syzkaller login: [ 44.232290] BUG: Bad rss-counter state mm:00000000f48e544e type:MM_FILEPAGES val:33 [ 44.233492] BUG: Bad rss-counter state mm:00000000f48e544e type:MM_ANONPAGES val:22 [ 44.397393] ================================================================== [ 44.398581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.399576] Read of size 8 at addr ffff88800db95c20 by task sshd/224 [ 44.400601] [ 44.400812] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.401675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.402831] Call Trace: [ 44.403165] [ 44.403497] dump_stack_lvl+0x91/0xf0 [ 44.404076] print_report+0xcc/0x620 [ 44.404586] ? __virt_addr_valid+0x102/0x340 [ 44.405113] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.405713] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.406296] kasan_report+0xbe/0xf0 [ 44.406749] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.407331] vma_interval_tree_remove+0xc75/0xec0 [ 44.407896] vma_prepare+0xc54/0x11a0 [ 44.408352] __split_vma+0x5af/0x950 [ 44.408797] ? __pfx___split_vma+0x10/0x10 [ 44.409299] ? find_held_lock+0x2c/0x110 [ 44.409837] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.410500] ? lock_is_held_type+0x9f/0x120 [ 44.411133] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.411786] ? mtree_range_walk+0x632/0x900 [ 44.412320] ? mas_walk+0x5c7/0x7c0 [ 44.412780] do_vmi_munmap+0x1f1/0x2b0 [ 44.413255] mmap_region+0x1f9/0x2660 [ 44.413737] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.414226] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.414901] ? __pfx_lock_acquire+0x10/0x10 [ 44.415412] ? __pfx_mmap_region+0x10/0x10 [ 44.415915] ? security_mmap_addr+0x7d/0xa0 [ 44.416428] ? get_unmapped_area+0x1f5/0x3f0 [ 44.416951] do_mmap+0x854/0xf00 [ 44.417374] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.417873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.418410] ksys_mmap_pgoff+0x3af/0x500 [ 44.418894] do_syscall_64+0x3f/0x90 [ 44.419349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.419962] RIP: 0033:0x7ff452c98d82 [ 44.420397] 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 [ 44.422762] RSP: 002b:00007ffcb2aeee98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.423845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff452c98d82 [ 44.424867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4520d2000 [ 44.425846] RBP: 00007ff4520d2000 R08: 0000000000000009 R09: 0000000000001000 [ 44.426879] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561111076b20 [ 44.427914] R13: 00007ffcb2aeeeb0 R14: 00007ffcb2aeeee0 R15: 00007ffcb2aef240 [ 44.428915] [ 44.429222] [ 44.429440] Allocated by task 217: [ 44.429886] kasan_save_stack+0x22/0x50 [ 44.430397] kasan_set_track+0x25/0x30 [ 44.430890] __kasan_slab_alloc+0x59/0x70 [ 44.431504] kmem_cache_alloc+0x16b/0x370 [ 44.432055] vm_area_dup+0x20/0x160 [ 44.432494] __split_vma+0x170/0x950 [ 44.432938] split_vma+0xc6/0x110 [ 44.433352] mprotect_fixup+0x8d2/0xb30 [ 44.433854] do_mprotect_pkey+0x87e/0xd40 [ 44.434375] __x64_sys_mprotect+0x78/0xc0 [ 44.434998] do_syscall_64+0x3f/0x90 [ 44.435566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.436215] [ 44.436420] Freed by task 203: [ 44.436793] kasan_save_stack+0x22/0x50 [ 44.437273] kasan_set_track+0x25/0x30 [ 44.437752] kasan_save_free_info+0x2b/0x50 [ 44.438258] __kasan_slab_free+0x10a/0x190 [ 44.438764] kmem_cache_free+0x10d/0x4d0 [ 44.439250] rcu_core+0x8c8/0x2860 [ 44.439673] __do_softirq+0x1b7/0x7d4 [ 44.440126] [ 44.440339] Last potentially related work creation: [ 44.440893] kasan_save_stack+0x22/0x50 [ 44.441373] __kasan_record_aux_stack+0x8e/0xa0 [ 44.441932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.442549] remove_vma+0x139/0x170 [ 44.442980] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.443508] do_vmi_munmap+0x1f1/0x2b0 [ 