syzkaller login: [ 31.547847] BUG: Bad rss-counter state mm:00000000282a6e9b type:MM_FILEPAGES val:33 [ 31.548859] BUG: Bad rss-counter state mm:00000000282a6e9b type:MM_ANONPAGES val:22 [ 31.712189] ================================================================== [ 31.713257] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.714260] Read of size 8 at addr ffff8880102924e0 by task sshd/221 [ 31.715231] [ 31.715447] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.716285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.717263] Call Trace: [ 31.717577] [ 31.717851] dump_stack_lvl+0x91/0xf0 [ 31.718331] print_report+0xcc/0x620 [ 31.718803] ? __virt_addr_valid+0x102/0x340 [ 31.719345] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.719944] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.720545] kasan_report+0xbe/0xf0 [ 31.721009] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.721633] vma_interval_tree_remove+0xc75/0xec0 [ 31.722227] vma_prepare+0xc54/0x11a0 [ 31.722701] __split_vma+0x5af/0x950 [ 31.723169] ? __pfx___split_vma+0x10/0x10 [ 31.723690] ? find_held_lock+0x2c/0x110 [ 31.724201] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.724758] ? lock_is_held_type+0x9f/0x120 [ 31.725297] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.725894] ? mtree_range_walk+0x632/0x900 [ 31.726442] ? mas_walk+0x5c7/0x7c0 [ 31.726915] do_vmi_munmap+0x1f1/0x2b0 [ 31.727401] mmap_region+0x1f9/0x2660 [ 31.727877] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.728377] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.729079] ? __pfx_lock_acquire+0x10/0x10 [ 31.729612] ? __pfx_mmap_region+0x10/0x10 [ 31.730131] ? security_mmap_addr+0x7d/0xa0 [ 31.730651] ? get_unmapped_area+0x1f5/0x3f0 [ 31.731191] do_mmap+0x854/0xf00 [ 31.731624] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.732112] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.732660] ksys_mmap_pgoff+0x3af/0x500 [ 31.733160] do_syscall_64+0x3f/0x90 [ 31.733654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.734290] RIP: 0033:0x7f4c2c957d82 [ 31.734743] 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 [ 31.736817] RSP: 002b:00007ffdf4c15ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.737718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c2c957d82 [ 31.738541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c2bd91000 [ 31.739364] RBP: 00007f4c2bd91000 R08: 0000000000000009 R09: 0000000000001000 [ 31.740192] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563accf79f60 [ 31.741012] R13: 00007ffdf4c15bc0 R14: 00007ffdf4c15bf0 R15: 00007ffdf4c15f50 [ 31.741862] [ 31.742153] [ 31.742363] Allocated by task 214: [ 31.742785] kasan_save_stack+0x22/0x50 [ 31.743281] kasan_set_track+0x25/0x30 [ 31.743769] __kasan_slab_alloc+0x59/0x70 [ 31.744288] kmem_cache_alloc+0x16b/0x370 [ 31.744799] vm_area_dup+0x20/0x160 [ 31.745253] __split_vma+0x170/0x950 [ 31.745713] split_vma+0xc6/0x110 [ 31.746144] mprotect_fixup+0x8d2/0xb30 [ 31.746632] do_mprotect_pkey+0x87e/0xd40 [ 31.747142] __x64_sys_mprotect+0x78/0xc0 [ 31.747656] do_syscall_64+0x3f/0x90 [ 31.748117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.748745] [ 31.748957] Freed by task 214: [ 31.749350] kasan_save_stack+0x22/0x50 [ 31.749842] kasan_set_track+0x25/0x30 [ 31.750328] kasan_save_free_info+0x2b/0x50 [ 31.750854] __kasan_slab_free+0x10a/0x190 [ 31.751381] kmem_cache_free+0x10d/0x4d0 [ 31.751883] rcu_core+0x8c8/0x2860 [ 31.752324] __do_softirq+0x1b7/0x7d4 [ 31.752797] [ 31.753012] Last potentially related work creation: [ 31.753599] kasan_save_stack+0x22/0x50 [ 31.754098] __kasan_record_aux_stack+0x8e/0xa0 [ 31.754656] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.755283] remove_vma+0x139/0x170 [ 31.755728] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.756352] do_vmi_munmap+0x1f1/0x2b0 [ 31.756834] __vm_munmap+0x138/0x3a0 [ 31.757303] __x64_sys_munmap+0x59/0x80 [ 31.757795] do_syscall_64+0x3f/0x90 [ 31.758268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.758901] [ 31.759112] The buggy address belongs to the object at ffff888010292488 [ 31.759112] which belongs to the cache vm_area_struct of size 168 [ 31.760542] The buggy address is located 88 bytes inside of [ 31.760542] freed 168-byte region [ffff888010292488, ffff888010292530) [ 31.761928] [ 31.762140] The buggy address belongs to the physical page: [ 31.762795] page:00000000c6479de1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10292 [ 31.763859] memcg:ffff88800d9d9a01 [ 31.764282] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.764920] page_type: 0xffffffff() [ 31.765376] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.766274] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9d9a01 [ 31.767161] page dumped because: kasan: bad access detected [ 31.767811] [ 31.768025] Memory state around the buggy address: [ 31.768587] ffff888010292380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.769429] ffff888010292400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.770262] >ffff888010292480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.771096] ^ [ 31.771855] ffff888010292500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.772685] ffff888010292580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.773523] ================================================================== [ 31.774417] Disabling lock debugging due to kernel taint [ 33.626494] BUG: Bad rss-counter state mm:00000000915c41b0 type:MM_FILEPAGES val:33 [ 33.627500] BUG: Bad rss-counter state mm:00000000915c41b0 type:MM_ANONPAGES val:22 [ 34.114877] BUG: Bad rss-counter state mm:00000000edbb1250 type:MM_FILEPAGES val:33 [ 34.116031] BUG: Bad rss-counter state mm:00000000edbb1250 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20346' (ECDSA) to the list of known hosts. 2023/06/21 00:51:40 fuzzer started 2023/06/21 00:51:40 dialing manager at localhost:36067 2023/06/21 00:51:40 checking machine... 2023/06/21 00:51:40 checking revisions... [ 34.818637] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:51:40 testing simple program... [ 34.877434] cgroup: Unknown subsys name 'net' [ 34.934727] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:51:40 Registers: info registers vcpu 0 RAX=ffff88800e00e3f9 RBX=dffffc0000000000 RCX=ffffffff812e0135 RDX=1ffff11001c01c80 RSI=ffffffff87b89f80 RDI=ffff88800f064530 RBP=ffff88800e00e3f8 RSP=ffff88806ce09d98 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800f064528 R13=fffffbfff0f713f0 R14=0000000000000000 R15=ffffffff87b89f80 RIP=ffffffff844d2578 RFL=00000046 [---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 00007f506b968900 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=00007f506bf1f618 CR3=000000000e674000 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=ffff888008c04400 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=00007ffd7fc25758 CR3=00000000146b8000 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=2039333a31353a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31353a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000