syzkaller login: [ 32.065371] BUG: Bad rss-counter state mm:00000000d4d654fe type:MM_FILEPAGES val:33 [ 32.066570] BUG: Bad rss-counter state mm:00000000d4d654fe type:MM_ANONPAGES val:22 [ 32.157772] ================================================================== [ 32.158849] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.159956] Read of size 8 at addr ffff8880096f3968 by task sshd/220 [ 32.161063] [ 32.161326] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.162357] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.163643] Call Trace: [ 32.164053] <TASK> [ 32.164433] dump_stack_lvl+0x91/0xf0 [ 32.165060] print_report+0xcc/0x620 [ 32.165668] ? __virt_addr_valid+0x102/0x340 [ 32.166362] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.167149] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.167950] kasan_report+0xbe/0xf0 [ 32.168579] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.169391] vma_interval_tree_remove+0xc75/0xec0 [ 32.170184] vma_prepare+0xc54/0x11a0 [ 32.170810] __split_vma+0x5af/0x950 [ 32.171417] ? __pfx___split_vma+0x10/0x10 [ 32.172115] ? find_held_lock+0x2c/0x110 [ 32.172821] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.173545] ? lock_is_held_type+0x9f/0x120 [ 32.174249] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.175033] ? mtree_range_walk+0x632/0x900 [ 32.175751] ? mas_walk+0x5c7/0x7c0 [ 32.176377] do_vmi_munmap+0x1f1/0x2b0 [ 32.177014] mmap_region+0x1f9/0x2660 [ 32.177642] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.178313] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.179237] ? __pfx_lock_acquire+0x10/0x10 [ 32.179914] ? __pfx_mmap_region+0x10/0x10 [ 32.180623] ? security_mmap_addr+0x7d/0xa0 [ 32.181308] ? get_unmapped_area+0x1f5/0x3f0 [ 32.182013] do_mmap+0x854/0xf00 [ 32.182582] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.183224] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.183952] ksys_mmap_pgoff+0x3af/0x500 [ 32.184628] do_syscall_64+0x3f/0x90 [ 32.185251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.186086] RIP: 0033:0x7f814e7aed82 [ 32.186671] 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 [ 32.189460] RSP: 002b:00007ffca7777d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.190638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f814e7aed82 [ 32.191721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f814dbe8000 [ 32.192852] RBP: 00007f814dbe8000 R08: 0000000000000009 R09: 0000000000001000 [ 32.193890] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e38643dec0 [ 32.194928] R13: 00007ffca7777d30 R14: 00007ffca7777d60 R15: 00007ffca77780c0 [ 32.195982] </TASK> [ 32.196377] [ 32.196641] Allocated by task 213: [ 32.197161] kasan_save_stack+0x22/0x50 [ 32.197778] kasan_set_track+0x25/0x30 [ 32.198382] __kasan_slab_alloc+0x59/0x70 [ 32.199020] kmem_cache_alloc+0x16b/0x370 [ 32.199649] vm_area_dup+0x20/0x160 [ 32.200214] __split_vma+0x170/0x950 [ 32.200792] split_vma+0xc6/0x110 [ 32.201412] mprotect_fixup+0x8d2/0xb30 [ 32.202027] do_mprotect_pkey+0x87e/0xd40 [ 32.202661] __x64_sys_mprotect+0x78/0xc0 [ 32.203299] do_syscall_64+0x3f/0x90 [ 32.203887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.204707] [ 32.204975] Freed by task 210: [ 32.205393] kasan_save_stack+0x22/0x50 [ 32.205895] kasan_set_track+0x25/0x30 [ 32.206383] kasan_save_free_info+0x2b/0x50 [ 32.206918] __kasan_slab_free+0x10a/0x190 [ 32.207456] kmem_cache_free+0x10d/0x4d0 [ 32.207966] rcu_core+0x8c8/0x2860 [ 32.208419] __do_softirq+0x1b7/0x7d4 [ 32.208902] [ 32.209118] Last potentially related work creation: [ 32.209704] kasan_save_stack+0x22/0x50 [ 32.210202] __kasan_record_aux_stack+0x8e/0xa0 [ 32.210778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.211417] remove_vma+0x139/0x170 [ 32.211868] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.212426] do_vmi_munmap+0x1f1/0x2b0 [ 32.212910] __vm_munmap+0x138/0x3a0 [ 32.213377] __x64_sys_munmap+0x59/0x80 [ 32.213873] do_syscall_64+0x3f/0x90 [ 32.214343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.214985] [ 32.215200] Second to last potentially related work creation: [ 32.215879] kasan_save_stack+0x22/0x50 [ 32.216402] __kasan_record_aux_stack+0x8e/0xa0 [ 32.216982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.217624] remove_vma+0x139/0x170 [ 32.218070] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.218631] do_vmi_munmap+0x1f1/0x2b0 [ 32.219111] __vm_munmap+0x138/0x3a0 [ 32.219573] __x64_sys_munmap+0x59/0x80 [ 32.220076] do_syscall_64+0x3f/0x90 [ 32.220556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.221199] [ 32.221416] The buggy address belongs to the object at ffff8880096f3910 [ 32.221416] which belongs to the cache vm_area_struct of size 168 [ 32.222868] The buggy address is located 88 bytes inside of [ 32.222868] freed 168-byte region [ffff8880096f3910, ffff8880096f39b8) [ 32.224289] [ 32.224506] The buggy address belongs to the physical page: [ 32.225162] page:0000000026329021 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96f3 [ 32.226229] memcg:ffff888014128501 [ 32.226658] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.227299] page_type: 0xffffffff() [ 32.227749] raw: 0100000000000200 ffff8880087a0c80 ffffea0000639800 dead000000000004 [ 32.228670] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014128501 [ 32.229571] page dumped because: kasan: bad access detected [ 32.230232] [ 32.230448] Memory state around the buggy address: [ 32.231027] ffff8880096f3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.231887] ffff8880096f3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.232760] >ffff8880096f3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.233603] ^ [ 32.234374] ffff8880096f3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.235227] ffff8880096f3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.236067] ================================================================== [ 32.237001] Disabling lock debugging due to kernel taint [ 34.827801] BUG: Bad rss-counter state mm:00000000f38471e3 type:MM_FILEPAGES val:33 [ 34.828708] BUG: Bad rss-counter state mm:00000000f38471e3 type:MM_ANONPAGES val:22 [ 35.354425] BUG: Bad rss-counter state mm:00000000239f6611 type:MM_FILEPAGES val:33 [ 35.355443] BUG: Bad rss-counter state mm:00000000239f6611 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64465' (ECDSA) to the list of known hosts. 2023/06/20 11:56:14 fuzzer started 2023/06/20 11:56:14 dialing manager at localhost:36067 2023/06/20 11:56:14 checking machine... 2023/06/20 11:56:14 checking revisions... [ 35.993151] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:56:14 testing simple program... [ 36.045966] cgroup: Unknown subsys name 'net' [ 36.087615] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:56:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=000055849e70efe0 CR3=0000000019cca000 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=2033313a36353a3131203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a36353a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000007 RCX=ffffffff813782c0 RDX=1ffff11001c7c9e0 RSI=0000000000000000 RDI=ffff88800e3e4f00 RBP=0000000000000008 RSP=ffff88806cf09e18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800e3e4ec0 R14=ffff88800e3e4e40 R15=dffffc0000000000 RIP=ffffffff81845e46 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 00007f5276a78900 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=00007f527702f618 CR3=000000001985e000 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=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