syzkaller login: [ 46.535692] BUG: Bad rss-counter state mm:00000000b5d1dcd1 type:MM_FILEPAGES val:33 [ 46.536950] BUG: Bad rss-counter state mm:00000000b5d1dcd1 type:MM_ANONPAGES val:22 [ 46.690124] ================================================================== [ 46.691039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.691974] Read of size 8 at addr ffff888016a52228 by task sshd/220 [ 46.692830] [ 46.693050] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.693904] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.694873] Call Trace: [ 46.695193] [ 46.695473] dump_stack_lvl+0x91/0xf0 [ 46.695952] print_report+0xcc/0x620 [ 46.696437] ? __virt_addr_valid+0x102/0x340 [ 46.697011] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.697627] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.698273] kasan_report+0xbe/0xf0 [ 46.698750] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.699367] vma_interval_tree_remove+0xc75/0xec0 [ 46.699970] vma_prepare+0xc54/0x11a0 [ 46.700453] __split_vma+0x5af/0x950 [ 46.700934] ? __pfx___split_vma+0x10/0x10 [ 46.701479] ? find_held_lock+0x2c/0x110 [ 46.702008] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.702585] ? lock_is_held_type+0x9f/0x120 [ 46.703162] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.703763] ? mtree_range_walk+0x632/0x900 [ 46.704312] ? mas_walk+0x5c7/0x7c0 [ 46.704818] do_vmi_munmap+0x1f1/0x2b0 [ 46.705310] mmap_region+0x1f9/0x2660 [ 46.705783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.706293] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.707024] ? __pfx_lock_acquire+0x10/0x10 [ 46.707548] ? __pfx_mmap_region+0x10/0x10 [ 46.708083] ? security_mmap_addr+0x7d/0xa0 [ 46.708611] ? get_unmapped_area+0x1f5/0x3f0 [ 46.709163] do_mmap+0x854/0xf00 [ 46.709595] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.710078] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.710639] ksys_mmap_pgoff+0x3af/0x500 [ 46.711145] do_syscall_64+0x3f/0x90 [ 46.711616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.712292] RIP: 0033:0x7f227edeed82 [ 46.712783] 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 [ 46.714994] RSP: 002b:00007fff480d3718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.715934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f227edeed82 [ 46.716804] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f227e228000 [ 46.717647] RBP: 00007f227e228000 R08: 0000000000000009 R09: 0000000000001000 [ 46.718483] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623892e8b20 [ 46.719320] R13: 00007fff480d3730 R14: 00007fff480d3760 R15: 00007fff480d3ac0 [ 46.720168] [ 46.720457] [ 46.720680] Allocated by task 213: [ 46.721099] kasan_save_stack+0x22/0x50 [ 46.721605] kasan_set_track+0x25/0x30 [ 46.722091] __kasan_slab_alloc+0x59/0x70 [ 46.722605] kmem_cache_alloc+0x16b/0x370 [ 46.723114] vm_area_dup+0x20/0x160 [ 46.723563] __split_vma+0x170/0x950 [ 46.724024] split_vma+0xc6/0x110 [ 46.724473] mprotect_fixup+0x8d2/0xb30 [ 46.724995] do_mprotect_pkey+0x87e/0xd40 [ 46.725511] __x64_sys_mprotect+0x78/0xc0 [ 46.726022] do_syscall_64+0x3f/0x90 [ 46.726490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.727132] [ 46.727347] Freed by task 213: [ 46.727735] kasan_save_stack+0x22/0x50 [ 46.728236] kasan_set_track+0x25/0x30 [ 46.728729] kasan_save_free_info+0x2b/0x50 [ 46.729252] __kasan_slab_free+0x10a/0x190 [ 46.729775] kmem_cache_free+0x10d/0x4d0 [ 46.730283] rcu_core+0x8c8/0x2860 [ 46.730726] __do_softirq+0x1b7/0x7d4 [ 46.731202] [ 46.731415] Last potentially related work creation: [ 46.732004] kasan_save_stack+0x22/0x50 [ 46.732512] __kasan_record_aux_stack+0x8e/0xa0 [ 46.733081] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.733712] remove_vma+0x139/0x170 [ 46.734154] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.734705] do_vmi_munmap+0x1f1/0x2b0 [ 46.735192] __vm_munmap+0x138/0x3a0 [ 46.735656] __x64_sys_munmap+0x59/0x80 [ 46.736148] do_syscall_64+0x3f/0x90 [ 46.736633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.737267] [ 46.737481] Second to last potentially related work creation: [ 46.738155] kasan_save_stack+0x22/0x50 [ 46.738652] __kasan_record_aux_stack+0x8e/0xa0 [ 46.739254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.739938] remove_vma+0x139/0x170 [ 46.740397] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.740967] do_vmi_munmap+0x1f1/0x2b0 [ 46.741468] mmap_region+0x1f9/0x2660 [ 46.741955] do_mmap+0x854/0xf00 [ 46.742383] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.742870] ksys_mmap_pgoff+0x3af/0x500 [ 46.743374] do_syscall_64+0x3f/0x90 [ 46.743848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.744531] [ 46.744770] The buggy address belongs to the object at ffff888016a521d0 [ 46.744770] which belongs to the cache vm_area_struct of size 168 [ 46.746216] The buggy address is located 88 bytes inside of [ 46.746216] freed 168-byte region [ffff888016a521d0, ffff888016a52278) [ 46.747623] [ 46.747837] The buggy address belongs to the physical page: [ 46.748550] page:000000003913b13b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a52 [ 46.749640] memcg:ffff88800eb36501 [ 46.750074] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 46.750812] page_type: 0xffffffff() [ 46.751267] raw: 0100000000000200 ffff88800879fc80 ffffea00005a9780 dead000000000005 [ 46.752177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb36501 [ 46.753096] page dumped because: kasan: bad access detected [ 46.753749] [ 46.753966] Memory state around the buggy address: [ 46.754546] ffff888016a52100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.755388] ffff888016a52180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 46.756232] >ffff888016a52200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 46.757090] ^ [ 46.757649] ffff888016a52280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 46.758491] ffff888016a52300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 46.759334] ================================================================== [ 46.760345] Disabling lock debugging due to kernel taint [ 48.578323] BUG: Bad rss-counter state mm:00000000e8fd8de9 type:MM_FILEPAGES val:33 [ 48.579391] BUG: Bad rss-counter state mm:00000000e8fd8de9 type:MM_ANONPAGES val:22 [ 49.036518] BUG: Bad rss-counter state mm:0000000044d4c031 type:MM_FILEPAGES val:33 [ 49.037680] BUG: Bad rss-counter state mm:0000000044d4c031 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45962' (ECDSA) to the list of known hosts. 2023/06/20 06:09:32 fuzzer started 2023/06/20 06:09:32 dialing manager at localhost:44161 2023/06/20 06:09:32 checking machine... 2023/06/20 06:09:32 checking revisions... [ 49.690371] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:09:32 testing simple program... [ 49.729513] cgroup: Unknown subsys name 'net' [ 49.793101] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:09:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff88800f219b40 RSI=ffffffff8113b0d3 RDI=ffff88800e431e90 RBP=ffff88800e431e80 RSP=ffff888018177e98 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=ffff888019cbef00 R14=ffff88800e431e80 R15=0000000000000001 RIP=ffffffff8113b0d3 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa4a20e4900 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=000055812d291744 CR3=000000000dc06000 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=0000000000000000000055812b1b6060 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=dffffc0000000000 RBX=ffff888015827648 RCX=ffffffff860d6801 RDX=0000000000000000 RSI=ffffffff8180c522 RDI=ffff888015827654 RBP=0000000000000000 RSP=ffff888015827560 R8 =ffffffff860d68fa R9 =ffff8880158275c0 R10=0000000000038001 R11=0000000000010b7e R12=ffff888015827648 R13=0000000000000000 R14=ffff888015828000 R15=ffff88800db50100 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007f6e9a60c900 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=00007f6e99a78740 CR3=000000000cafa000 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=cf586eeb10073291914c6d1a36993ba8 XMM02=000000000011d950eff9b2d0a8fce9cb XMM03=000000000011da202c67c8bc2e329bc3 XMM04=cc21a7f007f747b700000000000ae988 XMM05=e4ad7bf08f1153d200000000001367e8 XMM06=19e9129bd510f2350000000000134f80 XMM07=fb795ef6d65770560000000000124360 XMM08=2c67c8bc2e329bc3000000000011d9c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000