syzkaller login: [ 32.505718] BUG: Bad rss-counter state mm:00000000865a225f type:MM_FILEPAGES val:33 [ 32.507220] BUG: Bad rss-counter state mm:00000000865a225f type:MM_ANONPAGES val:22 [ 32.649830] ================================================================== [ 32.650917] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.652034] Read of size 8 at addr ffff888009ae33f8 by task sshd/221 [ 32.653159] [ 32.653384] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.654268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.655263] Call Trace: [ 32.655591] [ 32.655879] dump_stack_lvl+0x91/0xf0 [ 32.656384] print_report+0xcc/0x620 [ 32.656871] ? __virt_addr_valid+0x102/0x340 [ 32.657434] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.658058] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.658685] kasan_report+0xbe/0xf0 [ 32.659167] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.659785] vma_interval_tree_remove+0xc75/0xec0 [ 32.660399] vma_prepare+0xc54/0x11a0 [ 32.660877] __split_vma+0x5af/0x950 [ 32.661353] ? __pfx___split_vma+0x10/0x10 [ 32.661880] ? find_held_lock+0x2c/0x110 [ 32.662406] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.662980] ? lock_is_held_type+0x9f/0x120 [ 32.663525] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.664134] ? mtree_range_walk+0x632/0x900 [ 32.664709] ? mas_walk+0x5c7/0x7c0 [ 32.665195] do_vmi_munmap+0x1f1/0x2b0 [ 32.665686] mmap_region+0x1f9/0x2660 [ 32.666171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.666691] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.667427] ? __pfx_lock_acquire+0x10/0x10 [ 32.667960] ? __pfx_mmap_region+0x10/0x10 [ 32.668508] ? security_mmap_addr+0x7d/0xa0 [ 32.669052] ? get_unmapped_area+0x1f5/0x3f0 [ 32.669606] do_mmap+0x854/0xf00 [ 32.670044] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.670542] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.671111] ksys_mmap_pgoff+0x3af/0x500 [ 32.671619] do_syscall_64+0x3f/0x90 [ 32.672099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.672752] RIP: 0033:0x7f426ce93d82 [ 32.673208] 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 [ 32.675337] RSP: 002b:00007ffefed73298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.676258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f426ce93d82 [ 32.677111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f426c2cd000 [ 32.677957] RBP: 00007f426c2cd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.678801] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bf78dbec0 [ 32.679652] R13: 00007ffefed732b0 R14: 00007ffefed732e0 R15: 00007ffefed73640 [ 32.680524] [ 32.680816] [ 32.681034] Allocated by task 214: [ 32.681465] kasan_save_stack+0x22/0x50 [ 32.681970] kasan_set_track+0x25/0x30 [ 32.682466] __kasan_slab_alloc+0x59/0x70 [ 32.682986] kmem_cache_alloc+0x16b/0x370 [ 32.683511] vm_area_dup+0x20/0x160 [ 32.683964] __split_vma+0x170/0x950 [ 32.684456] split_vma+0xc6/0x110 [ 32.684903] mprotect_fixup+0x8d2/0xb30 [ 32.685411] do_mprotect_pkey+0x87e/0xd40 [ 32.685939] __x64_sys_mprotect+0x78/0xc0 [ 32.686469] do_syscall_64+0x3f/0x90 [ 32.686940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.687580] [ 32.687799] Freed by task 214: [ 32.688200] kasan_save_stack+0x22/0x50 [ 32.688716] kasan_set_track+0x25/0x30 [ 32.689217] kasan_save_free_info+0x2b/0x50 [ 32.689750] __kasan_slab_free+0x10a/0x190 [ 32.690280] kmem_cache_free+0x10d/0x4d0 [ 32.690795] rcu_core+0x8c8/0x2860 [ 32.691242] __do_softirq+0x1b7/0x7d4 [ 32.691722] [ 32.691937] Last potentially related work creation: [ 32.692557] kasan_save_stack+0x22/0x50 [ 32.693069] __kasan_record_aux_stack+0x8e/0xa0 [ 32.693658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.694371] remove_vma+0x139/0x170 [ 32.694835] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.695401] do_vmi_munmap+0x1f1/0x2b0 [ 32.695892] __vm_munmap+0x138/0x3a0 [ 32.696370] __x64_sys_munmap+0x59/0x80 [ 32.696864] do_syscall_64+0x3f/0x90 [ 32.697335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.697975] [ 32.698191] The buggy address belongs to the object at ffff888009ae33a0 [ 32.698191] which belongs to the cache vm_area_struct of size 168 [ 32.699677] The buggy address is located 88 bytes inside of [ 32.699677] freed 168-byte region [ffff888009ae33a0, ffff888009ae3448) [ 32.701138] [ 32.701362] The buggy address belongs to the physical page: [ 32.702021] page:00000000bd8adbdd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9ae3 [ 32.703101] memcg:ffff88801413d301 [ 32.703530] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.704195] page_type: 0xffffffff() [ 32.704654] raw: 0100000000000200 ffff88800879fc80 ffffea000026b840 dead000000000008 [ 32.705571] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801413d301 [ 32.706476] page dumped because: kasan: bad access detected [ 32.707138] [ 32.707355] Memory state around the buggy address: [ 32.707932] ffff888009ae3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.708789] ffff888009ae3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.709633] >ffff888009ae3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.710486] ^ [ 32.711322] ffff888009ae3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.712197] ffff888009ae3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.713040] ================================================================== [ 32.713947] Disabling lock debugging due to kernel taint [ 35.240832] BUG: Bad rss-counter state mm:000000008ebdd3c3 type:MM_FILEPAGES val:33 [ 35.241910] BUG: Bad rss-counter state mm:000000008ebdd3c3 type:MM_ANONPAGES val:22 [ 35.708501] BUG: Bad rss-counter state mm:00000000dd19d1a6 type:MM_FILEPAGES val:33 [ 35.710125] BUG: Bad rss-counter state mm:00000000dd19d1a6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8689' (ECDSA) to the list of known hosts. 2023/06/19 14:19:39 fuzzer started 2023/06/19 14:19:39 dialing manager at localhost:44161 2023/06/19 14:19:39 checking machine... 2023/06/19 14:19:39 checking revisions... [ 36.443003] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:19:39 testing simple program... [ 36.495911] cgroup: Unknown subsys name 'net' [ 36.536465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:19:38 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014210000 RCX=ffff8880161cf4b0 RDX=ffff8880161cf490 RSI=ffff888014210000 RDI=ffff8880161cf440 RBP=ffff8880161cf4b0 RSP=ffff8880161cf420 R8 =0000000000000001 R9 =0000000000000000 R10=ffff8880161cf490 R11=00000000000b6996 R12=ffff8880161cf490 R13=ffff8880161cf4b8 R14=ffff8880161cf4d8 R15=ffff8880161cf490 RIP=ffffffff8108df77 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 00007f57565b0900 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=00007ffc25655000 CR3=000000000c6a2000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f6aba1b1010 CR3=0000000009ac8000 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=2039333a39313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a39313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000