syzkaller login: [ 38.351194] BUG: Bad rss-counter state mm:000000001bbf4f65 type:MM_FILEPAGES val:33 [ 38.352589] BUG: Bad rss-counter state mm:000000001bbf4f65 type:MM_ANONPAGES val:22 [ 38.512498] ================================================================== [ 38.513409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.514355] Read of size 8 at addr ffff88800dee56b0 by task sshd/220 [ 38.515218] [ 38.515443] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.516307] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.517303] Call Trace: [ 38.517620] [ 38.517907] dump_stack_lvl+0x91/0xf0 [ 38.518394] print_report+0xcc/0x620 [ 38.518876] ? __virt_addr_valid+0x102/0x340 [ 38.519447] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.520060] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.520677] kasan_report+0xbe/0xf0 [ 38.521145] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.521797] vma_interval_tree_remove+0xc75/0xec0 [ 38.522414] vma_prepare+0xc54/0x11a0 [ 38.522907] __split_vma+0x5af/0x950 [ 38.523387] ? __pfx___split_vma+0x10/0x10 [ 38.523911] ? find_held_lock+0x2c/0x110 [ 38.524431] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.524999] ? lock_is_held_type+0x9f/0x120 [ 38.525548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.526154] ? mtree_range_walk+0x632/0x900 [ 38.526706] ? mas_walk+0x5c7/0x7c0 [ 38.527195] do_vmi_munmap+0x1f1/0x2b0 [ 38.527688] mmap_region+0x1f9/0x2660 [ 38.528169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.528677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.529386] ? __pfx_lock_acquire+0x10/0x10 [ 38.529916] ? __pfx_mmap_region+0x10/0x10 [ 38.530448] ? security_mmap_addr+0x7d/0xa0 [ 38.530977] ? get_unmapped_area+0x1f5/0x3f0 [ 38.531540] do_mmap+0x854/0xf00 [ 38.531976] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.532465] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.533035] ksys_mmap_pgoff+0x3af/0x500 [ 38.533541] do_syscall_64+0x3f/0x90 [ 38.534017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.534660] RIP: 0033:0x7fa65c775d82 [ 38.535134] 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 [ 38.537271] RSP: 002b:00007ffdd618c318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.538186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa65c775d82 [ 38.539035] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa65bbaf000 [ 38.539897] RBP: 00007fa65bbaf000 R08: 0000000000000009 R09: 0000000000001000 [ 38.540753] R10: 0000000000000812 R11: 0000000000000206 R12: 000055954199bec0 [ 38.541596] R13: 00007ffdd618c330 R14: 00007ffdd618c360 R15: 00007ffdd618c6c0 [ 38.542448] [ 38.542743] [ 38.542955] Allocated by task 213: [ 38.543393] kasan_save_stack+0x22/0x50 [ 38.543894] kasan_set_track+0x25/0x30 [ 38.544388] __kasan_slab_alloc+0x59/0x70 [ 38.544907] kmem_cache_alloc+0x16b/0x370 [ 38.545420] vm_area_dup+0x20/0x160 [ 38.545875] __split_vma+0x170/0x950 [ 38.546338] split_vma+0xc6/0x110 [ 38.546784] mprotect_fixup+0x8d2/0xb30 [ 38.547290] do_mprotect_pkey+0x87e/0xd40 [ 38.547807] __x64_sys_mprotect+0x78/0xc0 [ 38.548330] do_syscall_64+0x3f/0x90 [ 38.548802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.549442] [ 38.549656] Freed by task 213: [ 38.550051] kasan_save_stack+0x22/0x50 [ 38.550559] kasan_set_track+0x25/0x30 [ 38.551053] kasan_save_free_info+0x2b/0x50 [ 38.551621] __kasan_slab_free+0x10a/0x190 [ 38.552153] kmem_cache_free+0x10d/0x4d0 [ 38.552660] rcu_core+0x8c8/0x2860 [ 38.553111] __do_softirq+0x1b7/0x7d4 [ 38.553587] [ 38.553802] Last potentially related work creation: [ 38.554381] kasan_save_stack+0x22/0x50 [ 38.554878] __kasan_record_aux_stack+0x8e/0xa0 [ 38.555455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.556107] remove_vma+0x139/0x170 [ 38.556558] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.557136] do_vmi_munmap+0x1f1/0x2b0 [ 