syzkaller login: [ 32.685197] BUG: Bad rss-counter state mm:00000000b24d7735 type:MM_FILEPAGES val:33 [ 32.686418] BUG: Bad rss-counter state mm:00000000b24d7735 type:MM_ANONPAGES val:22 [ 32.726911] ================================================================== [ 32.727948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.729159] Read of size 8 at addr ffff888016e8b6b0 by task sshd/219 [ 32.730039] [ 32.730342] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.731301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.732427] Call Trace: [ 32.732775] [ 32.733105] dump_stack_lvl+0x91/0xf0 [ 32.733711] print_report+0xcc/0x620 [ 32.734328] ? __virt_addr_valid+0x102/0x340 [ 32.735036] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.735694] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.736362] kasan_report+0xbe/0xf0 [ 32.736887] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.737553] vma_interval_tree_remove+0xc75/0xec0 [ 32.738218] vma_prepare+0xc54/0x11a0 [ 32.738727] __split_vma+0x5af/0x950 [ 32.739235] ? __pfx___split_vma+0x10/0x10 [ 32.739796] ? find_held_lock+0x2c/0x110 [ 32.740349] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.740946] ? lock_is_held_type+0x9f/0x120 [ 32.741517] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.742175] ? mtree_range_walk+0x632/0x900 [ 32.742775] ? mas_walk+0x5c7/0x7c0 [ 32.743300] do_vmi_munmap+0x1f1/0x2b0 [ 32.743843] mmap_region+0x1f9/0x2660 [ 32.744377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.744944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.745729] ? __pfx_lock_acquire+0x10/0x10 [ 32.746352] ? __pfx_mmap_region+0x10/0x10 [ 32.746941] ? security_mmap_addr+0x7d/0xa0 [ 32.747536] ? get_unmapped_area+0x1f5/0x3f0 [ 32.748140] do_mmap+0x854/0xf00 [ 32.748623] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.749170] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.749790] ksys_mmap_pgoff+0x3af/0x500 [ 32.750360] do_syscall_64+0x3f/0x90 [ 32.750890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.751606] RIP: 0033:0x7f81e06e6d82 [ 32.752115] 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 [ 32.754459] RSP: 002b:00007ffef4a93508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.755461] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81e06e6d82 [ 32.756394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81dfb20000 [ 32.757330] RBP: 00007f81dfb20000 R08: 0000000000000009 R09: 0000000000001000 [ 32.758284] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d68746f70 [ 32.759217] R13: 00007ffef4a93520 R14: 00007ffef4a93550 R15: 00007ffef4a938b0 [ 32.760160] [ 32.760485] [ 32.760718] Allocated by task 212: [ 32.761192] kasan_save_stack+0x22/0x50 [ 32.761749] kasan_set_track+0x25/0x30 [ 32.762301] __kasan_slab_alloc+0x59/0x70 [ 32.762884] kmem_cache_alloc+0x16b/0x370 [ 32.763461] vm_area_dup+0x20/0x160 [ 32.763962] __split_vma+0x170/0x950 [ 32.764480] split_vma+0xc6/0x110 [ 32.764964] mprotect_fixup+0x8d2/0xb30 [ 32.765520] do_mprotect_pkey+0x87e/0xd40 [ 32.766118] __x64_sys_mprotect+0x78/0xc0 [ 32.766695] do_syscall_64+0x3f/0x90 [ 32.767213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.767927] [ 32.768165] Freed by task 212: [ 32.768593] kasan_save_stack+0x22/0x50 [ 32.769151] kasan_set_track+0x25/0x30 [ 32.769694] kasan_save_free_info+0x2b/0x50 [ 32.770289] __kasan_slab_free+0x10a/0x190 [ 32.770976] kmem_cache_free+0x10d/0x4d0 [ 32.771534] rcu_core+0x8c8/0x2860 [ 32.772021] __do_softirq+0x1b7/0x7d4 [ 32.772545] [ 32.772785] Last potentially related work creation: [ 32.773434] kasan_save_stack+0x22/0x50 [ 32.773989] __kasan_record_aux_stack+0x8e/0xa0 [ 32.774637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.775356] remove_vma+0x139/0x170 [ 32.775857] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.776473] do_vmi_munmap+0x1f1/0x2b0 [ 32.777011] __vm_munmap+0x138/0x3a0 [ 32.777525] __x64_sys_munmap+0x59/0x80 [ 32.778079] do_syscall_64+0x3f/0x90 [ 32.778606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.779315] [ 32.779554] The buggy address belongs to the object at ffff888016e8b658 [ 32.779554] which belongs to the cache vm_area_struct of size 168 [ 32.781167] The buggy address is located 88 bytes inside of [ 32.781167] freed 168-byte region [ffff888016e8b658, ffff888016e8b700) [ 32.782732] [ 32.782975] The buggy address belongs to the physical page: [ 32.783703] page:0000000061e414fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e8b [ 32.784913] memcg:ffff888016e8c001 [ 32.785384] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.786172] page_type: 0xffffffff() [ 32.786671] raw: 0100000000000200 ffff88800879fc80 ffffea00002619c0 dead000000000003 [ 32.787682] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e8c001 [ 32.788692] page dumped because: kasan: bad access detected [ 32.789430] [ 32.789666] Memory state around the buggy address: [ 32.790317] ffff888016e8b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.791269] ffff888016e8b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.792182] >ffff888016e8b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.793091] ^ [ 32.793716] ffff888016e8b700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 32.794643] ffff888016e8b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.795540] ================================================================== [ 32.796661] Disabling lock debugging due to kernel taint [ 34.582301] BUG: Bad rss-counter state mm:000000002b436a59 type:MM_FILEPAGES val:33 [ 34.583303] BUG: Bad rss-counter state mm:000000002b436a59 type:MM_ANONPAGES val:22 [ 35.101472] BUG: Bad rss-counter state mm:000000003e767060 type:MM_FILEPAGES val:33 [ 35.102517] BUG: Bad rss-counter state mm:000000003e767060 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29836' (ECDSA) to the list of known hosts. 2023/06/19 20:24:28 fuzzer started 2023/06/19 20:24:28 dialing manager at localhost:44161 2023/06/19 20:24:28 checking machine... 2023/06/19 20:24:28 checking revisions... [ 35.804967] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:24:28 testing simple program... [ 35.856361] cgroup: Unknown subsys name 'net' [ 35.893945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:24:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff888015ab51c0 RSI=ffffffff817f69ba RDI=0000000000000003 RBP=ffffffff87b7ae20 RSP=ffff888019aef508 R8 =0000000000000003 R9 =0000000000000000 R10=0000000000000001 R11=63206e6f69737365 R12=0000000000092820 R13=0000000000000000 R14=0000000000000000 R15=00000000ffffffff RIP=ffffffff814c07e0 RFL=00000293 [--S-A-C] 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 00007f0c777fe700 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=00007ffe64860f28 CR3=000000000f192000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732037323a3432 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383031 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000005 RBX=00007fc98853a4a0 RCX=00007fc9884683f5 RDX=00007ffc8319c820 RSI=00007ffc8319c820 RDI=0000000000000008 RBP=0000562e63059f70 RSP=00007ffc8319c818 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000246 R12=00007fc987f86900 R13=00007ffc8319c9b8 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84600007 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 00007fc987f86900 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=00007ffc83197000 CR3=000000000f320000 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=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