syzkaller login: [ 49.074982] BUG: Bad rss-counter state mm:00000000ddff09f1 type:MM_FILEPAGES val:33 [ 49.077347] BUG: Bad rss-counter state mm:00000000ddff09f1 type:MM_ANONPAGES val:22 [ 49.253452] ================================================================== [ 49.254423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.255395] Read of size 8 at addr ffff88800df026b0 by task sshd/221 [ 49.256189] [ 49.256416] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.257407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.258385] Call Trace: [ 49.258698] <TASK> [ 49.258977] dump_stack_lvl+0x91/0xf0 [ 49.259490] print_report+0xcc/0x620 [ 49.259973] ? __virt_addr_valid+0x102/0x340 [ 49.260545] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.261185] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.261820] kasan_report+0xbe/0xf0 [ 49.262294] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.262919] vma_interval_tree_remove+0xc75/0xec0 [ 49.263532] vma_prepare+0xc54/0x11a0 [ 49.264096] __split_vma+0x5af/0x950 [ 49.264662] ? __pfx___split_vma+0x10/0x10 [ 49.265291] ? find_held_lock+0x2c/0x110 [ 49.265898] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.266561] ? lock_is_held_type+0x9f/0x120 [ 49.267185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.267909] ? mtree_range_walk+0x632/0x900 [ 49.268568] ? mas_walk+0x5c7/0x7c0 [ 49.269120] do_vmi_munmap+0x1f1/0x2b0 [ 49.269696] mmap_region+0x1f9/0x2660 [ 49.270262] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.270858] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.271708] ? __pfx_lock_acquire+0x10/0x10 [ 49.272332] ? __pfx_mmap_region+0x10/0x10 [ 49.272981] ? security_mmap_addr+0x7d/0xa0 [ 49.273615] ? get_unmapped_area+0x1f5/0x3f0 [ 49.274262] do_mmap+0x854/0xf00 [ 49.274780] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.275367] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.276025] ksys_mmap_pgoff+0x3af/0x500 [ 49.276610] do_syscall_64+0x3f/0x90 [ 49.277173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.277922] RIP: 0033:0x7f457c697d82 [ 49.278461] 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 [ 49.281037] RSP: 002b:00007ffeea233678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.282124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f457c697d82 [ 49.283093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f457bad1000 [ 49.283962] RBP: 00007f457bad1000 R08: 0000000000000009 R09: 0000000000001000 [ 49.284820] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560764eefd90 [ 49.285666] R13: 00007ffeea233690 R14: 00007ffeea2336c0 R15: 00007ffeea233a20 [ 49.286541] </TASK> [ 49.286836] [ 49.287051] Allocated by task 214: [ 49.287495] kasan_save_stack+0x22/0x50 [ 49.287999] kasan_set_track+0x25/0x30 [ 49.288498] __kasan_slab_alloc+0x59/0x70 [ 49.289019] kmem_cache_alloc+0x16b/0x370 [ 49.289533] vm_area_dup+0x20/0x160 [ 49.289992] __split_vma+0x170/0x950 [ 49.290463] split_vma+0xc6/0x110 [ 49.290905] mprotect_fixup+0x8d2/0xb30 [ 49.291428] do_mprotect_pkey+0x87e/0xd40 [ 49.291953] __x64_sys_mprotect+0x78/0xc0 [ 49.292475] do_syscall_64+0x3f/0x90 [ 49.292952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.293599] [ 49.293817] Freed by task 214: [ 49.294204] kasan_save_stack+0x22/0x50 [ 49.294713] kasan_set_track+0x25/0x30 [ 49.295211] kasan_save_free_info+0x2b/0x50 [ 49.295765] __kasan_slab_free+0x10a/0x190 [ 49.296303] kmem_cache_free+0x10d/0x4d0 [ 49.296815] rcu_core+0x8c8/0x2860 [ 49.297257] __do_softirq+0x1b7/0x7d4 [ 49.297741] [ 49.297959] Last potentially related work creation: [ 49.298547] kasan_save_stack+0x22/0x50 [ 49.299049] __kasan_record_aux_stack+0x8e/0xa0 [ 49.299645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.300295] remove_vma+0x139/0x170 [ 49.300745] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.301303] do_vmi_munmap+0x1f1/0x2b0 [ 49.301791] __vm_munmap+0x138/0x3a0 [ 49.302258] __x64_sys_munmap+0x59/0x80 [ 49.302761] do_syscall_64+0x3f/0x90 [ 49.303232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.303896] [ 