syzkaller login: [ 31.269499] BUG: Bad rss-counter state mm:000000001266a5d8 type:MM_FILEPAGES val:33 [ 31.270770] BUG: Bad rss-counter state mm:000000001266a5d8 type:MM_ANONPAGES val:22 [ 31.311588] ================================================================== [ 31.312584] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.313546] Read of size 8 at addr ffff88801687e140 by task sshd/219 [ 31.314351] [ 31.314576] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.315491] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.316502] Call Trace: [ 31.316834] [ 31.317128] dump_stack_lvl+0x91/0xf0 [ 31.317629] print_report+0xcc/0x620 [ 31.318122] ? __virt_addr_valid+0x102/0x340 [ 31.318678] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.319312] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.319960] kasan_report+0xbe/0xf0 [ 31.320456] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321098] vma_interval_tree_remove+0xc75/0xec0 [ 31.321703] vma_prepare+0xc54/0x11a0 [ 31.322195] __split_vma+0x5af/0x950 [ 31.322675] ? __pfx___split_vma+0x10/0x10 [ 31.323219] ? find_held_lock+0x2c/0x110 [ 31.323752] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.324320] ? lock_is_held_type+0x9f/0x120 [ 31.324858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.325464] ? mtree_range_walk+0x632/0x900 [ 31.326016] ? mas_walk+0x5c7/0x7c0 [ 31.326497] do_vmi_munmap+0x1f1/0x2b0 [ 31.327004] mmap_region+0x1f9/0x2660 [ 31.327516] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.328037] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.328778] ? __pfx_lock_acquire+0x10/0x10 [ 31.329326] ? __pfx_mmap_region+0x10/0x10 [ 31.329880] ? security_mmap_addr+0x7d/0xa0 [ 31.330445] ? get_unmapped_area+0x1f5/0x3f0 [ 31.331013] do_mmap+0x854/0xf00 [ 31.331476] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.331988] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.332571] ksys_mmap_pgoff+0x3af/0x500 [ 31.333098] do_syscall_64+0x3f/0x90 [ 31.333607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.334277] RIP: 0033:0x7fc479995d82 [ 31.334752] 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 [ 31.337176] RSP: 002b:00007ffebd422518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.338128] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc479995d82 [ 31.339002] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc478dcf000 [ 31.339911] RBP: 00007fc478dcf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.340792] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba8af2cec0 [ 31.341661] R13: 00007ffebd422530 R14: 00007ffebd422560 R15: 00007ffebd4228c0 [ 31.342548] [ 31.342848] [ 31.343088] Allocated by task 212: [ 31.343529] kasan_save_stack+0x22/0x50 [ 31.344039] kasan_set_track+0x25/0x30 [ 31.344540] __kasan_slab_alloc+0x59/0x70 [ 31.345078] kmem_cache_alloc+0x16b/0x370 [ 31.345620] vm_area_dup+0x20/0x160 [ 31.346082] __split_vma+0x170/0x950 [ 31.346559] split_vma+0xc6/0x110 [ 31.347007] mprotect_fixup+0x8d2/0xb30 [ 31.347539] do_mprotect_pkey+0x87e/0xd40 [ 31.348070] __x64_sys_mprotect+0x78/0xc0 [ 31.348602] do_syscall_64+0x3f/0x90 [ 31.349107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.349775] [ 31.349998] Freed by task 212: [ 31.350404] kasan_save_stack+0x22/0x50 [ 31.350913] kasan_set_track+0x25/0x30 [ 31.351439] kasan_save_free_info+0x2b/0x50 [ 31.351999] __kasan_slab_free+0x10a/0x190 [ 31.352557] kmem_cache_free+0x10d/0x4d0 [ 31.353076] rcu_core+0x8c8/0x2860 [ 31.353540] __do_softirq+0x1b7/0x7d4 [ 31.354034] [ 31.354248] Last potentially related work creation: [ 31.354830] kasan_save_stack+0x22/0x50 [ 31.355355] __kasan_record_aux_stack+0x8e/0xa0 [ 31.355921] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.356556] remove_vma+0x139/0x170 [ 31.357007] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.357565] do_vmi_munmap+0x1f1/0x2b0 [ 31.358054] __vm_munmap+0x138/0x3a0 [ 31.358522] __x64_sys_munmap+0x59/0x80 [ 31.359022] do_syscall_64+0x3f/0x90 [ 31.359512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.360152] [ 31.360366] The buggy address belongs to the object at ffff88801687e0e8 [ 31.360366] which belongs to the cache vm_area_struct of size 168 [ 31.361833] The buggy address is located 88 bytes inside of [ 31.361833] freed 168-byte region [ffff88801687e0e8, ffff88801687e190) [ 31.363243] [ 31.363466] The buggy address belongs to the physical page: [ 31.364120] page:0000000064162319 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1687e [ 31.365213] memcg:ffff8880163e5301 [ 31.365638] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.366285] page_type: 0xffffffff() [ 31.366735] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.367673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163e5301 [ 31.368571] page dumped because: kasan: bad access detected [ 31.369223] [ 31.369439] Memory state around the buggy address: [ 31.370020] ffff88801687e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.370891] ffff88801687e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.371767] >ffff88801687e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.372618] ^ [ 31.373254] ffff88801687e180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.374102] ffff88801687e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.374964] ================================================================== [ 31.376048] Disabling lock debugging due to kernel taint [ 34.117376] BUG: Bad rss-counter state mm:000000004ad26142 type:MM_FILEPAGES val:33 [ 34.118439] BUG: Bad rss-counter state mm:000000004ad26142 type:MM_ANONPAGES val:22 [ 34.615163] BUG: Bad rss-counter state mm:00000000e9200ed2 type:MM_FILEPAGES val:33 [ 34.616159] BUG: Bad rss-counter state mm:00000000e9200ed2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59645' (ECDSA) to the list of known hosts. 2023/06/21 07:34:58 fuzzer started 2023/06/21 07:34:58 dialing manager at localhost:36067 2023/06/21 07:34:58 checking machine... 2023/06/21 07:34:58 checking revisions... [ 35.349592] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:34:58 testing simple program... [ 35.392605] cgroup: Unknown subsys name 'net' [ 35.430628] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:34:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=1ffff110012f442e RDX=1ffff110012f443b RSI=0000000000000004 RDI=ffff8880097a21e0 RBP=0000000000001000 RSP=ffff888014347cb8 R8 =0000000000000001 R9 =ffffed10012f4438 R10=ffff8880097a21c3 R11=00000000000b6a61 R12=ffff88800e5a2200 R13=0000000000000000 R14=ffff8880097a2178 R15=ffff8880097a2130 RIP=ffffffff81847455 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 00007ff3b13e9900 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=00007feb095fc650 CR3=000000000d752000 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=e34cd078b3bff5f000000000000ae988 XMM05=b602e8f44f56434600000000001329f0 XMM06=dfcdbad4f1609c370000000000131888 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801b8012b8 RCX=ffffffff81b25890 RDX=ffff88800905b680 RSI=0000000000000008 RDI=ffff88801b8012b8 RBP=00000000000007c6 RSP=ffff8880090bf1e8 R8 =0000000000000004 R9 =00000000000007c6 R10=0000000000001b1f R11=0000000000000128 R12=dffffc0000000000 R13=ffff8880090bf638 R14=0000000000001b1f R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000293 [--S-A-C] 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 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=0000561e4049d768 CR3=0000000019c7c000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000