syzkaller login: [ 30.554227] BUG: Bad rss-counter state mm:0000000011b7cf1f type:MM_FILEPAGES val:33 [ 30.555667] BUG: Bad rss-counter state mm:0000000011b7cf1f type:MM_ANONPAGES val:22 [ 30.727970] ================================================================== [ 30.728885] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.729876] Read of size 8 at addr ffff88800e3296b0 by task sshd/221 [ 30.730766] [ 30.730994] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.731898] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.732936] Call Trace: [ 30.733257] [ 30.733574] dump_stack_lvl+0x91/0xf0 [ 30.734082] print_report+0xcc/0x620 [ 30.734577] ? __virt_addr_valid+0x102/0x340 [ 30.735140] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.735773] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.736395] kasan_report+0xbe/0xf0 [ 30.736888] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.737623] vma_interval_tree_remove+0xc75/0xec0 [ 30.738248] vma_prepare+0xc54/0x11a0 [ 30.738740] __split_vma+0x5af/0x950 [ 30.739265] ? __pfx___split_vma+0x10/0x10 [ 30.739794] ? find_held_lock+0x2c/0x110 [ 30.740347] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.740914] ? lock_is_held_type+0x9f/0x120 [ 30.741464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.742097] ? mtree_range_walk+0x632/0x900 [ 30.742654] ? mas_walk+0x5c7/0x7c0 [ 30.743140] do_vmi_munmap+0x1f1/0x2b0 [ 30.743640] mmap_region+0x1f9/0x2660 [ 30.744129] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.744652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.745380] ? __pfx_lock_acquire+0x10/0x10 [ 30.745941] ? __pfx_mmap_region+0x10/0x10 [ 30.746481] ? security_mmap_addr+0x7d/0xa0 [ 30.747018] ? get_unmapped_area+0x1f5/0x3f0 [ 30.747579] do_mmap+0x854/0xf00 [ 30.748026] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.748528] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.749104] ksys_mmap_pgoff+0x3af/0x500 [ 30.749632] do_syscall_64+0x3f/0x90 [ 30.750121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.750785] RIP: 0033:0x7fac0c9c4d82 [ 30.751244] 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 [ 30.753401] RSP: 002b:00007ffd543c0728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.754325] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac0c9c4d82 [ 30.755169] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac0bdfe000 [ 30.756013] RBP: 00007fac0bdfe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.756867] R10: 0000000000000812 R11: 0000000000000206 R12: 000055872694ef70 [ 30.757756] R13: 00007ffd543c0740 R14: 00007ffd543c0770 R15: 00007ffd543c0ad0 [ 30.758618] [ 30.758919] [ 30.759135] Allocated by task 214: [ 30.759565] kasan_save_stack+0x22/0x50 [ 30.760076] kasan_set_track+0x25/0x30 [ 30.760572] __kasan_slab_alloc+0x59/0x70 [ 30.761098] kmem_cache_alloc+0x16b/0x370 [ 30.761627] vm_area_dup+0x20/0x160 [ 30.762093] __split_vma+0x170/0x950 [ 30.762568] split_vma+0xc6/0x110 [ 30.763014] mprotect_fixup+0x8d2/0xb30 [ 30.763524] do_mprotect_pkey+0x87e/0xd40 [ 30.764054] __x64_sys_mprotect+0x78/0xc0 [ 30.764582] do_syscall_64+0x3f/0x90 [ 30.765062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765725] [ 30.765947] Freed by task 204: [ 30.766340] kasan_save_stack+0x22/0x50 [ 30.766845] kasan_set_track+0x25/0x30 [ 30.767345] kasan_save_free_info+0x2b/0x50 [ 30.767888] __kasan_slab_free+0x10a/0x190 [ 30.768430] kmem_cache_free+0x10d/0x4d0 [ 30.768943] rcu_core+0x8c8/0x2860 [ 30.769394] __do_softirq+0x1b7/0x7d4 [ 30.769899] [ 30.770122] Last potentially related work creation: [ 30.770713] kasan_save_stack+0x22/0x50 [ 30.771222] __kasan_record_aux_stack+0x8e/0xa0 [ 30.771801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.772454] remove_vma+0x139/0x170 [ 30.772914] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.773481] do_vmi_munmap+0x1f1/0x2b0 [ 30.773972] __vm_munmap+0x138/0x3a0 [ 30.774448] __x64_sys_munmap+0x59/0x80 [ 30.774955] do_syscall_64+0x3f/0x90 [ 30.775434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.776090] [ 30.776305] Second to last potentially related work creation: [ 