syzkaller login: [ 28.701932] BUG: Bad rss-counter state mm:000000000573eac3 type:MM_FILEPAGES val:33 [ 28.702877] BUG: Bad rss-counter state mm:000000000573eac3 type:MM_ANONPAGES val:22 [ 28.869553] ================================================================== [ 28.870437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.871388] Read of size 8 at addr ffff88800c6c1880 by task sshd/220 [ 28.872147] [ 28.872451] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.873282] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.874199] Call Trace: [ 28.874523] [ 28.874792] dump_stack_lvl+0x91/0xf0 [ 28.875253] print_report+0xcc/0x620 [ 28.875715] ? __virt_addr_valid+0x102/0x340 [ 28.876234] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.876819] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.877401] kasan_report+0xbe/0xf0 [ 28.877852] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878442] vma_interval_tree_remove+0xc75/0xec0 [ 28.879011] vma_prepare+0xc54/0x11a0 [ 28.879479] __split_vma+0x5af/0x950 [ 28.879945] ? __pfx___split_vma+0x10/0x10 [ 28.880461] ? find_held_lock+0x2c/0x110 [ 28.880964] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.881523] ? lock_is_held_type+0x9f/0x120 [ 28.882059] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.882659] ? mtree_range_walk+0x632/0x900 [ 28.883201] ? mas_walk+0x5c7/0x7c0 [ 28.883684] do_vmi_munmap+0x1f1/0x2b0 [ 28.884167] mmap_region+0x1f9/0x2660 [ 28.884636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.885149] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.885839] ? __pfx_lock_acquire+0x10/0x10 [ 28.886361] ? __pfx_mmap_region+0x10/0x10 [ 28.886875] ? security_mmap_addr+0x7d/0xa0 [ 28.887412] ? get_unmapped_area+0x1f5/0x3f0 [ 28.888003] do_mmap+0x854/0xf00 [ 28.888435] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.888924] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.889472] ksys_mmap_pgoff+0x3af/0x500 [ 28.889964] do_syscall_64+0x3f/0x90 [ 28.890429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.891064] RIP: 0033:0x7f3aeb5b6d82 [ 28.891527] 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 [ 28.893598] RSP: 002b:00007fffbd2f5718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.894493] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3aeb5b6d82 [ 28.895329] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3aea9f0000 [ 28.896167] RBP: 00007f3aea9f0000 R08: 0000000000000009 R09: 0000000000001000 [ 28.896999] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b364949b20 [ 28.897833] R13: 00007fffbd2f5730 R14: 00007fffbd2f5760 R15: 00007fffbd2f5ac0 [ 28.898672] [ 28.898968] [ 28.899181] Allocated by task 213: [ 28.899614] kasan_save_stack+0x22/0x50 [ 28.900106] kasan_set_track+0x25/0x30 [ 28.900587] __kasan_slab_alloc+0x59/0x70 [ 28.901101] kmem_cache_alloc+0x16b/0x370 [ 28.901603] vm_area_dup+0x20/0x160 [ 28.902046] __split_vma+0x170/0x950 [ 28.902505] split_vma+0xc6/0x110 [ 28.902930] mprotect_fixup+0x8d2/0xb30 [ 28.903432] do_mprotect_pkey+0x87e/0xd40 [ 28.903949] __x64_sys_mprotect+0x78/0xc0 [ 28.904465] do_syscall_64+0x3f/0x90 [ 28.904925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.905555] [ 28.905765] Freed by task 19: [ 28.906132] kasan_save_stack+0x22/0x50 [ 28.906626] kasan_set_track+0x25/0x30 [ 28.907107] kasan_save_free_info+0x2b/0x50 [ 28.907631] __kasan_slab_free+0x10a/0x190 [ 28.908167] kmem_cache_free+0x10d/0x4d0 [ 28.908667] rcu_core+0x8c8/0x2860 [ 28.909101] __do_softirq+0x1b7/0x7d4 [ 28.909574] [ 28.909782] Last potentially related work creation: [ 28.910356] kasan_save_stack+0x22/0x50 [ 28.910851] __kasan_record_aux_stack+0x8e/0xa0 [ 28.911433] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.912058] remove_vma+0x139/0x170 [ 28.912508] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.913044] do_vmi_munmap+0x1f1/0x2b0 [ 28.913531] __vm_munmap+0x138/0x3a0 [ 28.913996] __x64_sys_munmap+0x59/0x80 [ 28.914487] do_syscall_64+0x3f/0x90 [ 28.914962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.915592] [ 