syzkaller login: [ 33.663645] BUG: Bad rss-counter state mm:00000000b282b1dc type:MM_FILEPAGES val:33 [ 33.665078] BUG: Bad rss-counter state mm:00000000b282b1dc type:MM_ANONPAGES val:22 [ 33.829645] ================================================================== [ 33.830547] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.831507] Read of size 8 at addr ffff888019fe6880 by task sshd/220 [ 33.832274] [ 33.832497] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.833460] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.834438] Call Trace: [ 33.834761] [ 33.835098] dump_stack_lvl+0x91/0xf0 [ 33.835596] print_report+0xcc/0x620 [ 33.836090] ? __virt_addr_valid+0x102/0x340 [ 33.836648] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.837274] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.837896] kasan_report+0xbe/0xf0 [ 33.838378] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.839002] vma_interval_tree_remove+0xc75/0xec0 [ 33.839629] vma_prepare+0xc54/0x11a0 [ 33.840118] __split_vma+0x5af/0x950 [ 33.840623] ? __pfx___split_vma+0x10/0x10 [ 33.841181] ? find_held_lock+0x2c/0x110 [ 33.841734] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.842329] ? lock_is_held_type+0x9f/0x120 [ 33.842898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.843556] ? mtree_range_walk+0x632/0x900 [ 33.844143] ? mas_walk+0x5c7/0x7c0 [ 33.844645] do_vmi_munmap+0x1f1/0x2b0 [ 33.845168] mmap_region+0x1f9/0x2660 [ 33.845683] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.846226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.846986] ? __pfx_lock_acquire+0x10/0x10 [ 33.847587] ? __pfx_mmap_region+0x10/0x10 [ 33.848144] ? security_mmap_addr+0x7d/0xa0 [ 33.848706] ? get_unmapped_area+0x1f5/0x3f0 [ 33.849293] do_mmap+0x854/0xf00 [ 33.849756] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.850284] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.850872] ksys_mmap_pgoff+0x3af/0x500 [ 33.851409] do_syscall_64+0x3f/0x90 [ 33.851918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.852603] RIP: 0033:0x7f0e7698ed82 [ 33.853083] 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 [ 33.855338] RSP: 002b:00007ffe989e1008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.856294] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e7698ed82 [ 33.857192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e75dc8000 [ 33.858083] RBP: 00007f0e75dc8000 R08: 0000000000000009 R09: 0000000000001000 [ 33.858976] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf6cbe2f60 [ 33.859880] R13: 00007ffe989e1020 R14: 00007ffe989e1050 R15: 00007ffe989e13b0 [ 33.860785] [ 33.861093] [ 33.861318] Allocated by task 213: [ 33.861775] kasan_save_stack+0x22/0x50 [ 33.862312] kasan_set_track+0x25/0x30 [ 33.862835] __kasan_slab_alloc+0x59/0x70 [ 33.863405] kmem_cache_alloc+0x16b/0x370 [ 33.863949] vm_area_dup+0x20/0x160 [ 33.864433] __split_vma+0x170/0x950 [ 33.864926] split_vma+0xc6/0x110 [ 33.865388] mprotect_fixup+0x8d2/0xb30 [ 33.865917] do_mprotect_pkey+0x87e/0xd40 [ 33.866474] __x64_sys_mprotect+0x78/0xc0 [ 33.867031] do_syscall_64+0x3f/0x90 [ 33.867534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.868214] [ 33.868441] Freed by task 203: [ 33.868866] kasan_save_stack+0x22/0x50 [ 33.869398] kasan_set_track+0x25/0x30 [ 33.869919] kasan_save_free_info+0x2b/0x50 [ 33.870485] __kasan_slab_free+0x10a/0x190 [ 33.871051] kmem_cache_free+0x10d/0x4d0 [ 33.871585] rcu_core+0x8c8/0x2860 [ 33.872108] __do_softirq+0x1b7/0x7d4 [ 33.872630] [ 33.872855] Last potentially related work creation: [ 33.873477] kasan_save_stack+0x22/0x50 [ 33.874006] __kasan_record_aux_stack+0x8e/0xa0 [ 33.874610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.875316] remove_vma+0x139/0x170 [ 33.875808] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.876396] do_vmi_munmap+0x1f1/0x2b0 [ 33.876913] __vm_munmap+0x138/0x3a0 [ 33.877403] __x64_sys_munmap+0x59/0x80 [ 33.877934] do_syscall_64+0x3f/0x90 [ 33.878431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.879122] [ 33.879347] The buggy address belongs to the object at ffff888019fe6828 [ 33.879347] which belongs to the cache vm_area_struct of size 168 [ 33.880910] The buggy address is located 88 bytes inside of [ 33.880910] freed 168-byte region [ffff888019fe6828, ffff888019fe68d0) [ 33.882392] [ 33.882620] The buggy address belongs to the physical page: [ 33.883331] page:00000000231b2634 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fe6 [ 33.884496] memcg:ffff888019d2dd01 [ 33.884960] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.885697] page_type: 0xffffffff() [ 33.886171] raw: 0100000000000200 ffff88800879fc80 ffffea000036d6c0 dead000000000005 [ 33.887160] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d2dd01 [ 33.888117] page dumped because: kasan: bad access detected [ 33.888821] [ 33.889045] Memory state around the buggy address: [ 33.889662] ffff888019fe6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.890562] ffff888019fe6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.891480] >ffff888019fe6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.892373] ^ [ 33.892810] ffff888019fe6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.893708] ffff888019fe6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 33.894602] ================================================================== [ 33.895649] Disabling lock debugging due to kernel taint [ 35.888011] BUG: Bad rss-counter state mm:000000004f20eb71 type:MM_FILEPAGES val:33 [ 35.889003] BUG: Bad rss-counter state mm:000000004f20eb71 type:MM_ANONPAGES val:22 [ 36.337208] BUG: Bad rss-counter state mm:00000000825c0faa type:MM_FILEPAGES val:33 [ 36.338189] BUG: Bad rss-counter state mm:00000000825c0faa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52016' (ECDSA) to the list of known hosts. 2023/06/20 02:07:49 fuzzer started 2023/06/20 02:07:49 dialing manager at localhost:44161 2023/06/20 02:07:49 checking machine... 2023/06/20 02:07:49 checking revisions... [ 37.176811] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:07:49 testing simple program... [ 37.226871] cgroup: Unknown subsys name 'net' [ 37.270643] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:07:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880088c2a48 RCX=ffffffff818a31d1 RDX=ffff888010320000 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff88801035fa10 R8 =0000000000000007 R9 =0000000000000000 R10=8000000080000000 R11=0000000000000001 R12=fefefefefefefeff R13=0000000000000000 R14=8000000080000000 R15=2f676f6c2f6e7572 RIP=ffffffff814c01fc RFL=00000246 [---Z-P-] 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 00007f5ca6029900 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=00007f5ca544dfd8 CR3=000000000c4b8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ecb223635537dc9700000000000ae988 XMM05=42805dc8d170e60b0000000000134a20 XMM06=4fda316b135da52b0000000000133810 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000013b RDI=ffffffff849ef220 RBP=ffffffff849ef220 RSP=ffff888016847748 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000013b R13=ffff888016847e70 R14=00000000000000a4 R15=ffff888016847e70 RIP=ffffffff8122e3aa RFL=00000246 [---Z-P-] 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 00007f6670d05900 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=00007ffee5b6d000 CR3=000000001a79c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000