syzkaller login: [ 31.313225] BUG: Bad rss-counter state mm:000000000fd512ff type:MM_FILEPAGES val:33 [ 31.314170] BUG: Bad rss-counter state mm:000000000fd512ff type:MM_ANONPAGES val:22 [ 31.473844] ================================================================== [ 31.474693] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.475571] Read of size 8 at addr ffff888016afab38 by task sshd/219 [ 31.476296] [ 31.476507] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.477529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.478502] Call Trace: [ 31.478823] [ 31.479098] dump_stack_lvl+0x91/0xf0 [ 31.479617] print_report+0xcc/0x620 [ 31.480099] ? __virt_addr_valid+0x102/0x340 [ 31.480643] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.481262] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.481871] kasan_report+0xbe/0xf0 [ 31.482330] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.482938] vma_interval_tree_remove+0xc75/0xec0 [ 31.483545] vma_prepare+0xc54/0x11a0 [ 31.484014] __split_vma+0x5af/0x950 [ 31.484474] ? __pfx___split_vma+0x10/0x10 [ 31.485002] ? find_held_lock+0x2c/0x110 [ 31.485520] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.486071] ? lock_is_held_type+0x9f/0x120 [ 31.486604] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.487197] ? mtree_range_walk+0x632/0x900 [ 31.487737] ? mas_walk+0x5c7/0x7c0 [ 31.488208] do_vmi_munmap+0x1f1/0x2b0 [ 31.488695] mmap_region+0x1f9/0x2660 [ 31.489178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.489687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.490390] ? __pfx_lock_acquire+0x10/0x10 [ 31.490913] ? __pfx_mmap_region+0x10/0x10 [ 31.491429] ? security_mmap_addr+0x7d/0xa0 [ 31.491958] ? get_unmapped_area+0x1f5/0x3f0 [ 31.492492] do_mmap+0x854/0xf00 [ 31.492929] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.493407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.493965] ksys_mmap_pgoff+0x3af/0x500 [ 31.494466] do_syscall_64+0x3f/0x90 [ 31.494941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.495575] RIP: 0033:0x7fbca8ca7d82 [ 31.496023] 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 [ 31.498217] RSP: 002b:00007ffcc8c2ff18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.499361] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbca8ca7d82 [ 31.500465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbca80e1000 [ 31.501581] RBP: 00007fbca80e1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.502703] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599d6580ec0 [ 31.503706] R13: 00007ffcc8c2ff30 R14: 00007ffcc8c2ff60 R15: 00007ffcc8c302c0 [ 31.504820] [ 31.505208] [ 31.505473] Allocated by task 212: [ 31.506030] kasan_save_stack+0x22/0x50 [ 31.506653] kasan_set_track+0x25/0x30 [ 31.507301] __kasan_slab_alloc+0x59/0x70 [ 31.507891] kmem_cache_alloc+0x16b/0x370 [ 31.508469] vm_area_dup+0x20/0x160 [ 31.508989] __split_vma+0x170/0x950 [ 31.509498] split_vma+0xc6/0x110 [ 31.509935] mprotect_fixup+0x8d2/0xb30 [ 31.510435] do_mprotect_pkey+0x87e/0xd40 [ 31.510947] __x64_sys_mprotect+0x78/0xc0 [ 31.511467] do_syscall_64+0x3f/0x90 [ 31.511938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.512593] [ 31.512802] Freed by task 202: [ 31.513196] kasan_save_stack+0x22/0x50 [ 31.513689] kasan_set_track+0x25/0x30 [ 31.514177] kasan_save_free_info+0x2b/0x50 [ 31.514710] __kasan_slab_free+0x10a/0x190 [ 31.515235] kmem_cache_free+0x10d/0x4d0 [ 31.515744] rcu_core+0x8c8/0x2860 [ 31.516188] __do_softirq+0x1b7/0x7d4 [ 31.516664] [ 31.516892] Last potentially related work creation: [ 31.517480] kasan_save_stack+0x22/0x50 [ 31.518155] __kasan_record_aux_stack+0x8e/0xa0 [ 31.518801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.519531] remove_vma+0x139/0x170 [ 31.520027] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.520655] do_vmi_munmap+0x1f1/0x2b0 [ 31.521204] __vm_munmap+0x138/0x3a0 [ 31.521718] __x64_sys_munmap+0x59/0x80 [ 31.522275] do_syscall_64+0x3f/0x90 [ 31.522815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.523536] [ 31.523773] The buggy address belongs to the object at ffff888016afaae0 [ 31.523773] which belongs to the cache vm_area_struct of size 168 [ 31.525415] The buggy address is located 88 bytes inside of [ 31.525415] freed 168-byte region [ffff888016afaae0, ffff888016afab88) [ 31.526967] [ 31.527210] The buggy address belongs to the physical page: [ 31.527952] page:000000008fa0f54f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16afa [ 31.529183] memcg:ffff888016be0401 [ 31.529659] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.530381] page_type: 0xffffffff() [ 31.530884] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.531898] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016be0401 [ 31.532920] page dumped because: kasan: bad access detected [ 31.533657] [ 31.533899] Memory state around the buggy address: [ 31.534552] ffff888016afaa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.535501] ffff888016afaa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.536467] >ffff888016afab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.537411] ^ [ 31.538080] ffff888016afab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.539013] ffff888016afac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.539960] ================================================================== [ 31.540982] Disabling lock debugging due to kernel taint [ 33.359647] BUG: Bad rss-counter state mm:00000000422a368e type:MM_FILEPAGES val:33 [ 33.360390] BUG: Bad rss-counter state mm:00000000422a368e type:MM_ANONPAGES val:22 [ 33.853562] BUG: Bad rss-counter state mm:0000000063029375 type:MM_FILEPAGES val:33 [ 33.854705] BUG: Bad rss-counter state mm:0000000063029375 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1663' (ECDSA) to the list of known hosts. 2023/06/20 22:47:25 fuzzer started 2023/06/20 22:47:26 dialing manager at localhost:36067 2023/06/20 22:47:26 checking machine... 2023/06/20 22:47:26 checking revisions... [ 34.473407] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:47:26 testing simple program... [ 34.520361] cgroup: Unknown subsys name 'net' [ 34.560077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:47:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff8460144a RDI=ffff88806ce09b6c RBP=0000000000000009 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ee1c540 RIP=ffffffff813ad4ee RFL=00000213 [----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 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=00007ffd065212f8 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=00007fd409fce510000055bcc302e790 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=0000000000000000 RBX=ffffffff85652b60 RCX=ffffffff814c84a1 RDX=ffff88800f8eb680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800d7f76d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f4831a0a0a6 R13=0000000000000000 R14=ffff88800f8eb680 R15=0000000000000000 RIP=ffffffff814c02c5 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 00007f4831517900 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=00007ffee968a000 CR3=0000000019dce000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000