syzkaller login: [ 23.895478] BUG: Bad rss-counter state mm:000000005fc0db78 type:MM_FILEPAGES val:33 [ 23.896981] BUG: Bad rss-counter state mm:000000005fc0db78 type:MM_ANONPAGES val:22 [ 23.969668] ================================================================== [ 23.970774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.971961] Read of size 8 at addr ffff888014395880 by task sshd/219 [ 23.972777] [ 23.972997] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.973880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.974850] Call Trace: [ 23.975170] <TASK> [ 23.975452] dump_stack_lvl+0x91/0xf0 [ 23.975954] print_report+0xcc/0x620 [ 23.976445] ? __virt_addr_valid+0x102/0x340 [ 23.976996] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.977608] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.978218] kasan_report+0xbe/0xf0 [ 23.978693] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.979303] vma_interval_tree_remove+0xc75/0xec0 [ 23.979917] vma_prepare+0xc54/0x11a0 [ 23.980393] __split_vma+0x5af/0x950 [ 23.980869] ? __pfx___split_vma+0x10/0x10 [ 23.981391] ? find_held_lock+0x2c/0x110 [ 23.981905] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.982470] ? lock_is_held_type+0x9f/0x120 [ 23.983004] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.983614] ? mtree_range_walk+0x632/0x900 [ 23.984161] ? mas_walk+0x5c7/0x7c0 [ 23.984631] do_vmi_munmap+0x1f1/0x2b0 [ 23.985126] mmap_region+0x1f9/0x2660 [ 23.985609] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.986112] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.986823] ? __pfx_lock_acquire+0x10/0x10 [ 23.987349] ? __pfx_mmap_region+0x10/0x10 [ 23.987895] ? security_mmap_addr+0x7d/0xa0 [ 23.988421] ? get_unmapped_area+0x1f5/0x3f0 [ 23.988967] do_mmap+0x854/0xf00 [ 23.989405] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.989893] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.990454] ksys_mmap_pgoff+0x3af/0x500 [ 23.990954] do_syscall_64+0x3f/0x90 [ 23.991429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.992081] RIP: 0033:0x7f806b391d82 [ 23.992546] 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 [ 23.994655] RSP: 002b:00007ffdcc399be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.995565] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f806b391d82 [ 23.996399] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f806a7cb000 [ 23.997243] RBP: 00007f806a7cb000 R08: 0000000000000009 R09: 0000000000001000 [ 23.998083] R10: 0000000000000812 R11: 0000000000000206 R12: 000056271cee8d90 [ 23.998919] R13: 00007ffdcc399c00 R14: 00007ffdcc399c30 R15: 00007ffdcc399f90 [ 23.999783] </TASK> [ 24.000072] [ 24.000287] Allocated by task 212: [ 24.000713] kasan_save_stack+0x22/0x50 [ 24.001217] kasan_set_track+0x25/0x30 [ 24.001710] __kasan_slab_alloc+0x59/0x70 [ 24.002231] kmem_cache_alloc+0x16b/0x370 [ 24.002740] vm_area_dup+0x20/0x160 [ 24.003188] __split_vma+0x170/0x950 [ 24.003667] split_vma+0xc6/0x110 [ 24.004101] mprotect_fixup+0x8d2/0xb30 [ 24.004601] do_mprotect_pkey+0x87e/0xd40 [ 24.005117] __x64_sys_mprotect+0x78/0xc0 [ 24.005639] do_syscall_64+0x3f/0x90 [ 24.006154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.006811] [ 24.007025] Freed by task 212: [ 24.007426] kasan_save_stack+0x22/0x50 [ 24.007950] kasan_set_track+0x25/0x30 [ 24.008447] kasan_save_free_info+0x2b/0x50 [ 24.008979] __kasan_slab_free+0x10a/0x190 [ 24.009510] kmem_cache_free+0x10d/0x4d0 [ 24.010015] rcu_core+0x8c8/0x2860 [ 24.010461] __do_softirq+0x1b7/0x7d4 [ 24.010935] [ 24.011150] Last potentially related work creation: [ 24.011751] kasan_save_stack+0x22/0x50 [ 24.012261] __kasan_record_aux_stack+0x8e/0xa0 [ 24.012827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.013469] remove_vma+0x139/0x170 [ 24.013916] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.014479] do_vmi_munmap+0x1f1/0x2b0 [ 24.014963] __vm_munmap+0x138/0x3a0 [ 24.015435] __x64_sys_munmap+0x59/0x80 [ 24.015944] do_syscall_64+0x3f/0x90 [ 24.016416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.017049] [ 24.017263] The buggy address belongs to the object at ffff888014395828 [ 24.017263] which belongs to the cache vm_area_struct of size 168 [ 24.018702] The buggy address is located 88 bytes inside of [ 24.018702] freed 168-byte region [ffff888014395828, ffff8880143958d0) [ 24.020106] [ 24.020320] The buggy address belongs to the physical page: [ 24.020966] page:000000007b099263 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14395 [ 24.022039] memcg:ffff8880165d9b01 [ 24.022461] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.023156] page_type: 0xffffffff() [ 24.023619] raw: 0100000000000200 ffff8880087a0c80 ffffea0000394140 dead00000000000b [ 24.024535] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165d9b01 [ 24.025427] page dumped because: kasan: bad access detected [ 24.026073] [ 24.026289] Memory state around the buggy address: [ 24.026859] ffff888014395780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.027726] ffff888014395800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.028569] >ffff888014395880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.029405] ^ [ 24.029819] ffff888014395900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.030668] ffff888014395980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 24.031503] ================================================================== [ 24.032784] Disabling lock debugging due to kernel taint [ 26.004857] BUG: Bad rss-counter state mm:00000000e4d6adee type:MM_FILEPAGES val:33 [ 26.005866] BUG: Bad rss-counter state mm:00000000e4d6adee type:MM_ANONPAGES val:22 [ 26.492870] BUG: Bad rss-counter state mm:00000000ee699998 type:MM_FILEPAGES val:33 [ 26.494444] BUG: Bad rss-counter state mm:00000000ee699998 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34106' (ECDSA) to the list of known hosts. 2023/06/20 13:09:14 fuzzer started 2023/06/20 13:09:14 dialing manager at localhost:36067 2023/06/20 13:09:14 checking machine... 2023/06/20 13:09:14 checking revisions... [ 27.214584] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:09:14 testing simple program... [ 27.273471] cgroup: Unknown subsys name 'net' [ 27.316646] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:09:13 Registers: info registers vcpu 0 RAX=1ffff1100134d213 RBX=ffff888009a69068 RCX=1ffff11001a59c14 RDX=dffffc0000000000 RSI=ffff888016140540 RDI=ffff888009a69098 RBP=ffff88800d2ce070 RSP=ffff888014267cd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888016140000 R13=0000000000000000 R14=ffff888018c8fe88 R15=ffff888018c8fe40 RIP=ffffffff8184767e RFL=00000046 [---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 00007ff012549900 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=00007fffe457b000 CR3=0000000018f62000 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=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000101f2 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f3701a0 RSP=ffff88800a23f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f2 R11=0000000000000128 R12=00000000000101f2 R13=ffff88800f370050 R14=ffff88800f370048 R15=ffff88800f370060 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] 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 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=00007feecb7ef190 CR3=000000000e3b2000 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=2033313a39303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a39303a3331203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000