syzkaller login: [ 38.815168] BUG: Bad rss-counter state mm:0000000009de7245 type:MM_FILEPAGES val:33 [ 38.816607] BUG: Bad rss-counter state mm:0000000009de7245 type:MM_ANONPAGES val:22 [ 38.980646] ================================================================== [ 38.981562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.982442] Read of size 8 at addr ffff88800e385140 by task sshd/220 [ 38.983165] [ 38.983372] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.984363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.985336] Call Trace: [ 38.985658] [ 38.985985] dump_stack_lvl+0x91/0xf0 [ 38.986474] print_report+0xcc/0x620 [ 38.986958] ? __virt_addr_valid+0x102/0x340 [ 38.987516] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.988151] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.988773] kasan_report+0xbe/0xf0 [ 38.989242] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.989861] vma_interval_tree_remove+0xc75/0xec0 [ 38.990456] vma_prepare+0xc54/0x11a0 [ 38.990936] __split_vma+0x5af/0x950 [ 38.991419] ? __pfx___split_vma+0x10/0x10 [ 38.991956] ? find_held_lock+0x2c/0x110 [ 38.992481] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.993051] ? lock_is_held_type+0x9f/0x120 [ 38.993569] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.994146] ? mtree_range_walk+0x632/0x900 [ 38.994694] ? mas_walk+0x5c7/0x7c0 [ 38.995178] do_vmi_munmap+0x1f1/0x2b0 [ 38.995672] mmap_region+0x1f9/0x2660 [ 38.996169] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.996683] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.997399] ? __pfx_lock_acquire+0x10/0x10 [ 38.997914] ? __pfx_mmap_region+0x10/0x10 [ 38.998425] ? security_mmap_addr+0x7d/0xa0 [ 38.998926] ? get_unmapped_area+0x1f5/0x3f0 [ 38.999453] do_mmap+0x854/0xf00 [ 38.999871] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.000347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.000884] ksys_mmap_pgoff+0x3af/0x500 [ 39.001366] do_syscall_64+0x3f/0x90 [ 39.001821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.002430] RIP: 0033:0x7f5a84726d82 [ 39.002861] 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 [ 39.004866] RSP: 002b:00007fff0133c6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.005719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5a84726d82 [ 39.006529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5a83b60000 [ 39.007361] RBP: 00007f5a83b60000 R08: 0000000000000009 R09: 0000000000001000 [ 39.008204] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c8f130dec0 [ 39.009034] R13: 00007fff0133c700 R14: 00007fff0133c730 R15: 00007fff0133ca90 [ 39.009848] [ 39.010132] [ 39.010335] Allocated by task 213: [ 39.010740] kasan_save_stack+0x22/0x50 [ 39.011218] kasan_set_track+0x25/0x30 [ 39.011681] __kasan_slab_alloc+0x59/0x70 [ 39.012239] kmem_cache_alloc+0x16b/0x370 [ 39.012760] vm_area_dup+0x20/0x160 [ 39.013231] __split_vma+0x170/0x950 [ 39.013693] split_vma+0xc6/0x110 [ 39.014147] mprotect_fixup+0x8d2/0xb30 [ 39.014653] do_mprotect_pkey+0x87e/0xd40 [ 39.015176] __x64_sys_mprotect+0x78/0xc0 [ 39.015701] do_syscall_64+0x3f/0x90 [ 39.016206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.016855] [ 39.017080] Freed by task 213: [ 39.017485] kasan_save_stack+0x22/0x50 [ 39.017992] kasan_set_track+0x25/0x30 [ 39.018496] kasan_save_free_info+0x2b/0x50 [ 39.019036] __kasan_slab_free+0x10a/0x190 [ 39.019572] kmem_cache_free+0x10d/0x4d0 [ 39.020084] rcu_core+0x8c8/0x2860 [ 39.020547] __do_softirq+0x1b7/0x7d4 [ 39.021024] [ 39.021242] Last potentially related work creation: [ 39.021833] kasan_save_stack+0x22/0x50 [ 39.022349] __kasan_record_aux_stack+0x8e/0xa0 [ 39.022925] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.023572] remove_vma+0x139/0x170 [ 39.024025] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.024601] do_vmi_munmap+0x1f1/0x2b0 [ 