syzkaller login: [ 31.218087] BUG: Bad rss-counter state mm:00000000eae3d250 type:MM_FILEPAGES val:33 [ 31.219120] BUG: Bad rss-counter state mm:00000000eae3d250 type:MM_ANONPAGES val:22 [ 31.256187] ================================================================== [ 31.257166] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.258216] Read of size 8 at addr ffff888016c3cdf0 by task sshd/221 [ 31.259011] [ 31.259230] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.260104] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.261129] Call Trace: [ 31.261459] [ 31.261748] dump_stack_lvl+0x91/0xf0 [ 31.262241] print_report+0xcc/0x620 [ 31.262736] ? __virt_addr_valid+0x102/0x340 [ 31.263305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263950] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.264606] kasan_report+0xbe/0xf0 [ 31.265100] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265728] vma_interval_tree_remove+0xc75/0xec0 [ 31.266360] vma_prepare+0xc54/0x11a0 [ 31.266845] __split_vma+0x5af/0x950 [ 31.267325] ? __pfx___split_vma+0x10/0x10 [ 31.267864] ? find_held_lock+0x2c/0x110 [ 31.268414] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.268981] ? lock_is_held_type+0x9f/0x120 [ 31.269527] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.270139] ? mtree_range_walk+0x632/0x900 [ 31.270705] ? mas_walk+0x5c7/0x7c0 [ 31.271190] do_vmi_munmap+0x1f1/0x2b0 [ 31.271694] mmap_region+0x1f9/0x2660 [ 31.272222] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.272740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.273468] ? __pfx_lock_acquire+0x10/0x10 [ 31.274013] ? __pfx_mmap_region+0x10/0x10 [ 31.274568] ? security_mmap_addr+0x7d/0xa0 [ 31.275113] ? get_unmapped_area+0x1f5/0x3f0 [ 31.275675] do_mmap+0x854/0xf00 [ 31.276134] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.276643] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.277209] ksys_mmap_pgoff+0x3af/0x500 [ 31.277738] do_syscall_64+0x3f/0x90 [ 31.278240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278902] RIP: 0033:0x7ff2aadbdd82 [ 31.279365] 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 [ 31.281529] RSP: 002b:00007ffcbd1ebd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.282456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2aadbdd82 [ 31.283341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2aa1f7000 [ 31.284225] RBP: 00007ff2aa1f7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.285090] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c0e2cfec0 [ 31.285939] R13: 00007ffcbd1ebd80 R14: 00007ffcbd1ebdb0 R15: 00007ffcbd1ec110 [ 31.286818] [ 31.287121] [ 31.287339] Allocated by task 214: [ 31.287781] kasan_save_stack+0x22/0x50 [ 31.288299] kasan_set_track+0x25/0x30 [ 31.288795] __kasan_slab_alloc+0x59/0x70 [ 31.289337] kmem_cache_alloc+0x16b/0x370 [ 31.289876] vm_area_dup+0x20/0x160 [ 31.290337] __split_vma+0x170/0x950 [ 31.290810] split_vma+0xc6/0x110 [ 31.291264] mprotect_fixup+0x8d2/0xb30 [ 31.291780] do_mprotect_pkey+0x87e/0xd40 [ 31.292330] __x64_sys_mprotect+0x78/0xc0 [ 31.292865] do_syscall_64+0x3f/0x90 [ 31.293351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.294025] [ 31.294246] Freed by task 214: [ 31.294647] kasan_save_stack+0x22/0x50 [ 31.295169] kasan_set_track+0x25/0x30 [ 31.295668] kasan_save_free_info+0x2b/0x50 [ 31.296202] __kasan_slab_free+0x10a/0x190 [ 31.296743] kmem_cache_free+0x10d/0x4d0 [ 31.297257] rcu_core+0x8c8/0x2860 [ 31.297708] __do_softirq+0x1b7/0x7d4 [ 31.298186] [ 31.298403] Last potentially related work creation: [ 31.298989] kasan_save_stack+0x22/0x50 [ 31.299494] __kasan_record_aux_stack+0x8e/0xa0 [ 31.300072] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.300728] remove_vma+0x139/0x170 [ 31.301183] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.301744] do_vmi_munmap+0x1f1/0x2b0 [ 31.302228] __vm_munmap+0x138/0x3a0 [ 31.302700] __x64_sys_munmap+0x59/0x80 [ 31.303202] do_syscall_64+0x3f/0x90 [ 31.303676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304342] [ 31.304560] The buggy address belongs to the object at ffff888016c3cd98 [ 31.304560] which belongs to the cache vm_area_struct of size 168 [ 31.306047] The buggy address is located 88 bytes inside of [ 31.306047] freed 168-byte region [ffff888016c3cd98, ffff888016c3ce40) [ 31.307534] [ 31.307763] The buggy address belongs to the physical page: [ 31.308475] page:00000000925344cd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c3c [ 31.309640] memcg:ffff888016426701 [ 31.310089] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.310780] page_type: 0xffffffff() [ 31.311257] raw: 0100000000000200 ffff88800879fc80 ffffea0000262340 dead000000000006 [ 31.312230] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016426701 [ 31.313190] page dumped because: kasan: bad access detected [ 31.313885] [ 31.314111] Memory state around the buggy address: [ 31.314718] ffff888016c3cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.315620] ffff888016c3cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.316543] >ffff888016c3cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.317437] ^ [ 31.318297] ffff888016c3ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.319202] ffff888016c3ce80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.320093] ================================================================== [ 31.321292] Disabling lock debugging due to kernel taint [ 33.271247] BUG: Bad rss-counter state mm:000000007b24d112 type:MM_FILEPAGES val:33 [ 33.272224] BUG: Bad rss-counter state mm:000000007b24d112 type:MM_ANONPAGES val:22 [ 33.758001] BUG: Bad rss-counter state mm:00000000f0ef792b type:MM_FILEPAGES val:33 [ 33.759052] BUG: Bad rss-counter state mm:00000000f0ef792b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38864' (ECDSA) to the list of known hosts. 2023/06/19 15:59:25 fuzzer started 2023/06/19 15:59:26 dialing manager at localhost:44161 2023/06/19 15:59:26 checking machine... 2023/06/19 15:59:26 checking revisions... [ 34.485427] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:59:26 testing simple program... [ 34.542009] cgroup: Unknown subsys name 'net' [ 34.611402] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:59:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff836382d7 RCX=0000000000000001 RDX=1ffff110033e8e7c RSI=ffff888019f47af0 RDI=ffffffff836382d7 RBP=ffffffff836382d7 RSP=ffff888019f47330 R8 =0000000000000001 R9 =ffff888019f473c8 R10=0000000000038001 R11=0000000000091b07 R12=ffff888019f47450 R13=0000000000000000 R14=ffff8880164e1b40 R15=00000000000128c0 RIP=ffffffff811fc6f7 RFL=00000296 [--S-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 00007fa25ae1c900 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=00007fa25b3d3618 CR3=000000000eab8000 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=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 info registers vcpu 1 RAX=ffff88800d0799e8 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001a0f33d RSI=ffff88800d235c48 RDI=ffff88800eb8d668 RBP=ffff88800d235c48 RSP=ffff88806cf09d98 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=ffff88800eb8d658 R13=fffffbfff0f70df0 R14=0000000000000000 R15=ffffffff87b86f80 RIP=ffffffff844cc5c5 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 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=00007ffdbd558d68 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=00007f175627951000005575fe702790 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