syzkaller login: [ 31.696688] BUG: Bad rss-counter state mm:00000000cc030d64 type:MM_FILEPAGES val:33 [ 31.698310] BUG: Bad rss-counter state mm:00000000cc030d64 type:MM_ANONPAGES val:22 [ 31.887382] ================================================================== [ 31.888527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.889712] Read of size 8 at addr ffff88800ea4ec20 by task sshd/220 [ 31.890609] [ 31.890832] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.891693] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.892683] Call Trace: [ 31.893003] [ 31.893292] dump_stack_lvl+0x91/0xf0 [ 31.893805] print_report+0xcc/0x620 [ 31.894291] ? __virt_addr_valid+0x102/0x340 [ 31.894846] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.895468] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.896095] kasan_report+0xbe/0xf0 [ 31.896575] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.897198] vma_interval_tree_remove+0xc75/0xec0 [ 31.897806] vma_prepare+0xc54/0x11a0 [ 31.898282] __split_vma+0x5af/0x950 [ 31.898763] ? __pfx___split_vma+0x10/0x10 [ 31.899301] ? find_held_lock+0x2c/0x110 [ 31.899819] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.900396] ? lock_is_held_type+0x9f/0x120 [ 31.900937] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.901566] ? mtree_range_walk+0x632/0x900 [ 31.902133] ? mas_walk+0x5c7/0x7c0 [ 31.902622] do_vmi_munmap+0x1f1/0x2b0 [ 31.903115] mmap_region+0x1f9/0x2660 [ 31.903615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.904135] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.904857] ? __pfx_lock_acquire+0x10/0x10 [ 31.905389] ? __pfx_mmap_region+0x10/0x10 [ 31.905935] ? security_mmap_addr+0x7d/0xa0 [ 31.906472] ? get_unmapped_area+0x1f5/0x3f0 [ 31.907020] do_mmap+0x854/0xf00 [ 31.907469] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.907965] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.908537] ksys_mmap_pgoff+0x3af/0x500 [ 31.909046] do_syscall_64+0x3f/0x90 [ 31.909535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.910407] RIP: 0033:0x7fa15e3d9d82 [ 31.910972] 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 [ 31.913085] RSP: 002b:00007fff9229be38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.914012] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa15e3d9d82 [ 31.914865] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa15d813000 [ 31.915720] RBP: 00007fa15d813000 R08: 0000000000000009 R09: 0000000000001000 [ 31.916575] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562db8685d90 [ 31.917432] R13: 00007fff9229be50 R14: 00007fff9229be80 R15: 00007fff9229c1e0 [ 31.918303] [ 31.918603] [ 31.918823] Allocated by task 213: [ 31.919259] kasan_save_stack+0x22/0x50 [ 31.919763] kasan_set_track+0x25/0x30 [ 31.920255] __kasan_slab_alloc+0x59/0x70 [ 31.920787] kmem_cache_alloc+0x16b/0x370 [ 31.921314] vm_area_dup+0x20/0x160 [ 31.921801] __split_vma+0x170/0x950 [ 31.922267] split_vma+0xc6/0x110 [ 31.922713] mprotect_fixup+0x8d2/0xb30 [ 31.923234] do_mprotect_pkey+0x87e/0xd40 [ 31.923752] __x64_sys_mprotect+0x78/0xc0 [ 31.924278] do_syscall_64+0x3f/0x90 [ 31.924757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.925408] [ 31.925632] Freed by task 213: [ 31.926025] kasan_save_stack+0x22/0x50 [ 31.926527] kasan_set_track+0x25/0x30 [ 31.927029] kasan_save_free_info+0x2b/0x50 [ 31.927558] __kasan_slab_free+0x10a/0x190 [ 31.928091] kmem_cache_free+0x10d/0x4d0 [ 31.928598] rcu_core+0x8c8/0x2860 [ 31.929043] __do_softirq+0x1b7/0x7d4 [ 31.929525] [ 31.929752] Last potentially related work creation: [ 31.930343] kasan_save_stack+0x22/0x50 [ 31.930855] __kasan_record_aux_stack+0x8e/0xa0 [ 31.931433] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.932074] remove_vma+0x139/0x170 [ 31.932530] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.933085] do_vmi_munmap+0x1f1/0x2b0 [ 31.933586] __vm_munmap+0x138/0x3a0 [ 31.934054] __x64_sys_munmap+0x59/0x80 [ 31.934560] do_syscall_64+0x3f/0x90 [ 31.935043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.935696] [ 31.935918] The buggy address belongs to the object at ffff88800ea4ebc8 [ 31.935918] which belongs to the cache vm_area_struct of size 168 [ 31.937392] The buggy address is located 88 bytes inside of [ 31.937392] freed 168-byte region [ffff88800ea4ebc8, ffff88800ea4ec70) [ 31.938801] [ 31.939016] The buggy address belongs to the physical page: [ 31.939674] page:00000000d4f0a303 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea4e [ 31.940759] memcg:ffff88800f6e4f01 [ 31.941196] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.941853] page_type: 0xffffffff() [ 31.942303] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.943287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6e4f01 [ 31.944192] page dumped because: kasan: bad access detected [ 31.944866] [ 31.945091] Memory state around the buggy address: [ 31.945693] ffff88800ea4eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.946562] ffff88800ea4eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.947422] >ffff88800ea4ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.948276] ^ [ 31.948811] ffff88800ea4ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.949678] ffff88800ea4ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.950533] ================================================================== [ 31.951504] Disabling lock debugging due to kernel taint [ 33.921686] BUG: Bad rss-counter state mm:0000000051e7c7cf type:MM_FILEPAGES val:33 [ 33.923206] BUG: Bad rss-counter state mm:0000000051e7c7cf type:MM_ANONPAGES val:22 [ 34.457828] BUG: Bad rss-counter state mm:00000000d4659ce8 type:MM_FILEPAGES val:33 [ 34.459012] BUG: Bad rss-counter state mm:00000000d4659ce8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10367' (ECDSA) to the list of known hosts. 2023/06/21 00:54:11 fuzzer started 2023/06/21 00:54:11 dialing manager at localhost:36067 2023/06/21 00:54:11 checking machine... 2023/06/21 00:54:11 checking revisions... [ 35.198330] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:54:11 testing simple program... [ 35.243026] cgroup: Unknown subsys name 'net' [ 35.297832] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:54:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880100b51c0 RSI=ffffffff81ef7198 RDI=ffffffff87f42610 RBP=0000000000000001 RSP=ffff88801464f6b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888008e628f0 R13=0000000000000005 R14=0000000000000001 R15=ffff88801464f760 RIP=ffffffff81ef71a3 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 00007f4d1fd53900 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=00007f4d1f1b1c80 CR3=000000000db78000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=d3b423ee459ea45800000000000ae988 XMM05=a2513d7fb9911e890000000000132310 XMM06=19e9129bd510f23500000000001311a8 XMM07=fb795ef6d657705600000000001213e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c9ccf7 RBX=ffff88800e4e6788 RCX=1ffff11001c3d860 RDX=dffffc0000000000 RSI=ffff888019c1b0e8 RDI=ffff88800e4e67b8 RBP=ffff88800e1ec2d0 RSP=ffff88801a00f6b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888019c1b000 R13=0000000000000000 R14=ffff88800ab112a8 R15=ffff88800ab11260 RIP=ffffffff8184767e RFL=00000046 [---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 00007f5f62491900 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=00007ffeeafc9000 CR3=0000000016744000 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