syzkaller login: [ 31.062824] BUG: Bad rss-counter state mm:00000000b25adcb1 type:MM_FILEPAGES val:33 [ 31.064113] BUG: Bad rss-counter state mm:00000000b25adcb1 type:MM_ANONPAGES val:22 [ 31.228254] ================================================================== [ 31.229223] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.230225] Read of size 8 at addr ffff88801a0d96b0 by task sshd/220 [ 31.231118] [ 31.231358] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.232283] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.233378] Call Trace: [ 31.233728] [ 31.234029] dump_stack_lvl+0x91/0xf0 [ 31.234562] print_report+0xcc/0x620 [ 31.235080] ? __virt_addr_valid+0x102/0x340 [ 31.235669] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236331] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.236986] kasan_report+0xbe/0xf0 [ 31.237489] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.238145] vma_interval_tree_remove+0xc75/0xec0 [ 31.238792] vma_prepare+0xc54/0x11a0 [ 31.239301] __split_vma+0x5af/0x950 [ 31.239804] ? __pfx___split_vma+0x10/0x10 [ 31.240366] ? find_held_lock+0x2c/0x110 [ 31.240926] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.241527] ? lock_is_held_type+0x9f/0x120 [ 31.242102] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.242769] ? mtree_range_walk+0x632/0x900 [ 31.243368] ? mas_walk+0x5c7/0x7c0 [ 31.243889] do_vmi_munmap+0x1f1/0x2b0 [ 31.244424] mmap_region+0x1f9/0x2660 [ 31.244949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.245497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.246273] ? __pfx_lock_acquire+0x10/0x10 [ 31.246847] ? __pfx_mmap_region+0x10/0x10 [ 31.247423] ? security_mmap_addr+0x7d/0xa0 [ 31.247995] ? get_unmapped_area+0x1f5/0x3f0 [ 31.248579] do_mmap+0x854/0xf00 [ 31.249043] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.249568] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.250175] ksys_mmap_pgoff+0x3af/0x500 [ 31.250737] do_syscall_64+0x3f/0x90 [ 31.251251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.251953] RIP: 0033:0x7f0201605d82 [ 31.252445] 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 [ 31.254704] RSP: 002b:00007ffe47233f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.255654] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0201605d82 [ 31.256553] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0200a3f000 [ 31.257466] RBP: 00007f0200a3f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.258400] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9ec792ec0 [ 31.259311] R13: 00007ffe47233f40 R14: 00007ffe47233f70 R15: 00007ffe472342d0 [ 31.260220] [ 31.260530] [ 31.260760] Allocated by task 213: [ 31.261212] kasan_save_stack+0x22/0x50 [ 31.261752] kasan_set_track+0x25/0x30 [ 31.262301] __kasan_slab_alloc+0x59/0x70 [ 31.262867] kmem_cache_alloc+0x16b/0x370 [ 31.263411] vm_area_dup+0x20/0x160 [ 31.263903] __split_vma+0x170/0x950 [ 31.264407] split_vma+0xc6/0x110 [ 31.264888] mprotect_fixup+0x8d2/0xb30 [ 31.265422] do_mprotect_pkey+0x87e/0xd40 [ 31.265984] __x64_sys_mprotect+0x78/0xc0 [ 31.266546] do_syscall_64+0x3f/0x90 [ 31.267061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.267752] [ 31.267979] Freed by task 213: [ 31.268395] kasan_save_stack+0x22/0x50 [ 31.268929] kasan_set_track+0x25/0x30 [ 31.269454] kasan_save_free_info+0x2b/0x50 [ 31.270018] __kasan_slab_free+0x10a/0x190 [ 31.270609] kmem_cache_free+0x10d/0x4d0 [ 31.271156] rcu_core+0x8c8/0x2860 [ 31.271633] __do_softirq+0x1b7/0x7d4 [ 31.272141] [ 31.272368] Last potentially related work creation: [ 31.272996] kasan_save_stack+0x22/0x50 [ 31.273529] __kasan_record_aux_stack+0x8e/0xa0 [ 31.274147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.274842] remove_vma+0x139/0x170 [ 31.275329] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.275929] do_vmi_munmap+0x1f1/0x2b0 [ 31.276451] __vm_munmap+0x138/0x3a0 [ 31.276948] __x64_sys_munmap+0x59/0x80 [ 31.277487] do_syscall_64+0x3f/0x90 [ 31.277996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278700] [ 31.278927] Second