syzkaller login: [ 30.220197] BUG: Bad rss-counter state mm:00000000ad3b565d type:MM_FILEPAGES val:33 [ 30.221697] BUG: Bad rss-counter state mm:00000000ad3b565d type:MM_ANONPAGES val:22 [ 30.385022] ================================================================== [ 30.385911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.386866] Read of size 8 at addr ffff88801a3355c8 by task sshd/219 [ 30.387627] [ 30.387849] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.388896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.389862] Call Trace: [ 30.390181] [ 30.390463] dump_stack_lvl+0x91/0xf0 [ 30.390993] print_report+0xcc/0x620 [ 30.391475] ? __virt_addr_valid+0x102/0x340 [ 30.392024] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.392636] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.393248] kasan_report+0xbe/0xf0 [ 30.393720] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.394346] vma_interval_tree_remove+0xc75/0xec0 [ 30.394991] vma_prepare+0xc54/0x11a0 [ 30.395469] __split_vma+0x5af/0x950 [ 30.395935] ? __pfx___split_vma+0x10/0x10 [ 30.396458] ? find_held_lock+0x2c/0x110 [ 30.396978] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.397548] ? lock_is_held_type+0x9f/0x120 [ 30.398104] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.398751] ? mtree_range_walk+0x632/0x900 [ 30.399306] ? mas_walk+0x5c7/0x7c0 [ 30.399781] do_vmi_munmap+0x1f1/0x2b0 [ 30.400271] mmap_region+0x1f9/0x2660 [ 30.400747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.401259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.401972] ? __pfx_lock_acquire+0x10/0x10 [ 30.402502] ? __pfx_mmap_region+0x10/0x10 [ 30.403071] ? security_mmap_addr+0x7d/0xa0 [ 30.403599] ? get_unmapped_area+0x1f5/0x3f0 [ 30.404151] do_mmap+0x854/0xf00 [ 30.404589] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.405089] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.405647] ksys_mmap_pgoff+0x3af/0x500 [ 30.406157] do_syscall_64+0x3f/0x90 [ 30.406683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.407327] RIP: 0033:0x7f1d3dd71d82 [ 30.407785] 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 [ 30.409899] RSP: 002b:00007ffda4f35c58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.410845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d3dd71d82 [ 30.411690] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d3d1ab000 [ 30.412542] RBP: 00007f1d3d1ab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.413378] R10: 0000000000000812 R11: 0000000000000206 R12: 000055878947cec0 [ 30.414224] R13: 00007ffda4f35c70 R14: 00007ffda4f35ca0 R15: 00007ffda4f36000 [ 30.415114] [ 30.415409] [ 30.415624] Allocated by task 212: [ 30.416057] kasan_save_stack+0x22/0x50 [ 30.416580] kasan_set_track+0x25/0x30 [ 30.417088] __kasan_slab_alloc+0x59/0x70 [ 30.417637] kmem_cache_alloc+0x16b/0x370 [ 30.418174] vm_area_dup+0x20/0x160 [ 30.418685] __split_vma+0x170/0x950 [ 30.419178] split_vma+0xc6/0x110 [ 30.419633] mprotect_fixup+0x8d2/0xb30 [ 30.420162] do_mprotect_pkey+0x87e/0xd40 [ 30.420704] __x64_sys_mprotect+0x78/0xc0 [ 30.421246] do_syscall_64+0x3f/0x90 [ 30.421746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.422412] [ 30.422664] Freed by task 212: [ 30.423074] kasan_save_stack+0x22/0x50 [ 30.423588] kasan_set_track+0x25/0x30 [ 30.424116] kasan_save_free_info+0x2b/0x50 [ 30.424680] __kasan_slab_free+0x10a/0x190 [ 30.425230] kmem_cache_free+0x10d/0x4d0 [ 30.425764] rcu_core+0x8c8/0x2860 [ 30.426228] __do_softirq+0x1b7/0x7d4 [ 30.426754] [ 30.426979] Last potentially related work creation: [ 30.427583] kasan_save_stack+0x22/0x50 [ 30.428103] __kasan_record_aux_stack+0x8e/0xa0 [ 30.428696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.429372] remove_vma+0x139/0x170 [ 30.429841] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.430416] do_vmi_munmap+0x1f1/0x2b0 [ 30.430944] __vm_munmap+0x138/0x3a0 [ 30.431426] __x64_sys_munmap+0x59/0x80 [ 30.431942] do_syscall_64+0x3f/0x90 [ 30.432432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.433088] [ 30.433311] The buggy address belongs to the object at ffff88801a335570 [ 30.433311] which belongs to the cache vm_area_struct of size 168 [ 30.434861] The buggy address is located 88 bytes inside of [ 30.434861] freed 168-byte region [ffff88801a335570, ffff88801a335618) [ 30.436313] [ 30.436540] The buggy address belongs to the physical page: [ 30.437224] page:00000000cdda89a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a335 [ 30.438363] memcg:ffff88800e452901 [ 30.438846] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.439514] page_type: 0xffffffff() [ 30.439985] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.440943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e452901 [ 30.441888] page dumped because: kasan: bad access detected [ 30.442605] [ 30.442830] Memory state around the buggy address: [ 30.443434] ffff88801a335480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.444318] ffff88801a335500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.445204] >ffff88801a335580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.446103] ^ [ 30.446838] ffff88801a335600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.447750] ffff88801a335680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.448658] ================================================================== [ 30.449751] Disabling lock debugging due to kernel taint [ 32.384059] BUG: Bad rss-counter state mm:00000000c84f028f type:MM_FILEPAGES val:33 [ 32.385173] BUG: Bad rss-counter state mm:00000000c84f028f type:MM_ANONPAGES val:22 [ 32.883084] BUG: Bad rss-counter state mm:000000004c718854 type:MM_FILEPAGES val:33 [ 32.884430] BUG: Bad rss-counter state mm:000000004c718854 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2749' (ECDSA) to the list of known hosts. 2023/06/20 11:51:42 fuzzer started 2023/06/20 11:51:42 dialing manager at localhost:36067 2023/06/20 11:51:43 checking machine... 2023/06/20 11:51:43 checking revisions... [ 33.634833] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:51:43 testing simple program... [ 33.685517] cgroup: Unknown subsys name 'net' [ 33.729590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:51:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f45931e7fd0 CR3=0000000008c7a000 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=06406ef1655bc0bc1247ba2dbf83a584 XMM02=000000000011d980ec2efd57dc4c00df XMM03=0000000000121e50b9d2632f53db0738 XMM04=1717490725658aa800000000000ae988 XMM05=dfcdbad4f1609c370000000000131ff8 XMM06=806171799158d9670000000000131e80 XMM07=e042d86d42eb936e00000000001220d0 XMM08=b9d2632f53db0738000000000011d9e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88801026b680 RSI=ffffffff8215b546 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff8880145c79c0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000001000 R13=ffffea00006b9240 R14=0000000000001000 R15=ffff8880145c7db0 RIP=ffffffff814c0880 RFL=00000246 [---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 00007f7af7703900 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=00007fff6cd89000 CR3=000000000ecb4000 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=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