[ 23.912384] BUG: Bad rss-counter state mm:00000000d4b8b8c5 type:MM_FILEPAGES val:33 [ 23.913697] BUG: Bad rss-counter state mm:00000000d4b8b8c5 type:MM_ANONPAGES val:22 [ 24.077225] ================================================================== [ 24.078197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.079181] Read of size 8 at addr ffff888019c59058 by task sshd/219 [ 24.080133] [ 24.080391] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.081276] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.082305] Call Trace: [ 24.082646] [ 24.082946] dump_stack_lvl+0x91/0xf0 [ 24.083490] print_report+0xcc/0x620 [ 24.083995] ? __virt_addr_valid+0x102/0x340 [ 24.084581] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.085217] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.085858] kasan_report+0xbe/0xf0 [ 24.086355] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.087016] vma_interval_tree_remove+0xc75/0xec0 [ 24.087647] vma_prepare+0xc54/0x11a0 [ 24.088150] __split_vma+0x5af/0x950 [ 24.088643] ? __pfx___split_vma+0x10/0x10 [ 24.089199] ? find_held_lock+0x2c/0x110 [ 24.089755] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.090344] ? lock_is_held_type+0x9f/0x120 [ 24.090913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.091556] ? mtree_range_walk+0x632/0x900 [ 24.092146] ? mas_walk+0x5c7/0x7c0 [ 24.092653] do_vmi_munmap+0x1f1/0x2b0 [ 24.093160] mmap_region+0x1f9/0x2660 [ 24.093675] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.094205] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.094954] ? __pfx_lock_acquire+0x10/0x10 [ 24.095526] ? __pfx_mmap_region+0x10/0x10 [ 24.096087] ? security_mmap_addr+0x7d/0xa0 [ 24.096656] ? get_unmapped_area+0x1f5/0x3f0 [ 24.097232] do_mmap+0x854/0xf00 [ 24.097691] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.098320] ? __pfx_vm_mmap_pgoff+0x10/0x10 Debian GNU/Linux[ 24.098981] ksys_mmap_pgoff+0x3af/0x500 [ 24.099794] do_syscall_64+0x3f/0x90 [ 24.100303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.100991] RIP: 0033:0x7f0f1855fd82 [ 24.101478] 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 [ 24.103739] RSP: 002b:00007ffc90e88cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.104689] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f1855fd82 [ 24.105584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f17999000 [ 24.106481] RBP: 00007f0f17999000 R08: 0000000000000009 R09: 0000000000001000 [ 24.107371] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d85b65af60 [ 24.108210] R13: 00007ffc90e88cd0 R14: 00007ffc90e88d00 R15: 00007ffc90e89060 [ 24.109069] [ 24.109357] [ 24.109572] Allocated by task 212: [ 24.110003] kasan_save_stack+0x22/0x50 [ 24.110503] kasan_set_track+0x25/0x30 [ 24.111002] __kasan_slab_alloc+0x59/0x70 [ 24.111531] kmem_cache_alloc+0x16b/0x370 [ 24.112047] vm_area_dup+0x20/0x160 [ 24.112500] __split_vma+0x170/0x950 [ 24.112960] split_vma+0xc6/0x110 [ 24.113393] mprotect_fixup+0x8d2/0xb30 [ 24.113894] do_mprotect_pkey+0x87e/0xd40 [ 24.114411] __x64_sys_mprotect+0x78/0xc0 [ 24.114926] do_syscall_64+0x3f/0x90 [ 24.115413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.116061] [ 24.116278] Freed by task 212: [ 24.116667] kasan_save_stack+0x22/0x50 [ 24.117165] kasan_set_track+0x25/0x30 [ 24.117659] kasan_save_free_info+0x2b/0x50 [ 24.118191] __kasan_slab_free+0x10a/0x190 [ 24.118735] kmem_cache_free+0x10d/0x4d0 [ 24.119245] rcu_core+0x8c8/0x2860 [ 24.119683] __do_softirq+0x1b7/0x7d4 [ 24.120157] [ 24.120377] Last potentially related work creation: [ 24.120955] kasan_save_stack+0x22/0x50 [ 24.121465] __kasan_record_aux_stack+0x8e/0xa0 [ 24.122035] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.122683] remove_vma+0x139/0x170 [ 24.123132] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.123695] do_vmi_munmap+0x1f1/0x2b0 [ 24.124179] __vm_munmap+0x138/0x3a0 [ 24.124646] __x64_sys_munmap+0x59/0x80 [ 24.125141] do_syscall_64+0x3f/0x90 [ 24.125610] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.126245] [ 24.126467] The buggy address belongs to the object at ffff888019c59000 [ 24.126467] which belongs to the cache vm_area_struct of size 168 [ 24.127945] The buggy address is located 88 bytes inside of [ 24.127945] freed 168-byte region [ffff888019c59000, ffff888019c590a8) [ 24.129336] [ 24.129552] The buggy address belongs to the physical page: [ 24.130206] page:0000000079461d2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c59 [ 24.131295] memcg:ffff888010329601 [ 24.131727] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.132373] page_type: 0xffffffff() [ 24.132818] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.133731] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010329601 [ 24.134624] page dumped because: kasan: bad access detected [ 24.135283] [ 24.135499] Memory state around the buggy address: [ 24.136077] ffff888019c58f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.136931] ffff888019c58f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.137785] >ffff888019c59000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.138631] ^ [ 24.139368] ffff888019c59080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.140211] ffff888019c59100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.141058] ================================================================== 11 syzkaller ttyS0 syzkaller login: [ 24.142725] Disabling lock debugging due to kernel taint [ 26.153386] BUG: Bad rss-counter state mm:000000003f5ac4db type:MM_FILEPAGES val:33 [ 26.154451] BUG: Bad rss-counter state mm:000000003f5ac4db type:MM_ANONPAGES val:22 [ 26.711525] BUG: Bad rss-counter state mm:00000000472e07d6 type:MM_FILEPAGES val:33 [ 26.712696] BUG: Bad rss-counter state mm:00000000472e07d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59969' (ECDSA) to the list of known hosts. 2023/06/21 05:19:45 fuzzer started 2023/06/21 05:19:45 dialing manager at localhost:36067 2023/06/21 05:19:45 checking machine... 2023/06/21 05:19:45 checking revisions... [ 27.354876] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:19:45 testing simple program... [ 27.406761] cgroup: Unknown subsys name 'net' [ 27.471426] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:19:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008f67000 RCX=ffff888008f67000 RDX=ffff8880146cf8c8 RSI=ffff8880146ea3c0 RDI=ffff888009077000 RBP=ffff888009077000 RSP=ffff8880146cf868 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff8880146ea3c0 R14=0000000000000000 R15=ffff888009077504 RIP=ffffffff83870e64 RFL=00000293 [--S-A-C] 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 00007fb1b2070900 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=00007ffc0162c000 CR3=000000000e08e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f6f2793dc00 CR3=000000000cb2a000 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=5a0bcee2d20307b6ab40a9f655308a83 XMM02=ec2efd57dc4c00df000000000011ac38 XMM03=ed47ebe4cc643544000000000011ad08 XMM04=1889fac8b726381600000000000ae988 XMM05=19e9129bd510f23500000000001315a8 XMM06=a6bf54114308ed24000000000012fd48 XMM07=e042d86d42eb936e0000000000121a00 XMM08=ed47ebe4cc643544000000000011ad08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000