to last potentially related work creation: [ 31.279653] kasan_save_stack+0x22/0x50 [ 31.280192] __kasan_record_aux_stack+0x8e/0xa0 [ 31.280806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.281499] remove_vma+0x139/0x170 [ 31.281988] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.282588] do_vmi_munmap+0x1f1/0x2b0 [ 31.283111] __vm_munmap+0x138/0x3a0 [ 31.283618] __x64_sys_munmap+0x59/0x80 [ 31.284150] do_syscall_64+0x3f/0x90 [ 31.284654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285342] [ 31.285575] The buggy address belongs to the object at ffff88801a0d9658 [ 31.285575] which belongs to the cache vm_area_struct of size 168 [ 31.287161] The buggy address is located 88 bytes inside of [ 31.287161] freed 168-byte region [ffff88801a0d9658, ffff88801a0d9700) [ 31.288662] [ 31.288897] The buggy address belongs to the physical page: [ 31.289605] page:000000009c99c99f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0d9 [ 31.290789] memcg:ffff88801a0d5301 [ 31.291241] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.291996] page_type: 0xffffffff() [ 31.292481] raw: 0100000000000200 ffff8880087a0c80 ffffea0000683580 0000000000000003 [ 31.293465] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0d5301 [ 31.294448] page dumped because: kasan: bad access detected [ 31.295163] [ 31.295393] Memory state around the buggy address: [ 31.296007] ffff88801a0d9580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.296923] ffff88801a0d9600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.297840] >ffff88801a0d9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.298763] ^ [ 31.299386] ffff88801a0d9700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.300303] ffff88801a0d9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.301215] ================================================================== [ 31.302312] Disabling lock debugging due to kernel taint [ 33.693492] BUG: Bad rss-counter state mm:00000000ea7dfcc1 type:MM_FILEPAGES val:33 [ 33.695141] BUG: Bad rss-counter state mm:00000000ea7dfcc1 type:MM_ANONPAGES val:22 [ 34.222127] BUG: Bad rss-counter state mm:000000009eefa53e type:MM_FILEPAGES val:33 [ 34.223351] BUG: Bad rss-counter state mm:000000009eefa53e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18399' (ECDSA) to the list of known hosts. 2023/06/20 12:16:11 fuzzer started 2023/06/20 12:16:12 dialing manager at localhost:36067 2023/06/20 12:16:12 checking machine... 2023/06/20 12:16:12 checking revisions... [ 35.031384] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:16:12 testing simple program... [ 35.081252] cgroup: Unknown subsys name 'net' [ 35.125663] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:16:11 Registers: info registers vcpu 0 RAX=00000000d6234f8c RBX=000000009021fb7a RCX=000000004f8cd623 RDX=0000000000000008 RSI=0000000000000001 RDI=000000003585d03f RBP=ffffffff8186b835 RSP=ffff88806ce09b48 R8 =0000000050fc478b R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88806ce09bb0 R15=0000000000000008 RIP=ffffffff82270553 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 00007f67ca4aa700 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=00007f3983e80360 CR3=0000000016320000 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=36313a3231203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36313739342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363137 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863ddeb4 RDX=0000000000000008 RSI=ffff888019f67af0 RDI=ffff888019f67580 RBP=ffff888019f675d8 RSP=ffff888019f67508 R8 =0000000000000001 R9 =ffff888019f675c0 R10=0000000000038001 R11=0000000000091af2 R12=ffff888019f675e0 R13=ffff888019f675c8 R14=ffff888019f67af0 R15=ffff888019f67580 RIP=ffffffff811303fa RFL=00000287 [--S--PC] 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 00007f1fa05e2900 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=00007f1fa0b99618 CR3=000000001a256000 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=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