syzkaller login: [ 45.767834] BUG: Bad rss-counter state mm:000000009724b1f5 type:MM_FILEPAGES val:33 [ 45.769070] BUG: Bad rss-counter state mm:000000009724b1f5 type:MM_ANONPAGES val:22 [ 45.807375] ================================================================== [ 45.808410] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.809534] Read of size 8 at addr ffff88800daf05c8 by task sshd/219 [ 45.810450] [ 45.810695] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.811826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.812914] Call Trace: [ 45.813327] [ 45.813617] dump_stack_lvl+0x91/0xf0 [ 45.814193] print_report+0xcc/0x620 [ 45.814747] ? __virt_addr_valid+0x102/0x340 [ 45.815400] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.816120] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.816800] kasan_report+0xbe/0xf0 [ 45.817373] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.818136] vma_interval_tree_remove+0xc75/0xec0 [ 45.818881] vma_prepare+0xc54/0x11a0 [ 45.819434] __split_vma+0x5af/0x950 [ 45.819948] ? __pfx___split_vma+0x10/0x10 [ 45.820687] ? find_held_lock+0x2c/0x110 [ 45.821245] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.821842] ? lock_is_held_type+0x9f/0x120 [ 45.822409] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.823054] ? mtree_range_walk+0x632/0x900 [ 45.823646] ? mas_walk+0x5c7/0x7c0 [ 45.824150] do_vmi_munmap+0x1f1/0x2b0 [ 45.824677] mmap_region+0x1f9/0x2660 [ 45.825180] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.825723] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.826490] ? __pfx_lock_acquire+0x10/0x10 [ 45.827056] ? __pfx_mmap_region+0x10/0x10 [ 45.827614] ? security_mmap_addr+0x7d/0xa0 [ 45.828185] ? get_unmapped_area+0x1f5/0x3f0 [ 45.828775] do_mmap+0x854/0xf00 [ 45.829241] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.829756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.830366] ksys_mmap_pgoff+0x3af/0x500 [ 45.830902] do_syscall_64+0x3f/0x90 [ 45.831405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.832092] RIP: 0033:0x7fa027ac0d82 [ 45.832597] 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 [ 45.834837] RSP: 002b:00007ffe29354178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.835791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa027ac0d82 [ 45.836712] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa026efa000 [ 45.837619] RBP: 00007fa026efa000 R08: 0000000000000009 R09: 0000000000001000 [ 45.838515] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555592cfbf70 [ 45.839415] R13: 00007ffe29354190 R14: 00007ffe293541c0 R15: 00007ffe29354520 [ 45.840347] [ 45.840663] [ 45.840893] Allocated by task 212: [ 45.841350] kasan_save_stack+0x22/0x50 [ 45.841891] kasan_set_track+0x25/0x30 [ 45.842419] __kasan_slab_alloc+0x59/0x70 [ 45.842965] kmem_cache_alloc+0x16b/0x370 [ 45.843506] vm_area_dup+0x20/0x160 [ 45.843989] __split_vma+0x170/0x950 [ 45.844508] split_vma+0xc6/0x110 [ 45.844984] mprotect_fixup+0x8d2/0xb30 [ 45.845511] do_mprotect_pkey+0x87e/0xd40 [ 45.846064] __x64_sys_mprotect+0x78/0xc0 [ 45.846621] do_syscall_64+0x3f/0x90 [ 45.847120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.847801] [ 45.848029] Freed by task 212: [ 45.848456] kasan_save_stack+0x22/0x50 [ 45.848996] kasan_set_track+0x25/0x30 [ 45.849516] kasan_save_free_info+0x2b/0x50 [ 45.850074] __kasan_slab_free+0x10a/0x190 [ 45.850637] kmem_cache_free+0x10d/0x4d0 [ 45.851175] rcu_core+0x8c8/0x2860 [ 45.851640] __do_softirq+0x1b7/0x7d4 [ 45.852230] [ 45.852478] Last potentially related work creation: [ 45.853191] kasan_save_stack+0x22/0x50 [ 45.853731] __kasan_record_aux_stack+0x8e/0xa0 [ 45.854327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.855015] remove_vma+0x139/0x170 [ 45.855494] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.856092] do_vmi_munmap+0x1f1/0x2b0 [ 45.856623] __vm_munmap+0x138/0x3a0 [ 45.857123] __x64_sys_munmap+0x59/0x80 [ 45.857644] do_syscall_64+0x3f/0x90 [ 45.858139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.858826] [ 45.859060] The buggy address belongs to the object at ffff88800daf0570 [ 45.859060] which belongs to the cache vm_area_struct of size 168 [ 45.860630] The buggy address is located 88 bytes inside of [ 45.860630] freed 168-byte region [ffff88800daf0570, ffff88800daf0618) [ 45.862140] [ 45.862371] The buggy address belongs to the physical page: [ 45.863066] page:0000000074bebee5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaf0 [ 45.864243] memcg:ffff888009886001 [ 45.864702] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.865450] page_type: 0xffffffff() [ 45.865933] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 45.866906] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009886001 [ 45.867876] page dumped because: kasan: bad access detected [ 45.868592] [ 45.868820] Memory state around the buggy address: [ 45.869441] ffff88800daf0480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.870375] ffff88800daf0500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 45.871308] >ffff88800daf0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.872241] ^ [ 45.872976] ffff88800daf0600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 45.873912] ffff88800daf0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.874852] ================================================================== [ 45.875865] Disabling lock debugging due to kernel taint [ 48.399805] BUG: Bad rss-counter state mm:000000000f2241b0 type:MM_FILEPAGES val:33 [ 48.400800] BUG: Bad rss-counter state mm:000000000f2241b0 type:MM_ANONPAGES val:22 [ 48.784650] BUG: Bad rss-counter state mm:000000000da1a9b7 type:MM_FILEPAGES val:33 [ 48.786312] BUG: Bad rss-counter state mm:000000000da1a9b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36762' (ECDSA) to the list of known hosts. 2023/06/19 23:30:28 fuzzer started 2023/06/19 23:30:28 dialing manager at localhost:44161 2023/06/19 23:30:28 checking machine... 2023/06/19 23:30:28 checking revisions... [ 49.521185] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:30:28 testing simple program... [ 49.564306] cgroup: Unknown subsys name 'net' [ 49.613485] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:30:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f650b9084a0 RCX=00007f650b8363f5 RDX=00007ffd50488de0 RSI=00007ffd50488de0 RDI=0000000000000008 RBP=000055f9344ebd00 RSP=00007ffd50488de0 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000246 R12=00007f650b354900 R13=00007ffd50488f78 R14=0000000000000000 R15=0000000000000000 RIP=00007f650b7bc10f RFL=00000207 [-----PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f650b354900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd50483000 CR3=000000000eddc000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f6d057224c0 CR3=000000000f364000 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=2037323a30333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a30333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000