syzkaller login: [ 31.066457] BUG: Bad rss-counter state mm:00000000e22b5ab2 type:MM_FILEPAGES val:33 [ 31.067462] BUG: Bad rss-counter state mm:00000000e22b5ab2 type:MM_ANONPAGES val:22 [ 31.231751] ================================================================== [ 31.232879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.234021] Read of size 8 at addr ffff88800dc82ed8 by task sshd/221 [ 31.235160] [ 31.235425] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.236489] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.237512] Call Trace: [ 31.237833] [ 31.238118] dump_stack_lvl+0x91/0xf0 [ 31.238620] print_report+0xcc/0x620 [ 31.239104] ? __virt_addr_valid+0x102/0x340 [ 31.239661] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240286] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.240905] kasan_report+0xbe/0xf0 [ 31.241380] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242002] vma_interval_tree_remove+0xc75/0xec0 [ 31.242609] vma_prepare+0xc54/0x11a0 [ 31.243093] __split_vma+0x5af/0x950 [ 31.243564] ? __pfx___split_vma+0x10/0x10 [ 31.244094] ? find_held_lock+0x2c/0x110 [ 31.244613] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.245178] ? lock_is_held_type+0x9f/0x120 [ 31.245717] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.246321] ? mtree_range_walk+0x632/0x900 [ 31.246874] ? mas_walk+0x5c7/0x7c0 [ 31.247360] do_vmi_munmap+0x1f1/0x2b0 [ 31.247865] mmap_region+0x1f9/0x2660 [ 31.248376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.248895] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.249627] ? __pfx_lock_acquire+0x10/0x10 [ 31.250170] ? __pfx_mmap_region+0x10/0x10 [ 31.250717] ? security_mmap_addr+0x7d/0xa0 [ 31.251261] ? get_unmapped_area+0x1f5/0x3f0 [ 31.251824] do_mmap+0x854/0xf00 [ 31.252287] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.252786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.253372] ksys_mmap_pgoff+0x3af/0x500 [ 31.253894] do_syscall_64+0x3f/0x90 [ 31.254380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255034] RIP: 0033:0x7fa95ca0fd82 [ 31.255511] 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 [ 31.257703] RSP: 002b:00007ffc616f1d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.258622] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa95ca0fd82 [ 31.259487] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa95be49000 [ 31.260367] RBP: 00007fa95be49000 R08: 0000000000000009 R09: 0000000000001000 [ 31.261227] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e12d53ec0 [ 31.262080] R13: 00007ffc616f1d60 R14: 00007ffc616f1d90 R15: 00007ffc616f20f0 [ 31.262951] [ 31.263252] [ 31.263467] Allocated by task 214: [ 31.263906] kasan_save_stack+0x22/0x50 [ 31.264423] kasan_set_track+0x25/0x30 [ 31.264920] __kasan_slab_alloc+0x59/0x70 [ 31.265455] kmem_cache_alloc+0x16b/0x370 [ 31.265979] vm_area_dup+0x20/0x160 [ 31.266437] __split_vma+0x170/0x950 [ 31.266910] split_vma+0xc6/0x110 [ 31.267356] mprotect_fixup+0x8d2/0xb30 [ 31.267866] do_mprotect_pkey+0x87e/0xd40 [ 31.268419] __x64_sys_mprotect+0x78/0xc0 [ 31.268941] do_syscall_64+0x3f/0x90 [ 31.269422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.270074] [ 31.270296] Freed by task 204: [ 31.270694] kasan_save_stack+0x22/0x50 [ 31.271205] kasan_set_track+0x25/0x30 [ 31.271705] kasan_save_free_info+0x2b/0x50 [ 31.272260] __kasan_slab_free+0x10a/0x190 [ 31.272799] kmem_cache_free+0x10d/0x4d0 [ 31.273312] rcu_core+0x8c8/0x2860 [ 31.273779] __do_softirq+0x1b7/0x7d4 [ 31.274258] [ 31.274474] Last potentially related work creation: [ 31.275066] kasan_save_stack+0x22/0x50 [ 31.275572] __kasan_record_aux_stack+0x8e/0xa0 [ 31.276289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.276934] remove_vma+0x139/0x170 [ 31.277388] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.277956] do_vmi_munmap+0x1f1/0x2b0 [ 31.278450] __vm_munmap+0x138/0x3a0 [ 31.278917] __x64_sys_munmap+0x59/0x80 [ 