syzkaller login: [ 31.392642] BUG: Bad rss-counter state mm:00000000248ef2d1 type:MM_FILEPAGES val:33 [ 31.393884] BUG: Bad rss-counter state mm:00000000248ef2d1 type:MM_ANONPAGES val:22 [ 31.434040] ================================================================== [ 31.434953] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.436019] Read of size 8 at addr ffff88800ff0f058 by task sshd/220 [ 31.436804] [ 31.437024] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.437894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.438876] Call Trace: [ 31.439196] [ 31.439484] dump_stack_lvl+0x91/0xf0 [ 31.439986] print_report+0xcc/0x620 [ 31.440477] ? __virt_addr_valid+0x102/0x340 [ 31.441054] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.441673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.442294] kasan_report+0xbe/0xf0 [ 31.442772] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.443399] vma_interval_tree_remove+0xc75/0xec0 [ 31.443999] vma_prepare+0xc54/0x11a0 [ 31.444472] __split_vma+0x5af/0x950 [ 31.444954] ? __pfx___split_vma+0x10/0x10 [ 31.445482] ? find_held_lock+0x2c/0x110 [ 31.446000] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.446584] ? lock_is_held_type+0x9f/0x120 [ 31.447123] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.447729] ? mtree_range_walk+0x632/0x900 [ 31.448281] ? mas_walk+0x5c7/0x7c0 [ 31.448768] do_vmi_munmap+0x1f1/0x2b0 [ 31.449268] mmap_region+0x1f9/0x2660 [ 31.449747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.450255] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.450964] ? __pfx_lock_acquire+0x10/0x10 [ 31.451488] ? __pfx_mmap_region+0x10/0x10 [ 31.452010] ? security_mmap_addr+0x7d/0xa0 [ 31.452545] ? get_unmapped_area+0x1f5/0x3f0 [ 31.453106] do_mmap+0x854/0xf00 [ 31.453541] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.454035] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.454602] ksys_mmap_pgoff+0x3af/0x500 [ 31.455104] do_syscall_64+0x3f/0x90 [ 31.455592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.456248] RIP: 0033:0x7f953de7dd82 [ 31.456731] 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 [ 31.458859] RSP: 002b:00007ffcf873e998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.459755] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f953de7dd82 [ 31.460636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f953d2b7000 [ 31.461490] RBP: 00007f953d2b7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.462342] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f9b1c5b20 [ 31.463184] R13: 00007ffcf873e9b0 R14: 00007ffcf873e9e0 R15: 00007ffcf873ed40 [ 31.464029] [ 31.464317] [ 31.464540] Allocated by task 213: [ 31.464971] kasan_save_stack+0x22/0x50 [ 31.465471] kasan_set_track+0x25/0x30 [ 31.465965] __kasan_slab_alloc+0x59/0x70 [ 31.466488] kmem_cache_alloc+0x16b/0x370 [ 31.467006] vm_area_dup+0x20/0x160 [ 31.467461] __split_vma+0x170/0x950 [ 31.467922] split_vma+0xc6/0x110 [ 31.468354] mprotect_fixup+0x8d2/0xb30 [ 31.468878] do_mprotect_pkey+0x87e/0xd40 [ 31.469404] __x64_sys_mprotect+0x78/0xc0 [ 31.469925] do_syscall_64+0x3f/0x90 [ 31.470397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.471040] [ 31.471254] Freed by task 213: [ 31.471641] kasan_save_stack+0x22/0x50 [ 31.472140] kasan_set_track+0x25/0x30 [ 31.472640] kasan_save_free_info+0x2b/0x50 [ 31.473171] __kasan_slab_free+0x10a/0x190 [ 31.473706] kmem_cache_free+0x10d/0x4d0 [ 31.474223] rcu_core+0x8c8/0x2860 [ 31.474666] __do_softirq+0x1b7/0x7d4 [ 31.475146] [ 31.475358] Last potentially related work creation: [ 31.475941] kasan_save_stack+0x22/0x50 [ 31.476445] __kasan_record_aux_stack+0x8e/0xa0 [ 31.477018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.477663] remove_vma+0x139/0x170 [ 31.478118] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.478668] do_vmi_munmap+0x1f1/0x2b0 [ 31.479160] __vm_munmap+0x138/0x3a0 [ 31.479622] __x64_sys_munmap+0x59/0x80 [ 31.480110] do_syscall_64+0x3f/0x90 [ 31.480597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.481235] [ 31.481452] The buggy address belongs to the object at ffff88800ff0f000 [ 31.481452] which belongs to the cache vm_area_struct of size 168 [ 31.482910] The buggy address is located 88 bytes inside of [ 31.482910] freed 168-byte region [ffff88800ff0f000, ffff88800ff0f0a8) [ 31.484300] [ 31.484516] The buggy address belongs to the physical page: [ 31.485180] page:00000000521dd202 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff0f [ 31.486262] memcg:ffff88800ee35e01 [ 31.486686] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.487326] page_type: 0xffffffff() [ 31.487769] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.488687] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee35e01 [ 31.489582] page dumped because: kasan: bad access detected [ 31.490233] [ 31.490447] Memory state around the buggy address: [ 31.491019] ffff88800ff0ef00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.491878] ffff88800ff0ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.492748] >ffff88800ff0f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.493594] ^ [ 31.494313] ffff88800ff0f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.495155] ffff88800ff0f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.496002] ================================================================== [ 31.497100] Disabling lock debugging due to kernel taint [ 33.387687] BUG: Bad rss-counter state mm:00000000605644a4 type:MM_FILEPAGES val:33 [ 33.388848] BUG: Bad rss-counter state mm:00000000605644a4 type:MM_ANONPAGES val:22 [ 33.979840] BUG: Bad rss-counter state mm:00000000a5a34ae3 type:MM_FILEPAGES val:33 [ 33.981123] BUG: Bad rss-counter state mm:00000000a5a34ae3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39064' (ECDSA) to the list of known hosts. 2023/06/20 18:52:01 fuzzer started 2023/06/20 18:52:02 dialing manager at localhost:36067 2023/06/20 18:52:02 checking machine... 2023/06/20 18:52:02 checking revisions... [ 34.654650] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:52:02 testing simple program... [ 34.710832] cgroup: Unknown subsys name 'net' [ 34.771944] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:52:01 Registers: info registers vcpu 0 RAX=1ffff11001c89a85 RBX=ffff88800e44d3f8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e44d428 RBP=ffff888013a53600 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888013a4e000 R14=ffffffff8186b835 R15=ffff88800e039300 RIP=ffffffff818464ec 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 00007f97955eb900 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=00007f9794a22f70 CR3=0000000009810000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d9a45659af43f3b100000000000ae988 XMM05=d862a5646e85862f00000000001327f0 XMM06=f68340daaf33a7e60000000000131898 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019215608 RCX=ffffffff812e0135 RDX=1ffff110034497d5 RSI=ffffffff87b89f80 RDI=ffff88801a24beb8 RBP=ffff88801a24be40 RSP=ffff88801022fc78 R8 =0000000000000001 R9 =ffffed1002045f87 R10=0000000000000003 R11=00000000000b6a61 R12=0000000000000283 R13=ffff88801a24bea8 R14=0000000000000000 R15=ffffffff87b89f80 RIP=ffffffff844d2761 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 00007f3ed2140900 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=00007f3ed26f7618 CR3=000000001a394000 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=563412feff00545000000000000080fe 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