syzkaller login: [ 31.692581] BUG: Bad rss-counter state mm:00000000aaff7685 type:MM_FILEPAGES val:33 [ 31.693654] BUG: Bad rss-counter state mm:00000000aaff7685 type:MM_ANONPAGES val:22 [ 31.732994] ================================================================== [ 31.734028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.735034] Read of size 8 at addr ffff88800e50a3f8 by task sshd/221 [ 31.735794] [ 31.736010] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.736874] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.737886] Call Trace: [ 31.738202] [ 31.738484] dump_stack_lvl+0x91/0xf0 [ 31.738970] print_report+0xcc/0x620 [ 31.739455] ? __virt_addr_valid+0x102/0x340 [ 31.740004] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.740620] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.741232] kasan_report+0xbe/0xf0 [ 31.741718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.742336] vma_interval_tree_remove+0xc75/0xec0 [ 31.742941] vma_prepare+0xc54/0x11a0 [ 31.743419] __split_vma+0x5af/0x950 [ 31.743892] ? __pfx___split_vma+0x10/0x10 [ 31.744420] ? find_held_lock+0x2c/0x110 [ 31.744939] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.745522] ? lock_is_held_type+0x9f/0x120 [ 31.746062] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.746676] ? mtree_range_walk+0x632/0x900 [ 31.747224] ? mas_walk+0x5c7/0x7c0 [ 31.747694] do_vmi_munmap+0x1f1/0x2b0 [ 31.748198] mmap_region+0x1f9/0x2660 [ 31.748687] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.749194] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.749922] ? __pfx_lock_acquire+0x10/0x10 [ 31.750455] ? __pfx_mmap_region+0x10/0x10 [ 31.750993] ? security_mmap_addr+0x7d/0xa0 [ 31.751524] ? get_unmapped_area+0x1f5/0x3f0 [ 31.752077] do_mmap+0x854/0xf00 [ 31.752517] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.753012] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.753583] ksys_mmap_pgoff+0x3af/0x500 [ 31.754088] do_syscall_64+0x3f/0x90 [ 31.754562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755211] RIP: 0033:0x7ff74858ed82 [ 31.755675] 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 [ 31.757822] RSP: 002b:00007ffece12c438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.758723] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff74858ed82 [ 31.759564] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7479c8000 [ 31.760403] RBP: 00007ff7479c8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.761242] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0ec1d4b20 [ 31.762103] R13: 00007ffece12c450 R14: 00007ffece12c480 R15: 00007ffece12c7e0 [ 31.762955] [ 31.763249] [ 31.763464] Allocated by task 214: [ 31.763893] kasan_save_stack+0x22/0x50 [ 31.764393] kasan_set_track+0x25/0x30 [ 31.764899] __kasan_slab_alloc+0x59/0x70 [ 31.765437] kmem_cache_alloc+0x16b/0x370 [ 31.765955] vm_area_dup+0x20/0x160 [ 31.766412] __split_vma+0x170/0x950 [ 31.766878] split_vma+0xc6/0x110 [ 31.767327] mprotect_fixup+0x8d2/0xb30 [ 31.767831] do_mprotect_pkey+0x87e/0xd40 [ 31.768354] __x64_sys_mprotect+0x78/0xc0 [ 31.768878] do_syscall_64+0x3f/0x90 [ 31.769354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.769997] [ 31.770215] Freed by task 214: [ 31.770606] kasan_save_stack+0x22/0x50 [ 31.771104] kasan_set_track+0x25/0x30 [ 31.771593] kasan_save_free_info+0x2b/0x50 [ 31.772126] __kasan_slab_free+0x10a/0x190 [ 31.772665] kmem_cache_free+0x10d/0x4d0 [ 31.773177] rcu_core+0x8c8/0x2860 [ 31.773685] __do_softirq+0x1b7/0x7d4 [ 31.774223] [ 31.774472] Last potentially related work creation: [ 31.775135] kasan_save_stack+0x22/0x50 [ 31.775720] __kasan_record_aux_stack+0x8e/0xa0 [ 31.776373] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.777111] remove_vma+0x139/0x170 [ 