syzkaller login: [ 39.457034] BUG: Bad rss-counter state mm:00000000d1287232 type:MM_FILEPAGES val:33 [ 39.458284] BUG: Bad rss-counter state mm:00000000d1287232 type:MM_ANONPAGES val:22 [ 39.507815] ================================================================== [ 39.508689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.509569] Read of size 8 at addr ffff88801682eb38 by task sshd/220 [ 39.510441] [ 39.510654] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.511470] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.512422] Call Trace: [ 39.512726] [ 39.512996] dump_stack_lvl+0x91/0xf0 [ 39.513458] print_report+0xcc/0x620 [ 39.513918] ? __virt_addr_valid+0x102/0x340 [ 39.514439] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.515029] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.515618] kasan_report+0xbe/0xf0 [ 39.516067] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.516661] vma_interval_tree_remove+0xc75/0xec0 [ 39.517235] vma_prepare+0xc54/0x11a0 [ 39.517710] __split_vma+0x5af/0x950 [ 39.518174] ? __pfx___split_vma+0x10/0x10 [ 39.518694] ? find_held_lock+0x2c/0x110 [ 39.519203] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.519789] ? lock_is_held_type+0x9f/0x120 [ 39.520326] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.520928] ? mtree_range_walk+0x632/0x900 [ 39.521478] ? mas_walk+0x5c7/0x7c0 [ 39.521950] do_vmi_munmap+0x1f1/0x2b0 [ 39.522434] mmap_region+0x1f9/0x2660 [ 39.522915] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.523423] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.524144] ? __pfx_lock_acquire+0x10/0x10 [ 39.524675] ? __pfx_mmap_region+0x10/0x10 [ 39.525200] ? security_mmap_addr+0x7d/0xa0 [ 39.525736] ? get_unmapped_area+0x1f5/0x3f0 [ 39.526289] do_mmap+0x854/0xf00 [ 39.526731] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.527229] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.527812] ksys_mmap_pgoff+0x3af/0x500 [ 39.528324] do_syscall_64+0x3f/0x90 [ 39.528804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.529445] RIP: 0033:0x7f9273506d82 [ 39.529904] 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 [ 39.532023] RSP: 002b:00007ffe1b0b9e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.532921] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9273506d82 [ 39.533763] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9272940000 [ 39.534600] RBP: 00007f9272940000 R08: 0000000000000009 R09: 0000000000001000 [ 39.535438] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557b6c1c6d90 [ 39.536290] R13: 00007ffe1b0b9e50 R14: 00007ffe1b0b9e80 R15: 00007ffe1b0ba1e0 [ 39.537126] [ 39.537412] [ 39.537626] Allocated by task 213: [ 39.538037] kasan_save_stack+0x22/0x50 [ 39.538544] kasan_set_track+0x25/0x30 [ 39.539042] __kasan_slab_alloc+0x59/0x70 [ 39.539581] kmem_cache_alloc+0x16b/0x370 [ 39.540098] vm_area_dup+0x20/0x160 [ 39.540557] __split_vma+0x170/0x950 [ 39.541021] split_vma+0xc6/0x110 [ 39.541457] mprotect_fixup+0x8d2/0xb30 [ 39.541952] do_mprotect_pkey+0x87e/0xd40 [ 39.542469] __x64_sys_mprotect+0x78/0xc0 [ 39.542987] do_syscall_64+0x3f/0x90 [ 39.543456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.544109] [ 39.544331] Freed by task 213: [ 39.544715] kasan_save_stack+0x22/0x50 [ 39.545213] kasan_set_track+0x25/0x30 [ 39.545702] kasan_save_free_info+0x2b/0x50 [ 39.546221] __kasan_slab_free+0x10a/0x190 [ 39.546756] kmem_cache_free+0x10d/0x4d0 [ 39.547259] rcu_core+0x8c8/0x2860 [ 39.547731] __do_softirq+0x1b7/0x7d4 [ 39.548209] [ 39.548420] Last potentially related work creation: [ 39.549002] kasan_save_stack+0x22/0x50 [ 39.549501] __kasan_record_aux_stack+0x8e/0xa0 [ 39.550068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.550698] remove_vma+0x139/0x170 [ 39.551153] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.551714] do_vmi_munmap+0x1f1/0x2b0 [ 39.552197] __vm_munmap+0x138/0x3a0 [ 39.552665] __x64_sys_munmap+0x59/0x80 [ 39.553153] do_syscall_64+0x3f/0x90 [ 39.553623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.554259] [ 39.554469] Second