syzkaller login: [ 39.318307] BUG: Bad rss-counter state mm:00000000800bb785 type:MM_FILEPAGES val:33 [ 39.319783] BUG: Bad rss-counter state mm:00000000800bb785 type:MM_ANONPAGES val:22 [ 39.471645] ================================================================== [ 39.472552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.473490] Read of size 8 at addr ffff88801a07fed8 by task sshd/221 [ 39.474253] [ 39.474475] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.475464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.476466] Call Trace: [ 39.476811] [ 39.477095] dump_stack_lvl+0x91/0xf0 [ 39.477587] print_report+0xcc/0x620 [ 39.478070] ? __virt_addr_valid+0x102/0x340 [ 39.478623] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.479259] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.479876] kasan_report+0xbe/0xf0 [ 39.480364] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.480986] vma_interval_tree_remove+0xc75/0xec0 [ 39.481585] vma_prepare+0xc54/0x11a0 [ 39.482061] __split_vma+0x5af/0x950 [ 39.482537] ? __pfx___split_vma+0x10/0x10 [ 39.483077] ? find_held_lock+0x2c/0x110 [ 39.483620] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.484212] ? lock_is_held_type+0x9f/0x120 [ 39.484779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.485402] ? mtree_range_walk+0x632/0x900 [ 39.485953] ? mas_walk+0x5c7/0x7c0 [ 39.486454] do_vmi_munmap+0x1f1/0x2b0 [ 39.486973] mmap_region+0x1f9/0x2660 [ 39.487468] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.488002] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.488750] ? __pfx_lock_acquire+0x10/0x10 [ 39.489302] ? __pfx_mmap_region+0x10/0x10 [ 39.489844] ? security_mmap_addr+0x7d/0xa0 [ 39.490378] ? get_unmapped_area+0x1f5/0x3f0 [ 39.490944] do_mmap+0x854/0xf00 [ 39.491390] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.491890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.492470] ksys_mmap_pgoff+0x3af/0x500 [ 39.492987] do_syscall_64+0x3f/0x90 [ 39.493486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.494149] RIP: 0033:0x7fbe19637d82 [ 39.494617] 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 [ 39.496762] RSP: 002b:00007ffda3460c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.497673] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe19637d82 [ 39.498525] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe18a71000 [ 39.499397] RBP: 00007fbe18a71000 R08: 0000000000000009 R09: 0000000000001000 [ 39.500250] R10: 0000000000000812 R11: 0000000000000206 R12: 000056117f567ec0 [ 39.501108] R13: 00007ffda3460c80 R14: 00007ffda3460cb0 R15: 00007ffda3461010 [ 39.501988] [ 39.502299] [ 39.502519] Allocated by task 214: [ 39.502972] kasan_save_stack+0x22/0x50 [ 39.503497] kasan_set_track+0x25/0x30 [ 39.504010] __kasan_slab_alloc+0x59/0x70 [ 39.504550] kmem_cache_alloc+0x16b/0x370 [ 39.505089] vm_area_dup+0x20/0x160 [ 39.505556] __split_vma+0x170/0x950 [ 39.506052] split_vma+0xc6/0x110 [ 39.506517] mprotect_fixup+0x8d2/0xb30 [ 39.507060] do_mprotect_pkey+0x87e/0xd40 [ 39.507596] __x64_sys_mprotect+0x78/0xc0 [ 39.508146] do_syscall_64+0x3f/0x90 [ 39.508623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.509265] [ 39.509481] Freed by task 214: [ 39.509868] kasan_save_stack+0x22/0x50 [ 39.510374] kasan_set_track+0x25/0x30 [ 39.510870] kasan_save_free_info+0x2b/0x50 [ 39.511404] __kasan_slab_free+0x10a/0x190 [ 39.511938] kmem_cache_free+0x10d/0x4d0 [ 39.512445] rcu_core+0x8c8/0x2860 [ 39.512898] __do_softirq+0x1b7/0x7d4 [ 39.513392] [ 39.513610] Last potentially related work creation: [ 39.514198] kasan_save_stack+0x22/0x50 [ 39.514704] __kasan_record_aux_stack+0x8e/0xa0 [ 39.515320] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.515979] remove_vma+0x139/0x170 [ 39.516446] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.517015] do_vmi_munmap+0x1f1/0x2b0 [ 39.517517] __vm_munmap+0x138/0x3a0 [ 39.517996] __x64_sys_munmap+0x59/0x80 [ 39.518508] do_syscall_64+0x3f/0x90 [ 39.519013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.519661] [ 39.519881] The buggy address belongs to the object at ffff88801a07fe80 [ 39.519881] which belongs to the cache vm_area_struct of size 168 [ 39.521398] The buggy address is located 88 bytes inside of [ 39.521398] freed 168-byte region [ffff88801a07fe80, ffff88801a07ff28) [ 39.522828] [ 39.523050] The buggy address belongs to the physical page: [ 39.523723] page:0000000021bf63c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a07f [ 39.524837] memcg:ffff88801a25c001 [ 39.525281] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.525942] page_type: 0xffffffff() [ 39.526404] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.527368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a25c001 [ 39.528274] page dumped because: kasan: bad access detected [ 39.528930] [ 39.529152] Memory state around the buggy address: [ 39.529731] ffff88801a07fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.530590] ffff88801a07fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 39.531452] >ffff88801a07fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.532330] ^ [ 39.533073] ffff88801a07ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 39.533927] ffff88801a07ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.534804] ================================================================== [ 39.535813] Disabling lock debugging due to kernel taint [ 41.699276] BUG: Bad rss-counter state mm:000000007dbd5d7f type:MM_FILEPAGES val:33 [ 41.700520] BUG: Bad rss-counter state mm:000000007dbd5d7f type:MM_ANONPAGES val:22 [ 42.224012] BUG: Bad rss-counter state mm:00000000e6912984 type:MM_FILEPAGES val:33 [ 42.225178] BUG: Bad rss-counter state mm:00000000e6912984 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24442' (ECDSA) to the list of known hosts. 2023/06/20 06:43:54 fuzzer started 2023/06/20 06:43:55 dialing manager at localhost:44161 2023/06/20 06:43:55 checking machine... 2023/06/20 06:43:55 checking revisions... [ 42.870728] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:43:55 testing simple program... [ 42.918692] cgroup: Unknown subsys name 'net' [ 42.990713] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:43:45 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=000000000000b91a RCX=ffff88801414b7e8 RDX=0000000000005ed1 RSI=0000000000000000 RDI=ffff88801414b7e8 RBP=ffff888015b87578 RSP=ffff888015b874f0 R8 =0000000000000001 R9 =0000000000000366 R10=0000000000000000 R11=00000000fa83b2da R12=ffff88801414b700 R13=ffffffff85d3d000 R14=0000000000000336 R15=000000000000b91a RIP=ffffffff81293754 RFL=00000012 [----A--] 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 00007fa9b1c75900 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=00007fa9b222a650 CR3=000000001c9be000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffc1426fad8 CR3=0000000005482000 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=00007fdc8872e510000055c9cb974790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000