syzkaller login: [ 28.719430] BUG: Bad rss-counter state mm:000000006250bc5a type:MM_FILEPAGES val:33 [ 28.721394] BUG: Bad rss-counter state mm:000000006250bc5a type:MM_ANONPAGES val:22 [ 28.900100] ================================================================== [ 28.900984] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.901859] Read of size 8 at addr ffff88801a0ce6b0 by task sshd/221 [ 28.902588] [ 28.902797] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.903806] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.904716] Call Trace: [ 28.905017] [ 28.905290] dump_stack_lvl+0x91/0xf0 [ 28.905775] print_report+0xcc/0x620 [ 28.906265] ? __virt_addr_valid+0x102/0x340 [ 28.906781] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907366] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907943] kasan_report+0xbe/0xf0 [ 28.908392] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.908976] vma_interval_tree_remove+0xc75/0xec0 [ 28.909554] vma_prepare+0xc54/0x11a0 [ 28.910014] __split_vma+0x5af/0x950 [ 28.910468] ? __pfx___split_vma+0x10/0x10 [ 28.910963] ? find_held_lock+0x2c/0x110 [ 28.911457] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.911987] ? lock_is_held_type+0x9f/0x120 [ 28.912499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.913067] ? mtree_range_walk+0x632/0x900 [ 28.913590] ? mas_walk+0x5c7/0x7c0 [ 28.914046] do_vmi_munmap+0x1f1/0x2b0 [ 28.914511] mmap_region+0x1f9/0x2660 [ 28.914966] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.915450] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.916119] ? __pfx_lock_acquire+0x10/0x10 [ 28.916623] ? __pfx_mmap_region+0x10/0x10 [ 28.917120] ? security_mmap_addr+0x7d/0xa0 [ 28.917623] ? get_unmapped_area+0x1f5/0x3f0 [ 28.918167] do_mmap+0x854/0xf00 [ 28.918581] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.919050] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.919582] ksys_mmap_pgoff+0x3af/0x500 [ 28.920058] do_syscall_64+0x3f/0x90 [ 28.920509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.921119] RIP: 0033:0x7f11e93f5d82 [ 28.921553] 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 [ 28.923538] RSP: 002b:00007ffcaf3d3d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.924385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11e93f5d82 [ 28.925184] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11e882f000 [ 28.925975] RBP: 00007f11e882f000 R08: 0000000000000009 R09: 0000000000001000 [ 28.926786] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572109fbec0 [ 28.927582] R13: 00007ffcaf3d3d30 R14: 00007ffcaf3d3d60 R15: 00007ffcaf3d40c0 [ 28.928386] [ 28.928661] [ 28.928864] Allocated by task 214: [ 28.929268] kasan_save_stack+0x22/0x50 [ 28.929740] kasan_set_track+0x25/0x30 [ 28.930211] __kasan_slab_alloc+0x59/0x70 [ 28.930715] kmem_cache_alloc+0x16b/0x370 [ 28.931210] vm_area_dup+0x20/0x160 [ 28.931649] __split_vma+0x170/0x950 [ 28.932095] split_vma+0xc6/0x110 [ 28.932516] mprotect_fixup+0x8d2/0xb30 [ 28.932988] do_mprotect_pkey+0x87e/0xd40 [ 28.933480] __x64_sys_mprotect+0x78/0xc0 [ 28.933970] do_syscall_64+0x3f/0x90 [ 28.934445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.935046] [ 28.935253] Freed by task 214: [ 28.935621] kasan_save_stack+0x22/0x50 [ 28.936096] kasan_set_track+0x25/0x30 [ 28.936559] kasan_save_free_info+0x2b/0x50 [ 28.937061] __kasan_slab_free+0x10a/0x190 [ 28.937561] kmem_cache_free+0x10d/0x4d0 [ 28.938044] rcu_core+0x8c8/0x2860 [ 28.938465] __do_softirq+0x1b7/0x7d4 [ 28.938914] [ 28.939120] Last potentially related work creation: [ 28.939671] kasan_save_stack+0x22/0x50 [ 28.940144] __kasan_record_aux_stack+0x8e/0xa0 [ 28.940682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.941283] remove_vma+0x139/0x170 [ 28.941707] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.942237] do_vmi_munmap+0x1f1/0x2b0 [ 28.942691] __vm_munmap+0x138/0x3a0 [ 28.943135] __x64_sys_munmap+0x59/0x80 [ 28.943599] do_syscall_64+0x3f/0x90 [ 28.944043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.944645] [ 28.944923] The buggy address belongs to the object at ffff88801a0ce658 [ 28.944923] which belongs to the cache vm_area_struct of size 168 [ 28.946312] The buggy address is located 88 bytes inside of [ 28.946312] freed 168-byte region [ffff88801a0ce658, ffff88801a0ce700) [ 28.947628] [ 28.947834] The buggy address belongs to the physical page: [ 28.948449] page:00000000b4c31525 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0ce [ 28.949467] memcg:ffff888018165601 [ 28.949868] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.950480] page_type: 0xffffffff() [ 28.950904] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.951762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018165601 [ 28.952607] page dumped because: kasan: bad access detected [ 28.953229] [ 28.953432] Memory state around the buggy address: [ 28.953976] ffff88801a0ce580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.954798] ffff88801a0ce600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.955602] >ffff88801a0ce680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.956394] ^ [ 28.956941] ffff88801a0ce700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.957750] ffff88801a0ce780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.958554] ================================================================== [ 28.959418] Disabling lock debugging due to kernel taint [ 30.873382] BUG: Bad rss-counter state mm:000000007d5d5548 type:MM_FILEPAGES val:33 [ 30.874423] BUG: Bad rss-counter state mm:000000007d5d5548 type:MM_ANONPAGES val:22 [ 31.319057] BUG: Bad rss-counter state mm:000000000063604c type:MM_FILEPAGES val:33 [ 31.319821] BUG: Bad rss-counter state mm:000000000063604c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16643' (ECDSA) to the list of known hosts. 2023/06/21 01:35:43 fuzzer started 2023/06/21 01:35:44 dialing manager at localhost:36067 2023/06/21 01:35:44 checking machine... 2023/06/21 01:35:44 checking revisions... [ 31.950980] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:35:44 testing simple program... [ 31.982969] cgroup: Unknown subsys name 'net' [ 32.012577] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:35:43 Registers: info registers vcpu 0 RAX=00000000108db61a RBX=00000000b2102875 RCX=ffff88800f5cf7fc RDX=000000000000000c RSI=0000000000000003 RDI=00000000282b9955 RBP=0000000000000000 RSP=ffff88800f5cf740 R8 =0000000073e30783 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f5cf7a8 R15=000000000000000c RIP=ffffffff82270472 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 00007f9f1619b900 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=00007f9f16160008 CR3=0000000015dd4000 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=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=00007f4ffd43c5c0 CR3=000000000f0fa000 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=2033343a35333a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a35333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000