syzkaller login: [ 114.999794] BUG: Bad rss-counter state mm:000000007806c356 type:MM_FILEPAGES val:33 [ 115.001806] BUG: Bad rss-counter state mm:000000007806c356 type:MM_ANONPAGES val:22 [ 115.168900] ================================================================== [ 115.170052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 115.171040] Read of size 8 at addr ffff88801a846ed8 by task sshd/227 [ 115.171898] [ 115.172120] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 115.173132] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 115.174155] Call Trace: [ 115.174473] [ 115.174759] dump_stack_lvl+0x91/0xf0 [ 115.175252] print_report+0xcc/0x620 [ 115.175733] ? __virt_addr_valid+0x102/0x340 [ 115.176281] ? vma_interval_tree_remove+0xc75/0xec0 [ 115.176912] ? vma_interval_tree_remove+0xc75/0xec0 [ 115.177538] kasan_report+0xbe/0xf0 [ 115.178017] ? vma_interval_tree_remove+0xc75/0xec0 [ 115.178637] vma_interval_tree_remove+0xc75/0xec0 [ 115.179244] vma_prepare+0xc54/0x11a0 [ 115.179720] __split_vma+0x5af/0x950 [ 115.180196] ? __pfx___split_vma+0x10/0x10 [ 115.180717] ? find_held_lock+0x2c/0x110 [ 115.181237] do_vmi_align_munmap+0x2ba/0x11f0 [ 115.181822] ? lock_is_held_type+0x9f/0x120 [ 115.182354] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 115.182955] ? mtree_range_walk+0x632/0x900 [ 115.183504] ? mas_walk+0x5c7/0x7c0 [ 115.183970] do_vmi_munmap+0x1f1/0x2b0 [ 115.184458] mmap_region+0x1f9/0x2660 [ 115.184936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 115.185446] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 115.186159] ? __pfx_lock_acquire+0x10/0x10 [ 115.186684] ? __pfx_mmap_region+0x10/0x10 [ 115.187208] ? security_mmap_addr+0x7d/0xa0 [ 115.187733] ? get_unmapped_area+0x1f5/0x3f0 [ 115.188274] do_mmap+0x854/0xf00 [ 115.188711] vm_mmap_pgoff+0x1a6/0x3a0 [ 115.189208] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 115.189784] ksys_mmap_pgoff+0x3af/0x500 [ 115.190286] do_syscall_64+0x3f/0x90 [ 115.190767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 115.191410] RIP: 0033:0x7ff303a2dd82 [ 115.191861] 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 [ 115.193962] RSP: 002b:00007fff275d4f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 115.194859] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff303a2dd82 [ 115.195696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff302e67000 [ 115.196528] RBP: 00007ff302e67000 R08: 0000000000000009 R09: 0000000000001000 [ 115.197376] R10: 0000000000000812 R11: 0000000000000206 R12: 000056021ce22d90 [ 115.198224] R13: 00007fff275d4fb0 R14: 00007fff275d4fe0 R15: 00007fff275d5340 [ 115.199077] [ 115.199363] [ 115.199575] Allocated by task 219: [ 115.200007] kasan_save_stack+0x22/0x50 [ 115.200508] kasan_set_track+0x25/0x30 [ 115.200995] __kasan_slab_alloc+0x59/0x70 [ 115.201529] kmem_cache_alloc+0x16b/0x370 [ 115.202041] vm_area_dup+0x20/0x160 [ 115.202494] __split_vma+0x170/0x950 [ 115.202958] split_vma+0xc6/0x110 [ 115.203394] mprotect_fixup+0x8d2/0xb30 [ 115.203897] do_mprotect_pkey+0x87e/0xd40 [ 115.204411] __x64_sys_mprotect+0x78/0xc0 [ 115.204933] do_syscall_64+0x3f/0x90 [ 115.205408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 115.206046] [ 115.206258] Freed by task 219: [ 115.206645] kasan_save_stack+0x22/0x50 [ 115.207146] kasan_set_track+0x25/0x30 [ 115.207636] kasan_save_free_info+0x2b/0x50 [ 115.208164] __kasan_slab_free+0x10a/0x190 [ 115.208688] kmem_cache_free+0x10d/0x4d0 [ 115.209190] rcu_core+0x8c8/0x2860 [ 115.209647] __do_softirq+0x1b7/0x7d4 [ 115.210122] [ 115.210337] Last potentially related work creation: [ 115.210916] kasan_save_stack+0x22/0x50 [ 115.211420] __kasan_record_aux_stack+0x8e/0xa0 [ 115.211994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 115.212631] remove_vma+0x139/0x170 [ 115.213079] do_vmi_align_munmap+0xd4a/0x11f0 [ 115.213639] do_vmi_munmap+0x1f1/0x2b0 [ 115.214128] __vm_munmap+0x138/0x3a0 [ 115.214594] __x64_sys_munmap+0x59/0x80 [ 115.215085] do_syscall_64+0x3f/0x90 [ 115.215556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 115.216190] [ 115.216402] The buggy address belongs to the object at ffff88801a846e80 [ 115.216402] which belongs to the cache vm_area_struct of size 168 [ 115.217842] The buggy address is located 88 bytes inside of [ 115.217842] freed 168-byte region [ffff88801a846e80, ffff88801a846f28) [ 115.219221] [ 115.219437] The buggy address belongs to the physical page: [ 115.220087] page:00000000b96e7964 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a846 [ 115.221162] memcg:ffff888019fbd901 [ 115.221606] flags: 0x100000000000200(slab|node=0|zone=1) [ 115.222239] page_type: 0xffffffff() [ 115.222684] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 115.223597] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fbd901 [ 115.224486] page dumped because: kasan: bad access detected [ 115.225140] [ 115.225361] Memory state around the buggy address: [ 115.225938] ffff88801a846d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 115.226789] ffff88801a846e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 115.227638] >ffff88801a846e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 115.228499] ^ [ 115.229233] ffff88801a846f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 115.230100] ffff88801a846f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 115.230955] ================================================================== [ 115.231961] Disabling lock debugging due to kernel taint [ 117.191897] BUG: Bad rss-counter state mm:000000002792440f type:MM_FILEPAGES val:33 [ 117.193158] BUG: Bad rss-counter state mm:000000002792440f type:MM_ANONPAGES val:22 [ 117.722787] BUG: Bad rss-counter state mm:00000000c0ed152a type:MM_FILEPAGES val:33 [ 117.724013] BUG: Bad rss-counter state mm:00000000c0ed152a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36491' (ECDSA) to the list of known hosts. 2023/06/20 07:55:59 fuzzer started 2023/06/20 07:56:00 dialing manager at localhost:44161 2023/06/20 07:56:00 checking machine... 2023/06/20 07:56:00 checking revisions... [ 118.482936] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:56:00 testing simple program... [ 118.541460] cgroup: Unknown subsys name 'net' [ 118.578545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:55:13 Registers: info registers vcpu 0 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff8153425b RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888014737ef0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=000000000000002f R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180eff3 RFL=00000083 [--S---C] 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 00007fefbd966700 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=00007f197e371990 CR3=0000000015d7c000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34323937332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343239 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff8118ddc3 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffff88806cf09fb8 RDI=ffffffff8118ddc3 RBP=ffffffff8118ddc3 RSP=ffff88806cf09a38 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888016ae1b40 R15=ffff88800e87e2e0 RIP=ffffffff811fc7be RFL=00000282 [--S----] 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 00007f205a791900 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=00007fffb6cdd000 CR3=000000000e9b0000 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=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