syzkaller login: [ 38.745475] BUG: Bad rss-counter state mm:000000004eb3c496 type:MM_FILEPAGES val:33 [ 38.746681] BUG: Bad rss-counter state mm:000000004eb3c496 type:MM_ANONPAGES val:22 [ 38.900698] ================================================================== [ 38.901629] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.902577] Read of size 8 at addr ffff88800df3e310 by task sshd/221 [ 38.903378] [ 38.903716] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.904590] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.905584] Call Trace: [ 38.905913] [ 38.906208] dump_stack_lvl+0x91/0xf0 [ 38.906705] print_report+0xcc/0x620 [ 38.907207] ? __virt_addr_valid+0x102/0x340 [ 38.907770] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.908395] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.909022] kasan_report+0xbe/0xf0 [ 38.909514] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.910145] vma_interval_tree_remove+0xc75/0xec0 [ 38.910774] vma_prepare+0xc54/0x11a0 [ 38.911274] __split_vma+0x5af/0x950 [ 38.911758] ? __pfx___split_vma+0x10/0x10 [ 38.912299] ? find_held_lock+0x2c/0x110 [ 38.912823] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.913394] ? lock_is_held_type+0x9f/0x120 [ 38.913945] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.914565] ? mtree_range_walk+0x632/0x900 [ 38.915149] ? mas_walk+0x5c7/0x7c0 [ 38.915628] do_vmi_munmap+0x1f1/0x2b0 [ 38.916117] mmap_region+0x1f9/0x2660 [ 38.916603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.917127] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.917849] ? __pfx_lock_acquire+0x10/0x10 [ 38.918384] ? __pfx_mmap_region+0x10/0x10 [ 38.918927] ? security_mmap_addr+0x7d/0xa0 [ 38.919467] ? get_unmapped_area+0x1f5/0x3f0 [ 38.920022] do_mmap+0x854/0xf00 [ 38.920475] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.920974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.921557] ksys_mmap_pgoff+0x3af/0x500 [ 38.922065] do_syscall_64+0x3f/0x90 [ 38.922547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923205] RIP: 0033:0x7f54a4a72d82 [ 38.923673] 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 [ 38.925815] RSP: 002b:00007ffe6621d5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.926732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54a4a72d82 [ 38.927614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54a3eac000 [ 38.928465] RBP: 00007f54a3eac000 R08: 0000000000000009 R09: 0000000000001000 [ 38.929320] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9a43eaec0 [ 38.930174] R13: 00007ffe6621d610 R14: 00007ffe6621d640 R15: 00007ffe6621d9a0 [ 38.931058] [ 38.931354] [ 38.931572] Allocated by task 214: [ 38.932005] kasan_save_stack+0x22/0x50 [ 38.932518] kasan_set_track+0x25/0x30 [ 38.933024] __kasan_slab_alloc+0x59/0x70 [ 38.933557] kmem_cache_alloc+0x16b/0x370 [ 38.934085] vm_area_dup+0x20/0x160 [ 38.934548] __split_vma+0x170/0x950 [ 38.935037] split_vma+0xc6/0x110 [ 38.935480] mprotect_fixup+0x8d2/0xb30 [ 38.935986] do_mprotect_pkey+0x87e/0xd40 [ 38.936513] __x64_sys_mprotect+0x78/0xc0 [ 38.937039] do_syscall_64+0x3f/0x90 [ 38.937520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938176] [ 38.938394] Freed by task 214: [ 38.938789] kasan_save_stack+0x22/0x50 [ 38.939307] kasan_set_track+0x25/0x30 [ 38.939801] kasan_save_free_info+0x2b/0x50 [ 38.940341] __kasan_slab_free+0x10a/0x190 [ 38.940882] kmem_cache_free+0x10d/0x4d0 [ 38.941396] rcu_core+0x8c8/0x2860 [ 38.941847] __do_softirq+0x1b7/0x7d4 [ 38.942332] [ 38.942546] Last potentially related work creation: [ 38.943166] kasan_save_stack+0x22/0x50 [ 38.943679] __kasan_record_aux_stack+0x8e/0xa0 [ 38.944249] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.944886] remove_vma+0x139/0x170 [ 38.945342] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.945909] do_vmi_munmap+0x1f1/0x2b0 [ 38.946401] __vm_munmap+0x138/0x3a0 [ 38.946890] __x64_sys_munmap+0x59/0x80 [ 38.947396] do_syscall_64+0x3f/0x90 [ 38.947873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.948529] [ 38.948746] Second to last potentially related work creation: [ 38.949431] kasan_save_stack+0x22/0x50 [ 38.949936] __kasan_record_aux_stack+0x8e/0xa0 [ 38.950522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.951181] remove_vma+0x139/0x170 [ 38.951654] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.952229] do_vmi_munmap+0x1f1/0x2b0 [ 38.952729] mmap_region+0x1f9/0x2660 [ 38.953212] do_mmap+0x854/0xf00 [ 38.953657] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.954150] ksys_mmap_pgoff+0x3af/0x500 [ 38.954667] do_syscall_64+0x3f/0x90 [ 38.955160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955818] [ 38.956035] The buggy address belongs to the object at ffff88800df3e2b8 [ 38.956035] which belongs to the cache vm_area_struct of size 168 [ 38.957498] The buggy address is located 88 bytes inside of [ 38.957498] freed 168-byte region [ffff88800df3e2b8, ffff88800df3e360) [ 38.958913] [ 38.959132] The buggy address belongs to the physical page: [ 38.959794] page:00000000b16a19d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf3e [ 38.960889] memcg:ffff88800eac3f01 [ 38.961319] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.962024] page_type: 0xffffffff() [ 38.962486] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.963424] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac3f01 [ 38.964348] page dumped because: kasan: bad access detected [ 38.965016] [ 38.965236] Memory state around the buggy address: [ 38.965831] ffff88800df3e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.966699] ffff88800df3e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.967584] >ffff88800df3e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.968444] ^ [ 38.968927] ffff88800df3e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.969789] ffff88800df3e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.970649] ================================================================== [ 38.971649] Disabling lock debugging due to kernel taint [ 40.734098] BUG: Bad rss-counter state mm:00000000d25a817d type:MM_FILEPAGES val:33 [ 40.735145] BUG: Bad rss-counter state mm:00000000d25a817d type:MM_ANONPAGES val:22 [ 41.220138] BUG: Bad rss-counter state mm:000000007d89b98d type:MM_FILEPAGES val:33 [ 41.221316] BUG: Bad rss-counter state mm:000000007d89b98d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54919' (ECDSA) to the list of known hosts. 2023/06/20 13:24:08 fuzzer started 2023/06/20 13:24:08 dialing manager at localhost:36067 2023/06/20 13:24:08 checking machine... 2023/06/20 13:24:08 checking revisions... [ 41.895456] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:24:09 testing simple program... [ 41.952565] cgroup: Unknown subsys name 'net' [ 42.004845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:24:08 Registers: info registers vcpu 0 RAX=1ffff11001fad2ab RBX=ffff88800fd69528 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800fd69558 RBP=ffff88800c633f18 RSP=ffff888015aa7888 R8 =0000000000000001 R9 =ffffed1002b54f05 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800c63a000 R14=ffffffff8367562f R15=ffff888008cd4100 RIP=ffffffff818464e2 RFL=00000046 [---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 00007f909f8ab700 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=00007ffe350c6c18 CR3=0000000015b36000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732038303a3432 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303233 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc09 RBX=ffffffff85dfe048 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88806cf099c0 R8 =ffffffff86138eb0 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe060 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f5583e16900 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=00007f55843cd618 CR3=000000001992e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000