syzkaller login: [ 31.949268] BUG: Bad rss-counter state mm:00000000b4d9f5b6 type:MM_FILEPAGES val:33 [ 31.950576] BUG: Bad rss-counter state mm:00000000b4d9f5b6 type:MM_ANONPAGES val:22 [ 31.992236] ================================================================== [ 31.993253] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.994368] Read of size 8 at addr ffff88800cbee228 by task sshd/220 [ 31.995323] [ 31.995552] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.996562] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.997660] Call Trace: [ 31.998087] [ 31.998374] dump_stack_lvl+0x91/0xf0 [ 31.998970] print_report+0xcc/0x620 [ 31.999476] ? __virt_addr_valid+0x102/0x340 [ 32.000172] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.000838] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.001463] kasan_report+0xbe/0xf0 [ 32.001946] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.002574] vma_interval_tree_remove+0xc75/0xec0 [ 32.003187] vma_prepare+0xc54/0x11a0 [ 32.003690] __split_vma+0x5af/0x950 [ 32.004164] ? __pfx___split_vma+0x10/0x10 [ 32.004700] ? find_held_lock+0x2c/0x110 [ 32.005233] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.005809] ? lock_is_held_type+0x9f/0x120 [ 32.006362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.006978] ? mtree_range_walk+0x632/0x900 [ 32.007548] ? mas_walk+0x5c7/0x7c0 [ 32.008028] do_vmi_munmap+0x1f1/0x2b0 [ 32.008536] mmap_region+0x1f9/0x2660 [ 32.009040] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.009582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.010327] ? __pfx_lock_acquire+0x10/0x10 [ 32.010867] ? __pfx_mmap_region+0x10/0x10 [ 32.011420] ? security_mmap_addr+0x7d/0xa0 [ 32.011954] ? get_unmapped_area+0x1f5/0x3f0 [ 32.012507] do_mmap+0x854/0xf00 [ 32.012977] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.013501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.014076] ksys_mmap_pgoff+0x3af/0x500 [ 32.014586] do_syscall_64+0x3f/0x90 [ 32.015071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.015732] RIP: 0033:0x7fe019443d82 [ 32.016189] 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 [ 32.018343] RSP: 002b:00007ffc21cd7b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.019267] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe019443d82 [ 32.020129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe01887d000 [ 32.020982] RBP: 00007fe01887d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.021834] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c7b8082ec0 [ 32.022690] R13: 00007ffc21cd7b90 R14: 00007ffc21cd7bc0 R15: 00007ffc21cd7f20 [ 32.023577] [ 32.023867] [ 32.024083] Allocated by task 213: [ 32.024508] kasan_save_stack+0x22/0x50 [ 32.025009] kasan_set_track+0x25/0x30 [ 32.025504] __kasan_slab_alloc+0x59/0x70 [ 32.026027] kmem_cache_alloc+0x16b/0x370 [ 32.026540] vm_area_dup+0x20/0x160 [ 32.026994] __split_vma+0x170/0x950 [ 32.027467] split_vma+0xc6/0x110 [ 32.027916] mprotect_fixup+0x8d2/0xb30 [ 32.028429] do_mprotect_pkey+0x87e/0xd40 [ 32.028967] __x64_sys_mprotect+0x78/0xc0 [ 32.029543] do_syscall_64+0x3f/0x90 [ 32.030069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.030785] [ 32.031025] Freed by task 213: [ 32.031480] kasan_save_stack+0x22/0x50 [ 32.032042] kasan_set_track+0x25/0x30 [ 32.032593] kasan_save_free_info+0x2b/0x50 [ 32.033182] __kasan_slab_free+0x10a/0x190 [ 32.033840] kmem_cache_free+0x10d/0x4d0 [ 32.034408] rcu_core+0x8c8/0x2860 [ 32.034896] __do_softirq+0x1b7/0x7d4 [ 32.035437] [ 32.035677] Last potentially related work creation: [ 32.036329] kasan_save_stack+0x22/0x50 [ 32.036890] __kasan_record_aux_stack+0x8e/0xa0 [ 32.037533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.038213] remove_vma+0x139/0x170 [ 32.038678] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.039245] do_vmi_munmap+0x1f1/0x2b0 [ 32.039727] __vm_munmap+0x138/0x3a0 [ 32.040191] __x64_sys_munmap+0x59/0x80 [ 32.040687] do_syscall_64+0x3f/0x90 [ 32.041162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.041805] [ 