syzkaller login: [ 28.553845] BUG: Bad rss-counter state mm:000000005b77c757 type:MM_FILEPAGES val:33 [ 28.555249] BUG: Bad rss-counter state mm:000000005b77c757 type:MM_ANONPAGES val:22 [ 28.739434] ================================================================== [ 28.740584] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.741870] Read of size 8 at addr ffff8880097bc310 by task sshd/220 [ 28.742789] [ 28.743021] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.743968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.745025] Call Trace: [ 28.745366] [ 28.745669] dump_stack_lvl+0x91/0xf0 [ 28.746235] print_report+0xcc/0x620 [ 28.746784] ? __virt_addr_valid+0x102/0x340 [ 28.747387] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.748070] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.748739] kasan_report+0xbe/0xf0 [ 28.749254] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.749953] vma_interval_tree_remove+0xc75/0xec0 [ 28.750622] vma_prepare+0xc54/0x11a0 [ 28.751148] __split_vma+0x5af/0x950 [ 28.751674] ? __pfx___split_vma+0x10/0x10 [ 28.752275] ? find_held_lock+0x2c/0x110 [ 28.752877] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.753506] ? lock_is_held_type+0x9f/0x120 [ 28.754133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.754841] ? mtree_range_walk+0x632/0x900 [ 28.755458] ? mas_walk+0x5c7/0x7c0 [ 28.756003] do_vmi_munmap+0x1f1/0x2b0 [ 28.756552] mmap_region+0x1f9/0x2660 [ 28.757104] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.757684] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.758534] ? __pfx_lock_acquire+0x10/0x10 [ 28.759155] ? __pfx_mmap_region+0x10/0x10 [ 28.759779] ? security_mmap_addr+0x7d/0xa0 [ 28.760548] ? get_unmapped_area+0x1f5/0x3f0 [ 28.761255] do_mmap+0x854/0xf00 [ 28.761771] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.762508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.763212] ksys_mmap_pgoff+0x3af/0x500 [ 28.763796] do_syscall_64+0x3f/0x90 [ 28.764333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.765067] RIP: 0033:0x7fa91260dd82 [ 28.765582] 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 [ 28.768023] RSP: 002b:00007ffd7c87be68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.769059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa91260dd82 [ 28.770031] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa911a47000 [ 28.770999] RBP: 00007fa911a47000 R08: 0000000000000009 R09: 0000000000001000 [ 28.771958] R10: 0000000000000812 R11: 0000000000000206 R12: 000056007ba2cec0 [ 28.772915] R13: 00007ffd7c87be80 R14: 00007ffd7c87beb0 R15: 00007ffd7c87c210 [ 28.773895] [ 28.774222] [ 28.774459] Allocated by task 213: [ 28.774975] kasan_save_stack+0x22/0x50 [ 28.775538] kasan_set_track+0x25/0x30 [ 28.776098] __kasan_slab_alloc+0x59/0x70 [ 28.776690] kmem_cache_alloc+0x16b/0x370 [ 28.777283] vm_area_dup+0x20/0x160 [ 28.777814] __split_vma+0x170/0x950 [ 28.778332] split_vma+0xc6/0x110 [ 28.778852] mprotect_fixup+0x8d2/0xb30 [ 28.779413] do_mprotect_pkey+0x87e/0xd40 [ 28.780013] __x64_sys_mprotect+0x78/0xc0 [ 28.780595] do_syscall_64+0x3f/0x90 [ 28.781134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.781877] [ 28.782117] Freed by task 213: [ 28.782566] kasan_save_stack+0x22/0x50 [ 28.783145] kasan_set_track+0x25/0x30 [ 28.783703] kasan_save_free_info+0x2b/0x50 [ 28.784304] __kasan_slab_free+0x10a/0x190 [ 28.784922] kmem_cache_free+0x10d/0x4d0 [ 28.785488] rcu_core+0x8c8/0x2860 [ 28.786006] __do_softirq+0x1b7/0x7d4 [ 28.786555] [ 28.786811] Last potentially related work creation: [ 28.787465] kasan_save_stack+0x22/0x50 [ 28.788039] __kasan_record_aux_stack+0x8e/0xa0 [ 28.788689] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.789417] remove_vma+0x139/0x170 [ 28.789959] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.790594] do_vmi_munmap+0x1f1/0x2b0 [ 28.791147] __vm_munmap+0x138/0x3a0 [ 28.791670] __x64_sys_munmap+0x59/0x80 [ 28.792244] do_syscall_64+0x3f/0x90 [ 28.792790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.793533] [ 28.793796] Second to last potentially related work creation: [ 28.794566] kasan_save_stack+0x22/0x50 [ 28.795136] __kasan_record_aux_stack+0x8e/0xa0 [ 28.795800] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.796515] remove_vma+0x139/0x170 [ 28.797030] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.797652] do_vmi_munmap+0x1f1/0x2b0 [ 28.798217] mmap_region+0x1f9/0x2660 [ 28.798768] do_mmap+0x854/0xf00 [ 28.799250] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.799809] ksys_mmap_pgoff+0x3af/0x500 [ 28.800373] do_syscall_64+0x3f/0x90 [ 28.800911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.801637] [ 28.801900] The buggy address belongs to the object at ffff8880097bc2b8 [ 28.801900] which belongs to the cache vm_area_struct of size 168 [ 28.803594] The buggy address is located 88 bytes inside of [ 28.803594] freed 168-byte region [ffff8880097bc2b8, ffff8880097bc360) [ 28.805225] [ 28.805535] The buggy address belongs to the physical page: [ 28.806494] page:000000000e3b8dc9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97bc [ 28.808026] memcg:ffff88800e8ecb01 [ 28.808632] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.809559] page_type: 0xffffffff() [ 28.810207] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c0ac0 dead000000000006 [ 28.811534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8ecb01 [ 28.812587] page dumped because: kasan: bad access detected [ 28.813348] [ 28.813589] Memory state around the buggy address: [ 28.814251] ffff8880097bc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.815242] ffff8880097bc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 28.816242] >ffff8880097bc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 28.817199] ^ [ 28.817732] ffff8880097bc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 28.818729] ffff8880097bc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 28.819691] ================================================================== [ 28.820990] Disabling lock debugging due to kernel taint [ 31.473516] BUG: Bad rss-counter state mm:00000000af3e2862 type:MM_FILEPAGES val:33 [ 31.474600] BUG: Bad rss-counter state mm:00000000af3e2862 type:MM_ANONPAGES val:22 [ 31.936817] BUG: Bad rss-counter state mm:00000000905eb131 type:MM_FILEPAGES val:33 [ 31.937894] BUG: Bad rss-counter state mm:00000000905eb131 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39715' (ECDSA) to the list of known hosts. 2023/06/21 07:54:25 fuzzer started 2023/06/21 07:54:25 dialing manager at localhost:36067 2023/06/21 07:54:25 checking machine... 2023/06/21 07:54:25 checking revisions... [ 32.634590] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:54:25 testing simple program... [ 32.696161] cgroup: Unknown subsys name 'net' [ 32.764529] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:54:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100d9c13a2 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806ce09cf8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88801a964278 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000056 [---ZAP-] 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 00007f1def818900 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=00007f1defdcd650 CR3=000000000ca9a000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=ffff888008c04400 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=00007ffd5a5a5ae8 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=00007f81dd020510000055899a44b790 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