syzkaller login: [ 30.798072] BUG: Bad rss-counter state mm:00000000b7e5b2bb type:MM_FILEPAGES val:33 [ 30.799290] BUG: Bad rss-counter state mm:00000000b7e5b2bb type:MM_ANONPAGES val:22 [ 30.964754] ================================================================== [ 30.965947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.967085] Read of size 8 at addr ffff88800dd3cdf0 by task sshd/219 [ 30.968142] [ 30.968406] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.969488] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.970676] Call Trace: [ 30.971066] [ 30.971412] dump_stack_lvl+0x91/0xf0 [ 30.972011] print_report+0xcc/0x620 [ 30.972600] ? __virt_addr_valid+0x102/0x340 [ 30.973327] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.974087] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.974796] kasan_report+0xbe/0xf0 [ 30.975324] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.976020] vma_interval_tree_remove+0xc75/0xec0 [ 30.976696] vma_prepare+0xc54/0x11a0 [ 30.977265] __split_vma+0x5af/0x950 [ 30.977783] ? __pfx___split_vma+0x10/0x10 [ 30.978373] ? find_held_lock+0x2c/0x110 [ 30.978953] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.979584] ? lock_is_held_type+0x9f/0x120 [ 30.980194] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.980867] ? mtree_range_walk+0x632/0x900 [ 30.981500] ? mas_walk+0x5c7/0x7c0 [ 30.982026] do_vmi_munmap+0x1f1/0x2b0 [ 30.982568] mmap_region+0x1f9/0x2660 [ 30.983101] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.983664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.984454] ? __pfx_lock_acquire+0x10/0x10 [ 30.985042] ? __pfx_mmap_region+0x10/0x10 [ 30.985678] ? security_mmap_addr+0x7d/0xa0 [ 30.986268] ? get_unmapped_area+0x1f5/0x3f0 [ 30.986880] do_mmap+0x854/0xf00 [ 30.987367] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.987918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.988540] ksys_mmap_pgoff+0x3af/0x500 [ 30.989103] do_syscall_64+0x3f/0x90 [ 30.989662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.990386] RIP: 0033:0x7f349233ad82 [ 30.990895] 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 [ 30.993292] RSP: 002b:00007ffe53519868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.994301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f349233ad82 [ 30.995246] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3491774000 [ 30.996194] RBP: 00007f3491774000 R08: 0000000000000009 R09: 0000000000001000 [ 30.997140] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc652efd90 [ 30.998131] R13: 00007ffe53519880 R14: 00007ffe535198b0 R15: 00007ffe53519c10 [ 30.999095] [ 30.999423] [ 30.999660] Allocated by task 212: [ 31.000133] kasan_save_stack+0x22/0x50 [ 31.000693] kasan_set_track+0x25/0x30 [ 31.001269] __kasan_slab_alloc+0x59/0x70 [ 31.001852] kmem_cache_alloc+0x16b/0x370 [ 31.002430] vm_area_dup+0x20/0x160 [ 31.002933] __split_vma+0x170/0x950 [ 31.003449] split_vma+0xc6/0x110 [ 31.003938] mprotect_fixup+0x8d2/0xb30 [ 31.004497] do_mprotect_pkey+0x87e/0xd40 [ 31.005072] __x64_sys_mprotect+0x78/0xc0 [ 31.005684] do_syscall_64+0x3f/0x90 [ 31.006208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.006917] [ 31.007153] Freed by task 19: [ 31.007574] kasan_save_stack+0x22/0x50 [ 31.008135] kasan_set_track+0x25/0x30 [ 31.008683] kasan_save_free_info+0x2b/0x50 [ 31.009348] __kasan_slab_free+0x10a/0x190 [ 31.009941] kmem_cache_free+0x10d/0x4d0 [ 31.010509] rcu_core+0x8c8/0x2860 [ 31.011001] __do_softirq+0x1b7/0x7d4 [ 31.011529] [ 31.011762] Last potentially related work creation: [ 31.012412] kasan_save_stack+0x22/0x50 [ 31.012968] __kasan_record_aux_stack+0x8e/0xa0 [ 31.013646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.014362] remove_vma+0x139/0x170 [ 31.014862] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.015479] do_vmi_munmap+0x1f1/0x2b0 [ 31.016024] __vm_munmap+0x138/0x3a0 [ 31.016542] __x64_sys_munmap+0x59/0x80 [ 31.017097] do_syscall_64+0x3f/0x90 [ 