syzkaller login: [ 28.716033] BUG: Bad rss-counter state mm:000000000220c27f type:MM_FILEPAGES val:33 [ 28.717204] BUG: Bad rss-counter state mm:000000000220c27f type:MM_ANONPAGES val:22 [ 28.901524] ================================================================== [ 28.902448] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.903389] Read of size 8 at addr ffff88800e6c1140 by task sshd/224 [ 28.904150] [ 28.904366] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.905412] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.906419] Call Trace: [ 28.906738] <TASK> [ 28.907028] dump_stack_lvl+0x91/0xf0 [ 28.907547] print_report+0xcc/0x620 [ 28.908046] ? __virt_addr_valid+0x102/0x340 [ 28.908603] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.909217] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.909838] kasan_report+0xbe/0xf0 [ 28.910333] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.910956] vma_interval_tree_remove+0xc75/0xec0 [ 28.911564] vma_prepare+0xc54/0x11a0 [ 28.912063] __split_vma+0x5af/0x950 [ 28.912552] ? __pfx___split_vma+0x10/0x10 [ 28.913080] ? find_held_lock+0x2c/0x110 [ 28.913598] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.914168] ? lock_is_held_type+0x9f/0x120 [ 28.914709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.915317] ? mtree_range_walk+0x632/0x900 [ 28.915866] ? mas_walk+0x5c7/0x7c0 [ 28.916350] do_vmi_munmap+0x1f1/0x2b0 [ 28.916847] mmap_region+0x1f9/0x2660 [ 28.917327] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.917845] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.918599] ? __pfx_lock_acquire+0x10/0x10 [ 28.919133] ? __pfx_mmap_region+0x10/0x10 [ 28.919659] ? security_mmap_addr+0x7d/0xa0 [ 28.920188] ? get_unmapped_area+0x1f5/0x3f0 [ 28.920734] do_mmap+0x854/0xf00 [ 28.921171] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.921663] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.922231] ksys_mmap_pgoff+0x3af/0x500 [ 28.922741] do_syscall_64+0x3f/0x90 [ 28.923219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.923860] RIP: 0033:0x7f70b8861d82 [ 28.924318] 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 [ 28.926431] RSP: 002b:00007fff820d95d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.927339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70b8861d82 [ 28.928180] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70b7c9b000 [ 28.929016] RBP: 00007f70b7c9b000 R08: 0000000000000009 R09: 0000000000001000 [ 28.929862] R10: 0000000000000812 R11: 0000000000000206 R12: 000056101b41df60 [ 28.930743] R13: 00007fff820d95f0 R14: 00007fff820d9620 R15: 00007fff820d9980 [ 28.931605] </TASK> [ 28.931897] [ 28.932118] Allocated by task 214: [ 28.932556] kasan_save_stack+0x22/0x50 [ 28.933062] kasan_set_track+0x25/0x30 [ 28.933554] __kasan_slab_alloc+0x59/0x70 [ 28.934076] kmem_cache_alloc+0x16b/0x370 [ 28.934610] vm_area_dup+0x20/0x160 [ 28.935071] __split_vma+0x170/0x950 [ 28.935538] split_vma+0xc6/0x110 [ 28.935979] mprotect_fixup+0x8d2/0xb30 [ 28.936473] do_mprotect_pkey+0x87e/0xd40 [ 28.936988] __x64_sys_mprotect+0x78/0xc0 [ 28.937502] do_syscall_64+0x3f/0x90 [ 28.937971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.938618] [ 28.938832] Freed by task 214: [ 28.939224] kasan_save_stack+0x22/0x50 [ 28.939728] kasan_set_track+0x25/0x30 [ 28.940222] kasan_save_free_info+0x2b/0x50 [ 28.940758] __kasan_slab_free+0x10a/0x190 [ 28.941290] kmem_cache_free+0x10d/0x4d0 [ 28.941797] rcu_core+0x8c8/0x2860 [ 28.942259] __do_softirq+0x1b7/0x7d4 [ 28.942739] [ 28.942956] Last potentially related work creation: [ 28.943545] kasan_save_stack+0x22/0x50 [ 28.944049] __kasan_record_aux_stack+0x8e/0xa0 [ 28.944627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.945272] remove_vma+0x139/0x170 [ 28.945726] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.946296] do_vmi_munmap+0x1f1/0x2b0 [ 28.946781] __vm_munmap+0x138/0x3a0 [ 28.947249] __x64_sys_munmap+0x59/0x80 [ 28.947749] do_syscall_64+0x3f/0x90 [ 28.948226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.948870] [ 28.949085] The buggy address belongs to the object at ffff88800e6c10e8 [ 28.949085] which belongs to the cache vm_area_struct of size 168 [ 28.950558] The buggy address is located 88 bytes inside of [ 28.950558] freed 168-byte region [ffff88800e6c10e8, ffff88800e6c1190) [ 28.951954] [ 28.952175] The buggy address belongs to the physical page: [ 28.952831] page:0000000000603a92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6c1 [ 28.953911] memcg:ffff88800e9ec901 [ 28.954353] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.954993] page_type: 0xffffffff() [ 28.955441] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 28.956355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9ec901 [ 28.957253] page dumped because: kasan: bad access detected [ 28.957907] [ 28.958128] Memory state around the buggy address: [ 28.958720] ffff88800e6c1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.959574] ffff88800e6c1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.960427] >ffff88800e6c1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.961287] ^ [ 28.961918] ffff88800e6c1180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.962803] ffff88800e6c1200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.963689] ================================================================== [ 28.964889] Disabling lock debugging due to kernel taint [ 30.849591] BUG: Bad rss-counter state mm:0000000002132925 type:MM_FILEPAGES val:33 [ 30.850934] BUG: Bad rss-counter state mm:0000000002132925 type:MM_ANONPAGES val:22 [ 31.346577] BUG: Bad rss-counter state mm:00000000a289a716 type:MM_FILEPAGES val:33 [ 31.347638] BUG: Bad rss-counter state mm:00000000a289a716 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16618' (ECDSA) to the list of known hosts. 2023/06/21 07:25:40 fuzzer started 2023/06/21 07:25:40 dialing manager at localhost:36067 2023/06/21 07:25:40 checking machine... 2023/06/21 07:25:40 checking revisions... [ 32.089954] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:25:40 testing simple program... [ 32.153212] cgroup: Unknown subsys name 'net' [ 32.197206] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:25:40 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffffed1001522f8a RCX=ffffffff812e0135 RDX=ffffed1001522f89 RSI=0000000000000004 RDI=ffff88800a917c48 RBP=ffffed1001522f89 RSP=ffff88800a917c00 R8 =0000000000000001 R9 =ffffed1001522f89 R10=ffff88800a917c4b R11=00000000000b6a61 R12=ffffffff856d84a8 R13=ffffffff856d84b0 R14=ffff8880101a9af8 R15=ffff8880101a9ab0 RIP=ffffffff8180f121 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 00007f0d935ab900 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=00007f0d93b630b0 CR3=000000000e6b2000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f0a2599b580 CR3=000000000cefa000 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=0ee0e63d29b96297914ff32c0cba2037 XMM02=2c67c8bc2e329bc3000000000011f9e0 XMM03=fb795ef6d657705600000000001222e8 XMM04=daa886df9d4cf3de00000000000ae988 XMM05=59d5b690e0af863b0000000000132928 XMM06=e8416b4fd7a08b880000000000131790 XMM07=e042d86d42eb936e00000000001225c0 XMM08=372d482da650ff37000000000011fa40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000