syzkaller login: [ 33.131019] BUG: Bad rss-counter state mm:000000000713ea94 type:MM_FILEPAGES val:33 [ 33.132285] BUG: Bad rss-counter state mm:000000000713ea94 type:MM_ANONPAGES val:22 [ 33.191532] ================================================================== [ 33.192431] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.193371] Read of size 8 at addr ffff88800f270140 by task sshd/219 [ 33.194138] [ 33.194353] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.195345] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.196311] Call Trace: [ 33.196630] [ 33.196913] dump_stack_lvl+0x91/0xf0 [ 33.197412] print_report+0xcc/0x620 [ 33.197894] ? __virt_addr_valid+0x102/0x340 [ 33.198443] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.199065] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.199681] kasan_report+0xbe/0xf0 [ 33.200150] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.200767] vma_interval_tree_remove+0xc75/0xec0 [ 33.201367] vma_prepare+0xc54/0x11a0 [ 33.201842] __split_vma+0x5af/0x950 [ 33.202315] ? __pfx___split_vma+0x10/0x10 [ 33.202844] ? find_held_lock+0x2c/0x110 [ 33.203370] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.203931] ? lock_is_held_type+0x9f/0x120 [ 33.204457] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.205067] ? mtree_range_walk+0x632/0x900 [ 33.205607] ? mas_walk+0x5c7/0x7c0 [ 33.206078] do_vmi_munmap+0x1f1/0x2b0 [ 33.206568] mmap_region+0x1f9/0x2660 [ 33.207072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.207574] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.208285] ? __pfx_lock_acquire+0x10/0x10 [ 33.208812] ? __pfx_mmap_region+0x10/0x10 [ 33.209331] ? security_mmap_addr+0x7d/0xa0 [ 33.209861] ? get_unmapped_area+0x1f5/0x3f0 [ 33.210406] do_mmap+0x854/0xf00 [ 33.210848] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.211354] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.211907] ksys_mmap_pgoff+0x3af/0x500 [ 33.212403] do_syscall_64+0x3f/0x90 [ 33.212876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.213514] RIP: 0033:0x7fa8c2912d82 [ 33.213966] 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 [ 33.216083] RSP: 002b:00007fff6369b5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.216980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8c2912d82 [ 33.217826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8c1d4c000 [ 33.218663] RBP: 00007fa8c1d4c000 R08: 0000000000000009 R09: 0000000000001000 [ 33.219521] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b06b7ed90 [ 33.220359] R13: 00007fff6369b5c0 R14: 00007fff6369b5f0 R15: 00007fff6369b950 [ 33.221202] [ 33.221501] [ 33.221717] Allocated by task 212: [ 33.222148] kasan_save_stack+0x22/0x50 [ 33.222642] kasan_set_track+0x25/0x30 [ 33.223148] __kasan_slab_alloc+0x59/0x70 [ 33.223669] kmem_cache_alloc+0x16b/0x370 [ 33.224184] vm_area_dup+0x20/0x160 [ 33.224635] __split_vma+0x170/0x950 [ 33.225093] split_vma+0xc6/0x110 [ 33.225530] mprotect_fixup+0x8d2/0xb30 [ 33.226029] do_mprotect_pkey+0x87e/0xd40 [ 33.226548] __x64_sys_mprotect+0x78/0xc0 [ 33.227079] do_syscall_64+0x3f/0x90 [ 33.227546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.228180] [ 33.228393] Freed by task 212: [ 33.228789] kasan_save_stack+0x22/0x50 [ 33.229286] kasan_set_track+0x25/0x30 [ 33.229772] kasan_save_free_info+0x2b/0x50 [ 33.230302] __kasan_slab_free+0x10a/0x190 [ 33.230828] kmem_cache_free+0x10d/0x4d0 [ 33.231345] rcu_core+0x8c8/0x2860 [ 33.231785] __do_softirq+0x1b7/0x7d4 [ 33.232263] [ 33.232474] Last potentially related work creation: [ 33.233054] kasan_save_stack+0x22/0x50 [ 33.233553] __kasan_record_aux_stack+0x8e/0xa0 [ 33.234121] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.234758] remove_vma+0x139/0x170 [ 33.235218] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.235780] do_vmi_munmap+0x1f1/0x2b0 [ 