syzkaller login: [ 30.560982] BUG: Bad rss-counter state mm:000000000be332a5 type:MM_FILEPAGES val:33 [ 30.561987] BUG: Bad rss-counter state mm:000000000be332a5 type:MM_ANONPAGES val:22 [ 30.726251] ================================================================== [ 30.727181] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.728148] Read of size 8 at addr ffff88800ca62228 by task sshd/220 [ 30.729014] [ 30.729230] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.730110] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.731071] Call Trace: [ 30.731404] <TASK> [ 30.731690] dump_stack_lvl+0x91/0xf0 [ 30.732197] print_report+0xcc/0x620 [ 30.732682] ? __virt_addr_valid+0x102/0x340 [ 30.733236] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.733857] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.734478] kasan_report+0xbe/0xf0 [ 30.734950] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.735571] vma_interval_tree_remove+0xc75/0xec0 [ 30.736207] vma_prepare+0xc54/0x11a0 [ 30.736702] __split_vma+0x5af/0x950 [ 30.737182] ? __pfx___split_vma+0x10/0x10 [ 30.737709] ? find_held_lock+0x2c/0x110 [ 30.738233] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.738804] ? lock_is_held_type+0x9f/0x120 [ 30.739344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.739969] ? mtree_range_walk+0x632/0x900 [ 30.740539] ? mas_walk+0x5c7/0x7c0 [ 30.741034] do_vmi_munmap+0x1f1/0x2b0 [ 30.741532] mmap_region+0x1f9/0x2660 [ 30.742017] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.742541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.743274] ? __pfx_lock_acquire+0x10/0x10 [ 30.743832] ? __pfx_mmap_region+0x10/0x10 [ 30.744373] ? security_mmap_addr+0x7d/0xa0 [ 30.744910] ? get_unmapped_area+0x1f5/0x3f0 [ 30.745462] do_mmap+0x854/0xf00 [ 30.745923] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.746423] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746999] ksys_mmap_pgoff+0x3af/0x500 [ 30.747518] do_syscall_64+0x3f/0x90 [ 30.748012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.748665] RIP: 0033:0x7f4cc5114d82 [ 30.749123] 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 [ 30.751288] RSP: 002b:00007ffd2943a388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.752213] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cc5114d82 [ 30.753057] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cc454e000 [ 30.753932] RBP: 00007f4cc454e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.754798] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644b2f6fec0 [ 30.755685] R13: 00007ffd2943a3a0 R14: 00007ffd2943a3d0 R15: 00007ffd2943a730 [ 30.756589] </TASK> [ 30.756886] [ 30.757104] Allocated by task 213: [ 30.757535] kasan_save_stack+0x22/0x50 [ 30.758042] kasan_set_track+0x25/0x30 [ 30.758539] __kasan_slab_alloc+0x59/0x70 [ 30.759067] kmem_cache_alloc+0x16b/0x370 [ 30.759600] vm_area_dup+0x20/0x160 [ 30.760073] __split_vma+0x170/0x950 [ 30.760551] split_vma+0xc6/0x110 [ 30.760992] mprotect_fixup+0x8d2/0xb30 [ 30.761497] do_mprotect_pkey+0x87e/0xd40 [ 30.762023] __x64_sys_mprotect+0x78/0xc0 [ 30.762557] do_syscall_64+0x3f/0x90 [ 30.763044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763688] [ 30.763911] Freed by task 213: [ 30.764304] kasan_save_stack+0x22/0x50 [ 30.764803] kasan_set_track+0x25/0x30 [ 30.765299] kasan_save_free_info+0x2b/0x50 [ 30.765841] __kasan_slab_free+0x10a/0x190 [ 30.766371] kmem_cache_free+0x10d/0x4d0 [ 30.766890] rcu_core+0x8c8/0x2860 [ 30.767333] __do_softirq+0x1b7/0x7d4 [ 30.767830] [ 30.768053] Last potentially related work creation: [ 30.768639] kasan_save_stack+0x22/0x50 [ 30.769147] __kasan_record_aux_stack+0x8e/0xa0 [ 30.769722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.770378] remove_vma+0x139/0x170 [ 30.770832] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.771390] do_vmi_munmap+0x1f1/0x2b0 [ 30.771898] __vm_munmap+0x138/0x3a0 [ 30.772368] __x64_sys_munmap+0x59/0x80 [ 30.772873] do_syscall_64+0x3f/0x90 [ 30.773347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.773989] [ 30.774206] Second to last potentially related work creation: [ 