syzkaller login: [ 23.861559] BUG: Bad rss-counter state mm:00000000d8fe8e3e type:MM_FILEPAGES val:33 [ 23.862748] BUG: Bad rss-counter state mm:00000000d8fe8e3e type:MM_ANONPAGES val:22 [ 23.905246] ================================================================== [ 23.906309] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.907710] Read of size 8 at addr ffff888018f5e058 by task sshd/218 [ 23.908599] [ 23.908856] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.910259] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.911637] Call Trace: [ 23.912145] [ 23.912532] dump_stack_lvl+0x91/0xf0 [ 23.913186] print_report+0xcc/0x620 [ 23.913925] ? __virt_addr_valid+0x102/0x340 [ 23.914829] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.915694] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.916570] kasan_report+0xbe/0xf0 [ 23.917220] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.918087] vma_interval_tree_remove+0xc75/0xec0 [ 23.918959] vma_prepare+0xc54/0x11a0 [ 23.919579] __split_vma+0x5af/0x950 [ 23.920150] ? __pfx___split_vma+0x10/0x10 [ 23.920782] ? find_held_lock+0x2c/0x110 [ 23.921416] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.922096] ? lock_is_held_type+0x9f/0x120 [ 23.922757] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.923470] ? mtree_range_walk+0x632/0x900 [ 23.924103] ? mas_walk+0x5c7/0x7c0 [ 23.924646] do_vmi_munmap+0x1f1/0x2b0 [ 23.925244] mmap_region+0x1f9/0x2660 [ 23.925798] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.926427] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.927310] ? __pfx_lock_acquire+0x10/0x10 [ 23.927945] ? __pfx_mmap_region+0x10/0x10 [ 23.928578] ? security_mmap_addr+0x7d/0xa0 [ 23.929214] ? get_unmapped_area+0x1f5/0x3f0 [ 23.929871] do_mmap+0x854/0xf00 [ 23.930415] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.931010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.931680] ksys_mmap_pgoff+0x3af/0x500 [ 23.932286] do_syscall_64+0x3f/0x90 [ 23.932866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.933640] RIP: 0033:0x7f15fcbcbd82 [ 23.934179] 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 [ 23.936755] RSP: 002b:00007ffd8b355858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.937826] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15fcbcbd82 [ 23.938885] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15fc005000 [ 23.939909] RBP: 00007f15fc005000 R08: 0000000000000009 R09: 0000000000001000 [ 23.940931] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5af588d90 [ 23.941936] R13: 00007ffd8b355870 R14: 00007ffd8b3558a0 R15: 00007ffd8b355c00 [ 23.942972] [ 23.943329] [ 23.943582] Allocated by task 211: [ 23.944092] kasan_save_stack+0x22/0x50 [ 23.944677] kasan_set_track+0x25/0x30 [ 23.945271] __kasan_slab_alloc+0x59/0x70 [ 23.945960] kmem_cache_alloc+0x16b/0x370 [ 23.946607] vm_area_dup+0x20/0x160 [ 23.947131] __split_vma+0x170/0x950 [ 23.947703] split_vma+0xc6/0x110 [ 23.948217] mprotect_fixup+0x8d2/0xb30 [ 23.948803] do_mprotect_pkey+0x87e/0xd40 [ 23.949425] __x64_sys_mprotect+0x78/0xc0 [ 23.950041] do_syscall_64+0x3f/0x90 [ 23.950601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.951384] [ 23.951636] Freed by task 211: [ 23.952117] kasan_save_stack+0x22/0x50 [ 23.952712] kasan_set_track+0x25/0x30 [ 23.953305] kasan_save_free_info+0x2b/0x50 [ 23.953937] __kasan_slab_free+0x10a/0x190 [ 23.954602] kmem_cache_free+0x10d/0x4d0 [ 23.955222] rcu_core+0x8c8/0x2860 [ 23.955755] __do_softirq+0x1b7/0x7d4 [ 23.956330] [ 23.956583] Last potentially related work creation: [ 23.957286] kasan_save_stack+0x22/0x50 [ 23.957881] __kasan_record_aux_stack+0x8e/0xa0 [ 23.958583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.959347] remove_vma+0x139/0x170 [ 23.959862] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.960534] do_vmi_munmap+0x1f1/0x2b0 [ 23.961107] __vm_munmap+0x138/0x3a0 [ 23.961677] __x64_sys_munmap+0x59/0x80 [ 23.962258] do_syscall_64+0x3f/0x90 [ 23.962849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.963630] [ 23.963878] The buggy address belongs to the object at ffff888018f5e000 [ 23.963878] which belongs to the cache vm_area_struct of size 168 [ 23.965617] The buggy address is located 88 bytes inside of [ 23.965617] freed 168-byte region [ffff888018f5e000, ffff888018f5e0a8) [ 23.967325] [ 23.967575] The buggy address belongs to the physical page: [ 23.968375] page:0000000067188d08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f5e [ 23.969656] memcg:ffff88800e297501 [ 23.970158] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.970927] page_type: 0xffffffff() [ 23.971449] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.972531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e297501 [ 23.973595] page dumped because: kasan: bad access detected [ 23.974390] [ 23.974643] Memory state around the buggy address: [ 23.975310] ffff888018f5df00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 23.976324] ffff888018f5df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.977341] >ffff888018f5e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.978340] ^ [ 23.979176] ffff888018f5e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 23.980189] ffff888018f5e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.981192] ================================================================== [ 23.982349] Disabling lock debugging due to kernel taint [ 25.694764] BUG: Bad rss-counter state mm:00000000251646f6 type:MM_FILEPAGES val:33 [ 25.695631] BUG: Bad rss-counter state mm:00000000251646f6 type:MM_ANONPAGES val:22 [ 26.126363] BUG: Bad rss-counter state mm:00000000afff4698 type:MM_FILEPAGES val:33 [ 26.127488] BUG: Bad rss-counter state mm:00000000afff4698 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59939' (ECDSA) to the list of known hosts. 2023/06/20 14:20:37 fuzzer started 2023/06/20 14:20:37 dialing manager at localhost:36067 2023/06/20 14:20:37 checking machine... 2023/06/20 14:20:37 checking revisions... [ 26.855531] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:20:37 testing simple program... [ 26.897787] cgroup: Unknown subsys name 'net' [ 26.959597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:20:37 Registers: info registers vcpu 0 RAX=0000000005000000 RBX=000055dc25795d00 RCX=000000000000001e RDX=0000000000000950 RSI=000000000000000a RDI=000055dc257a4840 RBP=00007fff8a7ade20 RSP=00007fff8a7addb8 R8 =000055dc257a4822 R9 =00007f2f463debe0 R10=0000000000000100 R11=0000000000000246 R12=00007f2f45e2c900 R13=00007fff8a7ade28 R14=00000000000009ee R15=0000000000000000 RIP=00007f2f4637ba0b RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2f45e2c900 00000000 00000000 GS =0000 0000000000000000 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=00007fff8a7a8000 CR3=000000001b836000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=20646e6120676e6967676f6c20656c62 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000000000000000ffffffffffffffff XMM08=676e6967676f6c20656c62616e452023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007f518c076900 CR3=0000000016f9c000 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=2037333a30323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a30323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000