syzkaller login: [ 35.695559] BUG: Bad rss-counter state mm:000000006f88ff50 type:MM_FILEPAGES val:33 [ 35.697346] BUG: Bad rss-counter state mm:000000006f88ff50 type:MM_ANONPAGES val:22 [ 35.855707] ================================================================== [ 35.856626] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.857586] Read of size 8 at addr ffff88800db22058 by task sshd/219 [ 35.858468] [ 35.858693] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.859563] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.860589] Call Trace: [ 35.860916] [ 35.861209] dump_stack_lvl+0x91/0xf0 [ 35.861720] print_report+0xcc/0x620 [ 35.862215] ? __virt_addr_valid+0x102/0x340 [ 35.862776] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.863402] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.864044] kasan_report+0xbe/0xf0 [ 35.864536] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.865180] vma_interval_tree_remove+0xc75/0xec0 [ 35.865824] vma_prepare+0xc54/0x11a0 [ 35.866311] __split_vma+0x5af/0x950 [ 35.866799] ? __pfx___split_vma+0x10/0x10 [ 35.867344] ? find_held_lock+0x2c/0x110 [ 35.867888] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.868467] ? lock_is_held_type+0x9f/0x120 [ 35.869016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.869663] ? mtree_range_walk+0x632/0x900 [ 35.870225] ? mas_walk+0x5c7/0x7c0 [ 35.870764] do_vmi_munmap+0x1f1/0x2b0 [ 35.871270] mmap_region+0x1f9/0x2660 [ 35.871761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.872288] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.873023] ? __pfx_lock_acquire+0x10/0x10 [ 35.873619] ? __pfx_mmap_region+0x10/0x10 [ 35.874175] ? security_mmap_addr+0x7d/0xa0 [ 35.874777] ? get_unmapped_area+0x1f5/0x3f0 [ 35.875347] do_mmap+0x854/0xf00 [ 35.875833] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.876348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.876923] ksys_mmap_pgoff+0x3af/0x500 [ 35.877454] do_syscall_64+0x3f/0x90 [ 35.877988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.878692] RIP: 0033:0x7fa6afaaad82 [ 35.879167] 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 [ 35.881361] RSP: 002b:00007ffdf67a7098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.882297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6afaaad82 [ 35.883169] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6aeee4000 [ 35.884041] RBP: 00007fa6aeee4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.884906] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cbedab3ec0 [ 35.885788] R13: 00007ffdf67a70b0 R14: 00007ffdf67a70e0 R15: 00007ffdf67a7440 [ 35.886667] [ 35.886965] [ 35.887188] Allocated by task 212: [ 35.887635] kasan_save_stack+0x22/0x50 [ 35.888155] kasan_set_track+0x25/0x30 [ 35.888660] __kasan_slab_alloc+0x59/0x70 [ 35.889197] kmem_cache_alloc+0x16b/0x370 [ 35.889740] vm_area_dup+0x20/0x160 [ 35.890204] __split_vma+0x170/0x950 [ 35.890683] split_vma+0xc6/0x110 [ 35.891130] mprotect_fixup+0x8d2/0xb30 [ 35.891640] do_mprotect_pkey+0x87e/0xd40 [ 35.892174] __x64_sys_mprotect+0x78/0xc0 [ 35.892707] do_syscall_64+0x3f/0x90 [ 35.893190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.893908] [ 35.894126] Freed by task 212: [ 35.894532] kasan_save_stack+0x22/0x50 [ 35.895044] kasan_set_track+0x25/0x30 [ 35.895560] kasan_save_free_info+0x2b/0x50 [ 35.896107] __kasan_slab_free+0x10a/0x190 [ 35.896653] kmem_cache_free+0x10d/0x4d0 [ 35.897178] rcu_core+0x8c8/0x2860 [ 35.897646] __do_softirq+0x1b7/0x7d4 [ 35.898131] [ 35.898352] Last potentially related work creation: [ 35.898946] kasan_save_stack+0x22/0x50 [ 35.899462] __kasan_record_aux_stack+0x8e/0xa0 [ 35.900047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.900708] remove_vma+0x139/0x170 [ 35.901181] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.901799] do_vmi_munmap+0x1f1/0x2b0 [ 35.902350] __vm_munmap+0x138/0x3a0 [ 35.902846] __x64_sys_munmap+0x59/0x80 [ 35.903370] do_syscall_64+0x3f/0x90 [ 35.903867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.904576] [ 35.904803] The buggy address belongs to the object at ffff88800db22000 [ 35.904803] which belongs to the cache vm_area_struct of size 168 [ 35.906385] The buggy address is located 88 bytes inside of [ 35.906385] freed 168-byte region [ffff88800db22000, ffff88800db220a8) [ 35.907841] [ 35.908063] The buggy address belongs to the physical page: [ 35.908742] page:00000000f992c7c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb22 [ 35.909859] memcg:ffff88800e8ff101 [ 35.910289] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.910959] page_type: 0xffffffff() [ 35.911423] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.912380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8ff101 [ 35.913291] page dumped because: kasan: bad access detected [ 35.913973] [ 35.914190] Memory state around the buggy address: [ 35.914797] ffff88800db21f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.915668] ffff88800db21f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.916530] >ffff88800db22000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.917435] ^ [ 35.918179] ffff88800db22080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.919044] ffff88800db22100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.919908] ================================================================== [ 35.921025] Disabling lock debugging due to kernel taint [ 37.893582] BUG: Bad rss-counter state mm:0000000068b66203 type:MM_FILEPAGES val:33 [ 37.894818] BUG: Bad rss-counter state mm:0000000068b66203 type:MM_ANONPAGES val:22 [ 38.236341] BUG: Bad rss-counter state mm:00000000f2567a30 type:MM_FILEPAGES val:33 [ 38.237713] BUG: Bad rss-counter state mm:00000000f2567a30 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31081' (ECDSA) to the list of known hosts. 2023/06/20 10:25:58 fuzzer started 2023/06/20 10:25:58 dialing manager at localhost:44161 2023/06/20 10:25:58 checking machine... 2023/06/20 10:25:58 checking revisions... [ 38.889938] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:25:58 testing simple program... [ 38.942103] cgroup: Unknown subsys name 'net' [ 38.995929] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:25:53 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=00007fffc3946c08 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=00007f4f5b9b75100000561bd290d790 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=0000000000000007 RBX=ffff8880193264c0 RCX=1ffff11001b6f681 RDX=0000000000000000 RSI=ffffffff87b86f80 RDI=ffff88801cd31684 RBP=ffff88801cd315f0 RSP=ffff88806cf09de8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=0000000000000287 R13=ffffea000064c900 R14=ffffffff818d9dc6 R15=ffff88800d53c680 RIP=ffffffff845135e5 RFL=00000002 [-------] 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 00007f117e0e2900 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=00007fb3cf3e0650 CR3=000000000ca72000 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=326ca7d3a0ae0a4200000000000ae988 XMM05=055eb93092317a2e0000000000135430 XMM06=dfcdbad4f1609c3700000000001342c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000