39.025176] __vm_munmap+0x138/0x3a0 [ 39.025645] __x64_sys_munmap+0x59/0x80 [ 39.026143] do_syscall_64+0x3f/0x90 [ 39.026624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.027272] [ 39.027490] Second to last potentially related work creation: [ 39.028192] kasan_save_stack+0x22/0x50 [ 39.028701] __kasan_record_aux_stack+0x8e/0xa0 [ 39.029276] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.029925] remove_vma+0x139/0x170 [ 39.030383] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.030943] do_vmi_munmap+0x1f1/0x2b0 [ 39.031432] mmap_region+0x1f9/0x2660 [ 39.031919] do_mmap+0x854/0xf00 [ 39.032373] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.032871] ksys_mmap_pgoff+0x3af/0x500 [ 39.033379] do_syscall_64+0x3f/0x90 [ 39.033866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.034517] [ 39.034738] The buggy address belongs to the object at ffff88800e3850e8 [ 39.034738] which belongs to the cache vm_area_struct of size 168 [ 39.036239] The buggy address is located 88 bytes inside of [ 39.036239] freed 168-byte region [ffff88800e3850e8, ffff88800e385190) [ 39.037670] [ 39.037886] The buggy address belongs to the physical page: [ 39.038559] page:000000006b72bfef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe385 [ 39.039661] memcg:ffff88800dee0001 [ 39.040090] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.040766] page_type: 0xffffffff() [ 39.041226] raw: 0100000000000200 ffff88800879fc80 ffffea000038f500 dead000000000002 [ 39.042158] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dee0001 [ 39.043068] page dumped because: kasan: bad access detected [ 39.043733] [ 39.043946] Memory state around the buggy address: [ 39.044543] ffff88800e385000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.045403] ffff88800e385080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.046273] >ffff88800e385100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.047134] ^ [ 39.047779] ffff88800e385180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 39.048650] ffff88800e385200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.049513] ================================================================== [ 39.050513] Disabling lock debugging due to kernel taint [ 41.265608] BUG: Bad rss-counter state mm:00000000914655b9 type:MM_FILEPAGES val:33 [ 41.267018] BUG: Bad rss-counter state mm:00000000914655b9 type:MM_ANONPAGES val:22 [ 41.758475] BUG: Bad rss-counter state mm:0000000011e3e9e8 type:MM_FILEPAGES val:33 [ 41.759475] BUG: Bad rss-counter state mm:0000000011e3e9e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19091' (ECDSA) to the list of known hosts. 2023/06/20 06:44:39 fuzzer started 2023/06/20 06:44:40 dialing manager at localhost:44161 2023/06/20 06:44:40 checking machine... 2023/06/20 06:44:40 checking revisions... [ 42.460839] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:44:40 testing simple program... [ 42.504884] cgroup: Unknown subsys name 'net' [ 42.553485] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:44:31 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000008 RCX=0000000000000014 RDX=0000000064914ad7 RSI=00000000000000e5 RDI=ffff88801ce5d140 RBP=0000000000000018 RSP=ffff888014697388 R8 =0000000000000008 R9 =0000000000000002 R10=0000000000000ec0 R11=00000000000b6996 R12=ffff88801ce5d140 R13=00000000000000e5 R14=0000000000000002 R15=0000000000000014 RIP=ffffffff814c07eb RFL=00000286 [--S--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 00007f73b07a3900 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=00007f73b0d5a618 CR3=000000000dab6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=00007f73b0d5b0b0 CR3=000000000e4fa000 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=2039333a34343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a34343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000