syzkaller login: [ 28.885789] BUG: Bad rss-counter state mm:000000005e508b00 type:MM_FILEPAGES val:33 [ 28.886992] BUG: Bad rss-counter state mm:000000005e508b00 type:MM_ANONPAGES val:22 [ 28.922761] ================================================================== [ 28.923747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.924716] Read of size 8 at addr ffff88800c500df0 by task sshd/220 [ 28.925496] [ 28.925715] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.926653] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.927653] Call Trace: [ 28.927979] [ 28.928269] dump_stack_lvl+0x91/0xf0 [ 28.928789] print_report+0xcc/0x620 [ 28.929284] ? __virt_addr_valid+0x102/0x340 [ 28.929840] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.930477] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.931105] kasan_report+0xbe/0xf0 [ 28.931585] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.932208] vma_interval_tree_remove+0xc75/0xec0 [ 28.932833] vma_prepare+0xc54/0x11a0 [ 28.933316] __split_vma+0x5af/0x950 [ 28.933799] ? __pfx___split_vma+0x10/0x10 [ 28.934337] ? find_held_lock+0x2c/0x110 [ 28.934863] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.935430] ? lock_is_held_type+0x9f/0x120 [ 28.935968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.936581] ? mtree_range_walk+0x632/0x900 [ 28.937149] ? mas_walk+0x5c7/0x7c0 [ 28.937638] do_vmi_munmap+0x1f1/0x2b0 [ 28.938134] mmap_region+0x1f9/0x2660 [ 28.938620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.939140] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.939866] ? __pfx_lock_acquire+0x10/0x10 [ 28.940409] ? __pfx_mmap_region+0x10/0x10 [ 28.940981] ? security_mmap_addr+0x7d/0xa0 [ 28.941521] ? get_unmapped_area+0x1f5/0x3f0 [ 28.942095] do_mmap+0x854/0xf00 [ 28.942559] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.943067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.943671] ksys_mmap_pgoff+0x3af/0x500 [ 28.944207] do_syscall_64+0x3f/0x90 [ 28.944688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.945339] RIP: 0033:0x7f6891a13d82 [ 28.945795] 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 [ 28.947906] RSP: 002b:00007fffced87a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.948823] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6891a13d82 [ 28.949671] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6890e4d000 [ 28.950509] RBP: 00007f6890e4d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.951361] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d9dadcec0 [ 28.952199] R13: 00007fffced87a20 R14: 00007fffced87a50 R15: 00007fffced87db0 [ 28.953054] [ 28.953348] [ 28.953563] Allocated by task 212: [ 28.953988] kasan_save_stack+0x22/0x50 [ 28.954493] kasan_set_track+0x25/0x30 [ 28.954986] __kasan_slab_alloc+0x59/0x70 [ 28.955507] kmem_cache_alloc+0x16b/0x370 [ 28.956020] vm_area_dup+0x20/0x160 [ 28.956473] __split_vma+0x170/0x950 [ 28.956946] split_vma+0xc6/0x110 [ 28.957383] mprotect_fixup+0x8d2/0xb30 [ 28.957880] do_mprotect_pkey+0x87e/0xd40 [ 28.958396] __x64_sys_mprotect+0x78/0xc0 [ 28.958921] do_syscall_64+0x3f/0x90 [ 28.959395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.960042] [ 28.960258] Freed by task 212: [ 28.960648] kasan_save_stack+0x22/0x50 [ 28.961174] kasan_set_track+0x25/0x30 [ 28.961664] kasan_save_free_info+0x2b/0x50 [ 28.962194] __kasan_slab_free+0x10a/0x190 [ 28.962731] kmem_cache_free+0x10d/0x4d0 [ 28.963239] rcu_core+0x8c8/0x2860 [ 28.963681] __do_softirq+0x1b7/0x7d4 [ 28.964156] [ 28.964370] Last potentially related work creation: [ 28.964964] kasan_save_stack+0x22/0x50 [ 28.965467] __kasan_record_aux_stack+0x8e/0xa0 [ 28.966039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.966690] remove_vma+0x139/0x170 [ 28.967139] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.967695] do_vmi_munmap+0x1f1/0x2b0 [ 28.968187] __vm_munmap+0x138/0x3a0 [ 28.968659] __x64_sys_munmap+0x59/0x80 [ 28.969174] do_syscall_64+0x3f/0x90 [ 28.969654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.970299] [ 28.970519] The buggy address belongs to the object at ffff88800c500d98 [ 28.970519] which belongs to the cache vm_area_struct of size 168 [ 28.971993] The buggy address is located 88 bytes inside of [ 28.971993] freed 168-byte region [ffff88800c500d98, ffff88800c500e40) [ 28.973414] [ 28.973634] The buggy address belongs to the physical page: [ 28.974286] page:00000000fad3dd57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc500 [ 28.975390] memcg:ffff88800d296501 [ 28.975818] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.976458] page_type: 0xffffffff() [ 28.976919] raw: 0100000000000200 ffff8880087a0c80 ffffea000031e2c0 dead000000000006 [ 28.977840] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d296501 [ 28.978762] page dumped because: kasan: bad access detected [ 28.979426] [ 28.979647] Memory state around the buggy address: [ 28.980231] ffff88800c500c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.981111] ffff88800c500d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.981971] >ffff88800c500d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.982835] ^ [ 28.983665] ffff88800c500e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.984532] ffff88800c500e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.985409] ================================================================== [ 28.986529] Disabling lock debugging due to kernel taint [ 31.706056] BUG: Bad rss-counter state mm:00000000e3f270f1 type:MM_FILEPAGES val:33 [ 31.707247] BUG: Bad rss-counter state mm:00000000e3f270f1 type:MM_ANONPAGES val:22 [ 32.101327] BUG: Bad rss-counter state mm:00000000b01be2fa type:MM_FILEPAGES val:33 [ 32.102455] BUG: Bad rss-counter state mm:00000000b01be2fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52494' (ECDSA) to the list of known hosts. 2023/06/21 04:57:11 fuzzer started 2023/06/21 04:57:11 dialing manager at localhost:36067 2023/06/21 04:57:11 checking machine... 2023/06/21 04:57:11 checking revisions... [ 32.763598] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:57:12 testing simple program... [ 32.798420] cgroup: Unknown subsys name 'net' [ 32.846605] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:57:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fd18486d850 CR3=000000000c4ba000 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=20a44e8ce6cdc491654a70df7b7900df XMM02=2c67c8bc2e329bc3000000000011e480 XMM03=fb795ef6d65770560000000000123a50 XMM04=68a8c1e3f67d9e5000000000000ae988 XMM05=19e9129bd510f2350000000000133948 XMM06=374b1fcb2287367100000000001327b0 XMM07=e042d86d42eb936e0000000000124158 XMM08=b9266f2ce2fbf32e000000000011e4e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864bbb59 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=000000000000000b RSI=0000000000000001 RDI=ffffffff86055348 RBP=ffff88800e81f8a0 RSP=ffff88800e81f7d8 R8 =ffffffff864bbb4e R9 =ffff88800e81f888 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800e81f8a8 R13=ffff88800e81f890 R14=ffff88800e81f889 R15=ffff88800e81f848 RIP=ffffffff81130a72 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 00007f7505304900 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=00007fff12846000 CR3=0000000009770000 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