syzkaller login: [ 30.028961] BUG: Bad rss-counter state mm:0000000099632e5e type:MM_FILEPAGES val:33 [ 30.030513] BUG: Bad rss-counter state mm:0000000099632e5e type:MM_ANONPAGES val:22 [ 30.198237] ================================================================== [ 30.199371] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.200447] Read of size 8 at addr ffff8880145d16b0 by task sshd/220 [ 30.201234] [ 30.201452] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.202324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.203339] Call Trace: [ 30.203661] [ 30.203948] dump_stack_lvl+0x91/0xf0 [ 30.204440] print_report+0xcc/0x620 [ 30.204929] ? __virt_addr_valid+0x102/0x340 [ 30.205477] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.206088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.206702] kasan_report+0xbe/0xf0 [ 30.207187] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.207811] vma_interval_tree_remove+0xc75/0xec0 [ 30.208415] vma_prepare+0xc54/0x11a0 [ 30.208891] __split_vma+0x5af/0x950 [ 30.209360] ? __pfx___split_vma+0x10/0x10 [ 30.209890] ? find_held_lock+0x2c/0x110 [ 30.210407] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.210996] ? lock_is_held_type+0x9f/0x120 [ 30.211539] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.212153] ? mtree_range_walk+0x632/0x900 [ 30.212707] ? mas_walk+0x5c7/0x7c0 [ 30.213180] do_vmi_munmap+0x1f1/0x2b0 [ 30.213671] mmap_region+0x1f9/0x2660 [ 30.214155] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.214663] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.215389] ? __pfx_lock_acquire+0x10/0x10 [ 30.215925] ? __pfx_mmap_region+0x10/0x10 [ 30.216452] ? security_mmap_addr+0x7d/0xa0 [ 30.216978] ? get_unmapped_area+0x1f5/0x3f0 [ 30.217526] do_mmap+0x854/0xf00 [ 30.217974] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.218470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.219062] ksys_mmap_pgoff+0x3af/0x500 [ 30.219574] do_syscall_64+0x3f/0x90 [ 30.220051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.220698] RIP: 0033:0x7fd130a01d82 [ 30.221160] 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 [ 30.223319] RSP: 002b:00007fffbfb86f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.224223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd130a01d82 [ 30.225065] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd12fe3b000 [ 30.225925] RBP: 00007fd12fe3b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.226785] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b790c5fec0 [ 30.227636] R13: 00007fffbfb86f50 R14: 00007fffbfb86f80 R15: 00007fffbfb872e0 [ 30.228531] [ 30.228826] [ 30.229043] Allocated by task 213: [ 30.229491] kasan_save_stack+0x22/0x50 [ 30.230013] kasan_set_track+0x25/0x30 [ 30.230524] __kasan_slab_alloc+0x59/0x70 [ 30.231091] kmem_cache_alloc+0x16b/0x370 [ 30.231627] vm_area_dup+0x20/0x160 [ 30.232086] __split_vma+0x170/0x950 [ 30.232562] split_vma+0xc6/0x110 [ 30.233010] mprotect_fixup+0x8d2/0xb30 [ 30.233511] do_mprotect_pkey+0x87e/0xd40 [ 30.234044] __x64_sys_mprotect+0x78/0xc0 [ 30.234583] do_syscall_64+0x3f/0x90 [ 30.235067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.235716] [ 30.235937] Freed by task 213: [ 30.236336] kasan_save_stack+0x22/0x50 [ 30.236851] kasan_set_track+0x25/0x30 [ 30.237346] kasan_save_free_info+0x2b/0x50 [ 30.237876] __kasan_slab_free+0x10a/0x190 [ 30.238418] kmem_cache_free+0x10d/0x4d0 [ 30.238948] rcu_core+0x8c8/0x2860 [ 30.239394] __do_softirq+0x1b7/0x7d4 [ 30.239876] [ 30.240090] Last potentially related work creation: [ 30.240704] kasan_save_stack+0x22/0x50 [ 30.241215] __kasan_record_aux_stack+0x8e/0xa0 [ 30.241809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.242470] remove_vma+0x139/0x170 [ 30.242946] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.243518] do_vmi_munmap+0x1f1/0x2b0 [ 30.244020] __vm_munmap+0x138/0x3a0 [ 30.244493] __x64_sys_munmap+0x59/0x80 [ 30.244994] do_syscall_64+0x3f/0x90 [ 30.245485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.246138] [ 30.246357] The buggy address belongs to the object at ffff8880145d1658 [ 30.246357] which belongs to the cache vm_area_struct of size 168 [ 30.247867] The buggy address is located 88 bytes inside of [ 30.247867] freed 168-byte region [ffff8880145d1658, ffff8880145d1700) [ 30.249307] [ 30.249531] The buggy address belongs to the physical page: [ 30.250203] page:000000004810c173 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145d1 [ 30.251335] memcg:ffff88800fba1501 [ 30.251770] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.252425] page_type: 0xffffffff() [ 30.252888] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.253826] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fba1501 [ 30.254774] page dumped because: kasan: bad access detected [ 30.255441] [ 30.255660] Memory state around the buggy address: [ 30.256246] ffff8880145d1580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.257122] ffff8880145d1600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.257982] >ffff8880145d1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.258853] ^ [ 30.259476] ffff8880145d1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.260341] ffff8880145d1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.261220] ================================================================== [ 30.262545] Disabling lock debugging due to kernel taint [ 32.720651] BUG: Bad rss-counter state mm:000000002b8fb507 type:MM_FILEPAGES val:33 [ 32.721779] BUG: Bad rss-counter state mm:000000002b8fb507 type:MM_ANONPAGES val:22 [ 33.174646] BUG: Bad rss-counter state mm:00000000059d23c2 type:MM_FILEPAGES val:33 [ 33.175723] BUG: Bad rss-counter state mm:00000000059d23c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7775' (ECDSA) to the list of known hosts. 2023/06/20 17:27:05 fuzzer started 2023/06/20 17:27:06 dialing manager at localhost:36067 2023/06/20 17:27:06 checking machine... 2023/06/20 17:27:06 checking revisions... [ 33.927281] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:27:06 testing simple program... [ 33.973529] cgroup: Unknown subsys name 'net' [ 34.011857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:27:05 Registers: info registers vcpu 0 RAX=ffff88800d627f50 RBX=0000000000000001 RCX=ffffffff864bce2c RDX=0000000000000002 RSI=0000000000000000 RDI=ffff88800d6271f8 RBP=ffff88806ce09ab2 RSP=ffff88806ce09a00 R8 =ffffffff864bce30 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88800d6271d8 R13=ffff88806ce09ab8 R14=ffff88800d6271d8 R15=ffff88806ce09a70 RIP=ffffffff81131eec RFL=00000202 [-------] 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 00007f9f54566900 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=00007f2044388650 CR3=00000000145ac000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=984a3fa25bd4d9c900000000000ae988 XMM05=ddd9af30606aed510000000000132670 XMM06=4fda316b135da52b0000000000131460 XMM07=fb795ef6d657705600000000001217a8 XMM08=4f5453444600273d67736d000d0a0920 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=00007ffd1f73d708 CR3=0000000009088000 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=2035303a37323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a37323a3731203032 XMM08=755f6d65747379733d6a627573203539 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000