[ 31.769955] BUG: Bad rss-counter state mm:0000000054ae3ad3 type:MM_FILEPAGES val:33 [ 31.771490] BUG: Bad rss-counter state mm:0000000054ae3ad3 type:MM_ANONPAGES val:22 [ 31.939283] ================================================================== [ 31.940345] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.941466] Read of size 8 at addr ffff88801a1214e0 by task sshd/226 [ 31.942415] [ 31.942632] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.943510] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.944514] Call Trace: [ 31.944841] [ 31.945127] dump_stack_lvl+0x91/0xf0 [ 31.945631] print_report+0xcc/0x620 [ 31.946117] ? __virt_addr_valid+0x102/0x340 [ 31.946673] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.947305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.947920] kasan_report+0xbe/0xf0 [ 31.948407] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.949040] vma_interval_tree_remove+0xc75/0xec0 [ 31.949647] vma_prepare+0xc54/0x11a0 [ 31.950130] __split_vma+0x5af/0x950 [ 31.950603] ? __pfx___split_vma+0x10/0x10 [ 31.951129] ? find_held_lock+0x2c/0x110 [ 31.951681] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.952248] ? lock_is_held_type+0x9f/0x120 [ 31.952789] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.953413] ? mtree_range_walk+0x632/0x900 [ 31.953977] ? mas_walk+0x5c7/0x7c0 [ 31.954455] do_vmi_munmap+0x1f1/0x2b0 [ 31.954945] mmap_region+0x1f9/0x2660 [ 31.955432] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.955944] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.956660] ? __pfx_lock_acquire+0x10/0x10 [ 31.957194] ? __pfx_mmap_region+0x10/0x10 [ 31.957727] ? security_mmap_addr+0x7d/0xa0 [ 31.958261] ? get_unmapped_area+0x1f5/0x3f0 [ 31.958809] do_mmap+0x854/0xf00 [ 31.959259] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.959755] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.960324] ksys_mmap_pgoff+0x3af/0x500 [ 31.960842] do_syscall_64+0x3f/0x90 [ 31.961320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.961965] RIP: 0033:0x7f8951d19d82 [ 31.962428] 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 [ 31.964591] RSP: 002b:00007fff0c834a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.965485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8951d19d82 [ 31.966338] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8951153000 [ 31.967187] RBP: 00007f8951153000 R08: 0000000000000009 R09: 0000000000001000 [ 31.968045] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562688a9fec0 [ 31.968890] R13: 00007fff0c834a70 R14: 00007fff0c834aa0 R15: 00007fff0c834e00 [ 31.969745] [ 31.970043] [ 31.970257] Allocated by task 211: [ 31.970681] kasan_save_stack+0x22/0x50 [ 31.971183] kasan_set_track+0x25/0x30 [ 31.971700] __kasan_slab_alloc+0x59/0x70 [ 31.972223] kmem_cache_alloc+0x16b/0x370 [ 31.972747] vm_area_dup+0x20/0x160 [ 31.973203] __split_vma+0x170/0x950 [ 31.973667] split_vma+0xc6/0x110 [ 31.974109] mprotect_fixup+0x8d2/0xb30 [ 31.974609] do_mprotect_pkey+0x87e/0xd40 [ 31.975128] __x64_sys_mprotect+0x78/0xc0 [ 31.975655] do_syscall_64+0x3f/0x90 [ 31.976131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.976783] [ 31.977011] Freed by task 211: [ 31.977412] kasan_save_stack+0x22/0x50 [ 31.977919] kasan_set_track+0x25/0x30 [ 31.978421] kasan_save_free_info+0x2b/0x50 [ 31.978963] __kasan_slab_free+0x10a/0x190 [ 31.979519] kmem_cache_free+0x10d/0x4d0 [ 31.980052] rcu_core+0x8c8/0x2860 [ 31.980501] __do_softirq+0x1b7/0x7d4 [ 31.980982] [ 31.981196] Last potentially related work creation: [ 31.981784] kasan_save_stack+0x22/0x50 [ 31.982296] __kasan_record_aux_stack+0x8e/0xa0 [ 31.982926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.983586] remove_vma+0x139/0x170 [ 31.984044] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.984598] do_vmi_munmap+0x1f1/0x2b0 [ 31.985088] __vm_munmap+0x138/0x3a0 [ 31.985560] __x64_sys_munmap+0x59/0x80 [ 31.986053] do_syscall_64+0x3f/0x90 [ 31.986528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.987176] [ 31.987412] The buggy address belongs to the object at ffff88801a121488 [ 31.987412] which belongs to the cache vm_area_struct of size 168 [ 31.988869] The buggy address is located 88 bytes inside of [ 31.988869] freed 168-byte region [ffff88801a121488, ffff88801a121530) [ 31.990257] [ 31.990476] The buggy address belongs to the physical page: [ 31.991132] page:00000000c3bd3bd6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a121 [ 31.992241] memcg:ffff88801a11fa01 [ 31.992666] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.993307] page_type: 0xffffffff() [ 31.993755] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.994662] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a11fa01 [ 31.995570] page dumped because: kasan: bad access detected [ 31.996233] [ 31.996450] Memory state around the buggy address: [ 31.997029] ffff88801a121380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.997887] ffff88801a121400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.998757] >ffff88801a121480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.999639] ^ [ 32.000389] ffff88801a121500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.001246] ffff88801a121580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.002088] ================================================================== [ 32.003014] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.785671] BUG: Bad rss-counter state mm:000000001d4dd405 type:MM_FILEPAGES val:33 [ 33.786664] BUG: Bad rss-counter state mm:000000001d4dd405 type:MM_ANONPAGES val:22 [ 34.173719] BUG: Bad rss-counter state mm:00000000e82c9659 type:MM_FILEPAGES val:33 [ 34.174309] BUG: Bad rss-counter state mm:00000000e82c9659 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25845' (ECDSA) to the list of known hosts. 2023/06/21 10:45:47 fuzzer started 2023/06/21 10:45:47 dialing manager at localhost:36067 2023/06/21 10:45:47 checking machine... 2023/06/21 10:45:47 checking revisions... [ 34.722436] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:45:48 testing simple program... [ 34.766672] cgroup: Unknown subsys name 'net' [ 34.799405] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:45:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff864bce01 RDX=1ffff1100d9c135e RSI=ffffffff8451349f RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff864bce30 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6d7d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888013e20c60 RIP=ffffffff813ad47e RFL=00000286 [--S--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 0000000000000000 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=00007ffe4ff0a9e8 CR3=0000000005482000 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=00007f3e9dfc5510000055e4f635a790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfc06 RBX=ffffffff85dfe034 RCX=ffffffff8180c704 RDX=0000000000000000 RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88800f177640 R8 =ffffffff86138eb0 R9 =ffff88800f177738 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe038 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fcb38927900 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=00007ffc1a749000 CR3=000000000ff3c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000