __kasan_record_aux_stack+0x8e/0xa0 [ 30.707215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.707997] remove_vma+0x139/0x170 [ 30.708547] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.709235] do_vmi_munmap+0x1f1/0x2b0 [ 30.709887] mmap_region+0x1f9/0x2660 [ 30.710485] do_mmap+0x854/0xf00 [ 30.710929] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.711409] ksys_mmap_pgoff+0x3af/0x500 [ 30.711906] do_syscall_64+0x3f/0x90 [ 30.712382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.713021] [ 30.713244] The buggy address belongs to the object at ffff888016a96bc8 [ 30.713244] which belongs to the cache vm_area_struct of size 168 [ 30.714779] The buggy address is located 88 bytes inside of [ 30.714779] freed 168-byte region [ffff888016a96bc8, ffff888016a96c70) [ 30.716238] [ 30.716463] The buggy address belongs to the physical page: [ 30.717169] page:0000000032a93ca1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a96 [ 30.718278] memcg:ffff88801a052c01 [ 30.718708] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.719351] page_type: 0xffffffff() [ 30.719809] raw: 0100000000000200 ffff8880087a0c80 ffffea000063d200 dead000000000008 [ 30.720737] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a052c01 [ 30.721667] page dumped because: kasan: bad access detected [ 30.722333] [ 30.722553] Memory state around the buggy address: [ 30.723153] ffff888016a96b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.724035] ffff888016a96b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.724896] >ffff888016a96c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.725816] ^ [ 30.726356] ffff888016a96c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.727224] ffff888016a96d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.728099] ================================================================== [ 30.729049] Disabling lock debugging due to kernel taint [ 33.330725] BUG: Bad rss-counter state mm:00000000004612fc type:MM_FILEPAGES val:33 [ 33.331741] BUG: Bad rss-counter state mm:00000000004612fc type:MM_ANONPAGES val:22 [ 33.854753] BUG: Bad rss-counter state mm:000000008bb92fd0 type:MM_FILEPAGES val:31 [ 33.855735] BUG: Bad rss-counter state mm:000000008bb92fd0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29291' (ECDSA) to the list of known hosts. 2023/06/21 01:46:43 fuzzer started 2023/06/21 01:46:44 dialing manager at localhost:36067 2023/06/21 01:46:44 checking machine... 2023/06/21 01:46:44 checking revisions... [ 34.422629] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:46:44 testing simple program... [ 34.454841] cgroup: Unknown subsys name 'net' [ 34.488328] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:46:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=1ffff11001823b91 RSI=00000000000000eb RDI=ffff88800c11dc88 RBP=ffff88800c211cb0 RSP=ffff8880147df7b0 R8 =ffff88800c211cb0 R9 =0000000000000001 R10=0000000000000000 R11=00000000000b6d53 R12=ffff8880193fc268 R13=ffff88800ffb4000 R14=ffff88800ffb4000 R15=ffff88800c11dc00 RIP=ffffffff81acc85d 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8c8f750900 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=00007f8c8eb55410 CR3=0000000008c6e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4565d9090b7ba64000000000000ae988 XMM05=d2a0d72e57d2d9450000000000134780 XMM06=4fda316b135da52b0000000000133570 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=00007ffc3b9c7b28 CR3=000000000dac6000 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=2033343a36343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a36343a3130203132 XMM08=632022656369767265732e4079747465 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000