49.304113] Second to last potentially related work creation: [ 49.304799] kasan_save_stack+0x22/0x50 [ 49.305311] __kasan_record_aux_stack+0x8e/0xa0 [ 49.305897] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.306548] remove_vma+0x139/0x170 [ 49.307005] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.307570] do_vmi_munmap+0x1f1/0x2b0 [ 49.308058] mmap_region+0x1f9/0x2660 [ 49.308536] do_mmap+0x854/0xf00 [ 49.308968] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.309458] ksys_mmap_pgoff+0x3af/0x500 [ 49.309966] do_syscall_64+0x3f/0x90 [ 49.310443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.311096] [ 49.311315] The buggy address belongs to the object at ffff88800df02658 [ 49.311315] which belongs to the cache vm_area_struct of size 168 [ 49.312861] The buggy address is located 88 bytes inside of [ 49.312861] freed 168-byte region [ffff88800df02658, ffff88800df02700) [ 49.314317] [ 49.314540] The buggy address belongs to the physical page: [ 49.315227] page:000000002c472c79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf02 [ 49.316365] memcg:ffff88800e6c5a01 [ 49.316806] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.317485] page_type: 0xffffffff() [ 49.317955] raw: 0100000000000200 ffff88800879fc80 ffffea00003805c0 dead00000000000a [ 49.318902] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6c5a01 [ 49.319852] page dumped because: kasan: bad access detected [ 49.320541] [ 49.320763] Memory state around the buggy address: [ 49.321372] ffff88800df02580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.322266] ffff88800df02600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 49.323149] >ffff88800df02680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.324233] ^ [ 49.324951] ffff88800df02700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 49.326003] ffff88800df02780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 49.327054] ================================================================== [ 49.328618] Disabling lock debugging due to kernel taint [ 50.639804] BUG: Bad rss-counter state mm:000000007ee572c0 type:MM_FILEPAGES val:33 [ 50.640358] BUG: Bad rss-counter state mm:000000007ee572c0 type:MM_ANONPAGES val:22 [ 51.101736] BUG: Bad rss-counter state mm:0000000005a4112b type:MM_FILEPAGES val:33 [ 51.103583] BUG: Bad rss-counter state mm:0000000005a4112b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14282' (ECDSA) to the list of known hosts. 2023/06/19 16:34:09 fuzzer started 2023/06/19 16:34:09 dialing manager at localhost:44161 2023/06/19 16:34:09 checking machine... 2023/06/19 16:34:09 checking revisions... [ 51.853261] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:34:09 testing simple program... [ 51.894835] cgroup: Unknown subsys name 'net' [ 51.966998] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:33:48 Registers: info registers vcpu 0 RAX=ffffffff8180c522 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016bc7b01 RSI=ffff888016bc7b18 RDI=ffff888016bc7b18 RBP=ffff888016bc7a40 RSP=ffff888016bc7978 R8 =ffffffff860d68fa R9 =ffff888016bc7a28 R10=0000000000038001 R11=0000000000010b7e R12=ffff888016bc7a48 R13=ffff888016bc7a30 R14=ffff888016bc7b20 R15=ffff888016bc79e8 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f5253e46900 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=00007f52543fb650 CR3=000000000fd3a000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613751a RDX=1ffff110011caf24 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888008e57978 RSP=ffff888008e578b0 R8 =ffffffff8613751e R9 =ffff888008e57960 R10=0000000000038001 R11=0000000000020d8a R12=ffff888008e57980 R13=ffff888008e57968 R14=ffff888008e57c70 R15=ffff888008e57920 RIP=ffffffff81131271 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=00007f73b729fe10 CR3=000000000ec0a000 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=2038303a34333a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a34333a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000