31.279427] do_syscall_64+0x3f/0x90 [ 31.279901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280568] [ 31.280789] Second to last potentially related work creation: [ 31.281477] kasan_save_stack+0x22/0x50 [ 31.281988] __kasan_record_aux_stack+0x8e/0xa0 [ 31.282559] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.283226] remove_vma+0x139/0x170 [ 31.283684] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.284262] do_vmi_munmap+0x1f1/0x2b0 [ 31.284750] __vm_munmap+0x138/0x3a0 [ 31.285223] elf_map+0x26f/0x310 [ 31.285673] load_elf_binary+0xd82/0x5030 [ 31.286211] bprm_execve+0x803/0x1940 [ 31.286678] do_execveat_common+0x734/0x8e0 [ 31.287213] __x64_sys_execve+0x93/0xc0 [ 31.287710] do_syscall_64+0x3f/0x90 [ 31.288203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288874] [ 31.289088] The buggy address belongs to the object at ffff88800dc82e80 [ 31.289088] which belongs to the cache vm_area_struct of size 168 [ 31.290591] The buggy address is located 88 bytes inside of [ 31.290591] freed 168-byte region [ffff88800dc82e80, ffff88800dc82f28) [ 31.292022] [ 31.292248] The buggy address belongs to the physical page: [ 31.292907] page:00000000cbbf59b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc82 [ 31.294004] memcg:ffff88800951cb01 [ 31.294440] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.295165] page_type: 0xffffffff() [ 31.295624] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.296574] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800951cb01 [ 31.297500] page dumped because: kasan: bad access detected [ 31.298174] [ 31.298393] Memory state around the buggy address: [ 31.298986] ffff88800dc82d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.299853] ffff88800dc82e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.300720] >ffff88800dc82e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.301573] ^ [ 31.302293] ffff88800dc82f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.303157] ffff88800dc82f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.304008] ================================================================== [ 31.305026] Disabling lock debugging due to kernel taint [ 33.533941] BUG: Bad rss-counter state mm:00000000f5c9b714 type:MM_FILEPAGES val:33 [ 33.535163] BUG: Bad rss-counter state mm:00000000f5c9b714 type:MM_ANONPAGES val:22 [ 33.967568] BUG: Bad rss-counter state mm:00000000556c7fac type:MM_FILEPAGES val:33 [ 33.968744] BUG: Bad rss-counter state mm:00000000556c7fac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11267' (ECDSA) to the list of known hosts. 2023/06/21 03:59:51 fuzzer started 2023/06/21 03:59:51 dialing manager at localhost:36067 2023/06/21 03:59:51 checking machine... 2023/06/21 03:59:51 checking revisions... [ 34.630054] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:59:51 testing simple program... [ 34.690093] cgroup: Unknown subsys name 'net' [ 34.739050] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:59:50 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000010 RCX=ffffffff844a504f RDX=ffff8880159451c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88801ab62208 RSP=ffff888018ccfce0 R8 =0000000000000000 R9 =0000000000000002 R10=0000000000000008 R11=0000000000000000 R12=0000000000000002 R13=0000000000000008 R14=00007ffd439e0000 R15=00007fb42e8fcfff RIP=ffffffff814c086b RFL=00000297 [--S-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb42e399900 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=00007ffd439e0000 CR3=000000001589c000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=51456e696d09657420322e3223112e00 XMM07=672065736f6c635f6e6f69737365733a 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=00007ffc198bff48 CR3=0000000016b02000 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=2030353a39353a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a39353a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000