28.915807] Second to last potentially related work creation: [ 28.916479] kasan_save_stack+0x22/0x50 [ 28.916966] __kasan_record_aux_stack+0x8e/0xa0 [ 28.917530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.918158] remove_vma+0x139/0x170 [ 28.918597] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.919157] do_vmi_munmap+0x1f1/0x2b0 [ 28.919644] mmap_region+0x1f9/0x2660 [ 28.920114] do_mmap+0x854/0xf00 [ 28.920537] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.921009] ksys_mmap_pgoff+0x3af/0x500 [ 28.921494] do_syscall_64+0x3f/0x90 [ 28.921955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922581] [ 28.922789] The buggy address belongs to the object at ffff88800c6c1828 [ 28.922789] which belongs to the cache vm_area_struct of size 168 [ 28.924245] The buggy address is located 88 bytes inside of [ 28.924245] freed 168-byte region [ffff88800c6c1828, ffff88800c6c18d0) [ 28.925629] [ 28.925842] The buggy address belongs to the physical page: [ 28.926479] page:00000000fc586ce9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6c1 [ 28.927559] memcg:ffff88800ea18701 [ 28.927975] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.928602] page_type: 0xffffffff() [ 28.929048] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b1e00 dead000000000006 [ 28.929942] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea18701 [ 28.930820] page dumped because: kasan: bad access detected [ 28.931478] [ 28.931683] Memory state around the buggy address: [ 28.932253] ffff88800c6c1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.933085] ffff88800c6c1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 28.933929] >ffff88800c6c1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 28.934753] ^ [ 28.935158] ffff88800c6c1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.935994] ffff88800c6c1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 28.936828] ================================================================== [ 28.937769] Disabling lock debugging due to kernel taint [ 30.863610] BUG: Bad rss-counter state mm:000000007d9c6b23 type:MM_FILEPAGES val:31 [ 30.864629] BUG: Bad rss-counter state mm:000000007d9c6b23 type:MM_ANONPAGES val:22 [ 31.407796] BUG: Bad rss-counter state mm:0000000037707e37 type:MM_FILEPAGES val:33 [ 31.408954] BUG: Bad rss-counter state mm:0000000037707e37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18533' (ECDSA) to the list of known hosts. 2023/06/20 14:03:54 fuzzer started 2023/06/20 14:03:55 dialing manager at localhost:36067 2023/06/20 14:03:55 checking machine... 2023/06/20 14:03:55 checking revisions... [ 32.042158] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:03:55 testing simple program... [ 32.096708] cgroup: Unknown subsys name 'net' [ 32.156101] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:03:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffff88800c98fad0 RDX=1ffff11001931f46 RSI=ffffffff813ad720 RDI=ffff88800c98fa30 RBP=ffff88800c98fac8 RSP=ffff88800c98fa08 R8 =0000000000000001 R9 =ffff88800c98fa70 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800c98faf8 R13=0000000000000000 R14=ffff888017cf51c0 R15=ffff88800c98fa30 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 00007fc00c7d3900 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=00007fc00cd8b0b0 CR3=0000000009a1c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=1ffff1100d9e13a8 RCX=0000000000000000 RDX=1ffff110028497a5 RSI=ffffffff813ed998 RDI=ffff88801424bd28 RBP=ffff88801424b680 RSP=ffff88806cf09d38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88801424bd40 R14=ffff888014347488 R15=ffffffffffffffff RIP=ffffffff813ed9c8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0f7bbe6900 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=00007f0f7b0466a0 CR3=000000000c670000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=072c2de53a0d77f300000000000ae988 XMM05=fe7edb5d58d539780000000000135468 XMM06=4fda316b135da52b0000000000134258 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000