syzkaller login: [ 30.275530] BUG: Bad rss-counter state mm:00000000b376d1ee type:MM_FILEPAGES val:33 [ 30.276742] BUG: Bad rss-counter state mm:00000000b376d1ee type:MM_ANONPAGES val:22 [ 30.316042] ================================================================== [ 30.317004] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.318040] Read of size 8 at addr ffff888018198880 by task sshd/220 [ 30.318803] [ 30.319024] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.319917] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.320885] Call Trace: [ 30.321204] [ 30.321488] dump_stack_lvl+0x91/0xf0 [ 30.321982] print_report+0xcc/0x620 [ 30.322462] ? __virt_addr_valid+0x102/0x340 [ 30.323008] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.323638] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324250] kasan_report+0xbe/0xf0 [ 30.324725] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.325355] vma_interval_tree_remove+0xc75/0xec0 [ 30.325960] vma_prepare+0xc54/0x11a0 [ 30.326445] __split_vma+0x5af/0x950 [ 30.326925] ? __pfx___split_vma+0x10/0x10 [ 30.327454] ? find_held_lock+0x2c/0x110 [ 30.327970] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.328545] ? lock_is_held_type+0x9f/0x120 [ 30.329088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.329695] ? mtree_range_walk+0x632/0x900 [ 30.330250] ? mas_walk+0x5c7/0x7c0 [ 30.330724] do_vmi_munmap+0x1f1/0x2b0 [ 30.331224] mmap_region+0x1f9/0x2660 [ 30.331744] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.332252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.332961] ? __pfx_lock_acquire+0x10/0x10 [ 30.333502] ? __pfx_mmap_region+0x10/0x10 [ 30.334034] ? security_mmap_addr+0x7d/0xa0 [ 30.334566] ? get_unmapped_area+0x1f5/0x3f0 [ 30.335115] do_mmap+0x854/0xf00 [ 30.335561] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.336065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.336639] ksys_mmap_pgoff+0x3af/0x500 [ 30.337182] do_syscall_64+0x3f/0x90 [ 30.337669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.338318] RIP: 0033:0x7fe33bbe7d82 [ 30.338780] 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 [ 30.340935] RSP: 002b:00007fffdb9499e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.341846] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe33bbe7d82 [ 30.342704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe33b021000 [ 30.343583] RBP: 00007fe33b021000 R08: 0000000000000009 R09: 0000000000001000 [ 30.344447] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555fc7ebbec0 [ 30.345304] R13: 00007fffdb949a00 R14: 00007fffdb949a30 R15: 00007fffdb949d90 [ 30.346176] [ 30.346466] [ 30.346682] Allocated by task 213: [ 30.347121] kasan_save_stack+0x22/0x50 [ 30.347641] kasan_set_track+0x25/0x30 [ 30.348138] __kasan_slab_alloc+0x59/0x70 [ 30.348671] kmem_cache_alloc+0x16b/0x370 [ 30.349186] vm_area_dup+0x20/0x160 [ 30.349647] __split_vma+0x170/0x950 [ 30.350117] split_vma+0xc6/0x110 [ 30.350559] mprotect_fixup+0x8d2/0xb30 [ 30.351063] do_mprotect_pkey+0x87e/0xd40 [ 30.351612] __x64_sys_mprotect+0x78/0xc0 [ 30.352136] do_syscall_64+0x3f/0x90 [ 30.352611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353263] [ 30.353477] Freed by task 213: [ 30.353875] kasan_save_stack+0x22/0x50 [ 30.354384] kasan_set_track+0x25/0x30 [ 30.354880] kasan_save_free_info+0x2b/0x50 [ 30.355428] __kasan_slab_free+0x10a/0x190 [ 30.355971] kmem_cache_free+0x10d/0x4d0 [ 30.356486] rcu_core+0x8c8/0x2860 [ 30.356931] __do_softirq+0x1b7/0x7d4 [ 30.357407] [ 30.357634] Last potentially related work creation: [ 30.358242] kasan_save_stack+0x22/0x50 [ 30.358747] __kasan_record_aux_stack+0x8e/0xa0 [ 30.359319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.359960] remove_vma+0x139/0x170 [ 30.360418] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.360981] do_vmi_munmap+0x1f1/0x2b0 [ 30.361470] __vm_munmap+0x138/0x3a0 [ 30.361935] __x64_sys_munmap+0x59/0x80 [ 30.362429] do_syscall_64+0x3f/0x90 [ 30.362903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.363572] [ 30.363784] The buggy address belongs to the object at ffff888018198828 [ 30.363784] which belongs to the cache vm_area_struct of size 168 [ 30.365256] The buggy address is located 88 bytes inside of [ 30.365256] freed 168-byte region [ffff888018198828, ffff8880181988d0) [ 30.366667] [ 30.366883] The buggy address belongs to the physical page: [ 30.367553] page:00000000a4a6fe73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18198 [ 30.368652] memcg:ffff88800c848901 [ 30.369081] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.369739] page_type: 0xffffffff() [ 30.370189] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.371108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c848901 [ 30.372035] page dumped because: kasan: bad access detected [ 30.372702] [ 30.372917] Memory state around the buggy address: [ 30.373495] ffff888018198780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.374360] ffff888018198800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.375209] >ffff888018198880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.376085] ^ [ 30.376505] ffff888018198900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.377367] ffff888018198980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.378217] ================================================================== [ 30.379349] Disabling lock debugging due to kernel taint [ 33.062332] BUG: Bad rss-counter state mm:0000000054f3d3d0 type:MM_FILEPAGES val:33 [ 33.063343] BUG: Bad rss-counter state mm:0000000054f3d3d0 type:MM_ANONPAGES val:22 [ 33.550182] BUG: Bad rss-counter state mm:0000000090a84969 type:MM_FILEPAGES val:33 [ 33.551301] BUG: Bad rss-counter state mm:0000000090a84969 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63246' (ECDSA) to the list of known hosts. 2023/06/20 19:08:31 fuzzer started 2023/06/20 19:08:31 dialing manager at localhost:36067 2023/06/20 19:08:31 checking machine... 2023/06/20 19:08:31 checking revisions... [ 34.284828] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:08:31 testing simple program... [ 34.336421] cgroup: Unknown subsys name 'net' [ 34.373606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:08:31 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff110013cef07 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888009e77818 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b935 RFL=00000247 [---Z-PC] 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 00007fc8c6b1f900 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=00007fc8c70d4650 CR3=000000000ec92000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81810727 RSP=ffff88806cf09de8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=ffffea00005b7600 R14=ffffffff813782f8 R15=ffff888016dd8cf0 RIP=ffffffff815343fe RFL=00000047 [---Z-PC] 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=00007fff75f37448 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=00007f73637cc51000005576d5dbb790 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