32.042021] Second to last potentially related work creation: [ 32.042711] kasan_save_stack+0x22/0x50 [ 32.043234] __kasan_record_aux_stack+0x8e/0xa0 [ 32.043820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.044470] remove_vma+0x139/0x170 [ 32.044923] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.045490] do_vmi_munmap+0x1f1/0x2b0 [ 32.045980] mmap_region+0x1f9/0x2660 [ 32.046464] do_mmap+0x854/0xf00 [ 32.046901] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.047400] ksys_mmap_pgoff+0x3af/0x500 [ 32.047910] do_syscall_64+0x3f/0x90 [ 32.048391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.049036] [ 32.049258] The buggy address belongs to the object at ffff88800cbee1d0 [ 32.049258] which belongs to the cache vm_area_struct of size 168 [ 32.050735] The buggy address is located 88 bytes inside of [ 32.050735] freed 168-byte region [ffff88800cbee1d0, ffff88800cbee278) [ 32.052160] [ 32.052379] The buggy address belongs to the physical page: [ 32.053038] page:000000009a1d10ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbee [ 32.054132] memcg:ffff88800ef00001 [ 32.054554] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.055201] page_type: 0xffffffff() [ 32.055714] raw: 0100000000000200 ffff88800879fc80 ffffea000025d4c0 dead000000000002 [ 32.056662] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef00001 [ 32.057585] page dumped because: kasan: bad access detected [ 32.058271] [ 32.058494] Memory state around the buggy address: [ 32.059089] ffff88800cbee100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.059975] ffff88800cbee180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.060868] >ffff88800cbee200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.061732] ^ [ 32.062301] ffff88800cbee280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.063180] ffff88800cbee300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.064078] ================================================================== [ 32.065141] Disabling lock debugging due to kernel taint [ 34.799237] BUG: Bad rss-counter state mm:00000000b30ad564 type:MM_FILEPAGES val:33 [ 34.800567] BUG: Bad rss-counter state mm:00000000b30ad564 type:MM_ANONPAGES val:22 [ 35.293147] BUG: Bad rss-counter state mm:00000000e2e9d26f type:MM_FILEPAGES val:33 [ 35.294178] BUG: Bad rss-counter state mm:00000000e2e9d26f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45907' (ECDSA) to the list of known hosts. 2023/06/19 17:41:18 fuzzer started 2023/06/19 17:41:18 dialing manager at localhost:44161 2023/06/19 17:41:18 checking machine... 2023/06/19 17:41:18 checking revisions... [ 36.043815] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:41:18 testing simple program... [ 36.096328] cgroup: Unknown subsys name 'net' [ 36.136860] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:41:17 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000008 RCX=0000000000000000 RDX=1ffff11001182644 RSI=ffffffffffffffff RDI=ffff888008c13128 RBP=ffff888008c13220 RSP=ffff888015cffed8 R8 =0000000000000004 R9 =0000000000000040 R10=0000000000000008 R11=0000000000000000 R12=ffff888008c130c0 R13=ffff88800f252c80 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07eb RFL=00000282 [--S----] 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 00007fe4f4dc5900 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=0000558d11d88954 CR3=000000000c76c000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=ffff888008c58400 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=00007ff5413416c0 CR3=000000000982e000 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=db1aaab63e50adb6f7405cac8a31f992 XMM02=ec2efd57dc4c00df000000000011ffd8 XMM03=7a8830c0735882d600000000001200a8 XMM04=8af55eb2c057ffde00000000000ae988 XMM05=19e9129bd510f23500000000001355b8 XMM06=9bb6832acfa9e59c0000000000134420 XMM07=e042d86d42eb936e0000000000124990 XMM08=7a8830c0735882d600000000001200a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000