syzkaller login: [ 38.829168] BUG: Bad rss-counter state mm:000000001fe4dca6 type:MM_FILEPAGES val:33 [ 38.830378] BUG: Bad rss-counter state mm:000000001fe4dca6 type:MM_ANONPAGES val:22 [ 38.868885] ================================================================== [ 38.869959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.870876] Read of size 8 at addr ffff88800e4dbc20 by task sshd/225 [ 38.871630] [ 38.871888] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.872745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.873721] Call Trace: [ 38.874039] [ 38.874314] dump_stack_lvl+0x91/0xf0 [ 38.874801] print_report+0xcc/0x620 [ 38.875282] ? __virt_addr_valid+0x102/0x340 [ 38.875835] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876446] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877049] kasan_report+0xbe/0xf0 [ 38.877518] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878136] vma_interval_tree_remove+0xc75/0xec0 [ 38.878732] vma_prepare+0xc54/0x11a0 [ 38.879203] __split_vma+0x5af/0x950 [ 38.879676] ? __pfx___split_vma+0x10/0x10 [ 38.880208] ? find_held_lock+0x2c/0x110 [ 38.880729] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.881288] ? lock_is_held_type+0x9f/0x120 [ 38.881822] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.882422] ? mtree_range_walk+0x632/0x900 [ 38.882970] ? mas_walk+0x5c7/0x7c0 [ 38.883441] do_vmi_munmap+0x1f1/0x2b0 [ 38.883945] mmap_region+0x1f9/0x2660 [ 38.884427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.884934] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.885645] ? __pfx_lock_acquire+0x10/0x10 [ 38.886168] ? __pfx_mmap_region+0x10/0x10 [ 38.886694] ? security_mmap_addr+0x7d/0xa0 [ 38.887220] ? get_unmapped_area+0x1f5/0x3f0 [ 38.887772] do_mmap+0x854/0xf00 [ 38.888205] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.888696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.889252] ksys_mmap_pgoff+0x3af/0x500 [ 38.889754] do_syscall_64+0x3f/0x90 [ 38.890232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.890869] RIP: 0033:0x7f607e38fd82 [ 38.891321] 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 [ 38.893431] RSP: 002b:00007ffea7440648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.894328] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f607e38fd82 [ 38.895170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f607d7c9000 [ 38.896022] RBP: 00007f607d7c9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.896860] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652f1ac1ec0 [ 38.897698] R13: 00007ffea7440660 R14: 00007ffea7440690 R15: 00007ffea74409f0 [ 38.898545] [ 38.898831] [ 38.899046] Allocated by task 218: [ 38.899472] kasan_save_stack+0x22/0x50 [ 38.899981] kasan_set_track+0x25/0x30 [ 38.900471] __kasan_slab_alloc+0x59/0x70 [ 38.900988] kmem_cache_alloc+0x16b/0x370 [ 38.901499] vm_area_dup+0x20/0x160 [ 38.901950] __split_vma+0x170/0x950 [ 38.902416] split_vma+0xc6/0x110 [ 38.902849] mprotect_fixup+0x8d2/0xb30 [ 38.903353] do_mprotect_pkey+0x87e/0xd40 [ 38.903884] __x64_sys_mprotect+0x78/0xc0 [ 38.904402] do_syscall_64+0x3f/0x90 [ 38.904873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.905511] [ 38.905723] Freed by task 218: [ 38.906106] kasan_save_stack+0x22/0x50 [ 38.906609] kasan_set_track+0x25/0x30 [ 38.907096] kasan_save_free_info+0x2b/0x50 [ 38.907626] __kasan_slab_free+0x10a/0x190 [ 38.908160] kmem_cache_free+0x10d/0x4d0 [ 38.908662] rcu_core+0x8c8/0x2860 [ 38.909103] __do_softirq+0x1b7/0x7d4 [ 38.909578] [ 38.909791] Last potentially related work creation: [ 38.910367] kasan_save_stack+0x22/0x50 [ 38.910863] __kasan_record_aux_stack+0x8e/0xa0 [ 38.911431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.912086] remove_vma+0x139/0x170 [ 38.912539] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.913098] do_vmi_munmap+0x1f1/0x2b0 [ 38.913585] __vm_munmap+0x138/0x3a0 [ 38.914051] __x64_sys_munmap+0x59/0x80 [ 38.914544] do_syscall_64+0x3f/0x90 [ 38.915024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.915666] [ 38.915889] The buggy address belongs to the object at ffff88800e4dbbc8 [ 38.915889] which belongs to the cache vm_area_struct of size 168 [ 38.917356] The buggy address is located 88 bytes inside of [ 38.917356] freed 168-byte region [ffff88800e4dbbc8, ffff88800e4dbc70) [ 38.918754] [ 38.918971] The buggy address belongs to the physical page: [ 38.919628] page:00000000af029d48 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4db [ 38.920723] memcg:ffff88800efc5701 [ 38.921142] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.921784] page_type: 0xffffffff() [ 38.922241] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.923171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efc5701 [ 38.924079] page dumped because: kasan: bad access detected [ 38.924737] [ 38.924954] Memory state around the buggy address: [ 38.925541] ffff88800e4dbb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.926391] ffff88800e4dbb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.927239] >ffff88800e4dbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.928103] ^ [ 38.928629] ffff88800e4dbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.929490] ffff88800e4dbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.930341] ================================================================== [ 38.931450] Disabling lock debugging due to kernel taint [ 40.862597] BUG: Bad rss-counter state mm:0000000082f6d9d1 type:MM_FILEPAGES val:33 [ 40.863630] BUG: Bad rss-counter state mm:0000000082f6d9d1 type:MM_ANONPAGES val:22 [ 41.348656] BUG: Bad rss-counter state mm:0000000056e7d89c type:MM_FILEPAGES val:33 [ 41.349648] BUG: Bad rss-counter state mm:0000000056e7d89c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36610' (ECDSA) to the list of known hosts. 2023/06/20 21:58:44 fuzzer started 2023/06/20 21:58:44 dialing manager at localhost:36067 2023/06/20 21:58:44 checking machine... 2023/06/20 21:58:44 checking revisions... [ 42.095204] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:58:44 testing simple program... [ 42.148512] cgroup: Unknown subsys name 'net' [ 42.202098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:58:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81809a90 RDX=000000000000809a RSI=000000000000809a RDI=ffffffff86509c58 RBP=ffff888008d9f988 RSP=ffff888008d9f8c0 R8 =0000000000000000 R9 =ffff888008d9f970 R10=0000000000038001 R11=000000000000fc0c R12=ffff888008d9f990 R13=ffff888008d9f978 R14=ffff888008d9f971 R15=ffff888008d9f930 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 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=00007f30f2c6f430 CR3=000000000d84e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0350b46acd2c71bb00000000000ae988 XMM05=71eef9d9a7d5429b00000000001330f0 XMM06=e7a3b750822471340000000000131c18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff8880146402f8 RCX=0000000080000000 RDX=ffff88800fffb680 RSI=ffffffff813bb862 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88801bb87d10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000001 R13=ffffffff84d308c0 R14=ffffffff87f95660 R15=0000000000000000 RIP=ffffffff814c0871 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 00007f259c390900 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=00007ffcbb3e6000 CR3=0000000013a6e000 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