syzkaller login: [ 31.248024] BUG: Bad rss-counter state mm:00000000038f5766 type:MM_FILEPAGES val:33 [ 31.249708] BUG: Bad rss-counter state mm:00000000038f5766 type:MM_ANONPAGES val:22 [ 31.421236] ================================================================== [ 31.422165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.423096] Read of size 8 at addr ffff88800fd21140 by task sshd/220 [ 31.423870] [ 31.424093] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.425129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.426088] Call Trace: [ 31.426404] [ 31.426685] dump_stack_lvl+0x91/0xf0 [ 31.427167] print_report+0xcc/0x620 [ 31.427649] ? __virt_addr_valid+0x102/0x340 [ 31.428228] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.428838] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.429449] kasan_report+0xbe/0xf0 [ 31.429922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.430535] vma_interval_tree_remove+0xc75/0xec0 [ 31.431137] vma_prepare+0xc54/0x11a0 [ 31.431620] __split_vma+0x5af/0x950 [ 31.432094] ? __pfx___split_vma+0x10/0x10 [ 31.432620] ? find_held_lock+0x2c/0x110 [ 31.433137] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.433692] ? lock_is_held_type+0x9f/0x120 [ 31.434230] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.434837] ? mtree_range_walk+0x632/0x900 [ 31.435385] ? mas_walk+0x5c7/0x7c0 [ 31.435865] do_vmi_munmap+0x1f1/0x2b0 [ 31.436355] mmap_region+0x1f9/0x2660 [ 31.436834] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.437346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.438091] ? __pfx_lock_acquire+0x10/0x10 [ 31.438640] ? __pfx_mmap_region+0x10/0x10 [ 31.439202] ? security_mmap_addr+0x7d/0xa0 [ 31.439756] ? get_unmapped_area+0x1f5/0x3f0 [ 31.440351] do_mmap+0x854/0xf00 [ 31.440801] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.441318] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.441904] ksys_mmap_pgoff+0x3af/0x500 [ 31.442434] do_syscall_64+0x3f/0x90 [ 31.442930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.443601] RIP: 0033:0x7fbb16da3d82 [ 31.444083] 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 [ 31.446313] RSP: 002b:00007fff83434268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.447278] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb16da3d82 [ 31.448166] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb161dd000 [ 31.449037] RBP: 00007fbb161dd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.449919] R10: 0000000000000812 R11: 0000000000000206 R12: 00005588754e7f60 [ 31.450804] R13: 00007fff83434280 R14: 00007fff834342b0 R15: 00007fff83434610 [ 31.451702] [ 31.452017] [ 31.452235] Allocated by task 213: [ 31.452666] kasan_save_stack+0x22/0x50 [ 31.453194] kasan_set_track+0x25/0x30 [ 31.453705] __kasan_slab_alloc+0x59/0x70 [ 31.454249] kmem_cache_alloc+0x16b/0x370 [ 31.454780] vm_area_dup+0x20/0x160 [ 31.455247] __split_vma+0x170/0x950 [ 31.455730] split_vma+0xc6/0x110 [ 31.456208] mprotect_fixup+0x8d2/0xb30 [ 31.456722] do_mprotect_pkey+0x87e/0xd40 [ 31.457266] __x64_sys_mprotect+0x78/0xc0 [ 31.457809] do_syscall_64+0x3f/0x90 [ 31.458297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.458962] [ 31.459190] Freed by task 203: [ 31.459594] kasan_save_stack+0x22/0x50 [ 31.460115] kasan_set_track+0x25/0x30 [ 31.460632] kasan_save_free_info+0x2b/0x50 [ 31.461189] __kasan_slab_free+0x10a/0x190 [ 31.461734] kmem_cache_free+0x10d/0x4d0 [ 31.462275] rcu_core+0x8c8/0x2860 [ 31.462738] __do_softirq+0x1b7/0x7d4 [ 31.463227] [ 31.463448] Last potentially related work creation: [ 31.464099] kasan_save_stack+0x22/0x50 [ 31.464631] __kasan_record_aux_stack+0x8e/0xa0 [ 31.465237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.465966] remove_vma+0x139/0x170 [ 31.466444] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.467028] do_vmi_munmap+0x1f1/0x2b0 [ 31.467539] __vm_munmap+0x138/0x3a0 [ 31.468033] __x64_sys_munmap+0x59/0x80 [ 31.468544] do_syscall_64+0x3f/0x90 [ 31.469034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.469705] [ 31.469923] Second to last potentially related work creation: [ 31.470644] kasan_save_stack+0x22/0x50 [ 