syzkaller login: [ 30.723728] BUG: Bad rss-counter state mm:000000007bf4b76e type:MM_FILEPAGES val:33 [ 30.725141] BUG: Bad rss-counter state mm:000000007bf4b76e type:MM_ANONPAGES val:22 [ 30.882281] ================================================================== [ 30.883416] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.884357] Read of size 8 at addr ffff888018dcdc20 by task sshd/220 [ 30.885284] [ 30.885503] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.886363] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.887372] Call Trace: [ 30.887729] [ 30.888044] dump_stack_lvl+0x91/0xf0 [ 30.888602] print_report+0xcc/0x620 [ 30.889148] ? __virt_addr_valid+0x102/0x340 [ 30.889768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.890458] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.891149] kasan_report+0xbe/0xf0 [ 30.891710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.892404] vma_interval_tree_remove+0xc75/0xec0 [ 30.893079] vma_prepare+0xc54/0x11a0 [ 30.893622] __split_vma+0x5af/0x950 [ 30.894151] ? __pfx___split_vma+0x10/0x10 [ 30.894740] ? find_held_lock+0x2c/0x110 [ 30.895337] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.895973] ? lock_is_held_type+0x9f/0x120 [ 30.896568] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.897180] ? mtree_range_walk+0x632/0x900 [ 30.897742] ? mas_walk+0x5c7/0x7c0 [ 30.898223] do_vmi_munmap+0x1f1/0x2b0 [ 30.898718] mmap_region+0x1f9/0x2660 [ 30.899209] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.899724] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.900439] ? __pfx_lock_acquire+0x10/0x10 [ 30.900969] ? __pfx_mmap_region+0x10/0x10 [ 30.901501] ? security_mmap_addr+0x7d/0xa0 [ 30.902034] ? get_unmapped_area+0x1f5/0x3f0 [ 30.902584] do_mmap+0x854/0xf00 [ 30.903028] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.903539] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.904104] ksys_mmap_pgoff+0x3af/0x500 [ 30.904607] do_syscall_64+0x3f/0x90 [ 30.905096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.905747] RIP: 0033:0x7f535e1b0d82 [ 30.906207] 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 [ 30.908356] RSP: 002b:00007ffe941d4dc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.909264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f535e1b0d82 [ 30.910120] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f535d5ea000 [ 30.910976] RBP: 00007f535d5ea000 R08: 0000000000000009 R09: 0000000000001000 [ 30.911868] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab5b08dec0 [ 30.912717] R13: 00007ffe941d4de0 R14: 00007ffe941d4e10 R15: 00007ffe941d5170 [ 30.913599] [ 30.913892] [ 30.914109] Allocated by task 213: [ 30.914542] kasan_save_stack+0x22/0x50 [ 30.915045] kasan_set_track+0x25/0x30 [ 30.915549] __kasan_slab_alloc+0x59/0x70 [ 30.916070] kmem_cache_alloc+0x16b/0x370 [ 30.916589] vm_area_dup+0x20/0x160 [ 30.917050] __split_vma+0x170/0x950 [ 30.917519] split_vma+0xc6/0x110 [ 30.917963] mprotect_fixup+0x8d2/0xb30 [ 30.918470] do_mprotect_pkey+0x87e/0xd40 [ 30.918995] __x64_sys_mprotect+0x78/0xc0 [ 30.919525] do_syscall_64+0x3f/0x90 [ 30.920005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.920648] [ 30.920861] Freed by task 213: [ 30.921252] kasan_save_stack+0x22/0x50 [ 30.921748] kasan_set_track+0x25/0x30 [ 30.922252] kasan_save_free_info+0x2b/0x50 [ 30.922786] __kasan_slab_free+0x10a/0x190 [ 30.923334] kmem_cache_free+0x10d/0x4d0 [ 30.923862] rcu_core+0x8c8/0x2860 [ 30.924312] __do_softirq+0x1b7/0x7d4 [ 30.924799] [ 30.925015] Last potentially related work creation: [ 30.925672] kasan_save_stack+0x22/0x50 [ 30.926180] __kasan_record_aux_stack+0x8e/0xa0 [ 30.926757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.927422] remove_vma+0x139/0x170 [ 30.927876] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.928433] do_vmi_munmap+0x1f1/0x2b0 [ 30.928920] __vm_munmap+0x138/0x3a0 [ 30.929391] __x64_sys_munmap+0x59/0x80 [ 30.929890] do_syscall_64+0x3f/0x90 [ 30.930368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.931015] [ 30.931245] The buggy address belongs to the object at ffff888018dcdbc8 [ 30.931245] which belongs to the cache vm_area_struct of size 168 [ 30.932732] The buggy address is located 88 bytes inside of [ 30.932732] freed 168-byte region [ffff888018dcdbc8, ffff888018dcdc70) [ 30.934162] [ 30.934383] The buggy address belongs to the physical page: [ 30.935045] page:000000005af8f04c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18dcd [ 30.936158] memcg:ffff88800fb52001 [ 30.936597] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.937247] page_type: 0xffffffff() [ 30.937707] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.938635] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb52001 [ 30.939556] page dumped because: kasan: bad access detected [ 30.940225] [ 30.940446] Memory state around the buggy address: [ 30.941038] ffff888018dcdb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.941902] ffff888018dcdb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.942778] >ffff888018dcdc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.943658] ^ [ 30.944192] ffff888018dcdc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.945059] ffff888018dcdd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.945938] ================================================================== [ 30.946901] Disabling lock debugging due to kernel taint [ 33.343147] BUG: Bad rss-counter state mm:00000000d9c3e725 type:MM_FILEPAGES val:33 [ 33.344161] BUG: Bad rss-counter state mm:00000000d9c3e725 type:MM_ANONPAGES val:22 [ 33.885830] BUG: Bad rss-counter state mm:000000005d457801 type:MM_FILEPAGES val:33 [ 33.887136] BUG: Bad rss-counter state mm:000000005d457801 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45913' (ECDSA) to the list of known hosts. 2023/06/20 23:53:59 fuzzer started 2023/06/20 23:53:59 dialing manager at localhost:36067 2023/06/20 23:53:59 checking machine... 2023/06/20 23:53:59 checking revisions... [ 34.521687] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:53:59 testing simple program... [ 34.557924] cgroup: Unknown subsys name 'net' [ 34.601999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:53:58 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800b8c8b80 RCX=1ffff1100171924b RDX=1ffff110017191b6 RSI=0000000000000004 RDI=ffff88800b8c9258 RBP=1ffff11001fd5f76 RSP=ffff88800feafb38 R8 =0000000000000001 R9 =ffffed1001fd5f55 R10=0000000000000003 R11=0000000000000000 R12=ffff88800b8c8d98 R13=0000000000000000 R14=ffff88800b8c8000 R15=ffff88800b8c8b80 RIP=ffffffff8302b505 RFL=00000006 [-----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 0000000000000000 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=00007f9fec829640 CR3=000000000cb02000 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=2038353a33353a3332203032206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a343530303620 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a33353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fe451455000 RCX=ffffffff81007b82 RDX=ffff88800f6a1b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888018d07398 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fe451455000 R11=00000000000b6a61 R12=ffff888018d074e0 R13=0000000000000000 R14=ffff88800f6a1b40 R15=ffff888016af5600 RIP=ffffffff814c027c 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 00007fe450f62900 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=00007ffd0abdf000 CR3=000000000c824000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000