syzkaller login: [ 38.712482] BUG: Bad rss-counter state mm:000000004d133d29 type:MM_FILEPAGES val:33 [ 38.713894] BUG: Bad rss-counter state mm:000000004d133d29 type:MM_ANONPAGES val:22 [ 38.874757] ================================================================== [ 38.875748] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.876846] Read of size 8 at addr ffff88801a811c20 by task sshd/219 [ 38.877681] [ 38.877910] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.878824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.879846] Call Trace: [ 38.880182] [ 38.880478] dump_stack_lvl+0x91/0xf0 [ 38.880989] print_report+0xcc/0x620 [ 38.881495] ? __virt_addr_valid+0x102/0x340 [ 38.882086] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882750] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.883387] kasan_report+0xbe/0xf0 [ 38.883889] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.884534] vma_interval_tree_remove+0xc75/0xec0 [ 38.885163] vma_prepare+0xc54/0x11a0 [ 38.885690] __split_vma+0x5af/0x950 [ 38.886186] ? __pfx___split_vma+0x10/0x10 [ 38.886737] ? find_held_lock+0x2c/0x110 [ 38.887279] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.887862] ? lock_is_held_type+0x9f/0x120 [ 38.888426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.889081] ? mtree_range_walk+0x632/0x900 [ 38.889694] ? mas_walk+0x5c7/0x7c0 [ 38.890195] do_vmi_munmap+0x1f1/0x2b0 [ 38.890708] mmap_region+0x1f9/0x2660 [ 38.891219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.891753] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.892497] ? __pfx_lock_acquire+0x10/0x10 [ 38.893055] ? __pfx_mmap_region+0x10/0x10 [ 38.893621] ? security_mmap_addr+0x7d/0xa0 [ 38.894165] ? get_unmapped_area+0x1f5/0x3f0 [ 38.894756] do_mmap+0x854/0xf00 [ 38.895221] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.895752] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.896345] ksys_mmap_pgoff+0x3af/0x500 [ 38.896871] do_syscall_64+0x3f/0x90 [ 38.897365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.898037] RIP: 0033:0x7f65f6834d82 [ 38.898520] 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 [ 38.900756] RSP: 002b:00007ffe6359ea88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.901736] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65f6834d82 [ 38.902643] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f65f5c6e000 [ 38.903537] RBP: 00007f65f5c6e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.904432] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560aeecb1b20 [ 38.905322] R13: 00007ffe6359eaa0 R14: 00007ffe6359ead0 R15: 00007ffe6359ee30 [ 38.906231] [ 38.906538] [ 38.906765] Allocated by task 212: [ 38.907206] kasan_save_stack+0x22/0x50 [ 38.907746] kasan_set_track+0x25/0x30 [ 38.908259] __kasan_slab_alloc+0x59/0x70 [ 38.908809] kmem_cache_alloc+0x16b/0x370 [ 38.909346] vm_area_dup+0x20/0x160 [ 38.909843] __split_vma+0x170/0x950 [ 38.910341] split_vma+0xc6/0x110 [ 38.910795] mprotect_fixup+0x8d2/0xb30 [ 38.911323] do_mprotect_pkey+0x87e/0xd40 [ 38.911862] __x64_sys_mprotect+0x78/0xc0 [ 38.912403] do_syscall_64+0x3f/0x90 [ 38.912911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913611] [ 38.913842] Freed by task 212: [ 38.914257] kasan_save_stack+0x22/0x50 [ 38.914789] kasan_set_track+0x25/0x30 [ 38.915307] kasan_save_free_info+0x2b/0x50 [ 38.915861] __kasan_slab_free+0x10a/0x190 [ 38.916430] kmem_cache_free+0x10d/0x4d0 [ 38.916962] rcu_core+0x8c8/0x2860 [ 38.917576] __do_softirq+0x1b7/0x7d4 [ 38.918171] [ 38.918430] Last potentially related work creation: [ 38.919120] kasan_save_stack+0x22/0x50 [ 38.919719] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.921162] remove_vma+0x139/0x170 [ 38.921712] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922377] do_vmi_munmap+0x1f1/0x2b0 [ 38.922901] __vm_munmap+0x138/0x3a0 [ 38.923371] __x64_sys_munmap+0x59/0x80 [ 38.923871] do_syscall_64+0x3f/0x90 [ 38.924348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924991] [ 38.925209] The buggy address belongs to the object at ffff88801a811bc8 [ 38.925209] which belongs to the cache vm_area_struct of size 168 [ 38.926695] The buggy address is located 88 bytes inside of [ 38.926695] freed 168-byte region [ffff88801a811bc8, ffff88801a811c70) [ 38.928102] [ 38.928321] The buggy address belongs to the physical page: [ 38.928981] page:00000000fd03761a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a811 [ 38.930074] memcg:ffff88801a810101 [ 38.930504] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.931200] page_type: 0xffffffff() [ 38.931653] raw: 0100000000000200 ffff8880087a0c80 ffffea00006a0240 000000000000000d [ 38.932566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a810101 [ 38.933462] page dumped because: kasan: bad access detected [ 38.934129] [ 38.934347] Memory state around the buggy address: [ 38.934926] ffff88801a811b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.935779] ffff88801a811b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.936627] >ffff88801a811c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.937473] ^ [ 38.938016] ffff88801a811c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.938866] ffff88801a811d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.939739] ================================================================== [ 38.940744] Disabling lock debugging due to kernel taint [ 41.298429] BUG: Bad rss-counter state mm:000000002d95d212 type:MM_FILEPAGES val:33 [ 41.300058] BUG: Bad rss-counter state mm:000000002d95d212 type:MM_ANONPAGES val:22 [ 41.786469] BUG: Bad rss-counter state mm:000000006e485da3 type:MM_FILEPAGES val:33 [ 41.787568] BUG: Bad rss-counter state mm:000000006e485da3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21138' (ECDSA) to the list of known hosts. 2023/06/20 15:51:25 fuzzer started 2023/06/20 15:51:25 dialing manager at localhost:36067 2023/06/20 15:51:25 checking machine... 2023/06/20 15:51:25 checking revisions... [ 42.528661] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:51:25 testing simple program... [ 42.572533] cgroup: Unknown subsys name 'net' [ 42.611696] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:51:25 Registers: info registers vcpu 0 RAX=ffffffff810bd090 RBX=ffffffff85d899fc RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888016f1f300 R8 =ffffffff8608a556 R9 =ffff888016f1f448 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a00 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000283 [--S---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 00007effe2577700 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=00007ffe6396a438 CR3=0000000019f7c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732035323a3135 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343135 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff1100d9e135e RSI=ffffffff8180c6a2 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff860d825a R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880167451c0 R15=ffff88800dd1a700 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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 00007f71a6241900 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=00007f71a67f8618 CR3=000000000d6ca000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000