syzkaller login: [ 59.250220] BUG: Bad rss-counter state mm:00000000351f27e5 type:MM_FILEPAGES val:33 [ 59.251638] BUG: Bad rss-counter state mm:00000000351f27e5 type:MM_ANONPAGES val:22 [ 59.403058] ================================================================== [ 59.403982] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.404931] Read of size 8 at addr ffff88800c70a310 by task sshd/220 [ 59.405730] [ 59.405953] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 59.406920] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.407902] Call Trace: [ 59.408245] [ 59.408529] dump_stack_lvl+0x91/0xf0 [ 59.409031] print_report+0xcc/0x620 [ 59.409526] ? __virt_addr_valid+0x102/0x340 [ 59.410091] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.410731] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.411359] kasan_report+0xbe/0xf0 [ 59.411854] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.412515] vma_interval_tree_remove+0xc75/0xec0 [ 59.413171] vma_prepare+0xc54/0x11a0 [ 59.413685] __split_vma+0x5af/0x950 [ 59.414200] ? __pfx___split_vma+0x10/0x10 [ 59.414775] ? find_held_lock+0x2c/0x110 [ 59.415328] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.415927] ? lock_is_held_type+0x9f/0x120 [ 59.416487] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.417137] ? mtree_range_walk+0x632/0x900 [ 59.417699] ? mas_walk+0x5c7/0x7c0 [ 59.418186] do_vmi_munmap+0x1f1/0x2b0 [ 59.418695] mmap_region+0x1f9/0x2660 [ 59.419192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.419714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.420447] ? __pfx_lock_acquire+0x10/0x10 [ 59.421022] ? __pfx_mmap_region+0x10/0x10 [ 59.421576] ? security_mmap_addr+0x7d/0xa0 [ 59.422113] ? get_unmapped_area+0x1f5/0x3f0 [ 59.422665] do_mmap+0x854/0xf00 [ 59.423107] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.423600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.424183] ksys_mmap_pgoff+0x3af/0x500 [ 59.424730] do_syscall_64+0x3f/0x90 [ 59.425209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.425862] RIP: 0033:0x7fc5c563dd82 [ 59.426332] 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 [ 59.428493] RSP: 002b:00007ffeed8ba4f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.429431] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5c563dd82 [ 59.430298] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5c4a77000 [ 59.431152] RBP: 00007fc5c4a77000 R08: 0000000000000009 R09: 0000000000001000 [ 59.432016] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606b4d88d90 [ 59.432892] R13: 00007ffeed8ba510 R14: 00007ffeed8ba540 R15: 00007ffeed8ba8a0 [ 59.433764] [ 59.434058] [ 59.434277] Allocated by task 213: [ 59.434714] kasan_save_stack+0x22/0x50 [ 59.435235] kasan_set_track+0x25/0x30 [ 59.435750] __kasan_slab_alloc+0x59/0x70 [ 59.436289] kmem_cache_alloc+0x16b/0x370 [ 59.436842] vm_area_dup+0x20/0x160 [ 59.437302] __split_vma+0x170/0x950 [ 59.437774] split_vma+0xc6/0x110 [ 59.438223] mprotect_fixup+0x8d2/0xb30 [ 59.438730] do_mprotect_pkey+0x87e/0xd40 [ 59.439255] __x64_sys_mprotect+0x78/0xc0 [ 59.439779] do_syscall_64+0x3f/0x90 [ 59.440252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.440920] [ 59.441142] Freed by task 19: [ 59.441543] kasan_save_stack+0x22/0x50 [ 59.442054] kasan_set_track+0x25/0x30 [ 59.442549] kasan_save_free_info+0x2b/0x50 [ 59.443084] __kasan_slab_free+0x10a/0x190 [ 59.443631] kmem_cache_free+0x10d/0x4d0 [ 59.444153] rcu_core+0x8c8/0x2860 [ 59.444622] __do_softirq+0x1b7/0x7d4 [ 59.445116] [ 59.445331] Last potentially related work creation: [ 59.445928] kasan_save_stack+0x22/0x50 [ 59.446451] __kasan_record_aux_stack+0x8e/0xa0 [ 59.447042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.447686] remove_vma+0x139/0x170 [ 59.448146] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.448719] do_vmi_munmap+0x1f1/0x2b0 [ 59.449206] __vm_munmap+0x138/0x3a0 [ 59.449671] __x64_sys_munmap+0x59/0x80 [ 59.450182] do_syscall_64+0x3f/0x90 [ 59.450659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.451311] [ 59.451531] The buggy address belongs to the object at ffff88800c70a2b8 [ 59.451531] which belongs to the cache vm_area_struct of size 168 [ 59.453048] The buggy address is located 88 bytes inside of [ 59.453048] freed 168-byte region [ffff88800c70a2b8, ffff88800c70a360) [ 59.454471] [ 59.454688] The buggy address belongs to the physical page: [ 59.455345] page:00000000b292243f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc70a [ 59.456434] memcg:ffff888013fb7b01 [ 59.456881] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.457529] page_type: 0xffffffff() [ 59.457982] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 59.458908] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fb7b01 [ 59.459832] page dumped because: kasan: bad access detected [ 59.460507] [ 59.460746] Memory state around the buggy address: [ 59.461329] ffff88800c70a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 59.462203] ffff88800c70a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 59.463066] >ffff88800c70a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 59.463931] ^ [ 59.464407] ffff88800c70a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 59.465287] ffff88800c70a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 59.466160] ================================================================== [ 59.467160] Disabling lock debugging due to kernel taint [ 61.403592] BUG: Bad rss-counter state mm:00000000df30735a type:MM_FILEPAGES val:33 [ 61.404471] BUG: Bad rss-counter state mm:00000000df30735a type:MM_ANONPAGES val:22 [ 61.922944] BUG: Bad rss-counter state mm:000000008e6a5dd3 type:MM_FILEPAGES val:33 [ 61.923937] BUG: Bad rss-counter state mm:000000008e6a5dd3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11115' (ECDSA) to the list of known hosts. 2023/06/19 23:28:36 fuzzer started 2023/06/19 23:28:37 dialing manager at localhost:44161 2023/06/19 23:28:37 checking machine... 2023/06/19 23:28:37 checking revisions... [ 62.633591] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:28:37 testing simple program... [ 62.665614] cgroup: Unknown subsys name 'net' [ 62.697599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:08 Registers: info registers vcpu 0 RAX=1ffffffff0c2ac46 RBX=0000000000000001 RCX=ffffffff86156234 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880145ff500 RSP=ffff8880145ff438 R8 =ffffffff86156238 R9 =ffff8880145ff4e8 R10=0000000000038001 R11=0000000000025fbc R12=ffff8880145ff508 R13=ffff8880145ff4f0 R14=ffff8880145ff9b8 R15=ffff8880145ff4a8 RIP=ffffffff81130b73 RFL=00000213 [----A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2628c10900 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=00007f2628027110 CR3=000000000c718000 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=64657669656365523d4547415353454d XMM01=342074726f7020322e322e302e303120 XMM02=63736964203a31313a38313836342074 XMM03=66207463656e6e6f6373696420646576 XMM04=351386debea710cb00000000000ae988 XMM05=1319e678c5640f8a0000000000134f28 XMM06=94aac670ef06ff650000000000134e90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9e13a3 RSP=ffff88806cf09d08 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888019b24738 R13=ffffffff81846723 R14=ffffffff818d9dc6 R15=ffff88800da46100 RIP=ffffffff812d86e0 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 00007f064f27e900 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=00007ffc4b8f9000 CR3=000000000df72000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000