33.236264] __vm_munmap+0x138/0x3a0 [ 33.236731] __x64_sys_munmap+0x59/0x80 [ 33.237226] do_syscall_64+0x3f/0x90 [ 33.237700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.238337] [ 33.238549] Second to last potentially related work creation: [ 33.239231] kasan_save_stack+0x22/0x50 [ 33.239731] __kasan_record_aux_stack+0x8e/0xa0 [ 33.240298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.240934] remove_vma+0x139/0x170 [ 33.241382] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.241937] do_vmi_munmap+0x1f1/0x2b0 [ 33.242416] __vm_munmap+0x138/0x3a0 [ 33.242882] elf_map+0x26f/0x310 [ 33.243321] load_elf_binary+0x3417/0x5030 [ 33.243850] bprm_execve+0x803/0x1940 [ 33.244311] do_execveat_common+0x734/0x8e0 [ 33.244831] __x64_sys_execve+0x93/0xc0 [ 33.245319] do_syscall_64+0x3f/0x90 [ 33.245788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.246421] [ 33.246633] The buggy address belongs to the object at ffff88800f2700e8 [ 33.246633] which belongs to the cache vm_area_struct of size 168 [ 33.248110] The buggy address is located 88 bytes inside of [ 33.248110] freed 168-byte region [ffff88800f2700e8, ffff88800f270190) [ 33.249510] [ 33.249722] The buggy address belongs to the physical page: [ 33.250376] page:00000000191cc4e1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf270 [ 33.251457] memcg:ffff88800e77ed01 [ 33.251877] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.252521] page_type: 0xffffffff() [ 33.252964] raw: 0100000000000200 ffff88800879fc80 ffffea0000359500 dead000000000008 [ 33.253872] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e77ed01 [ 33.254769] page dumped because: kasan: bad access detected [ 33.255437] [ 33.255647] Memory state around the buggy address: [ 33.256247] ffff88800f270000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.257131] ffff88800f270080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 33.258024] >ffff88800f270100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.258887] ^ [ 33.259522] ffff88800f270180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.260370] ffff88800f270200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.261216] ================================================================== [ 33.262565] Disabling lock debugging due to kernel taint [ 35.184291] BUG: Bad rss-counter state mm:0000000022889154 type:MM_FILEPAGES val:33 [ 35.185910] BUG: Bad rss-counter state mm:0000000022889154 type:MM_ANONPAGES val:22 [ 35.717315] BUG: Bad rss-counter state mm:0000000086b798f7 type:MM_FILEPAGES val:33 [ 35.718508] BUG: Bad rss-counter state mm:0000000086b798f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53657' (ECDSA) to the list of known hosts. 2023/06/19 16:58:55 fuzzer started 2023/06/19 16:58:55 dialing manager at localhost:44161 2023/06/19 16:58:55 checking machine... 2023/06/19 16:58:55 checking revisions... [ 36.426671] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:58:55 testing simple program... [ 36.478664] cgroup: Unknown subsys name 'net' [ 36.516545] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:58:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f6895465580 CR3=0000000015bf6000 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=2034353a38353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a38353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813782a8 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88806cf09e58 RDI=ffffffff813782a8 RBP=ffffffff813782a8 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=0000000000000001 R13=0000000000000000 R14=ffff88800c501b40 R15=ffff88800f2f12e0 RIP=ffffffff811fc772 RFL=00000283 [--S---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 00007f2a5655a900 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=00007fff7dad5000 CR3=0000000009574000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000