syzkaller login: [ 30.890439] BUG: Bad rss-counter state mm:00000000cc845105 type:MM_FILEPAGES val:33 [ 30.891665] BUG: Bad rss-counter state mm:00000000cc845105 type:MM_ANONPAGES val:22 [ 30.926095] ================================================================== [ 30.927458] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.928825] Read of size 8 at addr ffff88800f18d3f8 by task sshd/220 [ 30.929999] [ 30.930276] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.931518] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.932924] Call Trace: [ 30.933310] [ 30.933648] dump_stack_lvl+0x91/0xf0 [ 30.934252] print_report+0xcc/0x620 [ 30.934833] ? __virt_addr_valid+0x102/0x340 [ 30.935505] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936226] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.936926] kasan_report+0xbe/0xf0 [ 30.937414] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.938041] vma_interval_tree_remove+0xc75/0xec0 [ 30.938652] vma_prepare+0xc54/0x11a0 [ 30.939133] __split_vma+0x5af/0x950 [ 30.939613] ? __pfx___split_vma+0x10/0x10 [ 30.940139] ? find_held_lock+0x2c/0x110 [ 30.940672] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.941359] ? lock_is_held_type+0x9f/0x120 [ 30.942022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.942766] ? mtree_range_walk+0x632/0x900 [ 30.943438] ? mas_walk+0x5c7/0x7c0 [ 30.944021] do_vmi_munmap+0x1f1/0x2b0 [ 30.944652] mmap_region+0x1f9/0x2660 [ 30.945244] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.945877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.946746] ? __pfx_lock_acquire+0x10/0x10 [ 30.947399] ? __pfx_mmap_region+0x10/0x10 [ 30.948043] ? security_mmap_addr+0x7d/0xa0 [ 30.948697] ? get_unmapped_area+0x1f5/0x3f0 [ 30.949372] do_mmap+0x854/0xf00 [ 30.949895] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.950496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.951177] ksys_mmap_pgoff+0x3af/0x500 [ 30.951755] do_syscall_64+0x3f/0x90 [ 30.952213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.952843] RIP: 0033:0x7f0953c64d82 [ 30.953279] 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 [ 30.955473] RSP: 002b:00007ffd77f28d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.956336] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0953c64d82 [ 30.957156] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f095309e000 [ 30.957948] RBP: 00007f095309e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.958756] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e2c569ec0 [ 30.959623] R13: 00007ffd77f28d70 R14: 00007ffd77f28da0 R15: 00007ffd77f29100 [ 30.960497] [ 30.960828] [ 30.961047] Allocated by task 213: [ 30.961483] kasan_save_stack+0x22/0x50 [ 30.961988] kasan_set_track+0x25/0x30 [ 30.962489] __kasan_slab_alloc+0x59/0x70 [ 30.963020] kmem_cache_alloc+0x16b/0x370 [ 30.963546] vm_area_dup+0x20/0x160 [ 30.964005] __split_vma+0x170/0x950 [ 30.964474] split_vma+0xc6/0x110 [ 30.964920] mprotect_fixup+0x8d2/0xb30 [ 30.965431] do_mprotect_pkey+0x87e/0xd40 [ 30.965955] __x64_sys_mprotect+0x78/0xc0 [ 30.966488] do_syscall_64+0x3f/0x90 [ 30.966971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.967632] [ 30.967852] Freed by task 213: [ 30.968250] kasan_save_stack+0x22/0x50 [ 30.968770] kasan_set_track+0x25/0x30 [ 30.969269] kasan_save_free_info+0x2b/0x50 [ 30.969807] __kasan_slab_free+0x10a/0x190 [ 30.970349] kmem_cache_free+0x10d/0x4d0 [ 30.970860] rcu_core+0x8c8/0x2860 [ 30.971307] __do_softirq+0x1b7/0x7d4 [ 30.971788] [ 30.972008] Last potentially related work creation: [ 30.972620] kasan_save_stack+0x22/0x50 [ 30.973129] __kasan_record_aux_stack+0x8e/0xa0 [ 30.973710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.974360] remove_vma+0x139/0x170 [ 30.974818] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.975382] do_vmi_munmap+0x1f1/0x2b0 [ 30.975878] __vm_munmap+0x138/0x3a0 [ 30.976353] __x64_sys_munmap+0x59/0x80 [ 30.976863] do_syscall_64+0x3f/0x90 [ 30.977343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977993] [ 30.978221] Second to last potentially related work creation: [ 30.978918] kasan_save_stack+0x22/0x50 [ 