syzkaller login: [ 30.700872] BUG: Bad rss-counter state mm:0000000085983193 type:MM_FILEPAGES val:33 [ 30.702224] BUG: Bad rss-counter state mm:0000000085983193 type:MM_ANONPAGES val:22 [ 30.748284] ================================================================== [ 30.749496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.750589] Read of size 8 at addr ffff88800e6fc798 by task sshd/221 [ 30.751619] [ 30.752050] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.752930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.754127] Call Trace: [ 30.754445] [ 30.754750] dump_stack_lvl+0x91/0xf0 [ 30.755360] print_report+0xcc/0x620 [ 30.755850] ? __virt_addr_valid+0x102/0x340 [ 30.756471] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757168] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757886] kasan_report+0xbe/0xf0 [ 30.758363] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.758997] vma_interval_tree_remove+0xc75/0xec0 [ 30.759595] vma_prepare+0xc54/0x11a0 [ 30.760080] __split_vma+0x5af/0x950 [ 30.760545] ? __pfx___split_vma+0x10/0x10 [ 30.761069] ? find_held_lock+0x2c/0x110 [ 30.761589] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.762153] ? lock_is_held_type+0x9f/0x120 [ 30.762697] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.763339] ? mtree_range_walk+0x632/0x900 [ 30.763893] ? mas_walk+0x5c7/0x7c0 [ 30.764371] do_vmi_munmap+0x1f1/0x2b0 [ 30.764860] mmap_region+0x1f9/0x2660 [ 30.765334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.765843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.766549] ? __pfx_lock_acquire+0x10/0x10 [ 30.767108] ? __pfx_mmap_region+0x10/0x10 [ 30.767639] ? security_mmap_addr+0x7d/0xa0 [ 30.768166] ? get_unmapped_area+0x1f5/0x3f0 [ 30.768713] do_mmap+0x854/0xf00 [ 30.769150] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.769652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.770276] ksys_mmap_pgoff+0x3af/0x500 [ 30.770775] do_syscall_64+0x3f/0x90 [ 30.771288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771939] RIP: 0033:0x7eff78f86d82 [ 30.772392] 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 [ 30.774507] RSP: 002b:00007fff5b97ef78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.775448] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff78f86d82 [ 30.776293] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff783c0000 [ 30.777131] RBP: 00007eff783c0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.777981] R10: 0000000000000812 R11: 0000000000000206 R12: 00005585ff04eec0 [ 30.778817] R13: 00007fff5b97ef90 R14: 00007fff5b97efc0 R15: 00007fff5b97f320 [ 30.779714] [ 30.780006] [ 30.780220] Allocated by task 214: [ 30.780641] kasan_save_stack+0x22/0x50 [ 30.781142] kasan_set_track+0x25/0x30 [ 30.781631] __kasan_slab_alloc+0x59/0x70 [ 30.782147] kmem_cache_alloc+0x16b/0x370 [ 30.782655] vm_area_dup+0x20/0x160 [ 30.783180] __split_vma+0x170/0x950 [ 30.783642] split_vma+0xc6/0x110 [ 30.784082] mprotect_fixup+0x8d2/0xb30 [ 30.784582] do_mprotect_pkey+0x87e/0xd40 [ 30.785105] __x64_sys_mprotect+0x78/0xc0 [ 30.785623] do_syscall_64+0x3f/0x90 [ 30.786091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786728] [ 30.786988] Freed by task 214: [ 30.787376] kasan_save_stack+0x22/0x50 [ 30.787878] kasan_set_track+0x25/0x30 [ 30.788367] kasan_save_free_info+0x2b/0x50 [ 30.788898] __kasan_slab_free+0x10a/0x190 [ 30.789427] kmem_cache_free+0x10d/0x4d0 [ 30.789943] rcu_core+0x8c8/0x2860 [ 30.790385] __do_softirq+0x1b7/0x7d4 [ 30.790873] [ 30.791101] Last potentially related work creation: [ 30.791684] kasan_save_stack+0x22/0x50 [ 30.792182] __kasan_record_aux_stack+0x8e/0xa0 [ 30.792756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.793404] remove_vma+0x139/0x170 [ 30.793854] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.794406] do_vmi_munmap+0x1f1/0x2b0 [ 30.794922] __vm_munmap+0x138/0x3a0 [ 30.795387] __x64_sys_munmap+0x59/0x80 [ 30.795879] do_syscall_64+0x3f/0x90 [ 30.796355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796998] [ 30.797213] The buggy address belongs to the object at ffff88800e6fc740 [ 30.797213] which belongs to the cache vm_area_struct of size 168 [ 30.798684] The buggy address is located 88 bytes inside of [ 30.798684] freed 168-byte region [ffff88800e6fc740, ffff88800e6fc7e8) [ 30.800124] [ 30.800338] The buggy address belongs to the physical page: [ 30.800998] page:00000000fdd52a23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6fc [ 30.802070] memcg:ffff888014521001 [ 30.802495] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.803178] page_type: 0xffffffff() [ 30.803634] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.804556] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014521001 [ 30.805459] page dumped because: kasan: bad access detected [ 30.806116] [ 30.806331] Memory state around the buggy address: [ 30.806956] ffff88800e6fc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.807806] ffff88800e6fc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.808652] >ffff88800e6fc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.809498] ^ [ 30.809990] ffff88800e6fc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.810837] ffff88800e6fc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.811713] ================================================================== [ 30.812902] Disabling lock debugging due to kernel taint [ 33.499247] BUG: Bad rss-counter state mm:00000000d462132e type:MM_FILEPAGES val:33 [ 33.500285] BUG: Bad rss-counter state mm:00000000d462132e type:MM_ANONPAGES val:22 [ 33.987546] BUG: Bad rss-counter state mm:000000007956d139 type:MM_FILEPAGES val:33 [ 33.988724] BUG: Bad rss-counter state mm:000000007956d139 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53858' (ECDSA) to the list of known hosts. 2023/06/21 02:21:45 fuzzer started 2023/06/21 02:21:46 dialing manager at localhost:36067 2023/06/21 02:21:46 checking machine... 2023/06/21 02:21:46 checking revisions... [ 34.732995] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:21:46 testing simple program... [ 34.786739] cgroup: Unknown subsys name 'net' [ 34.836760] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:21:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffe8ffffc0f3e8 RCX=ffffffff8176f7c5 RDX=ffff888010311b40 RSI=000000000843f007 RDI=0000000000000000 RBP=000000000843f067 RSP=ffff8880103978c8 R8 =0000000000000001 R9 =ffffed1002072f0f R10=0000000000000003 R11=00000000000b6a61 R12=000000000843f007 R13=0000000000000282 R14=ffff88807ffd62c0 R15=ffff88806ce3a000 RIP=ffffffff814c0438 RFL=00000002 [-------] 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 00007fdb92f8f900 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=00007ffc73a26438 CR3=000000000beac000 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=00007ff2475e25100000556572b65790 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 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff110032d4f31 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880196a7970 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000040 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---ZAP-] 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 00007f697d122900 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=00007fff7934c000 CR3=000000000cf48000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000