syzkaller login: [ 38.767113] BUG: Bad rss-counter state mm:00000000423d8509 type:MM_FILEPAGES val:33 [ 38.768588] BUG: Bad rss-counter state mm:00000000423d8509 type:MM_ANONPAGES val:22 [ 38.931550] ================================================================== [ 38.932622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.933730] Read of size 8 at addr ffff88800eccf968 by task sshd/221 [ 38.934819] [ 38.935059] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.935915] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.936913] Call Trace: [ 38.937232] [ 38.937516] dump_stack_lvl+0x91/0xf0 [ 38.938005] print_report+0xcc/0x620 [ 38.938491] ? __virt_addr_valid+0x102/0x340 [ 38.939038] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.939661] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.940295] kasan_report+0xbe/0xf0 [ 38.940768] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.941404] vma_interval_tree_remove+0xc75/0xec0 [ 38.942030] vma_prepare+0xc54/0x11a0 [ 38.942531] __split_vma+0x5af/0x950 [ 38.943022] ? __pfx___split_vma+0x10/0x10 [ 38.943572] ? find_held_lock+0x2c/0x110 [ 38.944139] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.944722] ? lock_is_held_type+0x9f/0x120 [ 38.945289] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.945920] ? mtree_range_walk+0x632/0x900 [ 38.946492] ? mas_walk+0x5c7/0x7c0 [ 38.946982] do_vmi_munmap+0x1f1/0x2b0 [ 38.947496] mmap_region+0x1f9/0x2660 [ 38.947999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.948528] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.949266] ? __pfx_lock_acquire+0x10/0x10 [ 38.949817] ? __pfx_mmap_region+0x10/0x10 [ 38.950366] ? security_mmap_addr+0x7d/0xa0 [ 38.950918] ? get_unmapped_area+0x1f5/0x3f0 [ 38.951493] do_mmap+0x854/0xf00 [ 38.951951] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.952490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.953069] ksys_mmap_pgoff+0x3af/0x500 [ 38.953601] do_syscall_64+0x3f/0x90 [ 38.954105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.954777] RIP: 0033:0x7fa87de6bd82 [ 38.955252] 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 [ 38.957480] RSP: 002b:00007ffe3ed86eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.958422] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa87de6bd82 [ 38.959299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa87d2a5000 [ 38.960202] RBP: 00007fa87d2a5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.961095] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2b59bfd90 [ 38.961984] R13: 00007ffe3ed86ed0 R14: 00007ffe3ed86f00 R15: 00007ffe3ed87260 [ 38.962880] [ 38.963186] [ 38.963405] Allocated by task 214: [ 38.963853] kasan_save_stack+0x22/0x50 [ 38.964397] kasan_set_track+0x25/0x30 [ 38.964906] __kasan_slab_alloc+0x59/0x70 [ 38.965450] kmem_cache_alloc+0x16b/0x370 [ 38.965980] vm_area_dup+0x20/0x160 [ 38.966453] __split_vma+0x170/0x950 [ 38.966940] split_vma+0xc6/0x110 [ 38.967398] mprotect_fixup+0x8d2/0xb30 [ 38.967923] do_mprotect_pkey+0x87e/0xd40 [ 38.968479] __x64_sys_mprotect+0x78/0xc0 [ 38.969025] do_syscall_64+0x3f/0x90 [ 38.969522] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.970200] [ 38.970420] Freed by task 214: [ 38.970828] kasan_save_stack+0x22/0x50 [ 38.971354] kasan_set_track+0x25/0x30 [ 38.971867] kasan_save_free_info+0x2b/0x50 [ 38.972437] __kasan_slab_free+0x10a/0x190 [ 38.972990] kmem_cache_free+0x10d/0x4d0 [ 38.973513] rcu_core+0x8c8/0x2860 [ 38.973976] __do_softirq+0x1b7/0x7d4 [ 38.974479] [ 38.974704] Last potentially related work creation: [ 38.975314] kasan_save_stack+0x22/0x50 [ 38.975880] __kasan_record_aux_stack+0x8e/0xa0 [ 38.976488] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.977171] remove_vma+0x139/0x170 [ 38.977642] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.978221] do_vmi_munmap+0x1f1/0x2b0 [ 38.978736] __vm_munmap+0x138/0x3a0 [ 38.979220] __x64_sys_munmap+0x59/0x80 [ 38.979731] do_syscall_64+0x3f/0x90 [ 38.980251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.980927] [ 38.981149] The buggy address belongs to the object at ffff88800eccf910 [ 38.981149] which belongs to the cache vm_area_struct of size 168 [ 38.982694] The buggy address is located 88 bytes inside of [ 38.982694] freed 168-byte region [ffff88800eccf910, ffff88800eccf9b8) [ 38.984157] [ 38.984383] The buggy address belongs to the physical page: [ 38.985070] page:000000005b8d52a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeccf [ 38.986202] memcg:ffff88800d3e3501 [ 38.986649] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.987320] page_type: 0xffffffff() [ 38.987790] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.988759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3e3501 [ 38.989711] page dumped because: kasan: bad access detected [ 38.990396] [ 38.990622] Memory state around the buggy address: [ 38.991229] ffff88800eccf800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.992131] ffff88800eccf880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.993028] >ffff88800eccf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.993921] ^ [ 38.994740] ffff88800eccf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.995633] ffff88800eccfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.996530] ================================================================== [ 38.997501] Disabling lock debugging due to kernel taint [ 41.324558] BUG: Bad rss-counter state mm:00000000c9551c68 type:MM_FILEPAGES val:33 [ 41.325389] BUG: Bad rss-counter state mm:00000000c9551c68 type:MM_ANONPAGES val:22 [ 41.731830] BUG: Bad rss-counter state mm:0000000019115a60 type:MM_FILEPAGES val:33 [ 41.732862] BUG: Bad rss-counter state mm:0000000019115a60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46755' (ECDSA) to the list of known hosts. 2023/06/21 02:05:00 fuzzer started 2023/06/21 02:05:01 dialing manager at localhost:36067 2023/06/21 02:05:01 checking machine... 2023/06/21 02:05:01 checking revisions... [ 42.422785] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:05:01 testing simple program... [ 42.463755] cgroup: Unknown subsys name 'net' [ 42.512768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:05:00 Registers: info registers vcpu 0 RAX=0000000000002000 RBX=00000000000928c0 RCX=ffffffff8366a4d9 RDX=00000000ffffffff RSI=00000000000928c0 RDI=ffff888008442280 RBP=ffff88801704f670 RSP=ffff88801704f658 R8 =ffff88806ce3d180 R9 =0000000000002000 R10=ffff88801704f690 R11=00000000000b6a61 R12=ffff888008442280 R13=00000000000928c0 R14=0000000000000000 R15=ffff88806ce3d180 RIP=ffffffff81806d4a RFL=00000282 [--S----] 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 00007f0aada8d900 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=00007ffea68ce000 CR3=000000000dbca000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007fcc0275afc0 CR3=0000000013a1c000 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=910f908f90fa7f9a2645ce3ca774421a XMM02=2c67c8bc2e329bc3000000000011b040 XMM03=fb795ef6d657705600000000001219e0 XMM04=b14bcc6be607cb8e00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131598 XMM06=802ee957cde7e4630000000000130770 XMM07=e042d86d42eb936e0000000000121cb8 XMM08=d8c0bfcda85f8882000000000011b0a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000