[ 23.844654] BUG: Bad rss-counter state mm:00000000a60ac36c type:MM_FILEPAGES val:33 [ 23.845267] BUG: Bad rss-counter state mm:00000000a60ac36c type:MM_ANONPAGES val:22 [ 23.963935] ================================================================== [ 23.964760] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.965626] Read of size 8 at addr ffff888016f5e310 by task sshd/219 [ 23.966354] [ 23.966532] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.967342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.968092] Call Trace: [ 23.968365] [ 23.968598] dump_stack_lvl+0x91/0xf0 [ 23.969044] print_report+0xcc/0x620 [ 23.969424] ? __virt_addr_valid+0x102/0x340 [ 23.969872] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.970361] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.970836] kasan_report+0xbe/0xf0 [ 23.971226] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.971726] vma_interval_tree_remove+0xc75/0xec0 [ 23.972171] vma_prepare+0xc54/0x11a0 [ 23.972469] __split_vma+0x5af/0x950 [ 23.972750] ? __pfx___split_vma+0x10/0x10 [ 23.973055] ? find_held_lock+0x2c/0x110 [ 23.973350] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.973656] ? lock_is_held_type+0x9f/0x120 [ 23.973965] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.974297] ? mtree_range_walk+0x632/0x900 [ 23.974613] ? mas_walk+0x5c7/0x7c0 [ 23.974893] do_vmi_munmap+0x1f1/0x2b0 [ 23.975190] mmap_region+0x1f9/0x2660 [ 23.975475] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.975781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.976173] ? __pfx_lock_acquire+0x10/0x10 [ 23.976463] ? __pfx_mmap_region+0x10/0x10 [ 23.976756] ? security_mmap_addr+0x7d/0xa0 [ 23.977043] ? get_unmapped_area+0x1f5/0x3f0 [ 23.977340] do_mmap+0x854/0xf00 [ 23.977579] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.977847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.978148] ksys_mmap_pgoff+0x3af/0x500 [ 23.978430] do_syscall_64+0x3f/0x90 [ 23.978695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.979055] RIP: 0033:0x7fefb9d3dd82 [ 23.979333] 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 [ 23.980508] RSP: 002b:00007ffc78af6c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.980995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fefb9d3dd82 [ 23.981456] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fefb9177000 [ 23.981911] RBP: 00007fefb9177000 R08: 0000000000000009 R09: 0000000000001000 [ 23.982369] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563ba063f60 [ 23.982840] R13: 00007ffc78af6c30 R14: 00007ffc78af6c60 R15: 00007ffc78af6fc0 [ 23.983304] [ 23.983464] [ 23.983580] Allocated by task 207: [ 23.983817] kasan_save_stack+0x22/0x50 [ 23.984091] kasan_set_track+0x25/0x30 [ 23.984359] __kasan_slab_alloc+0x59/0x70 [ 23.984641] kmem_cache_alloc+0x16b/0x370 [ 23.984919] vm_area_dup+0x20/0x160 [ 23.985166] __split_vma+0x170/0x950 [ 23.985417] split_vma+0xc6/0x110 [ 23.985658] mprotect_fixup+0x8d2/0xb30 [ 23.985930] do_mprotect_pkey+0x87e/0xd40 [ 23.986209] __x64_sys_mprotect+0x78/0xc0 [ 23.986490] do_syscall_64+0x3f/0x90 [ 23.986747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.987093] [ 23.987214] Freed by task 13: [ 23.987420] kasan_save_stack+0x22/0x50 [ 23.987690] kasan_set_track+0x25/0x30 [ 23.987958] kasan_save_free_info+0x2b/0x50 [ 23.988246] __kasan_slab_free+0x10a/0x190 [ 23.988532] kmem_cache_free+0x10d/0x4d0 [ 23.988809] rcu_core+0x8c8/0x2860 [ 23.989053] __do_softirq+0x1b7/0x7d4 [ 23.989313] [ 23.989434] Last potentially related work creation: [ 23.989779] kasan_save_stack+0x22/0x50 [ 23.990071] __kasan_record_aux_stack+0x8e/0xa0 [ 23.990402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.990780] remove_vma+0x139/0x170 [ 23.991046] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.991383] do_vmi_munmap+0x1f1/0x2b0 [ 23.991662] __vm_munmap+0x138/0x3a0 [ 23.991934] __x64_sys_munmap+0x59/0x80 [ 23.992227] do_syscall_64+0x3f/0x90 [ 23.992509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.992879] [ 23.993000] The buggy address belongs to the object at ffff888016f5e2b8 [ 23.993000] which belongs to the cache vm_area_struct of size 168 [ 23.993863] The buggy address is located 88 bytes inside of [ 23.993863] freed 168-byte region [ffff888016f5e2b8, ffff888016f5e360) [ 23.994679] [ 23.994805] The buggy address belongs to the physical page: [ 23.995197] page:00000000c635af3f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f5e [ 23.995826] memcg:ffff88800ee7a801 [ 23.996072] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.996442] page_type: 0xffffffff() [ 23.996697] raw: 0100000000000200 ffff8880087a0c80 ffffea00003dedc0 dead000000000004 [ 23.997242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee7a801 [ 23.997776] page dumped because: kasan: bad access detected [ 23.998162] [ 23.998292] Memory state around the buggy address: [ 23.998637] ffff888016f5e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.999136] ffff888016f5e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.999639] >ffff888016f5e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.000139] ^ [ 24.000422] ffff888016f5e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.000933] ffff888016f5e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.001427] ================================================================== [ 24.001963] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.127098] BUG: Bad rss-counter state mm:000000009d882f9c type:MM_FILEPAGES val:33 [ 26.128091] BUG: Bad rss-counter state mm:000000009d882f9c type:MM_ANONPAGES val:22 [ 26.609027] BUG: Bad rss-counter state mm:00000000a4034cc4 type:MM_FILEPAGES val:33 [ 26.610024] BUG: Bad rss-counter state mm:00000000a4034cc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8208' (ECDSA) to the list of known hosts. 2023/06/20 14:16:04 fuzzer started 2023/06/20 14:16:04 dialing manager at localhost:36067 2023/06/20 14:16:04 checking machine... 2023/06/20 14:16:04 checking revisions... [ 27.314365] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:16:04 testing simple program... [ 27.367115] cgroup: Unknown subsys name 'net' [ 27.421553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:16:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180f5bb RCX=ffffffff86138e01 RDX=1ffff11003967f42 RSI=0000000000000000 RDI=ffffffff8180f5bb RBP=ffffffff8180f5bb RSP=ffff88801cb3f960 R8 =ffffffff86138eb4 R9 =ffff88801cb3f9f8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88801cb3fa80 R13=0000000000000000 R14=ffff8880145e1b40 R15=ffff88800dc1e980 RIP=ffffffff811fc6f7 RFL=00000296 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbc6c07a900 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=00007fbc6c6320b0 CR3=000000000ca88000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=ffff0000000000000000000000000000 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016e50001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016e4fa01 RSI=ffff888016e4fa00 RDI=ffff888016e4fa00 RBP=ffff888016e4f680 RSP=ffff888016e4f5b0 R8 =0000000000000001 R9 =ffff888016e4f668 R10=0000000000038001 R11=0000000000020c51 R12=ffff888016e4f688 R13=ffff888016e4f670 R14=ffff888016e4fa00 R15=ffff888016e4f628 RIP=ffffffff8112fbf0 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 00007f04dbfff700 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=00007fd8734b1450 CR3=000000000dc64000 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=2033303a36313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a36313a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000