31.471162] __kasan_record_aux_stack+0x8e/0xa0 [ 31.471762] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.472447] remove_vma+0x139/0x170 [ 31.472925] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.473509] do_vmi_munmap+0x1f1/0x2b0 [ 31.474006] mmap_region+0x1f9/0x2660 [ 31.474509] do_mmap+0x854/0xf00 [ 31.474957] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.475463] ksys_mmap_pgoff+0x3af/0x500 [ 31.476002] do_syscall_64+0x3f/0x90 [ 31.476496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.477169] [ 31.477395] The buggy address belongs to the object at ffff88800fd210e8 [ 31.477395] which belongs to the cache vm_area_struct of size 168 [ 31.478937] The buggy address is located 88 bytes inside of [ 31.478937] freed 168-byte region [ffff88800fd210e8, ffff88800fd21190) [ 31.480399] [ 31.480621] The buggy address belongs to the physical page: [ 31.481292] page:00000000d311880d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd21 [ 31.482423] memcg:ffff888016dbad01 [ 31.482866] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.483601] page_type: 0xffffffff() [ 31.484093] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.485031] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016dbad01 [ 31.486002] page dumped because: kasan: bad access detected [ 31.486683] [ 31.486908] Memory state around the buggy address: [ 31.487520] ffff88800fd21000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.488425] ffff88800fd21080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.489318] >ffff88800fd21100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.490203] ^ [ 31.490881] ffff88800fd21180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.491774] ffff88800fd21200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.492690] ================================================================== [ 31.493950] Disabling lock debugging due to kernel taint [ 34.370357] BUG: Bad rss-counter state mm:0000000067607e57 type:MM_FILEPAGES val:33 [ 34.371548] BUG: Bad rss-counter state mm:0000000067607e57 type:MM_ANONPAGES val:22 [ 34.900980] BUG: Bad rss-counter state mm:000000000a117e74 type:MM_FILEPAGES val:33 [ 34.901671] BUG: Bad rss-counter state mm:000000000a117e74 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64951' (ECDSA) to the list of known hosts. 2023/06/21 08:43:06 fuzzer started 2023/06/21 08:43:06 dialing manager at localhost:36067 2023/06/21 08:43:06 checking machine... 2023/06/21 08:43:06 checking revisions... [ 35.648781] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:43:06 testing simple program... [ 35.688802] cgroup: Unknown subsys name 'net' [ 35.733453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:43:06 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff861390a8 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff861390aa RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020de5 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800c6a7d50 R15=ffff88806ce09a98 RIP=ffffffff811311f6 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 00007f319e62c900 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=00007f319e5e001c CR3=0000000010036000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85e0bd1c RBX=ffffffff85e0bd1c RCX=ffffffff818d9c05 RDX=0000000000000000 RSI=ffffffff8614da06 RDI=ffffffff85e0bd18 RBP=ffffffff85e0bd1c RSP=ffff88806cf09998 R8 =ffffffff8614da06 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000244d5 R12=ffffffff85e0bd1c R13=ffffffff85e0bd18 R14=ffffffff85e0bd18 R15=dffffc0000000000 RIP=ffffffff8112fc76 RFL=00000256 [---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 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=00007fee7e210750 CR3=000000000c7c4000 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=821c19d48aa9ea85814a9192394eb023 XMM02=0000000000119cb0eff9b2d0a8fce9cb XMM03=0000000000119d802c67c8bc2e329bc3 XMM04=8f09dcb2cd3bc03600000000000ae988 XMM05=a20a3525d1532d930000000000133820 XMM06=19e9129bd510f23500000000001326b8 XMM07=fb795ef6d65770560000000000121590 XMM08=2c67c8bc2e329bc30000000000119d20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000