syzkaller login: [ 38.709455] BUG: Bad rss-counter state mm:00000000f0186aa2 type:MM_FILEPAGES val:33 [ 38.710683] BUG: Bad rss-counter state mm:00000000f0186aa2 type:MM_ANONPAGES val:22 [ 38.881338] ================================================================== [ 38.882610] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.883879] Read of size 8 at addr ffff88800ecc35c8 by task sshd/219 [ 38.884747] [ 38.884990] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.885925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.886974] Call Trace: [ 38.887330] [ 38.887646] dump_stack_lvl+0x91/0xf0 [ 38.888194] print_report+0xcc/0x620 [ 38.888741] ? __virt_addr_valid+0x102/0x340 [ 38.889368] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890060] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890741] kasan_report+0xbe/0xf0 [ 38.891279] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.891983] vma_interval_tree_remove+0xc75/0xec0 [ 38.892670] vma_prepare+0xc54/0x11a0 [ 38.893215] __split_vma+0x5af/0x950 [ 38.893732] ? __pfx___split_vma+0x10/0x10 [ 38.894294] ? find_held_lock+0x2c/0x110 [ 38.894857] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.895494] ? lock_is_held_type+0x9f/0x120 [ 38.896050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.896669] ? mtree_range_walk+0x632/0x900 [ 38.897223] ? mas_walk+0x5c7/0x7c0 [ 38.897714] do_vmi_munmap+0x1f1/0x2b0 [ 38.898227] mmap_region+0x1f9/0x2660 [ 38.898755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.899348] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.900105] ? __pfx_lock_acquire+0x10/0x10 [ 38.900656] ? __pfx_mmap_region+0x10/0x10 [ 38.901196] ? security_mmap_addr+0x7d/0xa0 [ 38.901768] ? get_unmapped_area+0x1f5/0x3f0 [ 38.902419] do_mmap+0x854/0xf00 [ 38.902932] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.903501] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.904091] ksys_mmap_pgoff+0x3af/0x500 [ 38.904601] do_syscall_64+0x3f/0x90 [ 38.905093] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.905783] RIP: 0033:0x7f2a3b922d82 [ 38.906330] 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 [ 38.908758] RSP: 002b:00007ffda58dbbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.909779] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a3b922d82 [ 38.910757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a3ad5c000 [ 38.911736] RBP: 00007f2a3ad5c000 R08: 0000000000000009 R09: 0000000000001000 [ 38.912600] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d629e7dec0 [ 38.913616] R13: 00007ffda58dbbf0 R14: 00007ffda58dbc20 R15: 00007ffda58dbf80 [ 38.914495] [ 38.914830] [ 38.915088] Allocated by task 212: [ 38.915588] kasan_save_stack+0x22/0x50 [ 38.916101] kasan_set_track+0x25/0x30 [ 38.916603] __kasan_slab_alloc+0x59/0x70 [ 38.917232] kmem_cache_alloc+0x16b/0x370 [ 38.917813] vm_area_dup+0x20/0x160 [ 38.918277] __split_vma+0x170/0x950 [ 38.918789] split_vma+0xc6/0x110 [ 38.919308] mprotect_fixup+0x8d2/0xb30 [ 38.919870] do_mprotect_pkey+0x87e/0xd40 [ 38.920404] __x64_sys_mprotect+0x78/0xc0 [ 38.920940] do_syscall_64+0x3f/0x90 [ 38.921421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.922090] [ 38.922307] Freed by task 212: [ 38.922731] kasan_save_stack+0x22/0x50 [ 38.923328] kasan_set_track+0x25/0x30 [ 38.923868] kasan_save_free_info+0x2b/0x50 [ 38.924403] __kasan_slab_free+0x10a/0x190 [ 38.924949] kmem_cache_free+0x10d/0x4d0 [ 38.925516] rcu_core+0x8c8/0x2860 [ 38.926045] __do_softirq+0x1b7/0x7d4 [ 38.926605] [ 38.926864] Last potentially related work creation: [ 38.927578] kasan_save_stack+0x22/0x50 [ 38.928096] __kasan_record_aux_stack+0x8e/0xa0 [ 38.928696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.929472] remove_vma+0x139/0x170 [ 38.930027] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.930702] do_vmi_munmap+0x1f1/0x2b0 [ 38.931290] __vm_munmap+0x138/0x3a0 [ 38.931822] __x64_sys_munmap+0x59/0x80 [ 38.932331] do_syscall_64+0x3f/0x90 [ 38.932812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.933460] [ 38.933677] The buggy address belongs to the object at ffff88800ecc3570 [ 38.933677] which belongs to the cache vm_area_struct of size 168 [ 38.935300] The buggy address is located 88 bytes inside of [ 38.935300] freed 168-byte region [ffff88800ecc3570, ffff88800ecc3618) [ 38.936962] [ 38.937181] The buggy address belongs to the physical page: [ 38.937846] page:0000000051f2dc80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecc3 [ 38.939008] memcg:ffff88800e2c6f01 [ 38.939539] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.940348] page_type: 0xffffffff() [ 38.940872] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d9fc0 dead000000000008 [ 38.941811] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2c6f01 [ 38.942766] page dumped because: kasan: bad access detected [ 38.943592] [ 38.943822] Memory state around the buggy address: [ 38.944399] ffff88800ecc3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.945267] ffff88800ecc3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.946162] >ffff88800ecc3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.947013] ^ [ 38.947674] ffff88800ecc3600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.948524] ffff88800ecc3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.949378] ================================================================== [ 38.950504] Disabling lock debugging due to kernel taint [ 40.955003] BUG: Bad rss-counter state mm:00000000a8f55cb7 type:MM_FILEPAGES val:33 [ 40.956148] BUG: Bad rss-counter state mm:00000000a8f55cb7 type:MM_ANONPAGES val:22 [ 41.501093] BUG: Bad rss-counter state mm:00000000c6f9915b type:MM_FILEPAGES val:33 [ 41.502285] BUG: Bad rss-counter state mm:00000000c6f9915b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59651' (ECDSA) to the list of known hosts. 2023/06/20 17:40:37 fuzzer started 2023/06/20 17:40:37 dialing manager at localhost:36067 2023/06/20 17:40:37 checking machine... 2023/06/20 17:40:37 checking revisions... [ 42.160153] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:40:37 testing simple program... [ 42.215200] cgroup: Unknown subsys name 'net' [ 42.298243] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:40:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fd3e8e12477 RCX=0000000000000000 RDX=ffff888016713680 RSI=ffffffff81007b50 RDI=00007fd3e8e12477 RBP=0000000000000001 RSP=ffff888009f37930 R8 =ffffffff864bbb58 R9 =ffff888009f379e8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888009f37a70 R13=0000000000000000 R14=ffff888016713680 R15=0000000000000cc0 RIP=ffffffff81007b56 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 00007fd3e891f900 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=00007fc7da4c0378 CR3=000000000f6d0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=000000000001c060 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffffffff85a23960 RSP=ffff88800a20f7f0 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=0000000000000000 R12=000000000001c060 R13=ffff88800f3501a0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff82191d9e RFL=00000093 [--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 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=00007fd3e8ed4650 CR3=000000000f6d0000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000