syzkaller login: [ 164.051497] BUG: Bad rss-counter state mm:00000000f6b677ef type:MM_FILEPAGES val:33 [ 164.052140] BUG: Bad rss-counter state mm:00000000f6b677ef type:MM_ANONPAGES val:22 [ 164.234313] ================================================================== [ 164.234927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 164.235530] Read of size 8 at addr ffff88801a578a50 by task sshd/223 [ 164.236042] [ 164.236195] CPU: 0 PID: 223 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 164.236886] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 164.237501] Call Trace: [ 164.237707] [ 164.237890] dump_stack_lvl+0x91/0xf0 [ 164.238211] print_report+0xcc/0x620 [ 164.238518] ? __virt_addr_valid+0x102/0x340 [ 164.238879] ? vma_interval_tree_remove+0xc75/0xec0 [ 164.239278] ? vma_interval_tree_remove+0xc75/0xec0 [ 164.239669] kasan_report+0xbe/0xf0 [ 164.239974] ? vma_interval_tree_remove+0xc75/0xec0 [ 164.241430] vma_interval_tree_remove+0xc75/0xec0 [ 164.241808] vma_prepare+0xc54/0x11a0 [ 164.242119] __split_vma+0x5af/0x950 [ 164.242430] ? __pfx___split_vma+0x10/0x10 [ 164.242775] ? find_held_lock+0x2c/0x110 [ 164.243109] do_vmi_align_munmap+0x2ba/0x11f0 [ 164.243480] ? lock_is_held_type+0x9f/0x120 [ 164.243830] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 164.244226] ? mtree_range_walk+0x632/0x900 [ 164.244814] ? mas_walk+0x5c7/0x7c0 [ 164.245126] do_vmi_munmap+0x1f1/0x2b0 [ 164.245444] mmap_region+0x1f9/0x2660 [ 164.245754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 164.246091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 164.246542] ? __pfx_lock_acquire+0x10/0x10 [ 164.246881] ? __pfx_mmap_region+0x10/0x10 [ 164.247219] ? security_mmap_addr+0x7d/0xa0 [ 164.247560] ? get_unmapped_area+0x1f5/0x3f0 [ 164.247914] do_mmap+0x854/0xf00 [ 164.248190] vm_mmap_pgoff+0x1a6/0x3a0 [ 164.248549] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 164.248906] ksys_mmap_pgoff+0x3af/0x500 [ 164.249245] do_syscall_64+0x3f/0x90 [ 164.249556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 164.249968] RIP: 0033:0x7f728bfe4d82 [ 164.250260] 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 [ 164.251593] RSP: 002b:00007ffc24054818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 164.252175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f728bfe4d82 [ 164.252934] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f728b41e000 [ 164.253518] RBP: 00007f728b41e000 R08: 0000000000000009 R09: 0000000000001000 [ 164.254052] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556eeb172ec0 [ 164.254640] R13: 00007ffc24054830 R14: 00007ffc24054860 R15: 00007ffc24054bc0 [ 164.255239] [ 164.255436] [ 164.255578] Allocated by task 214: [ 164.255851] kasan_save_stack+0x22/0x50 [ 164.256265] kasan_set_track+0x25/0x30 [ 164.256644] __kasan_slab_alloc+0x59/0x70 [ 164.256982] kmem_cache_alloc+0x16b/0x370 [ 164.257361] vm_area_dup+0x20/0x160 [ 164.257650] __split_vma+0x170/0x950 [ 164.257942] split_vma+0xc6/0x110 [ 164.258282] mprotect_fixup+0x8d2/0xb30 [ 164.258604] do_mprotect_pkey+0x87e/0xd40 [ 164.258935] __x64_sys_mprotect+0x78/0xc0 [ 164.259323] do_syscall_64+0x3f/0x90 [ 164.259635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 164.260045] [ 164.260238] Freed by task 13: [ 164.260511] kasan_save_stack+0x22/0x50 [ 164.260836] kasan_set_track+0x25/0x30 [ 164.261210] kasan_save_free_info+0x2b/0x50 [ 164.261555] __kasan_slab_free+0x10a/0x190 [ 164.261894] kmem_cache_free+0x10d/0x4d0 [ 164.262275] rcu_core+0x8c8/0x2860 [ 164.262559] __do_softirq+0x1b7/0x7d4 [ 164.262865] [ 164.263005] Last potentially related work creation: [ 164.263424] kasan_save_stack+0x22/0x50 [ 164.263744] __kasan_record_aux_stack+0x8e/0xa0 [ 164.264116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 164.264625] remove_vma+0x139/0x170 [ 