syzkaller login: [ 29.073533] BUG: Bad rss-counter state mm:00000000ada8c1a4 type:MM_FILEPAGES val:33 [ 29.074762] BUG: Bad rss-counter state mm:00000000ada8c1a4 type:MM_ANONPAGES val:22 [ 29.126297] ================================================================== [ 29.127291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.128421] Read of size 8 at addr ffff88800c5b1880 by task sshd/218 [ 29.129275] [ 29.129546] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.130496] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.131488] Call Trace: [ 29.131811] [ 29.132105] dump_stack_lvl+0x91/0xf0 [ 29.132593] print_report+0xcc/0x620 [ 29.133077] ? __virt_addr_valid+0x102/0x340 [ 29.133653] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.134273] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.134893] kasan_report+0xbe/0xf0 [ 29.135372] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.135998] vma_interval_tree_remove+0xc75/0xec0 [ 29.136597] vma_prepare+0xc54/0x11a0 [ 29.137075] __split_vma+0x5af/0x950 [ 29.137555] ? __pfx___split_vma+0x10/0x10 [ 29.138087] ? find_held_lock+0x2c/0x110 [ 29.138613] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.139173] ? lock_is_held_type+0x9f/0x120 [ 29.139709] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.140319] ? mtree_range_walk+0x632/0x900 [ 29.140864] ? mas_walk+0x5c7/0x7c0 [ 29.141363] do_vmi_munmap+0x1f1/0x2b0 [ 29.141863] mmap_region+0x1f9/0x2660 [ 29.142344] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.142853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.143573] ? __pfx_lock_acquire+0x10/0x10 [ 29.144154] ? __pfx_mmap_region+0x10/0x10 [ 29.144703] ? security_mmap_addr+0x7d/0xa0 [ 29.145243] ? get_unmapped_area+0x1f5/0x3f0 [ 29.145811] do_mmap+0x854/0xf00 [ 29.146262] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.146768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.147330] ksys_mmap_pgoff+0x3af/0x500 [ 29.147843] do_syscall_64+0x3f/0x90 [ 29.148328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.148985] RIP: 0033:0x7f650accfd82 [ 29.149467] 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 [ 29.151633] RSP: 002b:00007ffd23d8c638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.152552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f650accfd82 [ 29.153434] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f650a109000 [ 29.154288] RBP: 00007f650a109000 R08: 0000000000000009 R09: 0000000000001000 [ 29.155149] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647d9684ec0 [ 29.155996] R13: 00007ffd23d8c650 R14: 00007ffd23d8c680 R15: 00007ffd23d8c9e0 [ 29.156851] [ 29.157151] [ 29.157372] Allocated by task 211: [ 29.157801] kasan_save_stack+0x22/0x50 [ 29.158316] kasan_set_track+0x25/0x30 [ 29.158809] __kasan_slab_alloc+0x59/0x70 [ 29.159349] kmem_cache_alloc+0x16b/0x370 [ 29.159864] vm_area_dup+0x20/0x160 [ 29.160327] __split_vma+0x170/0x950 [ 29.160794] split_vma+0xc6/0x110 [ 29.161241] mprotect_fixup+0x8d2/0xb30 [ 29.161765] do_mprotect_pkey+0x87e/0xd40 [ 29.162301] __x64_sys_mprotect+0x78/0xc0 [ 29.162825] do_syscall_64+0x3f/0x90 [ 29.163302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.163949] [ 29.164163] Freed by task 211: [ 29.164555] kasan_save_stack+0x22/0x50 [ 29.165066] kasan_set_track+0x25/0x30 [ 29.165582] kasan_save_free_info+0x2b/0x50 [ 29.166121] __kasan_slab_free+0x10a/0x190 [ 29.166655] kmem_cache_free+0x10d/0x4d0 [ 29.167174] rcu_core+0x8c8/0x2860 [ 29.167620] __do_softirq+0x1b7/0x7d4 [ 29.168102] [ 29.168315] Last potentially related work creation: [ 29.168900] kasan_save_stack+0x22/0x50 [ 29.169425] __kasan_record_aux_stack+0x8e/0xa0 [ 29.170004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.170643] remove_vma+0x139/0x170 [ 29.171101] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.171658] do_vmi_munmap+0x1f1/0x2b0 [ 29.172150] __vm_munmap+0x138/0x3a0 [ 29.172615] __x64_sys_munmap+0x59/0x80 [ 29.173113] do_syscall_64+0x3f/0x90 [ 29.173597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.174244] [ 29.174466] The buggy address belongs to the object at ffff88800c5b1828 [ 29.174466] which belongs to the cache vm_area_struct of size 168 [ 29.175950] The buggy address is located 88 bytes inside of [ 29.175950] freed 168-byte region [ffff88800c5b1828, ffff88800c5b18d0) [ 29.177355] [ 29.177571] The buggy address belongs to the physical page: [ 29.178237] page:00000000e326dffc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5b1 [ 29.179332] memcg:ffff88800eb4cf01 [ 29.179764] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.180423] page_type: 0xffffffff() [ 29.180882] raw: 0100000000000200 ffff88800879fc80 ffffea000025c680 dead000000000008 [ 29.181815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb4cf01 [ 29.182733] page dumped because: kasan: bad access detected [ 29.183407] [ 29.183626] Memory state around the buggy address: [ 29.184208] ffff88800c5b1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.185074] ffff88800c5b1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.185954] >ffff88800c5b1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.186817] ^ [ 29.187235] ffff88800c5b1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.188103] ffff88800c5b1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.188962] ================================================================== [ 29.189975] Disabling lock debugging due to kernel taint [ 31.150387] BUG: Bad rss-counter state mm:000000002fbf4a11 type:MM_FILEPAGES val:33 [ 31.151161] BUG: Bad rss-counter state mm:000000002fbf4a11 type:MM_ANONPAGES val:22 [ 31.679950] BUG: Bad rss-counter state mm:00000000661ff550 type:MM_FILEPAGES val:33 [ 31.681235] BUG: Bad rss-counter state mm:00000000661ff550 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33181' (ECDSA) to the list of known hosts. 2023/06/19 13:31:41 fuzzer started 2023/06/19 13:31:41 dialing manager at localhost:44161 2023/06/19 13:31:41 checking machine... 2023/06/19 13:31:41 checking revisions... [ 32.383500] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:31:42 testing simple program... [ 32.436371] cgroup: Unknown subsys name 'net' [ 32.496648] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:31:41 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000006 RCX=0000000000000000 RDX=ffff88800e6351c0 RSI=ffffffff8113b049 RDI=ffff88800f300cd0 RBP=ffff88800f300cb0 RSP=ffff8880103afe90 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=00000000000000fb R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f66d93ef900 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=00007f66d8910000 CR3=000000000d65a000 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=00000000000aea28e3c4a46f281d3522 XMM01=00000000000aec68d3fdd5f48436fbd7 XMM02=00000000000f93f88cdec34d38af4c0a XMM03=00000000000f98b8693bd129e125714a XMM04=e3c4a46f281d352200000000000ae988 XMM05=4a5571d4bd4a154a0000000000135e70 XMM06=59d5b690e0af863b0000000000134d28 XMM07=fb795ef6d65770560000000000124a20 XMM08=2c67c8bc2e329bc3000000000011d858 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffeafe14cc8 CR3=0000000005482000 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=00007fd908632510000055bd2f8ef790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000