syzkaller login: [ 31.536465] BUG: Bad rss-counter state mm:00000000c6483c89 type:MM_FILEPAGES val:33 [ 31.537752] BUG: Bad rss-counter state mm:00000000c6483c89 type:MM_ANONPAGES val:22 [ 31.575148] ================================================================== [ 31.576065] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.576981] Read of size 8 at addr ffff88800e238228 by task sshd/218 [ 31.577851] [ 31.578075] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.578936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.579893] Call Trace: [ 31.580213] [ 31.580503] dump_stack_lvl+0x91/0xf0 [ 31.580996] print_report+0xcc/0x620 [ 31.581511] ? __virt_addr_valid+0x102/0x340 [ 31.582062] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.582675] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.583282] kasan_report+0xbe/0xf0 [ 31.583765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.584401] vma_interval_tree_remove+0xc75/0xec0 [ 31.585075] vma_prepare+0xc54/0x11a0 [ 31.585626] __split_vma+0x5af/0x950 [ 31.586142] ? __pfx___split_vma+0x10/0x10 [ 31.586734] ? find_held_lock+0x2c/0x110 [ 31.587308] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.587928] ? lock_is_held_type+0x9f/0x120 [ 31.588526] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.589195] ? mtree_range_walk+0x632/0x900 [ 31.589824] ? mas_walk+0x5c7/0x7c0 [ 31.590351] do_vmi_munmap+0x1f1/0x2b0 [ 31.590892] mmap_region+0x1f9/0x2660 [ 31.591424] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.591992] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.592777] ? __pfx_lock_acquire+0x10/0x10 [ 31.593385] ? __pfx_mmap_region+0x10/0x10 [ 31.593974] ? security_mmap_addr+0x7d/0xa0 [ 31.594570] ? get_unmapped_area+0x1f5/0x3f0 [ 31.595183] do_mmap+0x854/0xf00 [ 31.595661] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.596206] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.596821] ksys_mmap_pgoff+0x3af/0x500 [ 31.597397] do_syscall_64+0x3f/0x90 [ 31.597921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.598637] RIP: 0033:0x7f78f5658d82 [ 31.599146] 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 [ 31.601520] RSP: 002b:00007ffc34a62bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.602515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78f5658d82 [ 31.603446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78f4a92000 [ 31.604373] RBP: 00007f78f4a92000 R08: 0000000000000009 R09: 0000000000001000 [ 31.605303] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f576228d90 [ 31.606259] R13: 00007ffc34a62c10 R14: 00007ffc34a62c40 R15: 00007ffc34a62fa0 [ 31.607191] [ 31.607518] [ 31.607753] Allocated by task 211: [ 31.608230] kasan_save_stack+0x22/0x50 [ 31.608794] kasan_set_track+0x25/0x30 [ 31.609353] __kasan_slab_alloc+0x59/0x70 [ 31.609942] kmem_cache_alloc+0x16b/0x370 [ 31.610507] vm_area_dup+0x20/0x160 [ 31.611004] __split_vma+0x170/0x950 [ 31.611516] split_vma+0xc6/0x110 [ 31.611997] mprotect_fixup+0x8d2/0xb30 [ 31.612556] do_mprotect_pkey+0x87e/0xd40 [ 31.613132] __x64_sys_mprotect+0x78/0xc0 [ 31.613720] do_syscall_64+0x3f/0x90 [ 31.614246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.614967] [ 31.615208] Freed by task 19: [ 31.615630] kasan_save_stack+0x22/0x50 [ 31.616180] kasan_set_track+0x25/0x30 [ 31.616735] kasan_save_free_info+0x2b/0x50 [ 31.617314] __kasan_slab_free+0x10a/0x190 [ 31.617918] kmem_cache_free+0x10d/0x4d0 [ 31.618468] rcu_core+0x8c8/0x2860 [ 31.618957] __do_softirq+0x1b7/0x7d4 [ 31.619486] [ 31.619723] Last potentially related work creation: [ 31.620377] kasan_save_stack+0x22/0x50 [ 31.620937] __kasan_record_aux_stack+0x8e/0xa0 [ 31.621590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.622284] remove_vma+0x139/0x170 [ 31.622783] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.623393] do_vmi_munmap+0x1f1/0x2b0 [ 31.623934] __vm_munmap+0x138/0x3a0 [ 