syzkaller login: [ 36.922083] BUG: Bad rss-counter state mm:000000006e9ae953 type:MM_FILEPAGES val:33 [ 36.923495] BUG: Bad rss-counter state mm:000000006e9ae953 type:MM_ANONPAGES val:22 [ 36.962063] ================================================================== [ 36.963162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.964281] Read of size 8 at addr ffff88801a296798 by task sshd/220 [ 36.965340] [ 36.965599] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.966659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.967820] Call Trace: [ 36.968217] [ 36.968584] dump_stack_lvl+0x91/0xf0 [ 36.969186] print_report+0xcc/0x620 [ 36.969752] ? __virt_addr_valid+0x102/0x340 [ 36.970370] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.971053] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.971735] kasan_report+0xbe/0xf0 [ 36.972261] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.972947] vma_interval_tree_remove+0xc75/0xec0 [ 36.973641] vma_prepare+0xc54/0x11a0 [ 36.974174] __split_vma+0x5af/0x950 [ 36.974693] ? __pfx___split_vma+0x10/0x10 [ 36.975276] ? find_held_lock+0x2c/0x110 [ 36.975856] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.976493] ? lock_is_held_type+0x9f/0x120 [ 36.977087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.977768] ? mtree_range_walk+0x632/0x900 [ 36.978379] ? mas_walk+0x5c7/0x7c0 [ 36.978905] do_vmi_munmap+0x1f1/0x2b0 [ 36.979450] mmap_region+0x1f9/0x2660 [ 36.979978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.980543] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.981340] ? __pfx_lock_acquire+0x10/0x10 [ 36.981955] ? __pfx_mmap_region+0x10/0x10 [ 36.982542] ? security_mmap_addr+0x7d/0xa0 [ 36.983134] ? get_unmapped_area+0x1f5/0x3f0 [ 36.983748] do_mmap+0x854/0xf00 [ 36.984228] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.984791] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.985413] ksys_mmap_pgoff+0x3af/0x500 [ 36.985988] do_syscall_64+0x3f/0x90 [ 36.986519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.987241] RIP: 0033:0x7f3fdb1a3d82 [ 36.987752] 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 [ 36.990351] RSP: 002b:00007ffe87206268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.991353] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3fdb1a3d82 [ 36.992310] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3fda5dd000 [ 36.993244] RBP: 00007f3fda5dd000 R08: 0000000000000009 R09: 0000000000001000 [ 36.994183] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e2cb7fec0 [ 36.995121] R13: 00007ffe87206280 R14: 00007ffe872062b0 R15: 00007ffe87206610 [ 36.996067] [ 36.996391] [ 36.996625] Allocated by task 213: [ 36.997100] kasan_save_stack+0x22/0x50 [ 36.997686] kasan_set_track+0x25/0x30 [ 36.998232] __kasan_slab_alloc+0x59/0x70 [ 36.998808] kmem_cache_alloc+0x16b/0x370 [ 36.999387] vm_area_dup+0x20/0x160 [ 36.999888] __split_vma+0x170/0x950 [ 37.000410] split_vma+0xc6/0x110 [ 37.000893] mprotect_fixup+0x8d2/0xb30 [ 37.001462] do_mprotect_pkey+0x87e/0xd40 [ 37.002037] __x64_sys_mprotect+0x78/0xc0 [ 37.002610] do_syscall_64+0x3f/0x90 [ 37.003135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.003847] [ 37.004082] Freed by task 13: [ 37.004512] kasan_save_stack+0x22/0x50 [ 37.005069] kasan_set_track+0x25/0x30 [ 37.005638] kasan_save_free_info+0x2b/0x50 [ 37.006234] __kasan_slab_free+0x10a/0x190 [ 37.006825] kmem_cache_free+0x10d/0x4d0 [ 37.007393] rcu_core+0x8c8/0x2860 [ 37.007879] __do_softirq+0x1b7/0x7d4 [ 37.008406] [ 37.008641] Last potentially related work creation: [ 37.009293] kasan_save_stack+0x22/0x50 [ 37.009859] __kasan_record_aux_stack+0x8e/0xa0 [ 37.010489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.011201] remove_vma+0x139/0x170 [ 37.011701] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.012329] do_vmi_munmap+0x1f1/0x2b0 [ 37.012875] __vm_munmap+0x138/0x3a0 [ 37.013393] __x64_sys_munmap+0x59/0x80 [ 37.013958] do_syscall_64+0x3f/0x90 [ 37.014484] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.015187] [ 37.015425] The buggy address belongs to the object at ffff88801a296740 [ 37.015425] which belongs to the cache vm_area_struct of size 168 [ 37.017049] The buggy address is located 88 bytes inside of [ 37.017049] freed 168-byte region [ffff88801a296740, ffff88801a2967e8) [ 37.018617] [ 37.018857] The buggy address belongs to the physical page: [ 37.019588] page:000000002cea774a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a296 [ 37.020801] memcg:ffff88800c7cc101 [ 37.021272] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.022012] page_type: 0xffffffff() [ 37.022513] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.023532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7cc101 [ 37.024544] page dumped because: kasan: bad access detected [ 37.025272] [ 37.025515] Memory state around the buggy address: [ 37.026160] ffff88801a296680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.027114] ffff88801a296700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.028067] >ffff88801a296780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.029009] ^ [ 37.029573] ffff88801a296800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.030533] ffff88801a296880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.031484] ================================================================== [ 37.032504] Disabling lock debugging due to kernel taint [ 39.099728] BUG: Bad rss-counter state mm:000000008991e437 type:MM_FILEPAGES val:33 [ 39.100932] BUG: Bad rss-counter state mm:000000008991e437 type:MM_ANONPAGES val:22 [ 39.539994] BUG: Bad rss-counter state mm:00000000fe4bca87 type:MM_FILEPAGES val:33 [ 39.540969] BUG: Bad rss-counter state mm:00000000fe4bca87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2644' (ECDSA) to the list of known hosts. 2023/06/19 14:36:17 fuzzer started 2023/06/19 14:36:17 dialing manager at localhost:44161 2023/06/19 14:36:17 checking machine... 2023/06/19 14:36:17 checking revisions... [ 40.278355] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:36:17 testing simple program... [ 40.331235] cgroup: Unknown subsys name 'net' [ 40.370555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:36:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=000055c18bd96cd0 CR3=000000000e6a0000 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=2036313a36333a3431203931206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a383732373420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a36333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77da RBX=1ffff11001b55e7f RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800daaf3c8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180ef1a RFL=00000282 [--S----] 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 00007f319471e900 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=00007f32cd305650 CR3=000000000dae0000 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=d8aa546c568d71b67b42af3ce834db44 XMM02=eff9b2d0a8fce9cb000000000011c6c8 XMM03=2c67c8bc2e329bc3000000000011c7f0 XMM04=6178d932c6bf9cb500000000000ae988 XMM05=1aa653b41f75d0740000000000134c48 XMM06=c291bd5c70af25b90000000000133a38 XMM07=fb795ef6d65770560000000000124060 XMM08=2c67c8bc2e329bc3000000000011c7f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000