30.979467] __kasan_record_aux_stack+0x8e/0xa0 [ 30.980070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.980719] remove_vma+0x139/0x170 [ 30.981148] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.981678] do_vmi_munmap+0x1f1/0x2b0 [ 30.982144] mmap_region+0x1f9/0x2660 [ 30.982597] do_mmap+0x854/0xf00 [ 30.983017] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.983487] ksys_mmap_pgoff+0x3af/0x500 [ 30.984035] do_syscall_64+0x3f/0x90 [ 30.984544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.985201] [ 30.985422] The buggy address belongs to the object at ffff88800f18d3a0 [ 30.985422] which belongs to the cache vm_area_struct of size 168 [ 30.986937] The buggy address is located 88 bytes inside of [ 30.986937] freed 168-byte region [ffff88800f18d3a0, ffff88800f18d448) [ 30.988383] [ 30.988604] The buggy address belongs to the physical page: [ 30.989269] page:0000000008a7adbf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf18d [ 30.990397] memcg:ffff888014581501 [ 30.990835] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.991520] page_type: 0xffffffff() [ 30.991994] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c32c0 dead000000000008 [ 30.992944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014581501 [ 30.993879] page dumped because: kasan: bad access detected [ 30.994562] [ 30.994777] Memory state around the buggy address: [ 30.995368] ffff88800f18d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.996336] ffff88800f18d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.997214] >ffff88800f18d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.998068] ^ [ 30.998918] ffff88800f18d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.999772] ffff88800f18d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.000687] ================================================================== [ 31.001650] Disabling lock debugging due to kernel taint [ 32.985547] BUG: Bad rss-counter state mm:000000003edb167b type:MM_FILEPAGES val:33 [ 32.986543] BUG: Bad rss-counter state mm:000000003edb167b type:MM_ANONPAGES val:22 [ 33.451557] BUG: Bad rss-counter state mm:000000000d0ac6e9 type:MM_FILEPAGES val:33 [ 33.452770] BUG: Bad rss-counter state mm:000000000d0ac6e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51105' (ECDSA) to the list of known hosts. 2023/06/20 13:53:33 fuzzer started 2023/06/20 13:53:33 dialing manager at localhost:36067 2023/06/20 13:53:33 checking machine... 2023/06/20 13:53:33 checking revisions... [ 34.219047] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:53:34 testing simple program... [ 34.277509] cgroup: Unknown subsys name 'net' [ 34.323110] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:53:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008c5f500 RCX=ffffffff81edb9ff RDX=ffff88801745b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888008c5f500 RSP=ffff88800fc27d30 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000001 R13=ffff888008c5f5f0 R14=ffff888008c5f500 R15=ffffed1002e8b7c6 RIP=ffffffff814c0864 RFL=00000202 [-------] 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 00007f5ff175f900 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=00007f5ff171301c CR3=000000000d5e2000 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=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 info registers vcpu 1 RAX=00000000e9a4b31c RBX=7fffffffffffffff RCX=0000000000000001 RDX=0000000000000016 RSI=00007ffe93a5ffe0 RDI=0000000000000000 RBP=00007ffe93a5ffb0 RSP=00007ffe93a5ff80 R8 =00005637c615b345 R9 =00007ffe93aa8080 R10=00007ffe93aa8080 R11=000000000000da78 R12=00007ffe93a5ffe0 R13=000000000000074c R14=000000000000004f R15=00007ffe93a60290 RIP=00007ffe93aac997 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 00007ff79ea87900 00000000 00000000 GS =0000 0000000000000000 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=000055b6dbca4000 CR3=000000000f68c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3bcf09e6d80479dd00000000000ae988 XMM05=2834e4b352d730570000000000133f20 XMM06=77c4f50b623b8e840000000000132cc0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000