syzkaller login: [ 28.803098] BUG: Bad rss-counter state mm:00000000e12b9281 type:MM_FILEPAGES val:33 [ 28.804122] BUG: Bad rss-counter state mm:00000000e12b9281 type:MM_ANONPAGES val:22 [ 28.966448] ================================================================== [ 28.967401] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.968345] Read of size 8 at addr ffff88800f2076b0 by task sshd/220 [ 28.969122] [ 28.969343] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.970317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.971325] Call Trace: [ 28.971640] [ 28.971931] dump_stack_lvl+0x91/0xf0 [ 28.972433] print_report+0xcc/0x620 [ 28.972917] ? __virt_addr_valid+0x102/0x340 [ 28.973472] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.974090] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.974747] kasan_report+0xbe/0xf0 [ 28.975232] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.975863] vma_interval_tree_remove+0xc75/0xec0 [ 28.976472] vma_prepare+0xc54/0x11a0 [ 28.976953] __split_vma+0x5af/0x950 [ 28.977424] ? __pfx___split_vma+0x10/0x10 [ 28.977955] ? find_held_lock+0x2c/0x110 [ 28.978477] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.979061] ? lock_is_held_type+0x9f/0x120 [ 28.979606] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.980216] ? mtree_range_walk+0x632/0x900 [ 28.980771] ? mas_walk+0x5c7/0x7c0 [ 28.981247] do_vmi_munmap+0x1f1/0x2b0 [ 28.981742] mmap_region+0x1f9/0x2660 [ 28.982220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.982744] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.983456] ? __pfx_lock_acquire+0x10/0x10 [ 28.984002] ? __pfx_mmap_region+0x10/0x10 [ 28.984532] ? security_mmap_addr+0x7d/0xa0 [ 28.985066] ? get_unmapped_area+0x1f5/0x3f0 [ 28.985609] do_mmap+0x854/0xf00 [ 28.986048] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.986537] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.987114] ksys_mmap_pgoff+0x3af/0x500 [ 28.987619] do_syscall_64+0x3f/0x90 [ 28.988100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.988749] RIP: 0033:0x7f6cb9d8ad82 [ 28.989209] 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 [ 28.991322] RSP: 002b:00007fff0f383a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.992226] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6cb9d8ad82 [ 28.993072] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6cb91c4000 [ 28.993918] RBP: 00007f6cb91c4000 R08: 0000000000000009 R09: 0000000000001000 [ 28.994769] R10: 0000000000000812 R11: 0000000000000206 R12: 000056183ed66ec0 [ 28.995608] R13: 00007fff0f383a30 R14: 00007fff0f383a60 R15: 00007fff0f383dc0 [ 28.996469] [ 28.996765] [ 28.996990] Allocated by task 212: [ 28.997416] kasan_save_stack+0x22/0x50 [ 28.997922] kasan_set_track+0x25/0x30 [ 28.998416] __kasan_slab_alloc+0x59/0x70 [ 28.998964] kmem_cache_alloc+0x16b/0x370 [ 28.999483] vm_area_dup+0x20/0x160 [ 28.999940] __split_vma+0x170/0x950 [ 29.000405] split_vma+0xc6/0x110 [ 29.000846] mprotect_fixup+0x8d2/0xb30 [ 29.001345] do_mprotect_pkey+0x87e/0xd40 [ 29.001869] __x64_sys_mprotect+0x78/0xc0 [ 29.002393] do_syscall_64+0x3f/0x90 [ 29.002877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.003520] [ 29.003738] Freed by task 210: [ 29.004130] kasan_save_stack+0x22/0x50 [ 29.004627] kasan_set_track+0x25/0x30 [ 29.005123] kasan_save_free_info+0x2b/0x50 [ 29.005661] __kasan_slab_free+0x10a/0x190 [ 29.006194] kmem_cache_free+0x10d/0x4d0 [ 29.006725] rcu_core+0x8c8/0x2860 [ 29.007171] __do_softirq+0x1b7/0x7d4 [ 29.007653] [ 29.007869] Last potentially related work creation: [ 29.008457] kasan_save_stack+0x22/0x50 [ 29.008976] __kasan_record_aux_stack+0x8e/0xa0 [ 29.009577] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.010294] remove_vma+0x139/0x170 [ 29.010751] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.011301] do_vmi_munmap+0x1f1/0x2b0 [ 29.011796] __vm_munmap+0x138/0x3a0 [ 29.012268] __x64_sys_munmap+0x59/0x80 [ 29.012779] do_syscall_64+0x3f/0x90 [ 29.013261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.013908] [ 29.014127] The buggy address belongs to the object at ffff88800f207658 [ 29.014127] which belongs to the cache vm_area_struct of size 168 [ 29.015638] The buggy address is located 88 bytes inside of [ 29.015638] freed 168-byte region [ffff88800f207658, ffff88800f207700) [ 29.017053] [ 29.017276] The buggy address belongs to the physical page: [ 29.017942] page:00000000f3ea7dce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf207 [ 29.019117] memcg:ffff888016980901 [ 29.019562] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.020209] page_type: 0xffffffff() [ 29.020657] raw: 0100000000000200 ffff8880087a0c80 ffffea000031dec0 dead000000000006 [ 29.021592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016980901 [ 29.022508] page dumped because: kasan: bad access detected [ 29.023219] [ 29.023436] Memory state around the buggy address: [ 29.024048] ffff88800f207580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.024930] ffff88800f207600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.025788] >ffff88800f207680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.026716] ^ [ 29.027355] ffff88800f207700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 29.028213] ffff88800f207780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.029061] ================================================================== [ 29.030161] Disabling lock debugging due to kernel taint [ 30.989875] BUG: Bad rss-counter state mm:0000000065c82d53 type:MM_FILEPAGES val:33 [ 30.990889] BUG: Bad rss-counter state mm:0000000065c82d53 type:MM_ANONPAGES val:22 [ 31.435482] BUG: Bad rss-counter state mm:000000005be23ca4 type:MM_FILEPAGES val:33 [ 31.436490] BUG: Bad rss-counter state mm:000000005be23ca4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32345' (ECDSA) to the list of known hosts. 2023/06/20 17:00:41 fuzzer started 2023/06/20 17:00:41 dialing manager at localhost:36067 2023/06/20 17:00:41 checking machine... 2023/06/20 17:00:41 checking revisions... [ 32.174895] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:00:42 testing simple program... [ 32.229420] cgroup: Unknown subsys name 'net' [ 32.270103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:00:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801cdff3a0 RCX=0000000000000001 RDX=1ffff110039bfe8a RSI=ffffffff83868346 RDI=ffff88801cdff3ac RBP=ffff88801cdff450 RSP=ffff88801cdff2b8 R8 =0000000000000001 R9 =ffff88801cdff318 R10=0000000000038001 R11=0000000000091ae9 R12=ffff88801cdff3a0 R13=0000000000000000 R14=ffff88801a313680 R15=00000000000928c0 RIP=ffffffff813ad547 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 00007fac24287900 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=00007fac2483e618 CR3=000000001a390000 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=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=00007fc15179cf20 CR3=0000000014596000 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=5827aab4093e24a4904b8c5fc974e593 XMM02=2c67c8bc2e329bc3000000000011d2d8 XMM03=fb795ef6d65770560000000000121250 XMM04=844577e00ecd2d9000000000000ae988 XMM05=19e9129bd510f23500000000001317d0 XMM06=4fda316b135da52b0000000000131658 XMM07=e042d86d42eb936e00000000001214d0 XMM08=2842aebbad70939c000000000011d338 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000