44.443981] __vm_munmap+0x138/0x3a0 [ 44.444425] __x64_sys_munmap+0x59/0x80 [ 44.444896] do_syscall_64+0x3f/0x90 [ 44.445353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.445986] [ 44.446197] The buggy address belongs to the object at ffff88800db95bc8 [ 44.446197] which belongs to the cache vm_area_struct of size 168 [ 44.447612] The buggy address is located 88 bytes inside of [ 44.447612] freed 168-byte region [ffff88800db95bc8, ffff88800db95c70) [ 44.449127] [ 44.449347] The buggy address belongs to the physical page: [ 44.450019] page:00000000ab9c8c18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb95 [ 44.451083] memcg:ffff88800d4d9701 [ 44.451505] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.452149] page_type: 0xffffffff() [ 44.452599] raw: 0100000000000200 ffff88800879fc80 ffffea000036d640 dead000000000006 [ 44.453514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4d9701 [ 44.454448] page dumped because: kasan: bad access detected [ 44.455121] [ 44.455337] Memory state around the buggy address: [ 44.455927] ffff88800db95b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.456780] ffff88800db95b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 44.457645] >ffff88800db95c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 44.458498] ^ [ 44.459033] ffff88800db95c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 44.459895] ffff88800db95d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 44.460737] ================================================================== [ 44.461761] Disabling lock debugging due to kernel taint [ 46.147963] BUG: Bad rss-counter state mm:000000008abe47af type:MM_FILEPAGES val:158 [ 46.149089] BUG: Bad rss-counter state mm:000000008abe47af type:MM_ANONPAGES val:50 [ 46.409488] BUG: Bad rss-counter state mm:00000000bd1bf24c type:MM_FILEPAGES val:33 [ 46.410605] BUG: Bad rss-counter state mm:00000000bd1bf24c type:MM_ANONPAGES val:22 [ 46.842204] BUG: Bad rss-counter state mm:0000000087bfe9bf type:MM_FILEPAGES val:33 [ 46.843262] BUG: Bad rss-counter state mm:0000000087bfe9bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55495' (ECDSA) to the list of known hosts. 2023/06/19 20:17:02 fuzzer started 2023/06/19 20:17:02 dialing manager at localhost:44161 2023/06/19 20:17:02 checking machine... 2023/06/19 20:17:02 checking revisions... [ 47.484379] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:17:02 testing simple program... [ 47.537166] cgroup: Unknown subsys name 'net' [ 47.586672] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:16:57 Registers: info registers vcpu 0 RAX=ffffffff8180995d RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011aff3a RSI=ffffffff8180995d RDI=ffff888008d7fa40 RBP=ffff888008d7fa10 RSP=ffff888008d7f970 R8 =0000000000000001 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020dae R12=ffff888008d7fa40 R13=0000000000000000 R14=ffff888008d70000 R15=ffff8880167568d0 RIP=ffffffff813ad420 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 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=00007f25fe0590b0 CR3=0000000019f8c000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c585 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11002056f46 RSI=ffffffff8180c585 RDI=ffff8880102b7aa0 RBP=ffff8880102b7a70 RSP=ffff8880102b79d0 R8 =ffffffff8613751e R9 =ffff8880102b7a18 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880102b7aa0 R13=0000000000000000 R14=ffff88800fc01b40 R15=dffffc0000000000 RIP=ffffffff813ad420 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 00007f07220b8900 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=00007f072152dd90 CR3=000000000c7b8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=35cdcd277749db3600000000000ae988 XMM05=df6a1425afe9eefc0000000000136ca8 XMM06=0b39c798a71319b600000000001353e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000