31.017655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.018370] [ 31.018609] Second to last potentially related work creation: [ 31.019375] kasan_save_stack+0x22/0x50 [ 31.019939] __kasan_record_aux_stack+0x8e/0xa0 [ 31.020582] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.021323] remove_vma+0x139/0x170 [ 31.021824] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.022444] do_vmi_munmap+0x1f1/0x2b0 [ 31.022980] mmap_region+0x1f9/0x2660 [ 31.023510] do_mmap+0x854/0xf00 [ 31.023989] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.024534] ksys_mmap_pgoff+0x3af/0x500 [ 31.025099] do_syscall_64+0x3f/0x90 [ 31.025672] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.026397] [ 31.026638] The buggy address belongs to the object at ffff88800dd3cd98 [ 31.026638] which belongs to the cache vm_area_struct of size 168 [ 31.028277] The buggy address is located 88 bytes inside of [ 31.028277] freed 168-byte region [ffff88800dd3cd98, ffff88800dd3ce40) [ 31.029868] [ 31.030110] The buggy address belongs to the physical page: [ 31.030844] page:00000000c69fb037 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd3c [ 31.032053] memcg:ffff88800e9b6401 [ 31.032530] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.033399] page_type: 0xffffffff() [ 31.033920] raw: 0100000000000200 ffff8880087a0c80 ffffea00003264c0 dead000000000005 [ 31.035038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9b6401 [ 31.036165] page dumped because: kasan: bad access detected [ 31.036899] [ 31.037135] Memory state around the buggy address: [ 31.037862] ffff88800dd3cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.038914] ffff88800dd3cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.039983] >ffff88800dd3cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.040982] ^ [ 31.042038] ffff88800dd3ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.043160] ffff88800dd3ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.044174] ================================================================== [ 31.045272] Disabling lock debugging due to kernel taint [ 33.425416] BUG: Bad rss-counter state mm:000000003c569236 type:MM_FILEPAGES val:33 [ 33.426606] BUG: Bad rss-counter state mm:000000003c569236 type:MM_ANONPAGES val:22 [ 33.908133] BUG: Bad rss-counter state mm:00000000f1a69968 type:MM_FILEPAGES val:33 [ 33.909307] BUG: Bad rss-counter state mm:00000000f1a69968 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27999' (ECDSA) to the list of known hosts. 2023/06/21 08:46:46 fuzzer started 2023/06/21 08:46:46 dialing manager at localhost:36067 2023/06/21 08:46:46 checking machine... 2023/06/21 08:46:46 checking revisions... [ 34.456566] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:46:46 testing simple program... [ 34.488282] cgroup: Unknown subsys name 'net' [ 34.516113] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:46:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000607f92e16298 RCX=0000000000000000 RDX=ffff88801678d1c0 RSI=ffffffff8164d112 RDI=0000000000000007 RBP=ffff88800fc4e4c0 RSP=ffff88800f1cfa50 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800fc4e000 R15=0000000000000037 RIP=ffffffff814c089b 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 00007f175b387700 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=00007faf0ba200b0 CR3=000000000eb7a000 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=2035343a36343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 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=00007f3a4974d650 CR3=000000000cc14000 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=a46df0314c1f0cb7a3454a5572a3c45a XMM02=2c67c8bc2e329bc30000000000119d58 XMM03=fb795ef6d657705600000000001212d0 XMM04=af0f16b0bf36bfe300000000000ae988 XMM05=dfcdbad4f1609c3700000000001324a8 XMM06=c4253cf589ab5d030000000000131310 XMM07=e042d86d42eb936e0000000000121550 XMM08=d6c3f5ea18b09dec0000000000119db8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000