38.557624] __vm_munmap+0x138/0x3a0 [ 38.558090] __x64_sys_munmap+0x59/0x80 [ 38.558594] do_syscall_64+0x3f/0x90 [ 38.559065] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.559714] [ 38.559929] Second to last potentially related work creation: [ 38.560619] kasan_save_stack+0x22/0x50 [ 38.561127] __kasan_record_aux_stack+0x8e/0xa0 [ 38.561702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.562345] remove_vma+0x139/0x170 [ 38.562805] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.563376] do_vmi_munmap+0x1f1/0x2b0 [ 38.563868] mmap_region+0x1f9/0x2660 [ 38.564348] do_mmap+0x854/0xf00 [ 38.564781] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.565268] ksys_mmap_pgoff+0x7d/0x500 [ 38.565756] do_syscall_64+0x3f/0x90 [ 38.566229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.566879] [ 38.567102] The buggy address belongs to the object at ffff88800dee5658 [ 38.567102] which belongs to the cache vm_area_struct of size 168 [ 38.568577] The buggy address is located 88 bytes inside of [ 38.568577] freed 168-byte region [ffff88800dee5658, ffff88800dee5700) [ 38.569982] [ 38.570201] The buggy address belongs to the physical page: [ 38.570864] page:000000000a093963 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdee5 [ 38.571953] memcg:ffff88800e040101 [ 38.572379] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.573078] page_type: 0xffffffff() [ 38.573531] raw: 0100000000000200 ffff88800879fc80 ffffea000040ea00 dead000000000007 [ 38.574452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e040101 [ 38.575381] page dumped because: kasan: bad access detected [ 38.576040] [ 38.576254] Memory state around the buggy address: [ 38.576831] ffff88800dee5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.577687] ffff88800dee5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.578539] >ffff88800dee5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.579398] ^ [ 38.579976] ffff88800dee5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.580834] ffff88800dee5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.581690] ================================================================== [ 38.582655] Disabling lock debugging due to kernel taint [ 41.329860] BUG: Bad rss-counter state mm:000000009e2f6d8b type:MM_FILEPAGES val:33 [ 41.331175] BUG: Bad rss-counter state mm:000000009e2f6d8b type:MM_ANONPAGES val:22 [ 41.815074] BUG: Bad rss-counter state mm:000000009a94010b type:MM_FILEPAGES val:33 [ 41.816068] BUG: Bad rss-counter state mm:000000009a94010b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12887' (ECDSA) to the list of known hosts. 2023/06/19 15:14:31 fuzzer started 2023/06/19 15:14:31 dialing manager at localhost:44161 2023/06/19 15:14:31 checking machine... 2023/06/19 15:14:31 checking revisions... [ 42.523328] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:14:31 testing simple program... [ 42.567312] cgroup: Unknown subsys name 'net' [ 42.630657] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:14:23 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fb3bc421010 CR3=0000000016d54000 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=2031333a34313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a34313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8173f6ef RDX=0000000000000001 RSI=ffffffff86127c80 RDI=ffffffff85df244c RBP=ffffffff85df244c RSP=ffff88801a1cf0a0 R8 =ffffffff86127c80 R9 =ffff88801a1cf198 R10=0000000000038001 R11=000000000001e41e R12=ffffffff85df244c R13=ffffffff85df244c R14=ffffffff85df244c R15=dffffc0000000000 RIP=ffffffff8112fc49 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 00007f8d2b15c900 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=00007f8d2b121008 CR3=0000000014652000 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=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