syzkaller login: [ 24.172760] BUG: Bad rss-counter state mm:000000003aa51cd7 type:MM_FILEPAGES val:33 [ 24.174001] BUG: Bad rss-counter state mm:000000003aa51cd7 type:MM_ANONPAGES val:22 [ 24.211786] ================================================================== [ 24.212737] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.213681] Read of size 8 at addr ffff88800fd633f8 by task sshd/219 [ 24.214563] [ 24.214832] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.215731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.216899] Call Trace: [ 24.217240] <TASK> [ 24.217522] dump_stack_lvl+0x91/0xf0 [ 24.218006] print_report+0xcc/0x620 [ 24.218580] ? __virt_addr_valid+0x102/0x340 [ 24.219197] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.219891] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.220507] kasan_report+0xbe/0xf0 [ 24.220989] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.221614] vma_interval_tree_remove+0xc75/0xec0 [ 24.222212] vma_prepare+0xc54/0x11a0 [ 24.222693] __split_vma+0x5af/0x950 [ 24.223162] ? __pfx___split_vma+0x10/0x10 [ 24.223692] ? find_held_lock+0x2c/0x110 [ 24.224208] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.224778] ? lock_is_held_type+0x9f/0x120 [ 24.225331] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.225953] ? mtree_range_walk+0x632/0x900 [ 24.226501] ? mas_walk+0x5c7/0x7c0 [ 24.226975] do_vmi_munmap+0x1f1/0x2b0 [ 24.227472] mmap_region+0x1f9/0x2660 [ 24.227956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.228467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.229173] ? __pfx_lock_acquire+0x10/0x10 [ 24.229730] ? __pfx_mmap_region+0x10/0x10 [ 24.230269] ? security_mmap_addr+0x7d/0xa0 [ 24.230798] ? get_unmapped_area+0x1f5/0x3f0 [ 24.231353] do_mmap+0x854/0xf00 [ 24.231784] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.232280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.232849] ksys_mmap_pgoff+0x3af/0x500 [ 24.233363] do_syscall_64+0x3f/0x90 [ 24.233843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.234494] RIP: 0033:0x7fe749f7bd82 [ 24.234957] 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 [ 24.237102] RSP: 002b:00007ffd9c8b3f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.238014] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe749f7bd82 [ 24.238873] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7493b5000 [ 24.239720] RBP: 00007fe7493b5000 R08: 0000000000000009 R09: 0000000000001000 [ 24.240566] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac39720f70 [ 24.241441] R13: 00007ffd9c8b3fb0 R14: 00007ffd9c8b3fe0 R15: 00007ffd9c8b4340 [ 24.242308] </TASK> [ 24.242602] [ 24.242815] Allocated by task 212: [ 24.243238] kasan_save_stack+0x22/0x50 [ 24.243759] kasan_set_track+0x25/0x30 [ 24.244254] __kasan_slab_alloc+0x59/0x70 [ 24.244787] kmem_cache_alloc+0x16b/0x370 [ 24.245311] vm_area_dup+0x20/0x160 [ 24.245769] __split_vma+0x170/0x950 [ 24.246268] split_vma+0xc6/0x110 [ 24.246709] mprotect_fixup+0x8d2/0xb30 [ 24.247212] do_mprotect_pkey+0x87e/0xd40 [ 24.247733] __x64_sys_mprotect+0x78/0xc0 [ 24.248270] do_syscall_64+0x3f/0x90 [ 24.248746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.249414] [ 24.249628] Freed by task 210: [ 24.250043] kasan_save_stack+0x22/0x50 [ 24.250555] kasan_set_track+0x25/0x30 [ 24.251048] kasan_save_free_info+0x2b/0x50 [ 24.251606] __kasan_slab_free+0x10a/0x190 [ 24.252137] kmem_cache_free+0x10d/0x4d0 [ 24.252647] rcu_core+0x8c8/0x2860 [ 24.253093] __do_softirq+0x1b7/0x7d4 [ 24.253584] [ 24.253804] Last potentially related work creation: [ 24.254404] kasan_save_stack+0x22/0x50 [ 24.254913] __kasan_record_aux_stack+0x8e/0xa0 [ 24.255509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.256155] remove_vma+0x139/0x170 [ 24.256629] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.257182] do_vmi_munmap+0x1f1/0x2b0 [ 24.257690] __vm_munmap+0x138/0x3a0 [ 24.258160] __x64_sys_munmap+0x59/0x80 [ 24.258659] do_syscall_64+0x3f/0x90 [ 24.259134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.259783] [ 24.260002] The buggy address belongs to the object at ffff88800fd633a0 [ 24.260002] which belongs to the cache vm_area_struct of size 168 [ 24.261485] The buggy address is located 88 bytes inside of [ 24.261485] freed 168-byte region [ffff88800fd633a0, ffff88800fd63448) [ 24.262932] [ 24.263151] The buggy address belongs to the physical page: [ 24.263847] page:00000000dfcfbadb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd63 [ 24.264946] memcg:ffff88800f001e01 [ 24.265397] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.266094] page_type: 0xffffffff() [ 24.266552] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 24.267470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f001e01 [ 24.268378] page dumped because: kasan: bad access detected [ 24.269042] [ 24.269270] Memory state around the buggy address: [ 24.269874] ffff88800fd63280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.270738] ffff88800fd63300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.271607] >ffff88800fd63380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.272488] ^ [ 24.273342] ffff88800fd63400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.274200] ffff88800fd63480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.275064] ================================================================== [ 24.276089] Disabling lock debugging due to kernel taint [ 26.197768] BUG: Bad rss-counter state mm:00000000474503cd type:MM_FILEPAGES val:33 [ 26.199316] BUG: Bad rss-counter state mm:00000000474503cd type:MM_ANONPAGES val:22 [ 26.691485] BUG: Bad rss-counter state mm:000000003ef4b631 type:MM_FILEPAGES val:33 [ 26.692499] BUG: Bad rss-counter state mm:000000003ef4b631 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3767' (ECDSA) to the list of known hosts. 2023/06/20 07:59:14 fuzzer started 2023/06/20 07:59:14 dialing manager at localhost:44161 2023/06/20 07:59:14 checking machine... 2023/06/20 07:59:14 checking revisions... [ 27.373097] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:59:14 testing simple program... [ 27.427513] cgroup: Unknown subsys name 'net' [ 27.466432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:59:14 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11002cd3f24 RSI=ffffffff8180c585 RDI=ffff88801669f990 RBP=ffff88801669f960 RSP=ffff88801669f8c0 R8 =ffffffff8613751e R9 =ffff88801669f908 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801669f990 R13=0000000000000000 R14=ffff88801650d1c0 R15=0000000000092c40 RIP=ffffffff813ad42e 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 00007f9ccf100900 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=00007ffeaeada000 CR3=000000001ba7a000 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=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=0000000000000008 RDI=ffffffff87b69020 RBP=ffff888008e27dc8 RSP=ffff88806cf09df0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=000000124a0cc220 R12=0000000000000001 R13=ffff88806cf2c240 R14=ffff888008e27dc8 R15=dffffc0000000000 RIP=ffffffff8180fd24 RFL=00000056 [---ZAP-] 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 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=00007f94acda0020 CR3=000000000d582000 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=3e8d1e473796208ecb41088bc5ad2c0a XMM02=ec2efd57dc4c00df000000000011fd80 XMM03=e587436b0cb88a40000000000011fe50 XMM04=f80e2d2b5ff0b51400000000000ae988 XMM05=161b2208596933cd0000000000133e88 XMM06=806171799158d9670000000000133510 XMM07=e042d86d42eb936e0000000000123d38 XMM08=e587436b0cb88a40000000000011fe50 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000