[ 41.348538] BUG: Bad rss-counter state mm:000000005d3e8408 type:MM_FILEPAGES val:33 [ 41.350618] BUG: Bad rss-counter state mm:000000005d3e8408 type:MM_ANONPAGES val:22 [ 41.523669] ================================================================== [ 41.524516] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.525391] Read of size 8 at addr ffff88800f0af798 by task sshd/218 [ 41.526107] [ 41.526315] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.527231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.528152] Call Trace: [ 41.528454] [ 41.528747] dump_stack_lvl+0x91/0xf0 [ 41.529225] print_report+0xcc/0x620 [ 41.529709] ? __virt_addr_valid+0x102/0x340 [ 41.530251] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.530864] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.531486] kasan_report+0xbe/0xf0 [ 41.531960] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.532572] vma_interval_tree_remove+0xc75/0xec0 [ 41.533170] vma_prepare+0xc54/0x11a0 [ 41.533641] __split_vma+0x5af/0x950 [ 41.534107] ? __pfx___split_vma+0x10/0x10 [ 41.534626] ? find_held_lock+0x2c/0x110 [ 41.535148] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.535709] ? lock_is_held_type+0x9f/0x120 [ 41.536234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.536836] ? mtree_range_walk+0x632/0x900 [ 41.537381] ? mas_walk+0x5c7/0x7c0 [ 41.537846] do_vmi_munmap+0x1f1/0x2b0 [ 41.538334] mmap_region+0x1f9/0x2660 [ 41.538801] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.539303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.540032] ? __pfx_lock_acquire+0x10/0x10 [ 41.540567] ? __pfx_mmap_region+0x10/0x10 [ 41.541087] ? security_mmap_addr+0x7d/0xa0 [ 41.541613] ? get_unmapped_area+0x1f5/0x3f0 [ 41.542158] do_mmap+0x854/0xf00 [ 41.542594] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.543088] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.543645] ksys_mmap_pgoff+0x3af/0x500 [ 41.544149] do_syscall_64+0x3f/0x90 [ 41.544628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.545264] RIP: 0033:0x7f5b7420fd82 [ 41.545707] 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 [ 41.547792] RSP: 002b:00007ffc86477f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.548670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b7420fd82 [ 41.549512] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b73649000 [ 41.550353] RBP: 00007f5b73649000 R08: 0000000000000009 R09: 0000000000001000 [ 41.551192] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563413f92ec0 [ 41.552034] R13: 00007ffc86477fa0 R14: 00007ffc86477fd0 R15: 00007ffc86478330 [ 41.552887] [ 41.553179] [ 41.553392] Allocated by task 211: [ 41.553818] kasan_save_stack+0x22/0x50 [ 41.554313] kasan_set_track+0x25/0x30 [ 41.554791] __kasan_slab_alloc+0x59/0x70 [ 41.555310] kmem_cache_alloc+0x16b/0x370 [ 41.555825] vm_area_dup+0x20/0x160 [ 41.556263] __split_vma+0x170/0x950 [ 41.556717] split_vma+0xc6/0x110 [ 41.557147] mprotect_fixup+0x8d2/0xb30 [ 41.557625] do_mprotect_pkey+0x87e/0xd40 [ 41.558131] __x64_sys_mprotect+0x78/0xc0 [ 41.558636] do_syscall_64+0x3f/0x90 [ 41.559105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.559728] [ 41.559939] Freed by task 211: [ 41.560320] kasan_save_stack+0x22/0x50 [ 41.560824] kasan_set_track+0x25/0x30 [ 41.561307] kasan_save_free_info+0x2b/0x50 [ 41.561818] __kasan_slab_free+0x10a/0x190 [ 41.562344] kmem_cache_free+0x10d/0x4d0 [ 41.562840] rcu_core+0x8c8/0x2860 [ 41.563285] __do_softirq+0x1b7/0x7d4 [ 41.563754] [ 41.563961] Last potentially related work creation: [ 41.564547] kasan_save_stack+0x22/0x50 [ 41.565046] __kasan_record_aux_stack+0x8e/0xa0 [ 41.565610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.566249] remove_vma+0x139/0x170 [ 41.566686] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.567246] do_vmi_munmap+0x1f1/0x2b0 [ 41.567724] __vm_munmap+0x138/0x3a0 [ 41.568178] __x64_sys_munmap+0x59/0x80 [ 41.568669] do_syscall_64+0x3f/0x90 [ 41.569132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.569764] [ 41.569975] The buggy address belongs to the object at ffff88800f0af740 [ 41.569975] which belongs to the cache vm_area_struct of size 168 [ 41.571406] The buggy address is located 88 bytes inside of [ 41.571406] freed 168-byte region [ffff88800f0af740, ffff88800f0af7e8) [ 41.572786] [ 41.572998] The buggy address belongs to the physical page: [ 41.573650] page:00000000fca68918 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0af [ 41.574715] memcg:ffff88800fb67901 [ 41.575135] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.575819] page_type: 0xffffffff() [ 41.576268] raw: 0100000000000200 ffff88800879fc80 ffffea0000608f40 0000000000000005 [ 41.577178] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb67901 [ 41.578068] page dumped because: kasan: bad access detected [ 41.578712] [ 41.578921] Memory state around the buggy address: [ 41.579499] ffff88800f0af680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.580347] ffff88800f0af700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 41.581202] >ffff88800f0af780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.582052] ^ [ 41.582532] ffff88800f0af800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 41.583377] ffff88800f0af880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 41.584213] ================================================================== [ 41.585153] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.451534] BUG: Bad rss-counter state mm:00000000914725dc type:MM_FILEPAGES val:33 [ 43.452539] BUG: Bad rss-counter state mm:00000000914725dc type:MM_ANONPAGES val:22 [ 43.955425] BUG: Bad rss-counter state mm:00000000e4966a1d type:MM_FILEPAGES val:33 [ 43.956364] BUG: Bad rss-counter state mm:00000000e4966a1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19294' (ECDSA) to the list of known hosts. 2023/06/19 19:33:22 fuzzer started 2023/06/19 19:33:22 dialing manager at localhost:44161 2023/06/19 19:33:22 checking machine... 2023/06/19 19:33:22 checking revisions... [ 44.659676] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:33:23 testing simple program... [ 44.701772] cgroup: Unknown subsys name 'net' [ 44.761537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:33:12 Registers: info registers vcpu 0 RAX=1ffff1100192bd8f RBX=ffff88800c95ec48 RCX=1ffff1100192cbdc RDX=dffffc0000000000 RSI=ffff88800c9681d0 RDI=ffff88800c95ec78 RBP=ffff88800c9349f8 RSP=ffff888014727a28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800c968000 R13=0000000000000000 R14=ffff88800e90e178 R15=ffff88800e90e130 RIP=ffffffff818474fe 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 00007fe280deb900 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=00007fe28021e100 CR3=000000000d86e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c04bfa7771065efe00000000000ae988 XMM05=9bc6ae4f9c6922b100000000001356b8 XMM06=12d59c966b95577900000000001340e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff84601449 RDX=dffffc0000000000 RSI=ffffffff8460144a RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113071f 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 00007fda594eb900 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=00007fda594ca020 CR3=000000000c592000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000