31.777636] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.778269] do_vmi_munmap+0x1f1/0x2b0 [ 31.778830] __vm_munmap+0x138/0x3a0 [ 31.779370] __x64_sys_munmap+0x59/0x80 [ 31.779940] do_syscall_64+0x3f/0x90 [ 31.780484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.781219] [ 31.781469] The buggy address belongs to the object at ffff88800e50a3a0 [ 31.781469] which belongs to the cache vm_area_struct of size 168 [ 31.783051] The buggy address is located 88 bytes inside of [ 31.783051] freed 168-byte region [ffff88800e50a3a0, ffff88800e50a448) [ 31.784472] [ 31.784687] The buggy address belongs to the physical page: [ 31.785356] page:0000000097caf7f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe50a [ 31.786445] memcg:ffff88800d60f801 [ 31.786874] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.787524] page_type: 0xffffffff() [ 31.787977] raw: 0100000000000200 ffff88800879fc80 ffffea000037ee80 dead000000000008 [ 31.788890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d60f801 [ 31.789815] page dumped because: kasan: bad access detected [ 31.790475] [ 31.790692] Memory state around the buggy address: [ 31.791273] ffff88800e50a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.792142] ffff88800e50a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.792991] >ffff88800e50a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.793848] ^ [ 31.794688] ffff88800e50a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.795540] ffff88800e50a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.796390] ================================================================== [ 31.797463] Disabling lock debugging due to kernel taint [ 33.937715] BUG: Bad rss-counter state mm:00000000c2323922 type:MM_FILEPAGES val:33 [ 33.938807] BUG: Bad rss-counter state mm:00000000c2323922 type:MM_ANONPAGES val:22 [ 34.431426] BUG: Bad rss-counter state mm:00000000a0fdb46f type:MM_FILEPAGES val:33 [ 34.432632] BUG: Bad rss-counter state mm:00000000a0fdb46f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18720' (ECDSA) to the list of known hosts. 2023/06/19 21:29:18 fuzzer started 2023/06/19 21:29:19 dialing manager at localhost:44161 2023/06/19 21:29:19 checking machine... 2023/06/19 21:29:19 checking revisions... [ 35.144211] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:29:19 testing simple program... [ 35.197462] cgroup: Unknown subsys name 'net' [ 35.242637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:29:18 Registers: info registers vcpu 0 RAX=66e6183c0567d200 RBX=00007f1c3389aa84 RCX=00007f1c3389aa84 RDX=00007f1c3389aa84 RSI=ffffffffffffffff RDI=0000000000000001 RBP=00007ffe1d47fa00 RSP=00007ffe1d47f900 R8 =000055e041ab8ce0 R9 =0000000000000005 R10=000055e041adb1e0 R11=0000000000000000 R12=000055e041ac9740 R13=000055e041ab8ce0 R14=00007f1c32d6b6f8 R15=000055e041adb1e0 RIP=00007f1c3326ab25 RFL=00000246 [---Z-P-] 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 00007f1c32d6b900 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=00007f1c333230b0 CR3=0000000009742000 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=707465675f6c697475646f6d6d61705f XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7465675f6c697475646f6d6d61705f00 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=0000000000000001 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=00007fe96a24faa0 CR3=000000000db74000 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=06727dcb15ecba9565498712fb5211d1 XMM02=000000000011f200ec2efd57dc4c00df XMM03=00000000001239a0e8abfdf62e1dae8e XMM04=1a5d5ae734d184ae00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133518 XMM06=c291bd5c70af25b900000000001333a0 XMM07=e042d86d42eb936e0000000000123c20 XMM08=e8abfdf62e1dae8e000000000011f260 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000