30.777000] kasan_save_stack+0x22/0x50 [ 30.777509] __kasan_record_aux_stack+0x8e/0xa0 [ 30.778099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.778746] remove_vma+0x139/0x170 [ 30.779204] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.779767] do_vmi_munmap+0x1f1/0x2b0 [ 30.780259] mmap_region+0x1f9/0x2660 [ 30.780742] do_mmap+0x854/0xf00 [ 30.781185] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.781690] ksys_mmap_pgoff+0x3af/0x500 [ 30.782197] do_syscall_64+0x3f/0x90 [ 30.782676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783331] [ 30.783551] The buggy address belongs to the object at ffff88800e329658 [ 30.783551] which belongs to the cache vm_area_struct of size 168 [ 30.785043] The buggy address is located 88 bytes inside of [ 30.785043] freed 168-byte region [ffff88800e329658, ffff88800e329700) [ 30.786479] [ 30.786697] The buggy address belongs to the physical page: [ 30.787371] page:00000000df194b8f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe329 [ 30.788465] memcg:ffff88800c595301 [ 30.788898] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.789631] page_type: 0xffffffff() [ 30.790090] raw: 0100000000000200 ffff8880087a0c80 ffffea000037d500 dead000000000003 [ 30.791015] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c595301 [ 30.791936] page dumped because: kasan: bad access detected [ 30.792599] [ 30.792816] Memory state around the buggy address: [ 30.793403] ffff88800e329580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.794278] ffff88800e329600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.795137] >ffff88800e329680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.796005] ^ [ 30.796594] ffff88800e329700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.797460] ffff88800e329780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.798340] ================================================================== [ 30.799365] Disabling lock debugging due to kernel taint [ 33.231248] BUG: Bad rss-counter state mm:000000007b2b5ede type:MM_FILEPAGES val:33 [ 33.232348] BUG: Bad rss-counter state mm:000000007b2b5ede type:MM_ANONPAGES val:22 [ 33.712633] BUG: Bad rss-counter state mm:0000000022550150 type:MM_FILEPAGES val:33 [ 33.713636] BUG: Bad rss-counter state mm:0000000022550150 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27019' (ECDSA) to the list of known hosts. 2023/06/21 08:50:46 fuzzer started 2023/06/21 08:50:46 dialing manager at localhost:36067 2023/06/21 08:50:46 checking machine... 2023/06/21 08:50:46 checking revisions... [ 34.476398] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:50:46 testing simple program... [ 34.525568] cgroup: Unknown subsys name 'net' [ 34.587627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:50:46 Registers: info registers vcpu 0 RAX=1ffffffff0a92574 RBX=ffffffff85d3e490 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff848ff1e0 RDI=ffffffff87b89c40 RBP=ffffffff87b89c40 RSP=ffff8880146a7560 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff87b89c40 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff888016d71e40 RIP=ffffffff812c19de 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 00007fbe1ed81900 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=00007fbe1e1ff620 CR3=000000000f046000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f3f42549766a0dac00000000000ae988 XMM05=dd91201f3700787300000000001345d8 XMM06=c291bd5c70af25b900000000001333c8 XMM07=fb795ef6d65770560000000000122318 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffba66b9d RBX=ffffffff85e0501c RCX=ffffffff8186bb7a RDX=0000000000000000 RSI=ffffffff86143674 RDI=ffffffff85e0500c RBP=ffffffff85e0500c RSP=ffff88800ee379e8 R8 =ffffffff86143674 R9 =ffff88800ee37ae0 R10=0000000000038001 R11=0000000000022992 R12=ffffffff85e0502c R13=ffffffff85e0500c R14=ffffffff85e0500c R15=dffffc0000000000 RIP=ffffffff8112fc93 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 00007f293dd01900 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=00007ffd99814000 CR3=000000000dce6000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000