syzkaller login: [ 30.775974] BUG: Bad rss-counter state mm:00000000446f5246 type:MM_FILEPAGES val:33 [ 30.777016] BUG: Bad rss-counter state mm:00000000446f5246 type:MM_ANONPAGES val:22 [ 30.939500] ================================================================== [ 30.940446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.941400] Read of size 8 at addr ffff888019fe46b0 by task sshd/220 [ 30.942234] [ 30.942474] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.943338] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.944355] Call Trace: [ 30.944673] [ 30.944961] dump_stack_lvl+0x91/0xf0 [ 30.945460] print_report+0xcc/0x620 [ 30.945955] ? __virt_addr_valid+0x102/0x340 [ 30.946517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947149] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947768] kasan_report+0xbe/0xf0 [ 30.948270] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948905] vma_interval_tree_remove+0xc75/0xec0 [ 30.949516] vma_prepare+0xc54/0x11a0 [ 30.949998] __split_vma+0x5af/0x950 [ 30.950477] ? __pfx___split_vma+0x10/0x10 [ 30.951008] ? find_held_lock+0x2c/0x110 [ 30.951528] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.952094] ? lock_is_held_type+0x9f/0x120 [ 30.952651] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.953262] ? mtree_range_walk+0x632/0x900 [ 30.953826] ? mas_walk+0x5c7/0x7c0 [ 30.954313] do_vmi_munmap+0x1f1/0x2b0 [ 30.954808] mmap_region+0x1f9/0x2660 [ 30.955300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.955815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.956543] ? __pfx_lock_acquire+0x10/0x10 [ 30.957088] ? __pfx_mmap_region+0x10/0x10 [ 30.957634] ? security_mmap_addr+0x7d/0xa0 [ 30.958175] ? get_unmapped_area+0x1f5/0x3f0 [ 30.958736] do_mmap+0x854/0xf00 [ 30.959179] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.959687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.960261] ksys_mmap_pgoff+0x3af/0x500 [ 30.960770] do_syscall_64+0x3f/0x90 [ 30.961253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.961900] RIP: 0033:0x7f0ab6723d82 [ 30.962367] 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 [ 30.964570] RSP: 002b:00007ffd5a22fad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.965493] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ab6723d82 [ 30.966342] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ab5b5d000 [ 30.967185] RBP: 00007f0ab5b5d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.968030] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561062f23ec0 [ 30.968896] R13: 00007ffd5a22faf0 R14: 00007ffd5a22fb20 R15: 00007ffd5a22fe80 [ 30.969750] [ 30.970045] [ 30.970269] Allocated by task 213: [ 30.970698] kasan_save_stack+0x22/0x50 [ 30.971203] kasan_set_track+0x25/0x30 [ 30.971710] __kasan_slab_alloc+0x59/0x70 [ 30.972251] kmem_cache_alloc+0x16b/0x370 [ 30.972766] vm_area_dup+0x20/0x160 [ 30.973224] __split_vma+0x170/0x950 [ 30.973696] split_vma+0xc6/0x110 [ 30.974143] mprotect_fixup+0x8d2/0xb30 [ 30.974659] do_mprotect_pkey+0x87e/0xd40 [ 30.975195] __x64_sys_mprotect+0x78/0xc0 [ 30.975721] do_syscall_64+0x3f/0x90 [ 30.976268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976937] [ 30.977162] Freed by task 203: [ 30.977582] kasan_save_stack+0x22/0x50 [ 30.978106] kasan_set_track+0x25/0x30 [ 30.978625] kasan_save_free_info+0x2b/0x50 [ 30.979174] __kasan_slab_free+0x10a/0x190 [ 30.979720] kmem_cache_free+0x10d/0x4d0 [ 30.980266] rcu_core+0x8c8/0x2860 [ 30.980719] __do_softirq+0x1b7/0x7d4 [ 30.981212] [ 30.981427] Last potentially related work creation: [ 30.982031] kasan_save_stack+0x22/0x50 [ 30.982545] __kasan_record_aux_stack+0x8e/0xa0 [ 30.983165] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.983838] remove_vma+0x139/0x170 [ 30.984320] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.984908] do_vmi_munmap+0x1f1/0x2b0 [ 30.985415] __vm_munmap+0x138/0x3a0 [ 30.985899] __x64_sys_munmap+0x59/0x80 [ 30.986375] do_syscall_64+0x3f/0x90 [ 30.986828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.987449] [ 30.987655] The buggy address belongs to the object at ffff888019fe4658 [ 30.987655] which belongs to the cache vm_area_struct of size 168 [ 30.989055] The buggy address is located 88 bytes inside of [ 30.989055] freed 168-byte region [ffff888019fe4658, ffff888019fe4700) [ 30.990491] [ 30.990707] The buggy address belongs to the physical page: [ 30.991390] page:000000007e09316f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fe4 [ 30.992518] memcg:ffff88800ff79601 [ 30.992947] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.993623] page_type: 0xffffffff() [ 30.994098] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.995061] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff79601 [ 30.995959] page dumped because: kasan: bad access detected [ 30.996638] [ 30.996855] Memory state around the buggy address: [ 30.997438] ffff888019fe4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.998291] ffff888019fe4600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.999130] >ffff888019fe4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.999985] ^ [ 31.000575] ffff888019fe4700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.001387] ffff888019fe4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.002189] ================================================================== [ 31.003109] Disabling lock debugging due to kernel taint [ 32.897009] BUG: Bad rss-counter state mm:00000000d346c305 type:MM_FILEPAGES val:33 [ 32.898252] BUG: Bad rss-counter state mm:00000000d346c305 type:MM_ANONPAGES val:22 [ 33.330841] BUG: Bad rss-counter state mm:000000008eb15896 type:MM_FILEPAGES val:33 [ 33.331824] BUG: Bad rss-counter state mm:000000008eb15896 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34702' (ECDSA) to the list of known hosts. 2023/06/20 16:58:22 fuzzer started 2023/06/20 16:58:22 dialing manager at localhost:36067 2023/06/20 16:58:22 checking machine... 2023/06/20 16:58:22 checking revisions... [ 34.074622] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:58:22 testing simple program... [ 34.116104] cgroup: Unknown subsys name 'net' [ 34.167251] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:58:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888016c21e40 RCX=ffffffff812e0135 RDX=ffffed1002d843c9 RSI=0000000000000004 RDI=ffff88800fe0f828 RBP=1ffff11001fc1f01 RSP=ffff88800fe0f7f8 R8 =0000000000000001 R9 =ffffed1002d843c8 R10=ffff888016c21e43 R11=00030009ff02000a R12=ffff888016c21e48 R13=ffff888016c21e50 R14=ffffffff8367562f R15=00000000000000a4 RIP=ffffffff8180fed8 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 00007f260c0c4900 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=00007ffde39ce000 CR3=000000000ca3e000 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=0000000000000002 RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=ffff88806cf09df0 RSI=0000000000000000 RDI=ffff88806cf09a88 RBP=ffff88806cf09b10 RSP=ffff88806cf09a78 R8 =ffffffff86139748 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800c65c380 RIP=ffffffff810bd05d RFL=00000292 [--S-A--] 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=00007f31f877a520 CR3=0000000019c6a000 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=2031323a38353a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a38353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000