syzkaller login: [ 44.039326] BUG: Bad rss-counter state mm:0000000030d68fcf type:MM_FILEPAGES val:33 [ 44.040524] BUG: Bad rss-counter state mm:0000000030d68fcf type:MM_ANONPAGES val:22 [ 44.162349] ================================================================== [ 44.163085] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.163819] Read of size 8 at addr ffff888016510880 by task sshd/221 [ 44.164413] [ 44.164596] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.165267] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.166110] Call Trace: [ 44.166366] [ 44.166603] dump_stack_lvl+0x91/0xf0 [ 44.166994] print_report+0xcc/0x620 [ 44.167376] ? __virt_addr_valid+0x102/0x340 [ 44.167818] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.168293] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.168783] kasan_report+0xbe/0xf0 [ 44.169160] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.169652] vma_interval_tree_remove+0xc75/0xec0 [ 44.170134] vma_prepare+0xc54/0x11a0 [ 44.170530] __split_vma+0x5af/0x950 [ 44.170915] ? __pfx___split_vma+0x10/0x10 [ 44.171332] ? find_held_lock+0x2c/0x110 [ 44.171747] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.172188] ? lock_is_held_type+0x9f/0x120 [ 44.172617] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.173101] ? mtree_range_walk+0x632/0x900 [ 44.173532] ? mas_walk+0x5c7/0x7c0 [ 44.173909] do_vmi_munmap+0x1f1/0x2b0 [ 44.174293] mmap_region+0x1f9/0x2660 [ 44.174684] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.175101] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.175663] ? __pfx_lock_acquire+0x10/0x10 [ 44.176082] ? __pfx_mmap_region+0x10/0x10 [ 44.176504] ? security_mmap_addr+0x7d/0xa0 [ 44.176928] ? get_unmapped_area+0x1f5/0x3f0 [ 44.177364] do_mmap+0x854/0xf00 [ 44.177707] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.178106] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.178569] ksys_mmap_pgoff+0x3af/0x500 [ 44.178972] do_syscall_64+0x3f/0x90 [ 44.179344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.179855] RIP: 0033:0x7feeac0abd82 [ 44.180217] 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 [ 44.181906] RSP: 002b:00007fff64ae7e08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.182637] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feeac0abd82 [ 44.183307] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feeab4e5000 [ 44.183969] RBP: 00007feeab4e5000 R08: 0000000000000009 R09: 0000000000001000 [ 44.184633] R10: 0000000000000812 R11: 0000000000000206 R12: 000056130f654ec0 [ 44.185305] R13: 00007fff64ae7e20 R14: 00007fff64ae7e50 R15: 00007fff64ae81b0 [ 44.185975] [ 44.186206] [ 44.186380] Allocated by task 214: [ 44.186735] kasan_save_stack+0x22/0x50 [ 44.187136] kasan_set_track+0x25/0x30 [ 44.187529] __kasan_slab_alloc+0x59/0x70 [ 44.187941] kmem_cache_alloc+0x16b/0x370 [ 44.188355] vm_area_dup+0x20/0x160 [ 44.188714] __split_vma+0x170/0x950 [ 44.189088] split_vma+0xc6/0x110 [ 44.189431] mprotect_fixup+0x8d2/0xb30 [ 44.189825] do_mprotect_pkey+0x87e/0xd40 [ 44.190239] __x64_sys_mprotect+0x78/0xc0 [ 44.190663] do_syscall_64+0x3f/0x90 [ 44.191042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.191540] [ 44.191713] Freed by task 19: [ 44.192009] kasan_save_stack+0x22/0x50 [ 44.192409] kasan_set_track+0x25/0x30 [ 44.192798] kasan_save_free_info+0x2b/0x50 [ 44.193217] __kasan_slab_free+0x10a/0x190 [ 44.193641] kmem_cache_free+0x10d/0x4d0 [ 44.194046] rcu_core+0x8c8/0x2860 [ 44.194409] __do_softirq+0x1b7/0x7d4 [ 44.194784] [ 44.194956] Last potentially related work creation: [ 44.195414] kasan_save_stack+0x22/0x50 [ 44.195817] __kasan_record_aux_stack+0x8e/0xa0 [ 44.196272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.196774] remove_vma+0x139/0x170 [ 44.197134] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.197568] do_vmi_munmap+0x1f1/0x2b0 [ 44.197963] __vm_munmap+0x138/0x3a0 [ 44.198332] __x64_sys_munmap+0x59/0x80 [ 44.198746] do_syscall_64+0x3f/0x90 [ 44.199119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.199633] [ 44.199797] The buggy address belongs to the object at ffff888016510828 [ 44.199797] which belongs to the cache vm_area_struct of size 168 [ 44.200957] The buggy address is located 88 bytes inside of [ 44.200957] freed 168-byte region [ffff888016510828, ffff8880165108d0) [ 44.202053] [ 44.202225] The buggy address belongs to the physical page: [ 44.202772] page:000000005bbfc3cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16510 [ 44.203627] memcg:ffff888016daa101 [ 44.203968] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.204475] page_type: 0xffffffff() [ 44.204839] raw: 0100000000000200 ffff88800879fc80 ffffea00005b6900 dead000000000008 [ 44.205559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016daa101 [ 44.206275] page dumped because: kasan: bad access detected [ 44.206811] [ 44.206977] Memory state around the buggy address: [ 44.207437] ffff888016510780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 44.208118] ffff888016510800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 44.208791] >ffff888016510880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 44.209461] ^ [ 44.209795] ffff888016510900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.210478] ffff888016510980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 44.211153] ================================================================== [ 44.211915] Disabling lock debugging due to kernel taint [ 45.848626] BUG: Bad rss-counter state mm:00000000c4ce6c6c type:MM_FILEPAGES val:33 [ 45.850048] BUG: Bad rss-counter state mm:00000000c4ce6c6c type:MM_ANONPAGES val:22 [ 46.398863] BUG: Bad rss-counter state mm:00000000003e5c0f type:MM_FILEPAGES val:33 [ 46.399879] BUG: Bad rss-counter state mm:00000000003e5c0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7913' (ECDSA) to the list of known hosts. 2023/06/19 22:01:41 fuzzer started 2023/06/19 22:01:42 dialing manager at localhost:44161 2023/06/19 22:01:42 checking machine... 2023/06/19 22:01:42 checking revisions... [ 47.211048] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:01:42 testing simple program... [ 47.262966] cgroup: Unknown subsys name 'net' [ 47.316912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:01:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110028f6f30 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff8880147b7968 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000002 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fd28 RFL=00000256 [---ZAP-] 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 00007f2d2d2fd900 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=00007f2d2c81c000 CR3=000000000c714000 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=906c053c4cadc0cd00000000000ae988 XMM05=21be7e04a1eb9f800000000000133e68 XMM06=c2360d53a8a4fdb70000000000132c08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860aefc6 RBX=0000000000000001 RCX=ffffffff8121b36a RDX=0000000000000000 RSI=ffffffff860aefc6 RDI=ffffffff85da1bd0 RBP=ffff888008e579a8 RSP=ffff888008e578c0 R8 =ffffffff860aefc6 R9 =ffff888008e57990 R10=0000000000038001 R11=000000000000a1ff R12=ffff888008e579b0 R13=ffffffff85da1bd0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbb RFL=00000282 [--S----] 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=00007ffeafce5000 CR3=000000000d93c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000