syzkaller login: [ 30.523774] BUG: Bad rss-counter state mm:00000000b39ce731 type:MM_FILEPAGES val:33 [ 30.524999] BUG: Bad rss-counter state mm:00000000b39ce731 type:MM_ANONPAGES val:22 [ 30.668347] ================================================================== [ 30.669462] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.670570] Read of size 8 at addr ffff888018c26df0 by task sshd/220 [ 30.671641] [ 30.671915] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.672986] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.674057] Call Trace: [ 30.674404] [ 30.674710] dump_stack_lvl+0x91/0xf0 [ 30.675241] print_report+0xcc/0x620 [ 30.675787] ? __virt_addr_valid+0x102/0x340 [ 30.676370] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677042] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.677694] kasan_report+0xbe/0xf0 [ 30.678207] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678886] vma_interval_tree_remove+0xc75/0xec0 [ 30.679520] vma_prepare+0xc54/0x11a0 [ 30.680062] __split_vma+0x5af/0x950 [ 30.680565] ? __pfx___split_vma+0x10/0x10 [ 30.681153] ? find_held_lock+0x2c/0x110 [ 30.681729] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.682339] ? lock_is_held_type+0x9f/0x120 [ 30.682929] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.683599] ? mtree_range_walk+0x632/0x900 [ 30.684201] ? mas_walk+0x5c7/0x7c0 [ 30.684728] do_vmi_munmap+0x1f1/0x2b0 [ 30.685308] mmap_region+0x1f9/0x2660 [ 30.685848] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.686417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.687213] ? __pfx_lock_acquire+0x10/0x10 [ 30.687804] ? __pfx_mmap_region+0x10/0x10 [ 30.688415] ? security_mmap_addr+0x7d/0xa0 [ 30.689045] ? get_unmapped_area+0x1f5/0x3f0 [ 30.689655] do_mmap+0x854/0xf00 [ 30.690150] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.690700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.691320] ksys_mmap_pgoff+0x3af/0x500 [ 30.691881] do_syscall_64+0x3f/0x90 [ 30.692406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.693135] RIP: 0033:0x7f55a6017d82 [ 30.693645] 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 [ 30.695973] RSP: 002b:00007ffd4b714c98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.696931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55a6017d82 [ 30.697823] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55a5451000 [ 30.698738] RBP: 00007f55a5451000 R08: 0000000000000009 R09: 0000000000001000 [ 30.699636] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652b39e9b20 [ 30.700530] R13: 00007ffd4b714cb0 R14: 00007ffd4b714ce0 R15: 00007ffd4b715040 [ 30.701451] [ 30.701757] [ 30.701981] Allocated by task 213: [ 30.702434] kasan_save_stack+0x22/0x50 [ 30.702966] kasan_set_track+0x25/0x30 [ 30.703487] __kasan_slab_alloc+0x59/0x70 [ 30.704025] kmem_cache_alloc+0x16b/0x370 [ 30.704567] vm_area_dup+0x20/0x160 [ 30.705052] __split_vma+0x170/0x950 [ 30.705535] split_vma+0xc6/0x110 [ 30.705989] mprotect_fixup+0x8d2/0xb30 [ 30.706521] do_mprotect_pkey+0x87e/0xd40 [ 30.707048] __x64_sys_mprotect+0x78/0xc0 [ 30.707585] do_syscall_64+0x3f/0x90 [ 30.708089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.708763] [ 30.708996] Freed by task 13: [ 30.709407] kasan_save_stack+0x22/0x50 [ 30.709939] kasan_set_track+0x25/0x30 [ 30.710455] kasan_save_free_info+0x2b/0x50 [ 30.711015] __kasan_slab_free+0x10a/0x190 [ 30.711560] kmem_cache_free+0x10d/0x4d0 [ 30.712099] rcu_core+0x8c8/0x2860 [ 30.712609] __do_softirq+0x1b7/0x7d4 [ 30.713135] [ 30.713371] Last potentially related work creation: [ 30.713999] kasan_save_stack+0x22/0x50 [ 30.714546] __kasan_record_aux_stack+0x8e/0xa0 [ 30.715147] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.715824] remove_vma+0x139/0x170 [ 30.716295] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.716881] do_vmi_munmap+0x1f1/0x2b0 [ 30.717408] __vm_munmap+0x138/0x3a0 [ 30.717902] __x64_sys_munmap+0x59/0x80 [ 30.718430] do_syscall_64+0x3f/0x90 [ 30.718924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.719588] [ 30.719810] The buggy address belongs to the object at ffff888018c26d98 [ 30.719810] which belongs to the cache vm_area_struct of size 168 [ 30.721344] The buggy address is located 88 bytes inside of [ 30.721344] freed 168-byte region [ffff888018c26d98, ffff888018c26e40) [ 30.722751] [ 30.722965] The buggy address belongs to the physical page: [ 30.723624] page:00000000663bc3ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c26 [ 30.724711] memcg:ffff88801477e501 [ 30.725159] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.725799] page_type: 0xffffffff() [ 30.726253] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.727161] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801477e501 [ 30.728097] page dumped because: kasan: bad access detected [ 30.728774] [ 30.728997] Memory state around the buggy address: [ 30.729582] ffff888018c26c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.730440] ffff888018c26d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.731284] >ffff888018c26d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.732129] ^ [ 30.732950] ffff888018c26e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.733813] ffff888018c26e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.734665] ================================================================== [ 30.735588] Disabling lock debugging due to kernel taint [ 32.995559] BUG: Bad rss-counter state mm:0000000092560af3 type:MM_FILEPAGES val:33 [ 32.996751] BUG: Bad rss-counter state mm:0000000092560af3 type:MM_ANONPAGES val:22 [ 33.452347] BUG: Bad rss-counter state mm:0000000061636437 type:MM_FILEPAGES val:33 [ 33.453523] BUG: Bad rss-counter state mm:0000000061636437 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4354' (ECDSA) to the list of known hosts. 2023/06/19 22:46:16 fuzzer started 2023/06/19 22:46:17 dialing manager at localhost:44161 2023/06/19 22:46:17 checking machine... 2023/06/19 22:46:17 checking revisions... [ 34.078612] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:46:17 testing simple program... [ 34.129275] cgroup: Unknown subsys name 'net' [ 34.168557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:46:16 Registers: info registers vcpu 0 RAX=000055a4a5f08ee5 RBX=000055a4a5f26ed0 RCX=0a20676e69757373 RDX=000000000000000a RSI=000055a4a5f354b0 RDI=000055a4a5f08ee5 RBP=00007ffc9f50e0a0 RSP=00007ffc9f50e038 R8 =000055a4a5f354b0 R9 =00007f9f70cb2be0 R10=0000000000000100 R11=0000000000000246 R12=000000000000003f R13=000055a4a5f354b9 R14=000000000000000a R15=0000000000000035 RIP=00007f9f70c56b4b RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9f70700900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc9f508000 CR3=000000000e53e000 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=00000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8450d49f RDX=00000000000350d4 RSI=00000000000350d4 RDI=ffffffff865bbf10 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff8113077a RFL=00000216 [----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 =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=00007f282bcc6000 CR3=000000000c790000 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=7d4991d4c2fc398955497f5df3b71bfb XMM02=000000000011c560ec2efd57dc4c00df XMM03=0000000000123ea820a66e89a69717c0 XMM04=9243e825885a2def00000000000ae988 XMM05=19e9129bd510f2350000000000133a50 XMM06=7753ef8724eb4d5100000000001328b8 XMM07=e042d86d42eb936e0000000000124128 XMM08=20a66e89a69717c0000000000011c5c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000