syzkaller login: [ 30.587961] BUG: Bad rss-counter state mm:000000007c768c94 type:MM_FILEPAGES val:33 [ 30.590336] BUG: Bad rss-counter state mm:000000007c768c94 type:MM_ANONPAGES val:22 [ 30.751916] ================================================================== [ 30.753008] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.754136] Read of size 8 at addr ffff88800e03fed8 by task sshd/221 [ 30.755204] [ 30.755427] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.756296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.757297] Call Trace: [ 30.757623] [ 30.757909] dump_stack_lvl+0x91/0xf0 [ 30.758413] print_report+0xcc/0x620 [ 30.758914] ? __virt_addr_valid+0x102/0x340 [ 30.759471] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760101] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.760718] kasan_report+0xbe/0xf0 [ 30.761197] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.761843] vma_interval_tree_remove+0xc75/0xec0 [ 30.762465] vma_prepare+0xc54/0x11a0 [ 30.762976] __split_vma+0x5af/0x950 [ 30.763468] ? __pfx___split_vma+0x10/0x10 [ 30.764013] ? find_held_lock+0x2c/0x110 [ 30.764546] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.765130] ? lock_is_held_type+0x9f/0x120 [ 30.765691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.766331] ? mtree_range_walk+0x632/0x900 [ 30.766920] ? mas_walk+0x5c7/0x7c0 [ 30.767401] do_vmi_munmap+0x1f1/0x2b0 [ 30.767901] mmap_region+0x1f9/0x2660 [ 30.768391] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.768927] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.769681] ? __pfx_lock_acquire+0x10/0x10 [ 30.770214] ? __pfx_mmap_region+0x10/0x10 [ 30.770753] ? security_mmap_addr+0x7d/0xa0 [ 30.771301] ? get_unmapped_area+0x1f5/0x3f0 [ 30.771862] do_mmap+0x854/0xf00 [ 30.772308] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.772808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.773399] ksys_mmap_pgoff+0x3af/0x500 [ 30.773911] do_syscall_64+0x3f/0x90 [ 30.774401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.775084] RIP: 0033:0x7fb5fa66bd82 [ 30.775547] 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 [ 30.777724] RSP: 002b:00007fff2f1636b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.778630] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5fa66bd82 [ 30.779497] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5f9aa5000 [ 30.780354] RBP: 00007fb5f9aa5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.781211] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fba5fd6f70 [ 30.782067] R13: 00007fff2f1636d0 R14: 00007fff2f163700 R15: 00007fff2f163a60 [ 30.782942] [ 30.783234] [ 30.783452] Allocated by task 214: [ 30.783886] kasan_save_stack+0x22/0x50 [ 30.784397] kasan_set_track+0x25/0x30 [ 30.784896] __kasan_slab_alloc+0x59/0x70 [ 30.785430] kmem_cache_alloc+0x16b/0x370 [ 30.785952] vm_area_dup+0x20/0x160 [ 30.786417] __split_vma+0x170/0x950 [ 30.786909] split_vma+0xc6/0x110 [ 30.787370] mprotect_fixup+0x8d2/0xb30 [ 30.787874] do_mprotect_pkey+0x87e/0xd40 [ 30.788406] __x64_sys_mprotect+0x78/0xc0 [ 30.788934] do_syscall_64+0x3f/0x90 [ 30.789430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.790085] [ 30.790299] Freed by task 214: [ 30.790706] kasan_save_stack+0x22/0x50 [ 30.791226] kasan_set_track+0x25/0x30 [ 30.791730] kasan_save_free_info+0x2b/0x50 [ 30.792279] __kasan_slab_free+0x10a/0x190 [ 30.792831] kmem_cache_free+0x10d/0x4d0 [ 30.793343] rcu_core+0x8c8/0x2860 [ 30.793799] __do_softirq+0x1b7/0x7d4 [ 30.794279] [ 30.794502] Last potentially related work creation: [ 30.795102] kasan_save_stack+0x22/0x50 [ 30.795628] __kasan_record_aux_stack+0x8e/0xa0 [ 30.796277] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.796938] remove_vma+0x139/0x170 [ 30.797390] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.797956] do_vmi_munmap+0x1f1/0x2b0 [ 30.798440] __vm_munmap+0x138/0x3a0 [ 30.798930] __x64_sys_munmap+0x59/0x80 [ 30.799442] do_syscall_64+0x3f/0x90 [ 30.799925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.800576] [ 30.800791] The buggy address belongs to the object at ffff88800e03fe80 [ 30.800791] which belongs to the cache vm_area_struct of size 168 [ 30.802288] The buggy address is located 88 bytes inside of [ 30.802288] freed 168-byte region [ffff88800e03fe80, ffff88800e03ff28) [ 30.803737] [ 30.803954] The buggy address belongs to the physical page: [ 30.804648] page:00000000d8787f7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe03f [ 30.805737] memcg:ffff88800d035401 [ 30.806177] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.806843] page_type: 0xffffffff() [ 30.807313] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ee00 dead000000000008 [ 30.808271] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d035401 [ 30.809214] page dumped because: kasan: bad access detected [ 30.809894] [ 30.810117] Memory state around the buggy address: [ 30.810728] ffff88800e03fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.811617] ffff88800e03fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.812510] >ffff88800e03fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.813394] ^ [ 30.814131] ffff88800e03ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.815014] ffff88800e03ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.815911] ================================================================== [ 30.816920] Disabling lock debugging due to kernel taint [ 32.875671] BUG: Bad rss-counter state mm:00000000a6fb3c0c type:MM_FILEPAGES val:33 [ 32.876907] BUG: Bad rss-counter state mm:00000000a6fb3c0c type:MM_ANONPAGES val:22 [ 33.252750] BUG: Bad rss-counter state mm:00000000623c67fd type:MM_FILEPAGES val:33 [ 33.254511] BUG: Bad rss-counter state mm:00000000623c67fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60982' (ECDSA) to the list of known hosts. 2023/06/20 19:05:47 fuzzer started 2023/06/20 19:05:47 dialing manager at localhost:36067 2023/06/20 19:05:47 checking machine... 2023/06/20 19:05:47 checking revisions... [ 33.985230] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:05:47 testing simple program... [ 34.034090] cgroup: Unknown subsys name 'net' [ 34.076124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:05:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fdf0000 RSI=ffffffff82157dc3 RDI=ffff88800c725453 RBP=0000562b4b492eb0 RSP=ffff888018f87980 R8 =2878696e755f6d61 R9 =7365733a64687373 R10=73203a296e6f6973 R11=63206e6f69737365 R12=ffff88800c725400 R13=0000562b4b492f03 R14=0000000000000000 R15=ffff888018f87d90 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 00007f60c70f7900 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=00007f60c76ac650 CR3=000000000e83c000 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=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=00007f6b97a1bba0 CR3=000000000d83e000 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=00000000000000000000000000000000 XMM01=32a3c04366d625b73c40e9da01d95af7 XMM02=000000000011cd98ec2efd57dc4c00df XMM03=0000000000121538c099537a7c5b6411 XMM04=ce542f0537b4e19900000000000ae988 XMM05=e4cb8bb95a7664b60000000000131310 XMM06=a5841459250301aa0000000000130178 XMM07=e042d86d42eb936e00000000001217b8 XMM08=c099537a7c5b6411000000000011cdf8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000