[ 31.803138] BUG: Bad rss-counter state mm:000000005688ae1f type:MM_FILEPAGES val:33 [ 31.804312] BUG: Bad rss-counter state mm:000000005688ae1f type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.847926] ================================================================== [ 31.849013] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.850098] Read of size 8 at addr ffff88800d7da5c8 by task sshd/219 [ 31.850933] [ 31.851150] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.852018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.853038] Call Trace: [ 31.853364] [ 31.853658] dump_stack_lvl+0x91/0xf0 [ 31.854160] print_report+0xcc/0x620 [ 31.854650] ? __virt_addr_valid+0x102/0x340 [ 31.855235] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.855860] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.856475] kasan_report+0xbe/0xf0 [ 31.856958] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.857575] vma_interval_tree_remove+0xc75/0xec0 [ 31.858171] vma_prepare+0xc54/0x11a0 [ 31.858654] __split_vma+0x5af/0x950 [ 31.859162] ? __pfx___split_vma+0x10/0x10 [ 31.859695] ? find_held_lock+0x2c/0x110 [ 31.860213] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.860788] ? lock_is_held_type+0x9f/0x120 [ 31.861330] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.861938] ? mtree_range_walk+0x632/0x900 [ 31.862497] ? mas_walk+0x5c7/0x7c0 [ 31.862980] do_vmi_munmap+0x1f1/0x2b0 [ 31.863477] mmap_region+0x1f9/0x2660 [ 31.863963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.864473] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.865185] ? __pfx_lock_acquire+0x10/0x10 [ 31.865720] ? __pfx_mmap_region+0x10/0x10 [ 31.866248] ? security_mmap_addr+0x7d/0xa0 [ 31.866776] ? get_unmapped_area+0x1f5/0x3f0 [ 31.867362] do_mmap+0x854/0xf00 [ 31.867803] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.868298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.868857] ksys_mmap_pgoff+0x3af/0x500 [ 31.869372] do_syscall_64+0x3f/0x90 [ 31.869849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.870499] RIP: 0033:0x7f375833fd82 [ 31.870967] 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 [ 31.873112] RSP: 002b:00007fff325f8fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.874023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f375833fd82 [ 31.874884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3757779000 [ 31.875735] RBP: 00007f3757779000 R08: 0000000000000009 R09: 0000000000001000 [ 31.876582] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b5e1fa980 [ 31.877425] R13: 00007fff325f8fe0 R14: 00007fff325f9010 R15: 00007fff325f9370 [ 31.878274] [ 31.878565] [ 31.878779] Allocated by task 212: [ 31.879241] kasan_save_stack+0x22/0x50 [ 31.879758] kasan_set_track+0x25/0x30 [ 31.880254] __kasan_slab_alloc+0x59/0x70 [ 31.880786] kmem_cache_alloc+0x16b/0x370 [ 31.881299] vm_area_dup+0x20/0x160 [ 31.881747] __split_vma+0x170/0x950 [ 31.882213] split_vma+0xc6/0x110 [ 31.882651] mprotect_fixup+0x8d2/0xb30 [ 31.883155] do_mprotect_pkey+0x87e/0xd40 [ 31.883680] __x64_sys_mprotect+0x78/0xc0 [ 31.884199] do_syscall_64+0x3f/0x90 [ 31.884669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.885307] [ 31.885523] Freed by task 212: [ 31.885920] kasan_save_stack+0x22/0x50 [ 31.886427] kasan_set_track+0x25/0x30 [ 31.886929] kasan_save_free_info+0x2b/0x50 [ 31.887461] __kasan_slab_free+0x10a/0x190 [ 31.887990] kmem_cache_free+0x10d/0x4d0 [ 31.888500] rcu_core+0x8c8/0x2860 [ 31.888939] __do_softirq+0x1b7/0x7d4 [ 31.889419] [ 31.889634] Last potentially related work creation: [ 31.890217] kasan_save_stack+0x22/0x50 [ 31.890717] __kasan_record_aux_stack+0x8e/0xa0 [ 31.891335] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.891974] remove_vma+0x139/0x170 [ 31.892431] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.893016] do_vmi_munmap+0x1f1/0x2b0 [ 31.893496] __vm_munmap+0x138/0x3a0 [ 31.893978] __x64_sys_munmap+0x59/0x80 [ 31.894477] do_syscall_64+0x3f/0x90 [ 31.894983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.895656] [ 