syzkaller login: [ 28.771084] BUG: Bad rss-counter state mm:00000000cdf605e8 type:MM_FILEPAGES val:33 [ 28.772258] BUG: Bad rss-counter state mm:00000000cdf605e8 type:MM_ANONPAGES val:22 [ 28.953401] ================================================================== [ 28.954366] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.955366] Read of size 8 at addr ffff88800dc20ed8 by task sshd/220 [ 28.956365] [ 28.956599] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.957547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.958589] Call Trace: [ 28.958932] [ 28.959233] dump_stack_lvl+0x91/0xf0 [ 28.959750] print_report+0xcc/0x620 [ 28.960264] ? __virt_addr_valid+0x102/0x340 [ 28.960847] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.961512] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.962169] kasan_report+0xbe/0xf0 [ 28.962675] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.963332] vma_interval_tree_remove+0xc75/0xec0 [ 28.963967] vma_prepare+0xc54/0x11a0 [ 28.964474] __split_vma+0x5af/0x950 [ 28.964975] ? __pfx___split_vma+0x10/0x10 [ 28.965555] ? find_held_lock+0x2c/0x110 [ 28.966117] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.966718] ? lock_is_held_type+0x9f/0x120 [ 28.967290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.967936] ? mtree_range_walk+0x632/0x900 [ 28.968525] ? mas_walk+0x5c7/0x7c0 [ 28.969036] do_vmi_munmap+0x1f1/0x2b0 [ 28.969585] mmap_region+0x1f9/0x2660 [ 28.970109] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.970688] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.971449] ? __pfx_lock_acquire+0x10/0x10 [ 28.972015] ? __pfx_mmap_region+0x10/0x10 [ 28.972576] ? security_mmap_addr+0x7d/0xa0 [ 28.973139] ? get_unmapped_area+0x1f5/0x3f0 [ 28.973738] do_mmap+0x854/0xf00 [ 28.974205] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.974732] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.975343] ksys_mmap_pgoff+0x3af/0x500 [ 28.975882] do_syscall_64+0x3f/0x90 [ 28.976400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.977096] RIP: 0033:0x7fc2abd33d82 [ 28.977597] 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 [ 28.979869] RSP: 002b:00007ffe9a677698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.980832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2abd33d82 [ 28.981755] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2ab16d000 [ 28.982655] RBP: 00007fc2ab16d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.983555] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e152d7ed90 [ 28.984459] R13: 00007ffe9a6776b0 R14: 00007ffe9a6776e0 R15: 00007ffe9a677a40 [ 28.985387] [ 28.985698] [ 28.985930] Allocated by task 212: [ 28.986386] kasan_save_stack+0x22/0x50 [ 28.986923] kasan_set_track+0x25/0x30 [ 28.987454] __kasan_slab_alloc+0x59/0x70 [ 28.988009] kmem_cache_alloc+0x16b/0x370 [ 28.988559] vm_area_dup+0x20/0x160 [ 28.989045] __split_vma+0x170/0x950 [ 28.989551] split_vma+0xc6/0x110 [ 28.990018] mprotect_fixup+0x8d2/0xb30 [ 28.990553] do_mprotect_pkey+0x87e/0xd40 [ 28.991106] __x64_sys_mprotect+0x78/0xc0 [ 28.991658] do_syscall_64+0x3f/0x90 [ 28.992167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.992847] [ 28.993077] Freed by task 212: [ 28.993509] kasan_save_stack+0x22/0x50 [ 28.994048] kasan_set_track+0x25/0x30 [ 28.994579] kasan_save_free_info+0x2b/0x50 [ 28.995146] __kasan_slab_free+0x10a/0x190 [ 28.995710] kmem_cache_free+0x10d/0x4d0 [ 28.996254] rcu_core+0x8c8/0x2860 [ 28.996824] __do_softirq+0x1b7/0x7d4 [ 28.997357] [ 28.997585] Last potentially related work creation: [ 28.998208] kasan_save_stack+0x22/0x50 [ 28.998745] __kasan_record_aux_stack+0x8e/0xa0 [ 28.999350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.000035] remove_vma+0x139/0x170 [ 29.000512] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.001099] do_vmi_munmap+0x1f1/0x2b0 [ 29.001635] __vm_munmap+0x138/0x3a0 [ 29.002134] __x64_sys_munmap+0x59/0x80 [ 29.002666] do_syscall_64+0x3f/0x90 [ 29.003174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.003860] [ 29.004093] The buggy address belongs to the object at ffff88800dc20e80 [ 29.004093] which belongs to the cache vm_area_struct of size 168 [ 29.005655] The buggy address is located 88 bytes inside of [ 29.005655] freed 168-byte region [ffff88800dc20e80, ffff88800dc20f28) [ 29.007145] [ 29.007376] The buggy address belongs to the physical page: [ 29.008071] page:00000000e3e37f6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc20 [ 29.009234] memcg:ffff88800ebdbc01 [ 29.009686] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.010385] page_type: 0xffffffff() [ 29.010869] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385340 dead000000000004 [ 29.011843] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebdbc01 [ 29.012810] page dumped because: kasan: bad access detected [ 29.013542] [ 29.013779] Memory state around the buggy address: [ 29.014419] ffff88800dc20d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.015363] ffff88800dc20e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.016316] >ffff88800dc20e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.017277] ^ [ 29.018081] ffff88800dc20f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.019025] ffff88800dc20f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.019962] ================================================================== [ 29.021131] Disabling lock debugging due to kernel taint [ 31.398543] BUG: Bad rss-counter state mm:000000003e32cfb6 type:MM_FILEPAGES val:33 [ 31.399526] BUG: Bad rss-counter state mm:000000003e32cfb6 type:MM_ANONPAGES val:22 [ 31.850332] BUG: Bad rss-counter state mm:000000009d628664 type:MM_FILEPAGES val:33 [ 31.851507] BUG: Bad rss-counter state mm:000000009d628664 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29061' (ECDSA) to the list of known hosts. 2023/06/20 15:46:09 fuzzer started 2023/06/20 15:46:09 dialing manager at localhost:36067 2023/06/20 15:46:09 checking machine... 2023/06/20 15:46:09 checking revisions... [ 32.533084] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:46:10 testing simple program... [ 32.583883] cgroup: Unknown subsys name 'net' [ 32.630484] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:46:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=1ffff11003324efd RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019927840 RSP=ffff888019927778 R8 =ffffffff86138eb4 R9 =ffff888019927828 R10=0000000000038001 R11=0000000000020d9c R12=ffff888019927848 R13=ffff888019927830 R14=ffff888019927b48 R15=ffff8880199277e8 RIP=ffffffff81131271 RFL=00000212 [----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 00007f2d7e751900 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=00007fffc5cc8000 CR3=000000000f060000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f803df502c0 CR3=000000000d7f8000 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=6372dfcc7a1e2a8bb74b180d67a74b6e XMM02=000000000011a3c0ec2efd57dc4c00df XMM03=0000000000120d080dabb4a4d9b201d1 XMM04=2f8b3d09e42e301900000000000ae988 XMM05=19e9129bd510f23500000000001313b8 XMM06=4fda316b135da52b0000000000131240 XMM07=e042d86d42eb936e0000000000120f88 XMM08=0dabb4a4d9b201d1000000000011a420 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000