30.774879] kasan_save_stack+0x22/0x50 [ 30.775381] __kasan_record_aux_stack+0x8e/0xa0 [ 30.775974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.776621] remove_vma+0x139/0x170 [ 30.777076] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.777640] do_vmi_munmap+0x1f1/0x2b0 [ 30.778127] mmap_region+0x1f9/0x2660 [ 30.778606] do_mmap+0x854/0xf00 [ 30.779037] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.779533] ksys_mmap_pgoff+0x3af/0x500 [ 30.780052] do_syscall_64+0x3f/0x90 [ 30.780530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.781172] [ 30.781389] The buggy address belongs to the object at ffff88800ca621d0 [ 30.781389] which belongs to the cache vm_area_struct of size 168 [ 30.782864] The buggy address is located 88 bytes inside of [ 30.782864] freed 168-byte region [ffff88800ca621d0, ffff88800ca62278) [ 30.784269] [ 30.784487] The buggy address belongs to the physical page: [ 30.785158] page:00000000b7820b81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca62 [ 30.786239] memcg:ffff88800db1e001 [ 30.786671] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.787367] page_type: 0xffffffff() [ 30.787838] raw: 0100000000000200 ffff8880087a0c80 ffffea0000386c80 dead000000000003 [ 30.788759] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db1e001 [ 30.789684] page dumped because: kasan: bad access detected [ 30.790384] [ 30.790601] Memory state around the buggy address: [ 30.791182] ffff88800ca62100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.792050] ffff88800ca62180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.792907] >ffff88800ca62200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.793774] ^ [ 30.794333] ffff88800ca62280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.795194] ffff88800ca62300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.796052] ================================================================== [ 30.797024] Disabling lock debugging due to kernel taint [ 32.717416] BUG: Bad rss-counter state mm:00000000a7fcd55f type:MM_FILEPAGES val:33 [ 32.718584] BUG: Bad rss-counter state mm:00000000a7fcd55f type:MM_ANONPAGES val:22 [ 33.120246] BUG: Bad rss-counter state mm:00000000e68d4789 type:MM_FILEPAGES val:33 [ 33.121438] BUG: Bad rss-counter state mm:00000000e68d4789 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17297' (ECDSA) to the list of known hosts. 2023/06/20 12:14:47 fuzzer started 2023/06/20 12:14:47 dialing manager at localhost:36067 2023/06/20 12:14:47 checking machine... 2023/06/20 12:14:47 checking revisions... [ 33.839295] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:14:47 testing simple program... [ 33.889744] cgroup: Unknown subsys name 'net' [ 33.942395] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:14:47 Registers: info registers vcpu 0 RAX=ffff888009bab000 RBX=0000000000000053 RCX=ffff88800844f140 RDX=ffff888009ba8000 RSI=0000000000000053 RDI=0000000000000001 RBP=ffff888009bab053 RSP=ffff8880101d7870 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00676f6c2d766564 R12=ffff888009bab000 R13=0000000000000001 R14=0000000000000001 R15=ffffea000026ea00 RIP=ffffffff8180bb56 RFL=00000206 [-----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 00007f0dbfdde700 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=00007f875c930618 CR3=0000000019d46000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036343a3431 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383139 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffff88801bf25390 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88801bf25394 RBP=1ffff110011c6f87 RSP=ffff888008e37c30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=0000000000000202 R13=ffff88801bf253d0 R14=ffffffff813782f8 R15=ffff88800d90a480 RIP=ffffffff812e009a RFL=00000046 [---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 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=00007fcabe1a3fd0 CR3=0000000019fd0000 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=2036343a34313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a34313a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000