31.895871] Second to last potentially related work creation: [ 31.896563] kasan_save_stack+0x22/0x50 [ 31.897064] __kasan_record_aux_stack+0x8e/0xa0 [ 31.897637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.898281] remove_vma+0x139/0x170 [ 31.898740] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.899325] do_vmi_munmap+0x1f1/0x2b0 [ 31.899816] mmap_region+0x1f9/0x2660 [ 31.900305] do_mmap+0x854/0xf00 [ 31.900754] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.901239] ksys_mmap_pgoff+0x7d/0x500 [ 31.901736] do_syscall_64+0x3f/0x90 [ 31.902215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902861] [ 31.903076] The buggy address belongs to the object at ffff88800d7da570 [ 31.903076] which belongs to the cache vm_area_struct of size 168 [ 31.904541] The buggy address is located 88 bytes inside of [ 31.904541] freed 168-byte region [ffff88800d7da570, ffff88800d7da618) [ 31.905955] [ 31.906171] The buggy address belongs to the physical page: [ 31.906830] page:00000000fccfd083 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7da [ 31.907913] memcg:ffff88800ef5e301 [ 31.908336] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.909041] page_type: 0xffffffff() [ 31.909493] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.910429] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef5e301 [ 31.911344] page dumped because: kasan: bad access detected [ 31.912000] [ 31.912218] Memory state around the buggy address: [ 31.912794] ffff88800d7da480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.913655] ffff88800d7da500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.914513] >ffff88800d7da580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.915365] ^ [ 31.916030] ffff88800d7da600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.916888] ffff88800d7da680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.917737] ================================================================== [ 31.918669] Disabling lock debugging due to kernel taint [ 34.075971] BUG: Bad rss-counter state mm:00000000ff8b5d74 type:MM_FILEPAGES val:33 [ 34.077574] BUG: Bad rss-counter state mm:00000000ff8b5d74 type:MM_ANONPAGES val:22 [ 34.628285] BUG: Bad rss-counter state mm:00000000fdc54bad type:MM_FILEPAGES val:33 [ 34.629454] BUG: Bad rss-counter state mm:00000000fdc54bad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16688' (ECDSA) to the list of known hosts. 2023/06/21 01:18:04 fuzzer started 2023/06/21 01:18:04 dialing manager at localhost:36067 2023/06/21 01:18:04 checking machine... 2023/06/21 01:18:04 checking revisions... [ 35.303105] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:18:04 testing simple program... [ 35.357541] cgroup: Unknown subsys name 'net' [ 35.394468] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:18:03 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce3a360 RCX=ffffffff813780e4 RDX=1ffff1100d9c747a RSI=ffff88806ce09ee8 RDI=ffff88806ce3a3d0 RBP=0000000000000200 RSP=ffff88806ce09e38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806ce35000 R13=ffff88806ce09ee8 R14=000000000000006f R15=ffff88806ce3a360 RIP=ffffffff81380b18 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 00007efcb61b3700 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=00007fb45e9fa650 CR3=000000001587a000 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=2033303a38313a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a38313a3130203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a6583c0 RCX=ffffffff8365ca00 RDX=1ffff110034cb093 RSI=0000000000000004 RDI=ffff88800b8c3210 RBP=ffff88800b8c3000 RSP=ffff88800fbff908 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00030009ff02000a R12=0000000000001100 R13=ffff88800b8c3210 R14=ffff88800fbffa88 R15=00000000000000a4 RIP=ffffffff8180fed8 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 00007fb45e445900 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=00007fb45e9fc618 CR3=00000000146b4000 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