syzkaller login: [ 38.195598] BUG: Bad rss-counter state mm:00000000909d6105 type:MM_FILEPAGES val:33 [ 38.197306] BUG: Bad rss-counter state mm:00000000909d6105 type:MM_ANONPAGES val:22 [ 38.358803] ================================================================== [ 38.359924] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.361057] Read of size 8 at addr ffff88800f310310 by task sshd/220 [ 38.362122] [ 38.362378] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.363429] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.364569] Call Trace: [ 38.364891] [ 38.365177] dump_stack_lvl+0x91/0xf0 [ 38.365676] print_report+0xcc/0x620 [ 38.366157] ? __virt_addr_valid+0x102/0x340 [ 38.366712] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.367349] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.367991] kasan_report+0xbe/0xf0 [ 38.368492] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.369120] vma_interval_tree_remove+0xc75/0xec0 [ 38.369730] vma_prepare+0xc54/0x11a0 [ 38.370209] __split_vma+0x5af/0x950 [ 38.370682] ? __pfx___split_vma+0x10/0x10 [ 38.371208] ? find_held_lock+0x2c/0x110 [ 38.371762] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.372353] ? lock_is_held_type+0x9f/0x120 [ 38.372892] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.373501] ? mtree_range_walk+0x632/0x900 [ 38.374052] ? mas_walk+0x5c7/0x7c0 [ 38.374527] do_vmi_munmap+0x1f1/0x2b0 [ 38.375021] mmap_region+0x1f9/0x2660 [ 38.375548] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.376068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.376795] ? __pfx_lock_acquire+0x10/0x10 [ 38.377329] ? __pfx_mmap_region+0x10/0x10 [ 38.377872] ? security_mmap_addr+0x7d/0xa0 [ 38.378405] ? get_unmapped_area+0x1f5/0x3f0 [ 38.378957] do_mmap+0x854/0xf00 [ 38.379427] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.379931] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.380518] ksys_mmap_pgoff+0x3af/0x500 [ 38.381033] do_syscall_64+0x3f/0x90 [ 38.381509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.382154] RIP: 0033:0x7f4cf3212d82 [ 38.382611] 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 [ 38.384827] RSP: 002b:00007fff296f4748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.385744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cf3212d82 [ 38.386602] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cf264c000 [ 38.387494] RBP: 00007f4cf264c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.388355] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f246508b20 [ 38.389214] R13: 00007fff296f4760 R14: 00007fff296f4790 R15: 00007fff296f4af0 [ 38.390066] [ 38.390354] [ 38.390571] Allocated by task 213: [ 38.390998] kasan_save_stack+0x22/0x50 [ 38.391535] kasan_set_track+0x25/0x30 [ 38.392038] __kasan_slab_alloc+0x59/0x70 [ 38.392589] kmem_cache_alloc+0x16b/0x370 [ 38.393108] vm_area_dup+0x20/0x160 [ 38.393564] __split_vma+0x170/0x950 [ 38.394031] split_vma+0xc6/0x110 [ 38.394492] mprotect_fixup+0x8d2/0xb30 [ 38.395012] do_mprotect_pkey+0x87e/0xd40 [ 38.395585] __x64_sys_mprotect+0x78/0xc0 [ 38.396117] do_syscall_64+0x3f/0x90 [ 38.396598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.397238] [ 38.397456] Freed by task 203: [ 38.397852] kasan_save_stack+0x22/0x50 [ 38.398365] kasan_set_track+0x25/0x30 [ 38.398868] kasan_save_free_info+0x2b/0x50 [ 38.399441] __kasan_slab_free+0x10a/0x190 [ 38.399994] kmem_cache_free+0x10d/0x4d0 [ 38.400526] rcu_core+0x8c8/0x2860 [ 38.400967] __do_softirq+0x1b7/0x7d4 [ 38.401450] [ 38.401673] Last potentially related work creation: [ 38.402254] kasan_save_stack+0x22/0x50 [ 38.402759] __kasan_record_aux_stack+0x8e/0xa0 [ 38.403468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.404114] remove_vma+0x139/0x170 [ 38.404589] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.405152] do_vmi_munmap+0x1f1/0x2b0 [ 38.405653] __vm_munmap+0x138/0x3a0 [ 38.406118] __x64_sys_munmap+0x59/0x80 [ 38.406629] do_syscall_64+0x3f/0x90 [ 38.407112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.407801] [ 38.408017] The buggy address belongs to the object at ffff88800f3102b8 [ 38.408017] which belongs to the cache vm_area_struct of size 168 [ 38.409512] The buggy address is located 88 bytes inside of [ 38.409512] freed 168-byte region [ffff88800f3102b8, ffff88800f310360) [ 38.410923] [ 38.411144] The buggy address belongs to the physical page: [ 38.411838] page:0000000024da4cfc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf310 [ 38.412947] memcg:ffff88800c7d3901 [ 38.413378] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.414023] page_type: 0xffffffff() [ 38.414470] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.415416] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7d3901 [ 38.416358] page dumped because: kasan: bad access detected [ 38.417016] [ 38.417245] Memory state around the buggy address: [ 38.417824] ffff88800f310200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.418684] ffff88800f310280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.419578] >ffff88800f310300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.420442] ^ [ 38.420906] ffff88800f310380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.421772] ffff88800f310400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.422619] ================================================================== [ 38.423566] Disabling lock debugging due to kernel taint [ 40.663579] BUG: Bad rss-counter state mm:00000000229f6e62 type:MM_FILEPAGES val:33 [ 40.664632] BUG: Bad rss-counter state mm:00000000229f6e62 type:MM_ANONPAGES val:22 [ 41.213030] BUG: Bad rss-counter state mm:0000000077417636 type:MM_FILEPAGES val:33 [ 41.214498] BUG: Bad rss-counter state mm:0000000077417636 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5382' (ECDSA) to the list of known hosts. 2023/06/19 23:49:22 fuzzer started 2023/06/19 23:49:22 dialing manager at localhost:44161 2023/06/19 23:49:22 checking machine... 2023/06/19 23:49:22 checking revisions... [ 41.869811] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:49:22 testing simple program... [ 41.921229] cgroup: Unknown subsys name 'net' [ 41.969617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:49:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000002 RSI=ffffffff81f175b3 RDI=ffff88800def2d22 RBP=ffff88801603d7d8 RSP=ffff8880147478b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff81f175e1 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 00007f508a0b8900 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=00007f8c05a36650 CR3=000000000f5f4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b4aca92bdef6eb0200000000000ae988 XMM05=8b453ea8cabe8f430000000000135518 XMM06=19e9129bd510f2350000000000134378 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffe35090838 CR3=0000000005482000 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=00007fedb94b1510000056059b422790 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