[ 26.788751] BUG: Bad rss-counter state mm:0000000008295154 type:MM_FILEPAGES val:33 [ 26.788783] BUG: Bad rss-counter state mm:0000000008295154 type:MM_ANONPAGES val:22 [ 26.875927] ================================================================== [ 26.876397] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.876881] Read of size 8 at addr ffff88801658a5c8 by task sshd/218 [ 26.877272] [ 26.877384] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.877824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.878329] Call Trace: [ 26.878492] [ 26.878637] dump_stack_lvl+0x91/0xf0 [ 26.878890] print_report+0xcc/0x620 [ 26.879154] ? __virt_addr_valid+0x102/0x340 [ 26.879439] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.879753] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.880069] kasan_report+0xbe/0xf0 [ 26.880312] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.880631] vma_interval_tree_remove+0xc75/0xec0 [ 26.880937] vma_prepare+0xc54/0x11a0 [ 26.881184] __split_vma+0x5af/0x950 [ 26.881425] ? __pfx___split_vma+0x10/0x10 [ 26.881697] ? find_held_lock+0x2c/0x110 [ 26.881962] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.882258] ? lock_is_held_type+0x9f/0x120 [ 26.882534] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.882847] ? mtree_range_walk+0x632/0x900 [ 26.883135] ? mas_walk+0x5c7/0x7c0 [ 26.883379] do_vmi_munmap+0x1f1/0x2b0 [ 26.883632] mmap_region+0x1f9/0x2660 [ 26.883879] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.884142] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.884508] ? __pfx_lock_acquire+0x10/0x10 [ 26.884782] ? __pfx_mmap_region+0x10/0x10 [ 26.885051] ? security_mmap_addr+0x7d/0xa0 [ 26.885323] ? get_unmapped_area+0x1f5/0x3f0 [ 26.885607] do_mmap+0x854/0xf00 [ 26.885833] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.886087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.886373] ksys_mmap_pgoff+0x3af/0x500 [ 26.886634] do_syscall_64+0x3f/0x90 [ 26.886877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.887224] RIP: 0033:0x7f68b3446d82 [ 26.887457] 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 [ 26.888537] RSP: 002b:00007ffc971a09f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.888996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68b3446d82 [ 26.889424] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68b2880000 [ 26.889855] RBP: 00007f68b2880000 R08: 0000000000000009 R09: 0000000000001000 [ 26.890283] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575d6b89b20 [ 26.890712] R13: 00007ffc971a0a10 R14: 00007ffc971a0a40 R15: 00007ffc971a0da0 [ 26.891159] [ 26.891308] [ 26.891419] Allocated by task 206: [ 26.891640] kasan_save_stack+0x22/0x50 [ 26.891898] kasan_set_track+0x25/0x30 [ 26.892152] __kasan_slab_alloc+0x59/0x70 [ 26.892420] kmem_cache_alloc+0x16b/0x370 [ 26.892684] vm_area_dup+0x20/0x160 [ 26.892916] __split_vma+0x170/0x950 [ 26.893155] split_vma+0xc6/0x110 [ 26.893379] mprotect_fixup+0x8d2/0xb30 [ 26.893637] do_mprotect_pkey+0x87e/0xd40 [ 26.893904] __x64_sys_mprotect+0x78/0xc0 [ 26.894169] do_syscall_64+0x3f/0x90 [ 26.894412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.894738] [ 26.894848] Freed by task 110: [ 26.895066] kasan_save_stack+0x22/0x50 [ 26.895322] kasan_set_track+0x25/0x30 [ 26.895574] kasan_save_free_info+0x2b/0x50 [ 26.895846] __kasan_slab_free+0x10a/0x190 [ 26.896118] kmem_cache_free+0x10d/0x4d0 [ 26.896378] rcu_core+0x8c8/0x2860 [ 26.896604] __do_softirq+0x1b7/0x7d4 [ 26.896849] [ 26.896958] Last potentially related work creation: [ 26.897256] kasan_save_stack+0x22/0x50 [ 26.897511] __kasan_record_aux_stack+0x8e/0xa0 [ 26.897803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.898129] remove_vma+0x139/0x170 [ 26.898362] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.898648] do_vmi_munmap+0x1f1/0x2b0 [ 26.898896] __vm_munmap+0x138/0x3a0 [ 26.899141] __x64_sys_munmap+0x59/0x80 [ 26.899395] do_syscall_64+0x3f/0x90 [ 26.899636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.899963] [ 26.900073] Second