syzkaller login: [ 35.665218] BUG: Bad rss-counter state mm:0000000057228400 type:MM_FILEPAGES val:33 [ 35.666505] BUG: Bad rss-counter state mm:0000000057228400 type:MM_ANONPAGES val:22 [ 35.703440] ================================================================== [ 35.704526] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.705505] Read of size 8 at addr ffff88800dea5b38 by task sshd/221 [ 35.706290] [ 35.706518] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.707418] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.708438] Call Trace: [ 35.708769] [ 35.709061] dump_stack_lvl+0x91/0xf0 [ 35.709570] print_report+0xcc/0x620 [ 35.710071] ? __virt_addr_valid+0x102/0x340 [ 35.710641] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.711271] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.711925] kasan_report+0xbe/0xf0 [ 35.712429] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.713071] vma_interval_tree_remove+0xc75/0xec0 [ 35.713695] vma_prepare+0xc54/0x11a0 [ 35.714195] __split_vma+0x5af/0x950 [ 35.714692] ? __pfx___split_vma+0x10/0x10 [ 35.715230] ? find_held_lock+0x2c/0x110 [ 35.715778] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.716388] ? lock_is_held_type+0x9f/0x120 [ 35.716952] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.717582] ? mtree_range_walk+0x632/0x900 [ 35.718153] ? mas_walk+0x5c7/0x7c0 [ 35.718650] do_vmi_munmap+0x1f1/0x2b0 [ 35.719155] mmap_region+0x1f9/0x2660 [ 35.719651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.720189] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.720926] ? __pfx_lock_acquire+0x10/0x10 [ 35.721465] ? __pfx_mmap_region+0x10/0x10 [ 35.722014] ? security_mmap_addr+0x7d/0xa0 [ 35.722558] ? get_unmapped_area+0x1f5/0x3f0 [ 35.723131] do_mmap+0x854/0xf00 [ 35.723579] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.724114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.724675] ksys_mmap_pgoff+0x3af/0x500 [ 35.725204] do_syscall_64+0x3f/0x90 [ 35.725701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.726373] RIP: 0033:0x7efd9ccdbd82 [ 35.726846] 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 [ 35.729070] RSP: 002b:00007ffd8c587228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.729997] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd9ccdbd82 [ 35.730882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd9c115000 [ 35.731936] RBP: 00007efd9c115000 R08: 0000000000000009 R09: 0000000000001000 [ 35.732806] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562851357f70 [ 35.733685] R13: 00007ffd8c587240 R14: 00007ffd8c587270 R15: 00007ffd8c5875d0 [ 35.734570] [ 35.734865] [ 35.735085] Allocated by task 213: [ 35.735510] kasan_save_stack+0x22/0x50 [ 35.736031] kasan_set_track+0x25/0x30 [ 35.736528] __kasan_slab_alloc+0x59/0x70 [ 35.737074] kmem_cache_alloc+0x16b/0x370 [ 35.737617] vm_area_dup+0x20/0x160 [ 35.738084] __split_vma+0x170/0x950 [ 35.738567] split_vma+0xc6/0x110 [ 35.739013] mprotect_fixup+0x8d2/0xb30 [ 35.739536] do_mprotect_pkey+0x87e/0xd40 [ 35.740086] __x64_sys_mprotect+0x78/0xc0 [ 35.740629] do_syscall_64+0x3f/0x90 [ 35.741110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.741783] [ 35.742005] Freed by task 213: [ 35.742407] kasan_save_stack+0x22/0x50 [ 35.742933] kasan_set_track+0x25/0x30 [ 35.743443] kasan_save_free_info+0x2b/0x50 [ 35.744038] __kasan_slab_free+0x10a/0x190 [ 35.744584] kmem_cache_free+0x10d/0x4d0 [ 35.745128] rcu_core+0x8c8/0x2860 [ 35.745590] __do_softirq+0x1b7/0x7d4 [ 35.746092] [ 35.746322] Last potentially related work creation: [ 35.746939] kasan_save_stack+0x22/0x50 [ 35.747468] __kasan_record_aux_stack+0x8e/0xa0 [ 35.748078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.748733] remove_vma+0x139/0x170 [ 35.749181] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.749747] do_vmi_munmap+0x1f1/0x2b0 [ 35.750231] __vm_munmap+0x138/0x3a0 [ 35.750694] __x64_sys_munmap+0x59/0x80 [ 35.751186] do_syscall_64+0x3f/0x90 [ 35.751664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.752320] [ 35.752537] The buggy address belongs to the object at ffff88800dea5ae0 [ 35.752537] which belongs to the cache vm_area_struct of size 168 [ 35.754029] The buggy address is located 88 bytes inside of [ 35.754029] freed 168-byte region [ffff88800dea5ae0, ffff88800dea5b88) [ 35.755441] [ 35.755658] The buggy address belongs to the physical page: [ 35.756341] page:00000000f6141092 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdea5 [ 35.757446] memcg:ffff888016ff8f01 [ 35.757875] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.758517] page_type: 0xffffffff() [ 35.758980] raw: 0100000000000200 ffff88800879fc80 ffffea00003b9540 dead000000000002 [ 35.759928] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ff8f01 [ 35.760846] page dumped because: kasan: bad access detected [ 35.761524] [ 35.761741] Memory state around the buggy address: [ 35.762334] ffff88800dea5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.763231] ffff88800dea5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.764147] >ffff88800dea5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.765039] ^ [ 35.765679] ffff88800dea5b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 35.766588] ffff88800dea5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.767484] ================================================================== [ 35.768726] Disabling lock debugging due to kernel taint [ 37.691539] BUG: Bad rss-counter state mm:00000000546b5590 type:MM_FILEPAGES val:33 [ 37.693129] BUG: Bad rss-counter state mm:00000000546b5590 type:MM_ANONPAGES val:22 [ 38.164608] BUG: Bad rss-counter state mm:000000002ae36bf9 type:MM_FILEPAGES val:33 [ 38.165503] BUG: Bad rss-counter state mm:000000002ae36bf9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52848' (ECDSA) to the list of known hosts. 2023/06/20 07:54:51 fuzzer started 2023/06/20 07:54:51 dialing manager at localhost:44161 2023/06/20 07:54:51 checking machine... 2023/06/20 07:54:51 checking revisions... [ 38.876435] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:54:52 testing simple program... [ 38.924870] cgroup: Unknown subsys name 'net' [ 38.966950] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:54:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fa846ad78b0 RCX=0000000000000000 RDX=ffff888015da8000 RSI=ffffffff83638a82 RDI=0000000000000007 RBP=ffff888016717e60 RSP=ffff888016717b48 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000053 R13=0000000000000000 R14=0000000000000040 R15=0000000000000000 RIP=ffffffff814c081b 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 00007fa846adb700 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=00007ffccf04a000 CR3=000000000d9fe000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732031353a3435 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363639 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=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=00007fb7c022aa80 CR3=0000000008dae000 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=8033b90a5f88f18b6e4e1d010b1df10d XMM02=ec2efd57dc4c00df000000000011f908 XMM03=856e4f729718d34f000000000011f9d8 XMM04=79908ebc8922d50900000000000ae988 XMM05=e4cb8bb95a7664b60000000000133ba0 XMM06=c291bd5c70af25b90000000000133a28 XMM07=e042d86d42eb936e0000000000123bc8 XMM08=856e4f729718d34f000000000011f9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000