syzkaller login: [ 30.161250] BUG: Bad rss-counter state mm:000000001866bf44 type:MM_FILEPAGES val:33 [ 30.163482] BUG: Bad rss-counter state mm:000000001866bf44 type:MM_ANONPAGES val:22 [ 30.344919] ================================================================== [ 30.345883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.346874] Read of size 8 at addr ffff8880158445c8 by task sshd/221 [ 30.347711] [ 30.348046] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.348959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.350001] Call Trace: [ 30.350339] [ 30.350643] dump_stack_lvl+0x91/0xf0 [ 30.351173] print_report+0xcc/0x620 [ 30.351690] ? __virt_addr_valid+0x102/0x340 [ 30.352275] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.352931] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.353582] kasan_report+0xbe/0xf0 [ 30.354083] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.354747] vma_interval_tree_remove+0xc75/0xec0 [ 30.355432] vma_prepare+0xc54/0x11a0 [ 30.355956] __split_vma+0x5af/0x950 [ 30.356474] ? __pfx___split_vma+0x10/0x10 [ 30.357054] ? find_held_lock+0x2c/0x110 [ 30.357619] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.358239] ? lock_is_held_type+0x9f/0x120 [ 30.358836] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.359505] ? mtree_range_walk+0x632/0x900 [ 30.360116] ? mas_walk+0x5c7/0x7c0 [ 30.360634] do_vmi_munmap+0x1f1/0x2b0 [ 30.361174] mmap_region+0x1f9/0x2660 [ 30.361703] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.362270] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.363051] ? __pfx_lock_acquire+0x10/0x10 [ 30.363647] ? __pfx_mmap_region+0x10/0x10 [ 30.364232] ? security_mmap_addr+0x7d/0xa0 [ 30.364817] ? get_unmapped_area+0x1f5/0x3f0 [ 30.365422] do_mmap+0x854/0xf00 [ 30.365903] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.366446] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.367065] ksys_mmap_pgoff+0x3af/0x500 [ 30.367642] do_syscall_64+0x3f/0x90 [ 30.368173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.368885] RIP: 0033:0x7f7ce887dd82 [ 30.369390] 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 [ 30.371737] RSP: 002b:00007ffe2a058348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.372734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7ce887dd82 [ 30.373663] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7ce7cb7000 [ 30.374597] RBP: 00007f7ce7cb7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.375538] R10: 0000000000000812 R11: 0000000000000206 R12: 000056270f702ec0 [ 30.376467] R13: 00007ffe2a058360 R14: 00007ffe2a058390 R15: 00007ffe2a0586f0 [ 30.377409] [ 30.377731] [ 30.377966] Allocated by task 214: [ 30.378439] kasan_save_stack+0x22/0x50 [ 30.378991] kasan_set_track+0x25/0x30 [ 30.379557] __kasan_slab_alloc+0x59/0x70 [ 30.380132] kmem_cache_alloc+0x16b/0x370 [ 30.380697] vm_area_dup+0x20/0x160 [ 30.381198] __split_vma+0x170/0x950 [ 30.381714] split_vma+0xc6/0x110 [ 30.382196] mprotect_fixup+0x8d2/0xb30 [ 30.382747] do_mprotect_pkey+0x87e/0xd40 [ 30.383330] __x64_sys_mprotect+0x78/0xc0 [ 30.383903] do_syscall_64+0x3f/0x90 [ 30.384427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.385131] [ 30.385366] Freed by task 214: [ 30.385796] kasan_save_stack+0x22/0x50 [ 30.386352] kasan_set_track+0x25/0x30 [ 30.386894] kasan_save_free_info+0x2b/0x50 [ 30.387486] __kasan_slab_free+0x10a/0x190 [ 30.388076] kmem_cache_free+0x10d/0x4d0 [ 30.388635] rcu_core+0x8c8/0x2860 [ 30.389121] __do_softirq+0x1b7/0x7d4 [ 30.389644] [ 30.389882] Last potentially related work creation: [ 30.390526] kasan_save_stack+0x22/0x50 [ 30.391083] __kasan_record_aux_stack+0x8e/0xa0 [ 30.391736] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.392444] remove_vma+0x139/0x170 [ 30.392943] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.393551] do_vmi_munmap+0x1f1/0x2b0 [ 30.394084] __vm_munmap+0x138/0x3a0 [ 30.394599] __x64_sys_munmap+0x59/0x80 [ 30.395146] do_syscall_64+0x3f/0x90 [ 30.395666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396367] [ 30.396601] The buggy address belongs to the object at ffff888015844570 [ 30.396601] which belongs to the cache vm_area_struct of size 168 [ 30.398203] The buggy address is located 88 bytes inside of [ 30.398203] freed 168-byte region [ffff888015844570, ffff888015844618) [ 30.399757] [ 30.399995] The buggy address belongs to the physical page: [ 30.400722] page:000000004240bfad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15844 [ 30.401933] memcg:ffff88800ca9a101 [ 30.402401] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.403112] page_type: 0xffffffff() [ 30.403630] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.404641] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca9a101 [ 30.405634] page dumped because: kasan: bad access detected [ 30.406367] [ 30.406607] Memory state around the buggy address: [ 30.407251] ffff888015844480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.408190] ffff888015844500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.409132] >ffff888015844580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.410065] ^ [ 30.410797] ffff888015844600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.411743] ffff888015844680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.412684] ================================================================== [ 30.413777] Disabling lock debugging due to kernel taint [ 32.273215] BUG: Bad rss-counter state mm:00000000b05ca239 type:MM_FILEPAGES val:33 [ 32.274157] BUG: Bad rss-counter state mm:00000000b05ca239 type:MM_ANONPAGES val:22 [ 32.724856] BUG: Bad rss-counter state mm:00000000072c98f6 type:MM_FILEPAGES val:33 [ 32.726239] BUG: Bad rss-counter state mm:00000000072c98f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22814' (ECDSA) to the list of known hosts. 2023/06/21 00:26:34 fuzzer started 2023/06/21 00:26:35 dialing manager at localhost:36067 2023/06/21 00:26:35 checking machine... 2023/06/21 00:26:35 checking revisions... [ 33.452414] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:26:35 testing simple program... [ 33.512870] cgroup: Unknown subsys name 'net' [ 33.566038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:34 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fec4000 RCX=0000000000000000 RDX=1ffff11001fd886f RSI=ffffffff81acaf63 RDI=ffff88800fec4378 RBP=ffff88800fec2000 RSP=ffff888016667a38 R8 =0000000000000005 R9 =0000000000000004 R10=0000000000000000 R11=0000000000000000 R12=ffff88800fec6000 R13=ffff88800fec4380 R14=0000000000000001 R15=000000000000171f RIP=ffffffff81acafae RFL=00000246 [---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 00007f04e16dc700 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=000056402d71a664 CR3=00000000099c8000 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=2034333a36323a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a36323a3030203132 XMM08=3d656e696c646d632022656369767265 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=ffff888008c04400 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=00007fffd1d67298 CR3=00000000099c8000 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=36323a3030203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732034333a3632 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323131 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000