to last potentially related work creation: [ 26.900420] kasan_save_stack+0x22/0x50 [ 26.900679] __kasan_record_aux_stack+0x8e/0xa0 [ 26.900972] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.901299] remove_vma+0x139/0x170 [ 26.901530] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.901816] do_vmi_munmap+0x1f1/0x2b0 [ 26.902062] mmap_region+0x1f9/0x2660 [ 26.902304] do_mmap+0x854/0xf00 [ 26.902525] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.902773] ksys_mmap_pgoff+0x3af/0x500 [ 26.903032] do_syscall_64+0x3f/0x90 [ 26.903276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.903601] [ 26.903711] The buggy address belongs to the object at ffff88801658a570 [ 26.903711] which belongs to the cache vm_area_struct of size 168 [ 26.904459] The buggy address is located 88 bytes inside of [ 26.904459] freed 168-byte region [ffff88801658a570, ffff88801658a618) [ 26.905168] [ 26.905170] The buggy address belongs to the physical page: [ 26.905175] page:00000000d16dc1ee refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801658a1d0 pfn:0x1658a [ 26.905193] memcg:ffff88800eb7e701 [ 26.905198] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.905211] page_type: 0xffffffff() [ 26.905224] raw: 0100000000000200 ffff88800879fc80 ffffea00003574d0 ffffea0000394c90 [ 26.905239] raw: ffff88801658a1d0 0000000000110007 00000001ffffffff ffff88800eb7e701 [ 26.905247] page dumped because: kasan: bad access detected [ 26.905252] [ 26.905254] Memory state around the buggy address: [ 26.905260] ffff88801658a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.905270] ffff88801658a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 26.905280] >ffff88801658a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.905287] ^ [ 26.905294] ffff88801658a600: fb fb fb fc fc fc fc fc fc fc fc fb fb fb fb fb [ 26.905304] ffff88801658a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.905312] ================================================================== [ 26.905395] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.907644] BUG: Bad rss-counter state mm:00000000987d0aed type:MM_FILEPAGES val:33 [ 28.908659] BUG: Bad rss-counter state mm:00000000987d0aed type:MM_ANONPAGES val:22 [ 29.380283] BUG: Bad rss-counter state mm:000000007f0b73d6 type:MM_FILEPAGES val:33 [ 29.381322] BUG: Bad rss-counter state mm:000000007f0b73d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50849' (ECDSA) to the list of known hosts. 2023/06/19 15:16:00 fuzzer started 2023/06/19 15:16:00 dialing manager at localhost:44161 2023/06/19 15:16:00 checking machine... 2023/06/19 15:16:00 checking revisions... [ 30.086154] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:16:01 testing simple program... [ 30.135177] cgroup: Unknown subsys name 'net' [ 30.185013] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:15:57 Registers: info registers vcpu 0 RAX=ffffffff818e03a4 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f13fb01 RSI=ffff88800f13fb38 RDI=ffff88800f13fb38 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff8614c362 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000024543 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800f13fb40 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 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 00007f43a3fff700 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=00007f57e0a41f40 CR3=00000000165f0000 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=2030303a36313a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000123492b5d8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000012 RSI=ffff88806cf28140 RDI=00000000000534c8 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee71c R11=0000000000000001 R12=00000000000534c8 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000016 [----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 00007f3c691da900 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=00007ffe124e9000 CR3=000000000cb8e000 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