syzkaller login: [ 28.710690] BUG: Bad rss-counter state mm:000000000f912868 type:MM_FILEPAGES val:33 [ 28.711889] BUG: Bad rss-counter state mm:000000000f912868 type:MM_ANONPAGES val:22 [ 28.857779] ================================================================== [ 28.858725] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.859691] Read of size 8 at addr ffff88800df87310 by task sshd/220 [ 28.860471] [ 28.860688] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.861776] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.862754] Call Trace: [ 28.863074] [ 28.863357] dump_stack_lvl+0x91/0xf0 [ 28.863853] print_report+0xcc/0x620 [ 28.864343] ? __virt_addr_valid+0x102/0x340 [ 28.864891] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.865537] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.866148] kasan_report+0xbe/0xf0 [ 28.866635] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.867260] vma_interval_tree_remove+0xc75/0xec0 [ 28.867862] vma_prepare+0xc54/0x11a0 [ 28.868343] __split_vma+0x5af/0x950 [ 28.868813] ? __pfx___split_vma+0x10/0x10 [ 28.869353] ? find_held_lock+0x2c/0x110 [ 28.869874] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.870443] ? lock_is_held_type+0x9f/0x120 [ 28.870987] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.871600] ? mtree_range_walk+0x632/0x900 [ 28.872155] ? mas_walk+0x5c7/0x7c0 [ 28.872634] do_vmi_munmap+0x1f1/0x2b0 [ 28.873132] mmap_region+0x1f9/0x2660 [ 28.873638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.874158] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.874875] ? __pfx_lock_acquire+0x10/0x10 [ 28.875406] ? __pfx_mmap_region+0x10/0x10 [ 28.875938] ? security_mmap_addr+0x7d/0xa0 [ 28.876465] ? get_unmapped_area+0x1f5/0x3f0 [ 28.877016] do_mmap+0x854/0xf00 [ 28.877466] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.877960] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.878523] ksys_mmap_pgoff+0x3af/0x500 [ 28.879039] do_syscall_64+0x3f/0x90 [ 28.879521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.880171] RIP: 0033:0x7efc5e157d82 [ 28.880634] 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 [ 28.882770] RSP: 002b:00007ffea96011d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.883682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc5e157d82 [ 28.884538] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc5d591000 [ 28.885422] RBP: 00007efc5d591000 R08: 0000000000000009 R09: 0000000000001000 [ 28.886288] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b88d8ccd90 [ 28.887173] R13: 00007ffea96011f0 R14: 00007ffea9601220 R15: 00007ffea9601580 [ 28.888073] [ 28.888374] [ 28.888590] Allocated by task 212: [ 28.889046] kasan_save_stack+0x22/0x50 [ 28.889560] kasan_set_track+0x25/0x30 [ 28.890062] __kasan_slab_alloc+0x59/0x70 [ 28.890605] kmem_cache_alloc+0x16b/0x370 [ 28.891127] vm_area_dup+0x20/0x160 [ 28.891604] __split_vma+0x170/0x950 [ 28.892074] split_vma+0xc6/0x110 [ 28.892544] mprotect_fixup+0x8d2/0xb30 [ 28.893062] do_mprotect_pkey+0x87e/0xd40 [ 28.893594] __x64_sys_mprotect+0x78/0xc0 [ 28.894126] do_syscall_64+0x3f/0x90 [ 28.894605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.895282] [ 28.895506] Freed by task 212: [ 28.895900] kasan_save_stack+0x22/0x50 [ 28.896420] kasan_set_track+0x25/0x30 [ 28.896928] kasan_save_free_info+0x2b/0x50 [ 28.897519] __kasan_slab_free+0x10a/0x190 [ 28.898049] kmem_cache_free+0x10d/0x4d0 [ 28.898560] rcu_core+0x8c8/0x2860 [ 28.899028] __do_softirq+0x1b7/0x7d4 [ 28.899522] [ 28.899740] Last potentially related work creation: [ 28.900326] kasan_save_stack+0x22/0x50 [ 28.900852] __kasan_record_aux_stack+0x8e/0xa0 [ 28.901440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.902087] remove_vma+0x139/0x170 [ 28.902543] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.903180] do_vmi_munmap+0x1f1/0x2b0 [ 28.903670] __vm_munmap+0x138/0x3a0 [ 28.904140] __x64_sys_munmap+0x59/0x80 [ 28.904647] do_syscall_64+0x3f/0x90 [ 28.905132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.905804] [ 28.906022] The buggy address belongs to the object at ffff88800df872b8 [ 28.906022] which belongs to the cache vm_area_struct of size 168 [ 28.907519] The buggy address is located 88 bytes inside of [ 28.907519] freed 168-byte region [ffff88800df872b8, ffff88800df87360) [ 28.908940] [ 28.909154] The buggy address belongs to the physical page: [ 28.909826] page:00000000a4467b99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf87 [ 28.910936] memcg:ffff88800ed2dc01 [ 28.911370] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.912018] page_type: 0xffffffff() [ 28.912484] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384040 dead000000000004 [ 28.913418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed2dc01 [ 28.914349] page dumped because: kasan: bad access detected [ 28.915013] [ 28.915230] Memory state around the buggy address: [ 28.915811] ffff88800df87200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.916708] ffff88800df87280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.917601] >ffff88800df87300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.918474] ^ [ 28.918971] ffff88800df87380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.919838] ffff88800df87400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.920712] ================================================================== [ 28.921773] Disabling lock debugging due to kernel taint [ 31.485934] BUG: Bad rss-counter state mm:00000000e1d6979c type:MM_FILEPAGES val:33 [ 31.486933] BUG: Bad rss-counter state mm:00000000e1d6979c type:MM_ANONPAGES val:22 [ 31.990579] BUG: Bad rss-counter state mm:0000000021580ff0 type:MM_FILEPAGES val:33 [ 31.991628] BUG: Bad rss-counter state mm:0000000021580ff0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54361' (ECDSA) to the list of known hosts. 2023/06/20 23:30:31 fuzzer started 2023/06/20 23:30:31 dialing manager at localhost:36067 2023/06/20 23:30:31 checking machine... 2023/06/20 23:30:31 checking revisions... [ 32.719525] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:30:32 testing simple program... [ 32.775053] cgroup: Unknown subsys name 'net' [ 32.814218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:30:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000d40 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000132 RDI=ffff888015ed36ac RBP=ffff88800d03fa00 RSP=ffff88800d03f9b0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800bf6b640 R13=0000000000000c40 R14=0000000000000000 R15=ffffffff81c619e4 RIP=ffffffff818081c8 RFL=00000202 [-------] 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 00007fdffd4d8700 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=00007f316106c840 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=2031333a30333a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a30333a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff831498a0 RBX=00000000fffffffe RCX=0000000000000000 RDX=ffff88800f177d28 RSI=0000000000000001 RDI=ffffffff85a63bc0 RBP=ffffffff85a63bc0 RSP=ffff88800f177bf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000000 R13=dffffc0000000000 R14=ffffffff85bae5e0 R15=0000000000000001 RIP=ffffffff831498a4 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 00007f3ceb6e4900 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=00007fff0752c000 CR3=000000000c598000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000