syzkaller login: [ 28.870735] BUG: Bad rss-counter state mm:00000000cf2496aa type:MM_FILEPAGES val:33 [ 28.871917] BUG: Bad rss-counter state mm:00000000cf2496aa type:MM_ANONPAGES val:22 [ 28.914375] ================================================================== [ 28.915312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.916254] Read of size 8 at addr ffff88800c5a8058 by task sshd/220 [ 28.917157] [ 28.917375] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.918260] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.919256] Call Trace: [ 28.919581] [ 28.919876] dump_stack_lvl+0x91/0xf0 [ 28.920369] print_report+0xcc/0x620 [ 28.920867] ? __virt_addr_valid+0x102/0x340 [ 28.921419] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.922051] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.922687] kasan_report+0xbe/0xf0 [ 28.923164] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.923796] vma_interval_tree_remove+0xc75/0xec0 [ 28.924398] vma_prepare+0xc54/0x11a0 [ 28.924878] __split_vma+0x5af/0x950 [ 28.925357] ? __pfx___split_vma+0x10/0x10 [ 28.925892] ? find_held_lock+0x2c/0x110 [ 28.926430] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.927009] ? lock_is_held_type+0x9f/0x120 [ 28.927557] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.928161] ? mtree_range_walk+0x632/0x900 [ 28.928718] ? mas_walk+0x5c7/0x7c0 [ 28.929209] do_vmi_munmap+0x1f1/0x2b0 [ 28.929705] mmap_region+0x1f9/0x2660 [ 28.930193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.930715] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.931437] ? __pfx_lock_acquire+0x10/0x10 [ 28.931972] ? __pfx_mmap_region+0x10/0x10 [ 28.932504] ? security_mmap_addr+0x7d/0xa0 [ 28.933044] ? get_unmapped_area+0x1f5/0x3f0 [ 28.933597] do_mmap+0x854/0xf00 [ 28.934038] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.934557] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.935127] ksys_mmap_pgoff+0x3af/0x500 [ 28.935645] do_syscall_64+0x3f/0x90 [ 28.936143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.936795] RIP: 0033:0x7f412a575d82 [ 28.937256] 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 [ 28.939405] RSP: 002b:00007fff9c245028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.940306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f412a575d82 [ 28.941157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41299af000 [ 28.942016] RBP: 00007f41299af000 R08: 0000000000000009 R09: 0000000000001000 [ 28.942871] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558db29bfec0 [ 28.943728] R13: 00007fff9c245040 R14: 00007fff9c245070 R15: 00007fff9c2453d0 [ 28.944590] [ 28.944887] [ 28.945107] Allocated by task 212: [ 28.945535] kasan_save_stack+0x22/0x50 [ 28.946044] kasan_set_track+0x25/0x30 [ 28.946562] __kasan_slab_alloc+0x59/0x70 [ 28.947088] kmem_cache_alloc+0x16b/0x370 [ 28.947607] vm_area_dup+0x20/0x160 [ 28.948071] __split_vma+0x170/0x950 [ 28.948535] split_vma+0xc6/0x110 [ 28.948982] mprotect_fixup+0x8d2/0xb30 [ 28.949489] do_mprotect_pkey+0x87e/0xd40 [ 28.950016] __x64_sys_mprotect+0x78/0xc0 [ 28.950557] do_syscall_64+0x3f/0x90 [ 28.951035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.951688] [ 28.951902] Freed by task 212: [ 28.952297] kasan_save_stack+0x22/0x50 [ 28.952813] kasan_set_track+0x25/0x30 [ 28.953305] kasan_save_free_info+0x2b/0x50 [ 28.953842] __kasan_slab_free+0x10a/0x190 [ 28.954389] kmem_cache_free+0x10d/0x4d0 [ 28.954909] rcu_core+0x8c8/0x2860 [ 28.955392] __do_softirq+0x1b7/0x7d4 [ 28.955871] [ 28.956089] Last potentially related work creation: [ 28.956680] kasan_save_stack+0x22/0x50 [ 28.957192] __kasan_record_aux_stack+0x8e/0xa0 [ 28.957771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.958419] remove_vma+0x139/0x170 [ 28.958873] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.959432] do_vmi_munmap+0x1f1/0x2b0 [ 28.959923] __vm_munmap+0x138/0x3a0 [ 28.960397] __x64_sys_munmap+0x59/0x80 [ 28.960906] do_syscall_64+0x3f/0x90 [ 28.961381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.962021] [ 28.962241] The buggy address belongs to the object at ffff88800c5a8000 [ 28.962241] which belongs to the cache vm_area_struct of size 168 [ 28.963746] The buggy address is located 88 bytes inside of [ 28.963746] freed 168-byte region [ffff88800c5a8000, ffff88800c5a80a8) [ 28.965172] [ 28.965386] The buggy address belongs to the physical page: [ 28.966060] page:0000000007ffea63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5a8 [ 28.967166] memcg:ffff88800b8a9101 [ 28.967592] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.968242] page_type: 0xffffffff() [ 28.968691] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a81c0 dead000000000002 [ 28.969611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b8a9101 [ 28.970529] page dumped because: kasan: bad access detected [ 28.971192] [ 28.971409] Memory state around the buggy address: [ 28.971991] ffff88800c5a7f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.972844] ffff88800c5a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.973705] >ffff88800c5a8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.974582] ^ [ 28.975315] ffff88800c5a8080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 28.976174] ffff88800c5a8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.977035] ================================================================== [ 28.977961] Disabling lock debugging due to kernel taint [ 31.145017] BUG: Bad rss-counter state mm:0000000095636a20 type:MM_FILEPAGES val:33 [ 31.146077] BUG: Bad rss-counter state mm:0000000095636a20 type:MM_ANONPAGES val:22 [ 31.678783] BUG: Bad rss-counter state mm:00000000bcf5e126 type:MM_FILEPAGES val:33 [ 31.680005] BUG: Bad rss-counter state mm:00000000bcf5e126 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43471' (ECDSA) to the list of known hosts. 2023/06/20 12:39:30 fuzzer started 2023/06/20 12:39:30 dialing manager at localhost:36067 2023/06/20 12:39:30 checking machine... 2023/06/20 12:39:30 checking revisions... [ 32.300356] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:39:30 testing simple program... [ 32.352801] cgroup: Unknown subsys name 'net' [ 32.393281] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:39:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007ff71ab99210 CR3=000000000975a000 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=2039323a39333a3231203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a39333a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d258b RBX=0000000000000002 RCX=ffffffff860d2586 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff860d258a R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000000fc0c R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff81130ab5 RFL=00000293 [--S-A-C] 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 00007f86b2afd900 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=00007f86b30b4618 CR3=000000000c6f0000 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