syzkaller login: [ 50.828269] BUG: Bad rss-counter state mm:00000000a730f9a7 type:MM_FILEPAGES val:33 [ 50.829568] BUG: Bad rss-counter state mm:00000000a730f9a7 type:MM_ANONPAGES val:22 [ 50.876044] ================================================================== [ 50.876951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.877904] Read of size 8 at addr ffff888016ac6df0 by task sshd/220 [ 50.878667] [ 50.878883] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.879750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.880730] Call Trace: [ 50.881052] <TASK> [ 50.881337] dump_stack_lvl+0x91/0xf0 [ 50.881846] print_report+0xcc/0x620 [ 50.882331] ? __virt_addr_valid+0x102/0x340 [ 50.882886] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.883508] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.884129] kasan_report+0xbe/0xf0 [ 50.884599] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.885219] vma_interval_tree_remove+0xc75/0xec0 [ 50.885834] vma_prepare+0xc54/0x11a0 [ 50.886321] __split_vma+0x5af/0x950 [ 50.886791] ? __pfx___split_vma+0x10/0x10 [ 50.887319] ? find_held_lock+0x2c/0x110 [ 50.887841] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.888409] ? lock_is_held_type+0x9f/0x120 [ 50.888948] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.889544] ? mtree_range_walk+0x632/0x900 [ 50.890122] ? mas_walk+0x5c7/0x7c0 [ 50.890596] do_vmi_munmap+0x1f1/0x2b0 [ 50.891087] mmap_region+0x1f9/0x2660 [ 50.891574] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.892087] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.892798] ? __pfx_lock_acquire+0x10/0x10 [ 50.893335] ? __pfx_mmap_region+0x10/0x10 [ 50.893869] ? security_mmap_addr+0x7d/0xa0 [ 50.894405] ? get_unmapped_area+0x1f5/0x3f0 [ 50.894956] do_mmap+0x854/0xf00 [ 50.895394] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.895886] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.896453] ksys_mmap_pgoff+0x3af/0x500 [ 50.896961] do_syscall_64+0x3f/0x90 [ 50.897440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.898104] RIP: 0033:0x7f48043acd82 [ 50.898565] 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 [ 50.900697] RSP: 002b:00007ffe67f8d118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.901604] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48043acd82 [ 50.902477] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f48037e6000 [ 50.903332] RBP: 00007f48037e6000 R08: 0000000000000009 R09: 0000000000001000 [ 50.904220] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f9eddef70 [ 50.905105] R13: 00007ffe67f8d130 R14: 00007ffe67f8d160 R15: 00007ffe67f8d4c0 [ 50.905969] </TASK> [ 50.906267] [ 50.906476] Allocated by task 213: [ 50.906907] kasan_save_stack+0x22/0x50 [ 50.907420] kasan_set_track+0x25/0x30 [ 50.907921] __kasan_slab_alloc+0x59/0x70 [ 50.908461] kmem_cache_alloc+0x16b/0x370 [ 50.908996] vm_area_dup+0x20/0x160 [ 50.909459] __split_vma+0x170/0x950 [ 50.909960] split_vma+0xc6/0x110 [ 50.910405] mprotect_fixup+0x8d2/0xb30 [ 50.910918] do_mprotect_pkey+0x87e/0xd40 [ 50.911450] __x64_sys_mprotect+0x78/0xc0 [ 50.911981] do_syscall_64+0x3f/0x90 [ 50.912459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.913117] [ 50.913339] Freed by task 213: [ 50.913751] kasan_save_stack+0x22/0x50 [ 50.914269] kasan_set_track+0x25/0x30 [ 50.914770] kasan_save_free_info+0x2b/0x50 [ 50.915311] __kasan_slab_free+0x10a/0x190 [ 50.915852] kmem_cache_free+0x10d/0x4d0 [ 50.916370] rcu_core+0x8c8/0x2860 [ 50.916820] __do_softirq+0x1b7/0x7d4 [ 50.917304] [ 50.917526] Last potentially related work creation: [ 50.918127] kasan_save_stack+0x22/0x50 [ 50.918642] __kasan_record_aux_stack+0x8e/0xa0 [ 50.919233] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.919886] remove_vma+0x139/0x170 [ 50.920350] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.920922] do_vmi_munmap+0x1f1/0x2b0 [ 50.921428] __vm_munmap+0x138/0x3a0 [ 50.921920] __x64_sys_munmap+0x59/0x80 [ 50.922435] do_syscall_64+0x3f/0x90 [ 50.922918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.923574] [ 50.923795] The buggy address belongs to the object at ffff888016ac6d98 [ 50.923795] which belongs to the cache vm_area_struct of size 168 [ 50.925303] The buggy address is located 88 bytes inside of [ 50.925303] freed 168-byte region [ffff888016ac6d98, ffff888016ac6e40) [ 50.926744] [ 50.926962] The buggy address belongs to the physical page: [ 50.927631] page:00000000761ad125 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ac6 [ 50.928734] memcg:ffff888019d6d901 [ 50.929165] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.929837] page_type: 0xffffffff() [ 50.930300] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.931238] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d6d901 [ 50.932148] page dumped because: kasan: bad access detected [ 50.932818] [ 50.933037] Memory state around the buggy address: [ 50.933626] ffff888016ac6c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 50.934500] ffff888016ac6d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 50.935365] >ffff888016ac6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 50.936224] ^ [ 50.937039] ffff888016ac6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.937920] ffff888016ac6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.938781] ================================================================== [ 50.940178] Disabling lock debugging due to kernel taint [ 53.862477] BUG: Bad rss-counter state mm:00000000dbc97305 type:MM_FILEPAGES val:33 [ 53.863488] BUG: Bad rss-counter state mm:00000000dbc97305 type:MM_ANONPAGES val:22 [ 54.317044] BUG: Bad rss-counter state mm:0000000081b8f315 type:MM_FILEPAGES val:33 [ 54.318139] BUG: Bad rss-counter state mm:0000000081b8f315 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48259' (ECDSA) to the list of known hosts. 2023/06/20 01:13:29 fuzzer started 2023/06/20 01:13:29 dialing manager at localhost:44161 2023/06/20 01:13:29 checking machine... 2023/06/20 01:13:29 checking revisions... [ 55.038701] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:13:29 testing simple program... [ 55.085177] cgroup: Unknown subsys name 'net' [ 55.146040] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:13:09 Registers: info registers vcpu 0 RAX=000000003d6174eb RBX=000000006763694c RCX=ffff8880180cfb4c RDX=000000000000000b RSI=0000000000000001 RDI=0000000053fcfba6 RBP=0000000000000000 RSP=ffff8880180cfa90 R8 =000000001b05e250 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff8880180cfaf8 R15=000000000000000b RIP=ffffffff82270eb0 RFL=00000206 [-----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 00007f57da58c900 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=00007ffc40015000 CR3=000000001ce1c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f32edd15380 CR3=000000000d60a000 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=ec959b0c2be73e8bb54f081398c0cfae XMM02=2c67c8bc2e329bc3000000000011cd18 XMM03=fb795ef6d65770560000000000123eb0 XMM04=1f147103e526f70600000000000ae988 XMM05=19e9129bd510f2350000000000133c88 XMM06=4a49e78c4470fa380000000000132af0 XMM07=e042d86d42eb936e0000000000124130 XMM08=543d1eeae27edfea000000000011cd78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000