syzkaller login: [ 34.295666] BUG: Bad rss-counter state mm:00000000725a269d type:MM_FILEPAGES val:33 [ 34.297080] BUG: Bad rss-counter state mm:00000000725a269d type:MM_ANONPAGES val:22 [ 34.332349] ================================================================== [ 34.333442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.334651] Read of size 8 at addr ffff88800ddb4310 by task sshd/220 [ 34.335593] [ 34.335989] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.337288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.338626] Call Trace: [ 34.339082] [ 34.339454] dump_stack_lvl+0x91/0xf0 [ 34.340116] print_report+0xcc/0x620 [ 34.340726] ? __virt_addr_valid+0x102/0x340 [ 34.341503] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.342136] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.342770] kasan_report+0xbe/0xf0 [ 34.343281] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.343913] vma_interval_tree_remove+0xc75/0xec0 [ 34.344534] vma_prepare+0xc54/0x11a0 [ 34.345022] __split_vma+0x5af/0x950 [ 34.345513] ? __pfx___split_vma+0x10/0x10 [ 34.346056] ? find_held_lock+0x2c/0x110 [ 34.346592] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.347181] ? lock_is_held_type+0x9f/0x120 [ 34.347736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.348364] ? mtree_range_walk+0x632/0x900 [ 34.348926] ? mas_walk+0x5c7/0x7c0 [ 34.349410] do_vmi_munmap+0x1f1/0x2b0 [ 34.349922] mmap_region+0x1f9/0x2660 [ 34.350421] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.350973] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.351677] ? __pfx_lock_acquire+0x10/0x10 [ 34.352205] ? __pfx_mmap_region+0x10/0x10 [ 34.352731] ? security_mmap_addr+0x7d/0xa0 [ 34.353258] ? get_unmapped_area+0x1f5/0x3f0 [ 34.353801] do_mmap+0x854/0xf00 [ 34.354239] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.354738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.355299] ksys_mmap_pgoff+0x3af/0x500 [ 34.355805] do_syscall_64+0x3f/0x90 [ 34.356281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.356925] RIP: 0033:0x7fe05e25bd82 [ 34.357383] 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 [ 34.359586] RSP: 002b:00007ffdf6b1ee68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.360507] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe05e25bd82 [ 34.361529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe05d695000 [ 34.362363] RBP: 00007fe05d695000 R08: 0000000000000009 R09: 0000000000001000 [ 34.363220] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe69e69ec0 [ 34.364061] R13: 00007ffdf6b1ee80 R14: 00007ffdf6b1eeb0 R15: 00007ffdf6b1f210 [ 34.364906] [ 34.365195] [ 34.365407] Allocated by task 213: [ 34.365832] kasan_save_stack+0x22/0x50 [ 34.366342] kasan_set_track+0x25/0x30 [ 34.366828] __kasan_slab_alloc+0x59/0x70 [ 34.367376] kmem_cache_alloc+0x16b/0x370 [ 34.367889] vm_area_dup+0x20/0x160 [ 34.368342] __split_vma+0x170/0x950 [ 34.368805] split_vma+0xc6/0x110 [ 34.369259] mprotect_fixup+0x8d2/0xb30 [ 34.369776] do_mprotect_pkey+0x87e/0xd40 [ 34.370308] __x64_sys_mprotect+0x78/0xc0 [ 34.370850] do_syscall_64+0x3f/0x90 [ 34.371350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.372005] [ 34.372228] Freed by task 213: [ 34.372633] kasan_save_stack+0x22/0x50 [ 34.373148] kasan_set_track+0x25/0x30 [ 34.373657] kasan_save_free_info+0x2b/0x50 [ 34.374205] __kasan_slab_free+0x10a/0x190 [ 34.374753] kmem_cache_free+0x10d/0x4d0 [ 34.375294] rcu_core+0x8c8/0x2860 [ 34.375746] __do_softirq+0x1b7/0x7d4 [ 34.376239] [ 34.376461] Last potentially related work creation: [ 34.377068] kasan_save_stack+0x22/0x50 [ 34.377586] __kasan_record_aux_stack+0x8e/0xa0 [ 34.378185] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.378843] remove_vma+0x139/0x170 [ 34.379332] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.379912] do_vmi_munmap+0x1f1/0x2b0 [ 34.380411] __vm_munmap+0x138/0x3a0 [ 34.380889] __x64_sys_munmap+0x59/0x80 [ 34.381412] do_syscall_64+0x3f/0x90 [ 34.381896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.382568] [ 34.382789] The buggy address belongs to the object at ffff88800ddb42b8 [ 34.382789] which belongs to the cache vm_area_struct of size 168 [ 34.384336] The buggy address is located 88 bytes inside of [ 34.384336] freed 168-byte region [ffff88800ddb42b8, ffff88800ddb4360) [ 34.385776] [ 34.385999] The buggy address belongs to the physical page: [ 34.386680] page:000000007af7b00c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddb4 [ 34.387812] memcg:ffff88801463e801 [ 34.388253] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.388918] page_type: 0xffffffff() [ 34.389386] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.390342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801463e801 [ 34.391309] page dumped because: kasan: bad access detected [ 34.391991] [ 34.392212] Memory state around the buggy address: [ 34.392811] ffff88800ddb4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 34.393700] ffff88800ddb4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.394583] >ffff88800ddb4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.395480] ^ [ 34.395959] ffff88800ddb4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.396850] ffff88800ddb4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.397725] ================================================================== [ 34.398768] Disabling lock debugging due to kernel taint [ 36.730669] BUG: Bad rss-counter state mm:0000000056891fc6 type:MM_FILEPAGES val:33 [ 36.731600] BUG: Bad rss-counter state mm:0000000056891fc6 type:MM_ANONPAGES val:22 [ 37.214283] BUG: Bad rss-counter state mm:00000000d5d9ab9c type:MM_FILEPAGES val:33 [ 37.215505] BUG: Bad rss-counter state mm:00000000d5d9ab9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4373' (ECDSA) to the list of known hosts. 2023/06/19 12:38:20 fuzzer started 2023/06/19 12:38:20 dialing manager at localhost:44161 2023/06/19 12:38:20 checking machine... 2023/06/19 12:38:20 checking revisions... [ 37.829054] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:38:20 testing simple program... [ 37.886842] cgroup: Unknown subsys name 'net' [ 37.928992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:38:17 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fff45d16ad8 CR3=0000000005482000 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=00007fd91a3f05100000561c63bf6790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000040 RBX=0000000000000001 RCX=ffffffff8180c521 RDX=0000000000000011 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff88801471f140 R8 =ffffffff86137508 R9 =ffff88801471f238 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000202 [-------] 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 00007fbd222ff900 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=00007f4d2e1d5650 CR3=0000000013b0a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=96be4fc16e1f6ea100000000000ae988 XMM05=67117299d647e9590000000000134d78 XMM06=4fda316b135da52b0000000000133b68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000