31.624445] __x64_sys_munmap+0x59/0x80 [ 31.625003] do_syscall_64+0x3f/0x90 [ 31.625561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.626267] [ 31.626510] Second to last potentially related work creation: [ 31.627274] kasan_save_stack+0x22/0x50 [ 31.627836] __kasan_record_aux_stack+0x8e/0xa0 [ 31.628469] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.629192] remove_vma+0x139/0x170 [ 31.629702] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.630317] do_vmi_munmap+0x1f1/0x2b0 [ 31.630846] mmap_region+0x1f9/0x2660 [ 31.631377] do_mmap+0x854/0xf00 [ 31.631855] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.632392] ksys_mmap_pgoff+0x3af/0x500 [ 31.632944] do_syscall_64+0x3f/0x90 [ 31.633475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.634178] [ 31.634414] The buggy address belongs to the object at ffff88800e2381d0 [ 31.634414] which belongs to the cache vm_area_struct of size 168 [ 31.636045] The buggy address is located 88 bytes inside of [ 31.636045] freed 168-byte region [ffff88800e2381d0, ffff88800e238278) [ 31.637641] [ 31.637879] The buggy address belongs to the physical page: [ 31.638627] page:000000009cb38044 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe238 [ 31.639810] memcg:ffff88800d7aa701 [ 31.640284] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.641053] page_type: 0xffffffff() [ 31.641562] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.642575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7aa701 [ 31.643590] page dumped because: kasan: bad access detected [ 31.644325] [ 31.644566] Memory state around the buggy address: [ 31.645209] ffff88800e238100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.646175] ffff88800e238180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.647118] >ffff88800e238200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.648045] ^ [ 31.648651] ffff88800e238280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.649618] ffff88800e238300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.650573] ================================================================== [ 31.651786] Disabling lock debugging due to kernel taint [ 33.524843] BUG: Bad rss-counter state mm:000000004a93c4d7 type:MM_FILEPAGES val:33 [ 33.526180] BUG: Bad rss-counter state mm:000000004a93c4d7 type:MM_ANONPAGES val:22 [ 33.891530] BUG: Bad rss-counter state mm:00000000eadcb9c4 type:MM_FILEPAGES val:33 [ 33.892619] BUG: Bad rss-counter state mm:00000000eadcb9c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26573' (ECDSA) to the list of known hosts. 2023/06/20 11:45:39 fuzzer started 2023/06/20 11:45:39 dialing manager at localhost:36067 2023/06/20 11:45:39 checking machine... 2023/06/20 11:45:39 checking revisions... [ 34.562276] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:45:39 testing simple program... [ 34.613168] cgroup: Unknown subsys name 'net' [ 34.664323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:45:39 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f07e4b83040 CR3=0000000019c88000 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=2038333a35343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a35343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fbfbfbfbfbfbfbfb RBX=0000000000000000 RCX=0000000000000005 RDX=0000000000000348 RSI=00000000000000fb RDI=ffffed1001e2d528 RBP=ffffffff8117fdd9 RSP=ffff88806cf09dd0 R8 =0000000000001b40 R9 =0000000000000000 R10=ffffed1001e2d368 R11=00000000000b6a61 R12=ffff88800f169b40 R13=ffff8880087a0640 R14=ffffffff8117fdd9 R15=ffff88800a2f9f80 RIP=ffffffff8451340a RFL=00000206 [-----P-] 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 00007f852e385900 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=00007ffd6ac76000 CR3=000000001a25a000 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=563412feff00545000000000000080fe 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