syzkaller login: [ 31.090868] BUG: Bad rss-counter state mm:0000000033fee5ed type:MM_FILEPAGES val:33 [ 31.092132] BUG: Bad rss-counter state mm:0000000033fee5ed type:MM_ANONPAGES val:22 [ 31.184385] ================================================================== [ 31.185552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.186554] Read of size 8 at addr ffff88800ee674e0 by task sshd/219 [ 31.187422] [ 31.187647] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.188540] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.189592] Call Trace: [ 31.189917] [ 31.190207] dump_stack_lvl+0x91/0xf0 [ 31.190713] print_report+0xcc/0x620 [ 31.191216] ? __virt_addr_valid+0x102/0x340 [ 31.191778] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.192418] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193049] kasan_report+0xbe/0xf0 [ 31.193554] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194193] vma_interval_tree_remove+0xc75/0xec0 [ 31.194811] vma_prepare+0xc54/0x11a0 [ 31.195310] __split_vma+0x5af/0x950 [ 31.195800] ? __pfx___split_vma+0x10/0x10 [ 31.196348] ? find_held_lock+0x2c/0x110 [ 31.196890] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.197501] ? lock_is_held_type+0x9f/0x120 [ 31.198065] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.198689] ? mtree_range_walk+0x632/0x900 [ 31.199260] ? mas_walk+0x5c7/0x7c0 [ 31.199753] do_vmi_munmap+0x1f1/0x2b0 [ 31.200268] mmap_region+0x1f9/0x2660 [ 31.200771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.201312] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.202053] ? __pfx_lock_acquire+0x10/0x10 [ 31.202599] ? __pfx_mmap_region+0x10/0x10 [ 31.203145] ? security_mmap_addr+0x7d/0xa0 [ 31.203691] ? get_unmapped_area+0x1f5/0x3f0 [ 31.204269] do_mmap+0x854/0xf00 [ 31.204722] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.205244] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.205825] ksys_mmap_pgoff+0x3af/0x500 [ 31.206342] do_syscall_64+0x3f/0x90 [ 31.206836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.207507] RIP: 0033:0x7fbaca238d82 [ 31.207981] 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 [ 31.210200] RSP: 002b:00007ffdd48bcbc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.211133] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbaca238d82 [ 31.212011] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbac9672000 [ 31.212888] RBP: 00007fbac9672000 R08: 0000000000000009 R09: 0000000000001000 [ 31.213773] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a042beaec0 [ 31.214636] R13: 00007ffdd48bcbe0 R14: 00007ffdd48bcc10 R15: 00007ffdd48bcf70 [ 31.215512] [ 31.215804] [ 31.216024] Allocated by task 212: [ 31.216448] kasan_save_stack+0x22/0x50 [ 31.216955] kasan_set_track+0x25/0x30 [ 31.217454] __kasan_slab_alloc+0x59/0x70 [ 31.217993] kmem_cache_alloc+0x16b/0x370 [ 31.218514] vm_area_dup+0x20/0x160 [ 31.218978] __split_vma+0x170/0x950 [ 31.219440] split_vma+0xc6/0x110 [ 31.219884] mprotect_fixup+0x8d2/0xb30 [ 31.220400] do_mprotect_pkey+0x87e/0xd40 [ 31.220916] __x64_sys_mprotect+0x78/0xc0 [ 31.221450] do_syscall_64+0x3f/0x90 [ 31.221926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222577] [ 31.222789] Freed by task 212: [ 31.223187] kasan_save_stack+0x22/0x50 [ 31.223693] kasan_set_track+0x25/0x30 [ 31.224191] kasan_save_free_info+0x2b/0x50 [ 31.224720] __kasan_slab_free+0x10a/0x190 [ 31.225262] kmem_cache_free+0x10d/0x4d0 [ 31.225776] rcu_core+0x8c8/0x2860 [ 31.226220] __do_softirq+0x1b7/0x7d4 [ 31.226697] [ 31.226919] Last potentially related work creation: [ 31.227513] kasan_save_stack+0x22/0x50 [ 31.228017] __kasan_record_aux_stack+0x8e/0xa0 [ 31.228588] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.229233] remove_vma+0x139/0x170 [ 31.229678] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.230241] do_vmi_munmap+0x1f1/0x2b0 [ 31.230726] __vm_munmap+0x138/0x3a0 [ 31.231189] __x64_sys_munmap+0x59/0x80 [ 31.231682] do_syscall_64+0x3f/0x90 [ 31.232154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232791] [ 31.233003] The buggy address belongs to the object at ffff88800ee67488 [ 31.233003] which belongs to the cache vm_area_struct of size 168 [ 31.234469] The buggy address is located 88 bytes inside of [ 31.234469] freed 168-byte region [ffff88800ee67488, ffff88800ee67530) [ 31.235859] [ 31.236080] The buggy address belongs to the physical page: [ 31.236730] page:000000003a971672 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee67 [ 31.237816] memcg:ffff88800db3ee01 [ 31.238241] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.238940] page_type: 0xffffffff() [ 31.239396] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c1040 dead000000000005 [ 31.240304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db3ee01 [ 31.241208] page dumped because: kasan: bad access detected [ 31.241861] [ 31.242077] Memory state around the buggy address: [ 31.242651] ffff88800ee67380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.243500] ffff88800ee67400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.244351] >ffff88800ee67480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.245212] ^ [ 31.245956] ffff88800ee67500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.246807] ffff88800ee67580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.247661] ================================================================== [ 31.248655] Disabling lock debugging due to kernel taint [ 33.156908] BUG: Bad rss-counter state mm:000000001314d044 type:MM_FILEPAGES val:33 [ 33.158294] BUG: Bad rss-counter state mm:000000001314d044 type:MM_ANONPAGES val:22 [ 33.611120] BUG: Bad rss-counter state mm:000000008d696c18 type:MM_FILEPAGES val:33 [ 33.612155] BUG: Bad rss-counter state mm:000000008d696c18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16435' (ECDSA) to the list of known hosts. 2023/06/20 16:29:35 fuzzer started 2023/06/20 16:29:35 dialing manager at localhost:36067 2023/06/20 16:29:35 checking machine... 2023/06/20 16:29:35 checking revisions... [ 34.334249] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:29:35 testing simple program... [ 34.391098] cgroup: Unknown subsys name 'net' [ 34.437882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:29:34 Registers: info registers vcpu 0 RAX=1ffffffff0bb40e6 RBX=ffffffff85da0730 RCX=ffffffff811fbebd RDX=0000000000000000 RSI=ffffffff860ac906 RDI=ffffffff85da0718 RBP=ffffffff85da0718 RSP=ffff88800e1d79e8 R8 =ffffffff860ac906 R9 =ffff88800e1d7ae0 R10=0000000000038001 R11=0000000000009755 R12=ffffffff85da0748 R13=ffffffff85da0718 R14=ffffffff85da0718 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----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 00007f6505d00900 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=00007f65062b7618 CR3=000000000e854000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=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=00007fd8c5a63520 CR3=000000000d84e000 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=d7b250c0ddba6ca03a49f7c6b8b1ffe6 XMM02=000000000011b0c0ec2efd57dc4c00df XMM03=00000000001221b0ea5e0d15b037b51e XMM04=4a13c21160bd8e2f00000000000ae988 XMM05=dfcdbad4f1609c370000000000132030 XMM06=f9e0784eb0ac14770000000000130e98 XMM07=e042d86d42eb936e0000000000122430 XMM08=ea5e0d15b037b51e000000000011b120 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000