syzkaller login: [ 38.831089] BUG: Bad rss-counter state mm:00000000b2b39c1d type:MM_FILEPAGES val:33 [ 38.831787] BUG: Bad rss-counter state mm:00000000b2b39c1d type:MM_ANONPAGES val:22 [ 38.963259] ================================================================== [ 38.963939] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.964600] Read of size 8 at addr ffff88800e033140 by task sshd/218 [ 38.965135] [ 38.965291] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.965880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.966570] Call Trace: [ 38.966792] <TASK> [ 38.966995] dump_stack_lvl+0x91/0xf0 [ 38.967342] print_report+0xcc/0x620 [ 38.967728] ? __virt_addr_valid+0x102/0x340 [ 38.968248] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.968684] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.969119] kasan_report+0xbe/0xf0 [ 38.969452] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.969886] vma_interval_tree_remove+0xc75/0xec0 [ 38.970312] vma_prepare+0xc54/0x11a0 [ 38.970652] __split_vma+0x5af/0x950 [ 38.971016] ? __pfx___split_vma+0x10/0x10 [ 38.971388] ? find_held_lock+0x2c/0x110 [ 38.971777] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.972217] ? lock_is_held_type+0x9f/0x120 [ 38.972576] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.972982] ? mtree_range_walk+0x632/0x900 [ 38.973364] ? mas_walk+0x5c7/0x7c0 [ 38.973694] do_vmi_munmap+0x1f1/0x2b0 [ 38.974049] mmap_region+0x1f9/0x2660 [ 38.974405] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.974776] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.975272] ? __pfx_lock_acquire+0x10/0x10 [ 38.975691] ? __pfx_mmap_region+0x10/0x10 [ 38.976076] ? security_mmap_addr+0x7d/0xa0 [ 38.976452] ? get_unmapped_area+0x1f5/0x3f0 [ 38.976875] do_mmap+0x854/0xf00 [ 38.977176] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.977518] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.977900] ksys_mmap_pgoff+0x3af/0x500 [ 38.978264] do_syscall_64+0x3f/0x90 [ 38.978614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.979069] RIP: 0033:0x7f207c72bd82 [ 38.979376] 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 [ 38.980882] RSP: 002b:00007ffc59206b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.981515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f207c72bd82 [ 38.982176] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f207bb65000 [ 38.982793] RBP: 00007f207bb65000 R08: 0000000000000009 R09: 0000000000001000 [ 38.983462] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3e6c33f70 [ 38.984109] R13: 00007ffc59206bb0 R14: 00007ffc59206be0 R15: 00007ffc59206f40 [ 38.984726] </TASK> [ 38.984924] [ 38.985072] Allocated by task 211: [ 38.985368] kasan_save_stack+0x22/0x50 [ 38.985727] kasan_set_track+0x25/0x30 [ 38.986083] __kasan_slab_alloc+0x59/0x70 [ 38.986449] kmem_cache_alloc+0x16b/0x370 [ 38.986807] vm_area_dup+0x20/0x160 [ 38.987132] __split_vma+0x170/0x950 [ 38.987475] split_vma+0xc6/0x110 [ 38.987782] mprotect_fixup+0x8d2/0xb30 [ 38.988136] do_mprotect_pkey+0x87e/0xd40 [ 38.988486] __x64_sys_mprotect+0x78/0xc0 [ 38.988844] do_syscall_64+0x3f/0x90 [ 38.989174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.989643] [ 38.989800] Freed by task 19: [ 38.990074] kasan_save_stack+0x22/0x50 [ 38.990419] kasan_set_track+0x25/0x30 [ 38.990762] kasan_save_free_info+0x2b/0x50 [ 38.991144] __kasan_slab_free+0x10a/0x190 [ 38.991555] kmem_cache_free+0x10d/0x4d0 [ 38.991916] rcu_core+0x8c8/0x2860 [ 38.992239] __do_softirq+0x1b7/0x7d4 [ 38.992571] [ 38.992720] Last potentially related work creation: [ 38.993136] kasan_save_stack+0x22/0x50 [ 38.993496] __kasan_record_aux_stack+0x8e/0xa0 [ 38.993899] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.994354] remove_vma+0x139/0x170 [ 38.994676] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.995067] do_vmi_munmap+0x1f1/0x2b0 [ 38.995440] __vm_munmap+0x138/0x3a0 [ 38.995772] __x64_sys_munmap+0x59/0x80 [ 38.996130] do_syscall_64+0x3f/0x90 [ 38.996461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.996909] [ 38.997063] The buggy address belongs to the object at ffff88800e0330e8 [ 38.997063] which belongs to the cache vm_area_struct of size 168 [ 38.998147] The buggy address is located 88 bytes inside of [ 38.998147] freed 168-byte region [ffff88800e0330e8, ffff88800e033190) [ 38.999175] [ 38.999330] The buggy address belongs to the physical page: [ 38.999804] page:00000000e3a9e735 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe033 [ 39.000570] memcg:ffff88800de2ef01 [ 39.000867] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.001318] page_type: 0xffffffff() [ 39.001642] raw: 0100000000000200 ffff8880087a0c80 ffffea0000379140 dead000000000008 [ 39.002304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de2ef01 [ 39.002932] page dumped because: kasan: bad access detected [ 39.003436] [ 39.003592] Memory state around the buggy address: [ 39.003996] ffff88800e033000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.004596] ffff88800e033080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.005183] >ffff88800e033100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.005778] ^ [ 39.006226] ffff88800e033180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.006830] ffff88800e033200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.007450] ================================================================== [ 39.008303] Disabling lock debugging due to kernel taint [ 40.852235] BUG: Bad rss-counter state mm:000000004041f81a type:MM_FILEPAGES val:33 [ 40.852927] BUG: Bad rss-counter state mm:000000004041f81a type:MM_ANONPAGES val:22 [ 41.266958] BUG: Bad rss-counter state mm:000000003ed96ed2 type:MM_FILEPAGES val:33 [ 41.267670] BUG: Bad rss-counter state mm:000000003ed96ed2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24538' (ECDSA) to the list of known hosts. 2023/06/21 09:36:44 fuzzer started 2023/06/21 09:36:44 dialing manager at localhost:36067 2023/06/21 09:36:44 checking machine... 2023/06/21 09:36:44 checking revisions... [ 41.842488] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:36:44 testing simple program... [ 41.887576] cgroup: Unknown subsys name 'net' [ 41.922495] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:36:44 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=000055972e9be000 CR3=000000000e7fc000 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=36333a3930203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732034343a3633 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363034 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=ffff88801420e990 RBX=0000000000000014 RCX=ffffffff83874199 RDX=ffff888017e7d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801420e8c0 RSP=ffff88800c5f7988 R8 =0000000000000005 R9 =000000000000000f R10=0000000000000014 R11=00000000000b6a61 R12=ffff888008f65698 R13=ffff88801420e8c0 R14=0000000000000014 R15=0000000000000001 RIP=ffffffff838741a5 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 00007f6eeabed900 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=00007f6eeb1a4618 CR3=000000000f34e000 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