164.264923] do_vmi_align_munmap+0xd4a/0x11f0 [ 164.265328] do_vmi_munmap+0x1f1/0x2b0 [ 164.265637] __vm_munmap+0x138/0x3a0 [ 164.265937] __x64_sys_munmap+0x59/0x80 [ 164.266317] do_syscall_64+0x3f/0x90 [ 164.266623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 164.267031] [ 164.267216] The buggy address belongs to the object at ffff88801a5789f8 [ 164.267216] which belongs to the cache vm_area_struct of size 168 [ 164.268145] The buggy address is located 88 bytes inside of [ 164.268145] freed 168-byte region [ffff88801a5789f8, ffff88801a578aa0) [ 164.269099] [ 164.269294] The buggy address belongs to the physical page: [ 164.269709] page:0000000079092682 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a578 [ 164.270459] memcg:ffff88800e389201 [ 164.270729] flags: 0x100000000000200(slab|node=0|zone=1) [ 164.271143] page_type: 0xffffffff() [ 164.271490] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 164.272079] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e389201 [ 164.272743] page dumped because: kasan: bad access detected [ 164.273208] [ 164.273353] Memory state around the buggy address: [ 164.273718] ffff88801a578900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 164.274313] ffff88801a578980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 164.274852] >ffff88801a578a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 164.275448] ^ [ 164.275890] ffff88801a578a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 164.276506] ffff88801a578b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 164.277042] ================================================================== [ 164.300405] Disabling lock debugging due to kernel taint [ 166.325078] BUG: Bad rss-counter state mm:000000001168e22a type:MM_FILEPAGES val:33 [ 166.326837] BUG: Bad rss-counter state mm:000000001168e22a type:MM_ANONPAGES val:22 [ 167.682787] BUG: Bad rss-counter state mm:000000007ce3cf69 type:MM_FILEPAGES val:31 [ 167.683443] BUG: Bad rss-counter state mm:000000007ce3cf69 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19537' (ECDSA) to the list of known hosts. 2023/06/20 10:09:45 fuzzer started 2023/06/20 10:09:45 dialing manager at localhost:44161 2023/06/20 10:09:45 checking machine... 2023/06/20 10:09:45 checking revisions... [ 168.656460] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:09:46 testing simple program... [ 168.718308] cgroup: Unknown subsys name 'net' [ 168.776771] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:36 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff8116fe2a RCX=0000000000000001 RDX=1ffff11001d97edf RSI=ffff88800ecbfdf8 RDI=ffffffff8116fe2a RBP=ffff88800ecbf6f8 RSP=ffff88800ecbf678 R8 =0000000000000001 R9 =ffff88800ecbf6e0 R10=0000000000038001 R11=000000000000712d R12=ffff88800ecbf768 R13=0000000000000000 R14=ffff88800f310000 R15=ffff88800e8b35f0 RIP=ffffffff811fc87f RFL=00000202 [-------] 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 00007f81709d4900 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=00007fb343fa85c0 CR3=000000001a5f8000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88806cf361a0 RBP=ffff88800d9a5700 RSP=ffff88800f6c7870 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000ffffff20 R15=ffff88806cf361a0 RIP=ffffffff812d8e20 RFL=00000086 [--S--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 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=00007f8170e04790 CR3=0000000019fb8000 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=0000000000000018fffffffe7ffbfeff XMM01=0000000000000002000055cd00000030 XMM02=00000000000000008000000000000006 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=9b503820bb4315d10000000000000000 XMM06=73a83d5751f20ba491cb9c143da92160 XMM07=210e6fb9622781d79501c80f39cd57c4 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000