[ 67.412768] BUG: Bad rss-counter state mm:000000003bbf9966 type:MM_FILEPAGES val:33 [ 67.413996] BUG: Bad rss-counter state mm:000000003bbf9966 type:MM_ANONPAGES val:22 [ 67.543816] ================================================================== [ 67.544704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.545647] Read of size 8 at addr ffff88800947b310 by task sshd/220 [ 67.546425] [ 67.546643] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.547773] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.548755] Call Trace: [ 67.549082] [ 67.549362] dump_stack_lvl+0x91/0xf0 [ 67.549871] print_report+0xcc/0x620 [ 67.550355] ? __virt_addr_valid+0x102/0x340 [ 67.550928] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.551554] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.552163] kasan_report+0xbe/0xf0 [ 67.552640] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.553271] vma_interval_tree_remove+0xc75/0xec0 [ 67.553876] vma_prepare+0xc54/0x11a0 [ 67.554360] __split_vma+0x5af/0x950 [ 67.554852] ? __pfx___split_vma+0x10/0x10 [ 67.555383] ? find_held_lock+0x2c/0x110 [ 67.555906] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.556470] ? lock_is_held_type+0x9f/0x120 [ 67.557011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.557615] ? mtree_range_walk+0x632/0x900 [ 67.558167] ? mas_walk+0x5c7/0x7c0 [ 67.558661] do_vmi_munmap+0x1f1/0x2b0 [ 67.559156] mmap_region+0x1f9/0x2660 [ 67.559645] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.560155] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.560868] ? __pfx_lock_acquire+0x10/0x10 [ 67.561400] ? __pfx_mmap_region+0x10/0x10 [ 67.561938] ? security_mmap_addr+0x7d/0xa0 [ 67.562476] ? get_unmapped_area+0x1f5/0x3f0 [ 67.563021] do_mmap+0x854/0xf00 [ 67.563454] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.563951] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.564522] ksys_mmap_pgoff+0x3af/0x500 [ 67.565024] do_syscall_64+0x3f/0x90 [ 67.565513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.566158] RIP: 0033:0x7fd965cebd82 [ 67.566623] 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 [ 67.568745] RSP: 002b:00007ffe72ade058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.569650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd965cebd82 [ 67.570514] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd965125000 [ 67.571349] RBP: 00007fd965125000 R08: 0000000000000009 R09: 0000000000001000 [ 67.572186] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d612dfec0 [ 67.573032] R13: 00007ffe72ade070 R14: 00007ffe72ade0a0 R15: 00007ffe72ade400 [ 67.573894] [ 67.574186] [ 67.574408] Allocated by task 213: [ 67.574835] kasan_save_stack+0x22/0x50 [ 67.575338] kasan_set_track+0x25/0x30 [ 67.575834] __kasan_slab_alloc+0x59/0x70 [ 67.576364] kmem_cache_alloc+0x16b/0x370 [ 67.576884] vm_area_dup+0x20/0x160 [ 67.577343] __split_vma+0x170/0x950 [ 67.577810] split_vma+0xc6/0x110 [ 67.578246] mprotect_fixup+0x8d2/0xb30 [ 67.578764] do_mprotect_pkey+0x87e/0xd40 [ 67.579286] __x64_sys_mprotect+0x78/0xc0 [ 67.579803] do_syscall_64+0x3f/0x90 [ 67.580280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.580913] [ 67.581127] Freed by task 213: [ 67.581515] kasan_save_stack+0x22/0x50 [ 67.582016] kasan_set_track+0x25/0x30 [ 67.582523] kasan_save_free_info+0x2b/0x50 [ 67.583057] __kasan_slab_free+0x10a/0x190 [ 67.583590] kmem_cache_free+0x10d/0x4d0 [ 67.584098] rcu_core+0x8c8/0x2860 [ 67.584539] __do_softirq+0x1b7/0x7d4 [ 67.585020] [ 67.585238] Last potentially related work creation: [ 67.585818] kasan_save_stack+0x22/0x50 [ 67.586335] __kasan_record_aux_stack+0x8e/0xa0 [ 67.586934] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.587584] remove_vma+0x139/0x170 [ 67.588033] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.588600] do_vmi_munmap+0x1f1/0x2b0 [ 67.589091] __vm_munmap+0x138/0x3a0 [ 67.589564] __x64_sys_munmap+0x59/0x80 [ 67.590072] do_syscall_64+0x3f/0x90 [ 67.590552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.591201] [ 67.591423] The buggy address belongs to the object at ffff88800947b2b8 [ 67.591423] which belongs to the cache vm_area_struct of size 168 [ 67.592900] The buggy address is located 88 bytes inside of [ 67.592900] freed 168-byte region [ffff88800947b2b8, ffff88800947b360) [ 67.594351] [ 67.594586] The buggy address belongs to the physical page: [ 67.595261] page:000000009b402412 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x947b [ 67.596353] memcg:ffff888009881301 [ 67.596779] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 67.597484] page_type: 0xffffffff() [ 67.597936] raw: 0100000000000200 ffff88800879fc80 ffffea0000258640 dead000000000003 [ 67.598858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009881301 [ 67.599767] page dumped because: kasan: bad access detected [ 67.600422] [ 67.600636] Memory state around the buggy address: [ 67.601216] ffff88800947b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 67.602066] ffff88800947b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 67.602935] >ffff88800947b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 67.603787] ^ [ 67.604254] ffff88800947b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.605107] ffff88800947b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 67.605953] ================================================================== [ 67.606949] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 69.457629] BUG: Bad rss-counter state mm:00000000e3240091 type:MM_FILEPAGES val:33 [ 69.459046] BUG: Bad rss-counter state mm:00000000e3240091 type:MM_ANONPAGES val:22 [ 69.966720] BUG: Bad rss-counter state mm:0000000025514beb type:MM_FILEPAGES val:33 [ 69.967666] BUG: Bad rss-counter state mm:0000000025514beb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25457' (ECDSA) to the list of known hosts. 2023/06/19 23:17:59 fuzzer started 2023/06/19 23:17:59 dialing manager at localhost:44161 2023/06/19 23:17:59 checking machine... 2023/06/19 23:17:59 checking revisions... [ 70.706750] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:17:59 testing simple program... [ 70.755285] cgroup: Unknown subsys name 'net' [ 70.810292] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:17:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801465fa40 RCX=0000000000000001 RDX=1ffff110028cbf49 RSI=ffffffff81807ebb RDI=ffff88801465fa48 RBP=0000000000000003 RSP=ffff88801465f958 R8 =0000000000000001 R9 =ffff88801465f9b8 R10=0000000000038001 R11=0000000000020de7 R12=ffff88801465fa40 R13=0000000000000000 R14=ffff88800fe0d1c0 R15=0000000000000d40 RIP=ffffffff813ad485 RFL=00000287 [--S--PC] 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 00007f825cdfa900 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=00007f825d3af650 CR3=0000000017212000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007eff84099000 CR3=000000000fca8000 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=2039353a37313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a37313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000