syzkaller login: [ 31.041658] BUG: Bad rss-counter state mm:000000003b0b0316 type:MM_FILEPAGES val:33 [ 31.043055] BUG: Bad rss-counter state mm:000000003b0b0316 type:MM_ANONPAGES val:22 [ 31.215730] ================================================================== [ 31.216669] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.217652] Read of size 8 at addr ffff88800e041a50 by task sshd/220 [ 31.218430] [ 31.218762] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.219651] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.220655] Call Trace: [ 31.221023] [ 31.221313] dump_stack_lvl+0x91/0xf0 [ 31.221808] print_report+0xcc/0x620 [ 31.222309] ? __virt_addr_valid+0x102/0x340 [ 31.222889] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223522] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.224180] kasan_report+0xbe/0xf0 [ 31.224663] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225317] vma_interval_tree_remove+0xc75/0xec0 [ 31.225954] vma_prepare+0xc54/0x11a0 [ 31.226450] __split_vma+0x5af/0x950 [ 31.226962] ? __pfx___split_vma+0x10/0x10 [ 31.227509] ? find_held_lock+0x2c/0x110 [ 31.228085] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.228678] ? lock_is_held_type+0x9f/0x120 [ 31.229254] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.229901] ? mtree_range_walk+0x632/0x900 [ 31.230472] ? mas_walk+0x5c7/0x7c0 [ 31.230986] do_vmi_munmap+0x1f1/0x2b0 [ 31.231515] mmap_region+0x1f9/0x2660 [ 31.232076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.232616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.233373] ? __pfx_lock_acquire+0x10/0x10 [ 31.233937] ? __pfx_mmap_region+0x10/0x10 [ 31.234489] ? security_mmap_addr+0x7d/0xa0 [ 31.235154] ? get_unmapped_area+0x1f5/0x3f0 [ 31.235726] do_mmap+0x854/0xf00 [ 31.236215] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.236730] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.237327] ksys_mmap_pgoff+0x3af/0x500 [ 31.237866] do_syscall_64+0x3f/0x90 [ 31.238359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.239045] RIP: 0033:0x7f856f3a9d82 [ 31.239517] 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 [ 31.241805] RSP: 002b:00007ffe29d184d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.242756] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f856f3a9d82 [ 31.243642] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f856e7e3000 [ 31.244556] RBP: 00007f856e7e3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.245452] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b695edec0 [ 31.246332] R13: 00007ffe29d184f0 R14: 00007ffe29d18520 R15: 00007ffe29d18880 [ 31.247232] [ 31.247535] [ 31.247756] Allocated by task 213: [ 31.248236] kasan_save_stack+0x22/0x50 [ 31.248762] kasan_set_track+0x25/0x30 [ 31.249292] __kasan_slab_alloc+0x59/0x70 [ 31.249845] kmem_cache_alloc+0x16b/0x370 [ 31.250386] vm_area_dup+0x20/0x160 [ 31.250879] __split_vma+0x170/0x950 [ 31.251368] split_vma+0xc6/0x110 [ 31.251832] mprotect_fixup+0x8d2/0xb30 [ 31.252369] do_mprotect_pkey+0x87e/0xd40 [ 31.252940] __x64_sys_mprotect+0x78/0xc0 [ 31.253477] do_syscall_64+0x3f/0x90 [ 31.253980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254652] [ 31.254884] Freed by task 13: [ 31.255282] kasan_save_stack+0x22/0x50 [ 31.255796] kasan_set_track+0x25/0x30 [ 31.256342] kasan_save_free_info+0x2b/0x50 [ 31.256926] __kasan_slab_free+0x10a/0x190 [ 31.257483] kmem_cache_free+0x10d/0x4d0 [ 31.258025] rcu_core+0x8c8/0x2860 [ 31.258485] __do_softirq+0x1b7/0x7d4 [ 31.258994] [ 31.259215] Last potentially related work creation: [ 31.259816] kasan_save_stack+0x22/0x50 [ 31.260367] __kasan_record_aux_stack+0x8e/0xa0 [ 31.260985] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.261661] remove_vma+0x139/0x170 [ 31.262144] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.262720] do_vmi_munmap+0x1f1/0x2b0 [ 31.263241] __vm_munmap+0x138/0x3a0 [ 31.263731] __x64_sys_munmap+0x59/0x80 [ 31.264308] do_syscall_64+0x3f/0x90 [ 31.264942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265701] [ 31.265949] Second to last potentially related work creation: [ 31.266666] kasan_save_stack+0x22/0x50 [ 31.267203] __kasan_record_aux_stack+0x8e/0xa0 [ 31.267806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.268506] remove_vma+0x139/0x170 [ 31.269005] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.269594] do_vmi_munmap+0x1f1/0x2b0 [ 31.270114] mmap_region+0x1f9/0x2660 [ 31.270617] do_mmap+0x854/0xf00 [ 31.271076] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.271593] ksys_mmap_pgoff+0x7d/0x500 [ 31.272127] do_syscall_64+0x3f/0x90 [ 31.272622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.273316] [ 31.273542] The buggy address belongs to the object at ffff88800e0419f8 [ 31.273542] which belongs to the cache vm_area_struct of size 168 [ 31.275100] The buggy address is located 88 bytes inside of [ 31.275100] freed 168-byte region [ffff88800e0419f8, ffff88800e041aa0) [ 31.276590] [ 31.276814] The buggy address belongs to the physical page: [ 31.277513] page:0000000082c92915 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe041 [ 31.278661] memcg:ffff888009829a01 [ 31.279122] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.279771] page_type: 0xffffffff() [ 31.280263] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bef00 dead000000000006 [ 31.281202] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009829a01 [ 31.282132] page dumped because: kasan: bad access detected [ 31.282799] [ 31.283055] Memory state around the buggy address: [ 31.283647] ffff88800e041900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.284542] ffff88800e041980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.285431] >ffff88800e041a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.286305] ^ [ 31.287052] ffff88800e041a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.287923] ffff88800e041b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.288807] ================================================================== [ 31.289816] Disabling lock debugging due to kernel taint [ 33.293461] BUG: Bad rss-counter state mm:000000005c1fd48f type:MM_FILEPAGES val:33 [ 33.294686] BUG: Bad rss-counter state mm:000000005c1fd48f type:MM_ANONPAGES val:22 [ 33.735175] BUG: Bad rss-counter state mm:0000000089528283 type:MM_FILEPAGES val:33 [ 33.736444] BUG: Bad rss-counter state mm:0000000089528283 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37208' (ECDSA) to the list of known hosts. 2023/06/20 10:50:47 fuzzer started 2023/06/20 10:50:47 dialing manager at localhost:36067 2023/06/20 10:50:47 checking machine... 2023/06/20 10:50:47 checking revisions... [ 34.483158] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:50:47 testing simple program... [ 34.534870] cgroup: Unknown subsys name 'net' [ 34.574338] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:50:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff88806ce09d68 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b520 R15=0000000000000000 RIP=ffffffff8135b960 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 00007fc87de4e900 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=0000556733958748 CR3=0000000009eec000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=bc3021bf19603b4800000000000ae988 XMM05=f84267fed55ea1d10000000000133cf0 XMM06=4fda316b135da52b0000000000132d90 XMM07=fb795ef6d65770560000000000121ce0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a92574 RBX=ffffffff85d3e490 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff848ff1e0 RDI=ffffffff87b89c40 RBP=ffffffff87b89c40 RSP=ffff8880146e7b60 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff88801691b260 RIP=ffffffff812c19de 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 00007f09824c7900 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=00007f0982a7c650 CR3=0000000016eb6000 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=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