syzkaller login: [ 28.743314] BUG: Bad rss-counter state mm:00000000567610c9 type:MM_FILEPAGES val:33 [ 28.744738] BUG: Bad rss-counter state mm:00000000567610c9 type:MM_ANONPAGES val:22 [ 28.869930] ================================================================== [ 28.870828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.871762] Read of size 8 at addr ffff888019f62a50 by task sshd/221 [ 28.872520] [ 28.872819] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.873706] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.874682] Call Trace: [ 28.875033] [ 28.875320] dump_stack_lvl+0x91/0xf0 [ 28.875816] print_report+0xcc/0x620 [ 28.876301] ? __virt_addr_valid+0x102/0x340 [ 28.876853] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.877499] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878114] kasan_report+0xbe/0xf0 [ 28.878619] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.879279] vma_interval_tree_remove+0xc75/0xec0 [ 28.879917] vma_prepare+0xc54/0x11a0 [ 28.880428] __split_vma+0x5af/0x950 [ 28.880932] ? __pfx___split_vma+0x10/0x10 [ 28.881499] ? find_held_lock+0x2c/0x110 [ 28.882082] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.882688] ? lock_is_held_type+0x9f/0x120 [ 28.883257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.883894] ? mtree_range_walk+0x632/0x900 [ 28.884476] ? mas_walk+0x5c7/0x7c0 [ 28.884982] do_vmi_munmap+0x1f1/0x2b0 [ 28.885514] mmap_region+0x1f9/0x2660 [ 28.886024] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.886562] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.887298] ? __pfx_lock_acquire+0x10/0x10 [ 28.887856] ? __pfx_mmap_region+0x10/0x10 [ 28.888410] ? security_mmap_addr+0x7d/0xa0 [ 28.888973] ? get_unmapped_area+0x1f5/0x3f0 [ 28.889561] do_mmap+0x854/0xf00 [ 28.890013] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.890532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.891122] ksys_mmap_pgoff+0x3af/0x500 [ 28.891653] do_syscall_64+0x3f/0x90 [ 28.892149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.892820] RIP: 0033:0x7fb53a424d82 [ 28.893299] 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 [ 28.895544] RSP: 002b:00007ffde3777548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.896488] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb53a424d82 [ 28.897373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb53985e000 [ 28.898318] RBP: 00007fb53985e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.899206] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569b3671b20 [ 28.900102] R13: 00007ffde3777560 R14: 00007ffde3777590 R15: 00007ffde37778f0 [ 28.900997] [ 28.901304] [ 28.901540] Allocated by task 214: [ 28.901982] kasan_save_stack+0x22/0x50 [ 28.902514] kasan_set_track+0x25/0x30 [ 28.903026] __kasan_slab_alloc+0x59/0x70 [ 28.903576] kmem_cache_alloc+0x16b/0x370 [ 28.904115] vm_area_dup+0x20/0x160 [ 28.904583] __split_vma+0x170/0x950 [ 28.905073] split_vma+0xc6/0x110 [ 28.905554] mprotect_fixup+0x8d2/0xb30 [ 28.906085] do_mprotect_pkey+0x87e/0xd40 [ 28.906630] __x64_sys_mprotect+0x78/0xc0 [ 28.907173] do_syscall_64+0x3f/0x90 [ 28.907670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.908349] [ 28.908574] Freed by task 204: [ 28.908986] kasan_save_stack+0x22/0x50 [ 28.909514] kasan_set_track+0x25/0x30 [ 28.910029] kasan_save_free_info+0x2b/0x50 [ 28.910586] __kasan_slab_free+0x10a/0x190 [ 28.911151] kmem_cache_free+0x10d/0x4d0 [ 28.911682] rcu_core+0x8c8/0x2860 [ 28.912149] __do_softirq+0x1b7/0x7d4 [ 28.912652] [ 28.912875] Last potentially related work creation: [ 28.913496] kasan_save_stack+0x22/0x50 [ 28.914022] __kasan_record_aux_stack+0x8e/0xa0 [ 28.914620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.915295] remove_vma+0x139/0x170 [ 28.915767] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.916363] do_vmi_munmap+0x1f1/0x2b0 [ 28.916869] __vm_munmap+0x138/0x3a0 [ 28.917357] __x64_sys_munmap+0x59/0x80 [ 28.917889] do_syscall_64+0x3f/0x90 [ 28.918391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.919068] [ 28.919293] The buggy address belongs to the object at ffff888019f629f8 [ 28.919293] which belongs to the cache vm_area_struct of size 168 [ 28.920833] The buggy address is located 88 bytes inside of [ 28.920833] freed 168-byte region [ffff888019f629f8, ffff888019f62aa0) [ 28.922315] [ 28.922539] The buggy address belongs to the physical page: [ 28.923225] page:00000000530e9516 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f62 [ 28.924371] memcg:ffff8880158b1501 [ 28.924815] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.925499] page_type: 0xffffffff() [ 28.925974] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.926935] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158b1501 [ 28.927894] page dumped because: kasan: bad access detected [ 28.928592] [ 28.928817] Memory state around the buggy address: [ 28.929422] ffff888019f62900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.930330] ffff888019f62980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.931231] >ffff888019f62a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.932120] ^ [ 28.932849] ffff888019f62a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.933769] ffff888019f62b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.934670] ================================================================== [ 28.935811] Disabling lock debugging due to kernel taint [ 30.852275] BUG: Bad rss-counter state mm:000000006e4b9c8e type:MM_FILEPAGES val:33 [ 30.853450] BUG: Bad rss-counter state mm:000000006e4b9c8e type:MM_ANONPAGES val:22 [ 31.275243] BUG: Bad rss-counter state mm:000000008998473a type:MM_FILEPAGES val:33 [ 31.276183] BUG: Bad rss-counter state mm:000000008998473a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51105' (ECDSA) to the list of known hosts. 2023/06/21 03:29:44 fuzzer started 2023/06/21 03:29:44 dialing manager at localhost:36067 2023/06/21 03:29:44 checking machine... 2023/06/21 03:29:44 checking revisions... [ 31.981583] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:29:44 testing simple program... [ 32.026914] cgroup: Unknown subsys name 'net' [ 32.077871] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:29:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800da8f4a0 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88800da8f470 RBP=ffff88800fe69b40 RSP=ffff88800da8f3b0 R8 =ffff88800da8f740 R9 =0000000000000000 R10=ffff88800da8f408 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800da8f430 R14=ffff88800fe69b40 R15=ffff88800da8f408 RIP=ffffffff84513445 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 00007f27a64ce900 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=00007f27a59621b0 CR3=000000000d8e2000 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=18ef8f91646314a0e04fc485d5ee9228 XMM02=eff9b2d0a8fce9cb000000000011ac18 XMM03=2c67c8bc2e329bc3000000000011ad40 XMM04=5ea7425e3b0d2b3e00000000000ae988 XMM05=fb4562ece13dbacc0000000000132988 XMM06=e4cb8bb95a7664b60000000000131820 XMM07=fb795ef6d65770560000000000121a48 XMM08=2c67c8bc2e329bc3000000000011ad40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff854ee9e8 RCX=1ffff110028fff9b RDX=ffff8880167b51c0 RSI=ffffffff81483294 RDI=ffffffff854ee9ec RBP=0000000000000000 RSP=ffff8880147ffcc0 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=00000000fffffffe R15=0000000000000001 RIP=ffffffff814832ab RFL=00000293 [--S-A-C] 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 00007f4d315d0900 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=00007ffd8f297000 CR3=000000000f298000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000