syzkaller login: [ 31.591302] BUG: Bad rss-counter state mm:000000006290ce2b type:MM_FILEPAGES val:33 [ 31.592665] BUG: Bad rss-counter state mm:000000006290ce2b type:MM_ANONPAGES val:22 [ 31.746084] ================================================================== [ 31.747060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.748042] Read of size 8 at addr ffff888009002d08 by task sshd/220 [ 31.748923] [ 31.749145] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.750038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.751071] Call Trace: [ 31.751429] [ 31.751742] dump_stack_lvl+0x91/0xf0 [ 31.752229] print_report+0xcc/0x620 [ 31.752722] ? __virt_addr_valid+0x102/0x340 [ 31.753286] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.753927] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.754590] kasan_report+0xbe/0xf0 [ 31.755085] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.755732] vma_interval_tree_remove+0xc75/0xec0 [ 31.756343] vma_prepare+0xc54/0x11a0 [ 31.756825] __split_vma+0x5af/0x950 [ 31.757295] ? __pfx___split_vma+0x10/0x10 [ 31.757835] ? find_held_lock+0x2c/0x110 [ 31.758365] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.758937] ? lock_is_held_type+0x9f/0x120 [ 31.759483] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.760113] ? mtree_range_walk+0x632/0x900 [ 31.760666] ? mas_walk+0x5c7/0x7c0 [ 31.761145] do_vmi_munmap+0x1f1/0x2b0 [ 31.761636] mmap_region+0x1f9/0x2660 [ 31.762126] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.762634] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.763376] ? __pfx_lock_acquire+0x10/0x10 [ 31.763946] ? __pfx_mmap_region+0x10/0x10 [ 31.764482] ? security_mmap_addr+0x7d/0xa0 [ 31.765014] ? get_unmapped_area+0x1f5/0x3f0 [ 31.765566] do_mmap+0x854/0xf00 [ 31.766003] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.766505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.767071] ksys_mmap_pgoff+0x3af/0x500 [ 31.767592] do_syscall_64+0x3f/0x90 [ 31.768069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.768725] RIP: 0033:0x7f25aeb3bd82 [ 31.769182] 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 [ 31.771307] RSP: 002b:00007ffc29df7688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.772227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25aeb3bd82 [ 31.773075] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25adf75000 [ 31.773927] RBP: 00007f25adf75000 R08: 0000000000000009 R09: 0000000000001000 [ 31.774776] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1eaa58ec0 [ 31.775630] R13: 00007ffc29df76a0 R14: 00007ffc29df76d0 R15: 00007ffc29df7a30 [ 31.776476] [ 31.776770] [ 31.776987] Allocated by task 213: [ 31.777412] kasan_save_stack+0x22/0x50 [ 31.777918] kasan_set_track+0x25/0x30 [ 31.778413] __kasan_slab_alloc+0x59/0x70 [ 31.778935] kmem_cache_alloc+0x16b/0x370 [ 31.779449] vm_area_dup+0x20/0x160 [ 31.779915] __split_vma+0x170/0x950 [ 31.780379] split_vma+0xc6/0x110 [ 31.780821] mprotect_fixup+0x8d2/0xb30 [ 31.781321] do_mprotect_pkey+0x87e/0xd40 [ 31.781842] __x64_sys_mprotect+0x78/0xc0 [ 31.782361] do_syscall_64+0x3f/0x90 [ 31.782841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.783485] [ 31.783717] Freed by task 213: [ 31.784108] kasan_save_stack+0x22/0x50 [ 31.784616] kasan_set_track+0x25/0x30 [ 31.785107] kasan_save_free_info+0x2b/0x50 [ 31.785637] __kasan_slab_free+0x10a/0x190 [ 31.786167] kmem_cache_free+0x10d/0x4d0 [ 31.786675] rcu_core+0x8c8/0x2860 [ 31.787118] __do_softirq+0x1b7/0x7d4 [ 31.787600] [ 31.787818] Last potentially related work creation: [ 31.788412] kasan_save_stack+0x22/0x50 [ 31.788922] __kasan_record_aux_stack+0x8e/0xa0 [ 31.789497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.790139] remove_vma+0x139/0x170 [ 31.790601] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.791166] do_vmi_munmap+0x1f1/0x2b0 [ 31.791671] __vm_munmap+0x138/0x3a0 [ 31.792137] __x64_sys_munmap+0x59/0x80 [ 31.792646] do_syscall_64+0x3f/0x90 [ 31.793121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.793765] [ 31.793982] The buggy address belongs to the object at ffff888009002cb0 [ 31.793982] which belongs to the cache vm_area_struct of size 168 [ 31.795442] The buggy address is located 88 bytes inside of [ 31.795442] freed 168-byte region [ffff888009002cb0, ffff888009002d58) [ 31.796862] [ 31.797083] The buggy address belongs to the physical page: [ 31.797757] page:00000000cdaaadad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9002 [ 31.798839] memcg:ffff88800e6d4c01 [ 31.799272] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.799931] page_type: 0xffffffff() [ 31.800382] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.801310] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6d4c01 [ 31.802217] page dumped because: kasan: bad access detected [ 31.802883] [ 31.803101] Memory state around the buggy address: [ 31.803691] ffff888009002c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.804550] ffff888009002c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.805408] >ffff888009002d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.806269] ^ [ 31.806712] ffff888009002d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.807569] ffff888009002e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.808486] ================================================================== [ 31.809559] Disabling lock debugging due to kernel taint [ 33.951372] BUG: Bad rss-counter state mm:000000008178fad1 type:MM_FILEPAGES val:33 [ 33.952364] BUG: Bad rss-counter state mm:000000008178fad1 type:MM_ANONPAGES val:22 [ 34.330197] BUG: Bad rss-counter state mm:0000000009449814 type:MM_FILEPAGES val:33 [ 34.331297] BUG: Bad rss-counter state mm:0000000009449814 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19632' (ECDSA) to the list of known hosts. 2023/06/19 18:40:51 fuzzer started 2023/06/19 18:40:52 dialing manager at localhost:44161 2023/06/19 18:40:52 checking machine... 2023/06/19 18:40:52 checking revisions... [ 35.095051] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:40:52 testing simple program... [ 35.144725] cgroup: Unknown subsys name 'net' [ 35.250810] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:40:51 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=1ffff11003954ee3 RCX=ffffffff812d8ec3 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88801caa76f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180efaf 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 00007f4105ff5900 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=00007f41065aa650 CR3=000000000e354000 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=0000000000000006 RBX=0000000000000001 RCX=ffffffff813ad6cf RDX=000000000000000c RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1cc RSP=ffff88801caa7770 R8 =ffffffff860d68c0 R9 =ffff88801caa7868 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1cc R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000216 [----AP-] 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 00007f4105ff5900 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=00007f41065ad0b0 CR3=000000000e354000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000