syzkaller login: [ 23.768194] BUG: Bad rss-counter state mm:000000008732843d type:MM_FILEPAGES val:33 [ 23.769529] BUG: Bad rss-counter state mm:000000008732843d type:MM_ANONPAGES val:22 [ 23.916416] ================================================================== [ 23.917311] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.918250] Read of size 8 at addr ffff88800e020228 by task sshd/219 [ 23.919019] [ 23.919239] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.920198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.921172] Call Trace: [ 23.921485] [ 23.921764] dump_stack_lvl+0x91/0xf0 [ 23.922261] print_report+0xcc/0x620 [ 23.922740] ? __virt_addr_valid+0x102/0x340 [ 23.923293] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.923919] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.924535] kasan_report+0xbe/0xf0 [ 23.925005] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.925626] vma_interval_tree_remove+0xc75/0xec0 [ 23.926221] vma_prepare+0xc54/0x11a0 [ 23.926697] __split_vma+0x5af/0x950 [ 23.927163] ? __pfx___split_vma+0x10/0x10 [ 23.927689] ? find_held_lock+0x2c/0x110 [ 23.928208] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.928775] ? lock_is_held_type+0x9f/0x120 [ 23.929306] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.929909] ? mtree_range_walk+0x632/0x900 [ 23.930456] ? mas_walk+0x5c7/0x7c0 [ 23.930929] do_vmi_munmap+0x1f1/0x2b0 [ 23.931417] mmap_region+0x1f9/0x2660 [ 23.931921] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.932422] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.933121] ? __pfx_lock_acquire+0x10/0x10 [ 23.933661] ? __pfx_mmap_region+0x10/0x10 [ 23.934180] ? security_mmap_addr+0x7d/0xa0 [ 23.934709] ? get_unmapped_area+0x1f5/0x3f0 [ 23.935256] do_mmap+0x854/0xf00 [ 23.935693] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.936195] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.936768] ksys_mmap_pgoff+0x3af/0x500 [ 23.937286] do_syscall_64+0x3f/0x90 [ 23.937766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.938408] RIP: 0033:0x7f9a0077cd82 [ 23.938869] 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 [ 23.941012] RSP: 002b:00007ffc70a39e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.941921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a0077cd82 [ 23.942760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99ffbb6000 [ 23.943625] RBP: 00007f99ffbb6000 R08: 0000000000000009 R09: 0000000000001000 [ 23.944468] R10: 0000000000000812 R11: 0000000000000206 R12: 000055902f95dec0 [ 23.945312] R13: 00007ffc70a39eb0 R14: 00007ffc70a39ee0 R15: 00007ffc70a3a240 [ 23.946182] [ 23.946474] [ 23.946692] Allocated by task 212: [ 23.947122] kasan_save_stack+0x22/0x50 [ 23.947633] kasan_set_track+0x25/0x30 [ 23.948148] __kasan_slab_alloc+0x59/0x70 [ 23.948671] kmem_cache_alloc+0x16b/0x370 [ 23.949182] vm_area_dup+0x20/0x160 [ 23.949644] __split_vma+0x170/0x950 [ 23.950109] split_vma+0xc6/0x110 [ 23.950557] mprotect_fixup+0x8d2/0xb30 [ 23.951065] do_mprotect_pkey+0x87e/0xd40 [ 23.951579] __x64_sys_mprotect+0x78/0xc0 [ 23.952122] do_syscall_64+0x3f/0x90 [ 23.952606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.953244] [ 23.953464] Freed by task 212: [ 23.953864] kasan_save_stack+0x22/0x50 [ 23.954365] kasan_set_track+0x25/0x30 [ 23.954869] kasan_save_free_info+0x2b/0x50 [ 23.955398] __kasan_slab_free+0x10a/0x190 [ 23.955932] kmem_cache_free+0x10d/0x4d0 [ 23.956440] rcu_core+0x8c8/0x2860 [ 23.956882] __do_softirq+0x1b7/0x7d4 [ 23.957356] [ 23.957571] Last potentially related work creation: [ 23.958157] kasan_save_stack+0x22/0x50 [ 23.958667] __kasan_record_aux_stack+0x8e/0xa0 [ 23.959239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.959900] remove_vma+0x139/0x170 [ 23.960344] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.960907] do_vmi_munmap+0x1f1/0x2b0 [ 23.961390] __vm_munmap+0x138/0x3a0 [ 23.961867] __x64_sys_munmap+0x59/0x80 [ 23.962361] do_syscall_64+0x3f/0x90 [ 23.962844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.963478] [ 23.963694] Second to last potentially related work creation: [ 23.964396] kasan_save_stack+0x22/0x50 [ 23.964924] __kasan_record_aux_stack+0x8e/0xa0 [ 23.965494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.966123] remove_vma+0x139/0x170 [ 23.966573] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.967134] do_vmi_munmap+0x1f1/0x2b0 [ 23.967622] __vm_munmap+0x138/0x3a0 [ 23.968101] __x64_sys_munmap+0x59/0x80 [ 23.968614] do_syscall_64+0x3f/0x90 [ 23.969097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.969742] [ 23.969962] The buggy address belongs to the object at ffff88800e0201d0 [ 23.969962] which belongs to the cache vm_area_struct of size 168 [ 23.971445] The buggy address is located 88 bytes inside of [ 23.971445] freed 168-byte region [ffff88800e0201d0, ffff88800e020278) [ 23.972853] [ 23.973068] The buggy address belongs to the physical page: [ 23.973724] page:000000002158a534 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe020 [ 23.974794] memcg:ffff88800e089601 [ 23.975224] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.975866] page_type: 0xffffffff() [ 23.976315] raw: 0100000000000200 ffff8880087a0c80 ffffea000038b140 dead000000000002 [ 23.977231] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e089601 [ 23.978126] page dumped because: kasan: bad access detected [ 23.978792] [ 23.979005] Memory state around the buggy address: [ 23.979585] ffff88800e020100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.980434] ffff88800e020180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.981279] >ffff88800e020200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.982111] ^ [ 23.982659] ffff88800e020280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.983517] ffff88800e020300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.984368] ================================================================== [ 23.985330] Disabling lock debugging due to kernel taint [ 25.904849] BUG: Bad rss-counter state mm:000000000421d84e type:MM_FILEPAGES val:33 [ 25.905811] BUG: Bad rss-counter state mm:000000000421d84e type:MM_ANONPAGES val:22 [ 26.358750] BUG: Bad rss-counter state mm:00000000733c4c4b type:MM_FILEPAGES val:33 [ 26.359715] BUG: Bad rss-counter state mm:00000000733c4c4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25473' (ECDSA) to the list of known hosts. 2023/06/20 12:26:07 fuzzer started 2023/06/20 12:26:08 dialing manager at localhost:36067 2023/06/20 12:26:08 checking machine... 2023/06/20 12:26:08 checking revisions... [ 27.022839] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:26:08 testing simple program... [ 27.070772] cgroup: Unknown subsys name 'net' [ 27.116144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:26:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff8880101eb680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88801a0cff58 RSP=ffff88801a0cfed0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000007 R13=00007f19b59d70f0 R14=0000000000000000 R15=ffff888014595340 RIP=ffffffff814c0400 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f19b4e34900 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=00007f19b59d70f0 CR3=00000000189b8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f4432f336f0 CR3=000000000f6f4000 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=2037303a36323a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36323a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000