to last potentially related work creation: [ 39.555142] kasan_save_stack+0x22/0x50 [ 39.555653] __kasan_record_aux_stack+0x8e/0xa0 [ 39.556222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.556861] remove_vma+0x139/0x170 [ 39.557306] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.557857] do_vmi_munmap+0x1f1/0x2b0 [ 39.558338] mmap_region+0x1f9/0x2660 [ 39.558811] do_mmap+0x854/0xf00 [ 39.559244] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.559754] ksys_mmap_pgoff+0x3af/0x500 [ 39.560259] do_syscall_64+0x3f/0x90 [ 39.560732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.561368] [ 39.561582] The buggy address belongs to the object at ffff88801682eae0 [ 39.561582] which belongs to the cache vm_area_struct of size 168 [ 39.563051] The buggy address is located 88 bytes inside of [ 39.563051] freed 168-byte region [ffff88801682eae0, ffff88801682eb88) [ 39.564448] [ 39.564669] The buggy address belongs to the physical page: [ 39.565315] page:00000000761ba3c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1682e [ 39.566393] memcg:ffff888010049401 [ 39.566819] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.567510] page_type: 0xffffffff() [ 39.567975] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6bc0 dead000000000003 [ 39.568879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010049401 [ 39.569775] page dumped because: kasan: bad access detected [ 39.570432] [ 39.570650] Memory state around the buggy address: [ 39.571225] ffff88801682ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.572082] ffff88801682ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 39.572936] >ffff88801682eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.573781] ^ [ 39.574388] ffff88801682eb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.575239] ffff88801682ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.576084] ================================================================== [ 39.577073] Disabling lock debugging due to kernel taint [ 41.753541] BUG: Bad rss-counter state mm:00000000bb94c3ad type:MM_FILEPAGES val:33 [ 41.754550] BUG: Bad rss-counter state mm:00000000bb94c3ad type:MM_ANONPAGES val:22 [ 42.209001] BUG: Bad rss-counter state mm:000000008e222681 type:MM_FILEPAGES val:33 [ 42.209992] BUG: Bad rss-counter state mm:000000008e222681 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61477' (ECDSA) to the list of known hosts. 2023/06/19 20:51:00 fuzzer started 2023/06/19 20:51:01 dialing manager at localhost:44161 2023/06/19 20:51:01 checking machine... 2023/06/19 20:51:01 checking revisions... [ 42.944412] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:51:01 testing simple program... [ 42.991300] cgroup: Unknown subsys name 'net' [ 43.043647] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:51:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000004000 RCX=ffffffff8107f626 RDX=1ffff110011a9000 RSI=0000000000000008 RDI=ffffffff8542a6c0 RBP=ffffffff8542a6c0 RSP=ffffffff85407c80 R8 =0000000000000001 R9 =fffffbfff0a854d8 R10=ffffffff8542a6c7 R11=ffff888008c58000 R12=ffff888008d48000 R13=0000000000000000 R14=ffff888008d495c0 R15=ffff888008d495e6 RIP=ffffffff8107f65f RFL=00000046 [---Z-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 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=00007f0dda7f3850 CR3=0000000016932000 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=2030303a31353a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a31353a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ca76cc8 RCX=0000000000000000 RDX=ffff888016cf9b40 RSI=ffffffff8386b404 RDI=0000000000000007 RBP=ffff88801433fc48 RSP=ffff88801433fb20 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ca76cc9 R13=00000000000000e5 R14=ffff888008c78000 R15=ffff88800ca76c00 RIP=ffffffff814c081b RFL=00000046 [---Z-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 00007f6ed2393900 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=00007ffe4adf3000 CR3=000000000da4e000 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