syzkaller login: [ 35.191127] BUG: Bad rss-counter state mm:00000000d290d640 type:MM_FILEPAGES val:33 [ 35.192138] BUG: Bad rss-counter state mm:00000000d290d640 type:MM_ANONPAGES val:22 [ 35.349688] ================================================================== [ 35.350599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.351542] Read of size 8 at addr ffff888018fdbed8 by task sshd/221 [ 35.352325] [ 35.352542] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.353600] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.354572] Call Trace: [ 35.354893] [ 35.355185] dump_stack_lvl+0x91/0xf0 [ 35.355684] print_report+0xcc/0x620 [ 35.356176] ? __virt_addr_valid+0x102/0x340 [ 35.356729] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.357379] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.358002] kasan_report+0xbe/0xf0 [ 35.358481] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.359108] vma_interval_tree_remove+0xc75/0xec0 [ 35.359725] vma_prepare+0xc54/0x11a0 [ 35.360213] __split_vma+0x5af/0x950 [ 35.360688] ? __pfx___split_vma+0x10/0x10 [ 35.361244] ? find_held_lock+0x2c/0x110 [ 35.361773] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.362360] ? lock_is_held_type+0x9f/0x120 [ 35.362914] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.363531] ? mtree_range_walk+0x632/0x900 [ 35.364067] ? mas_walk+0x5c7/0x7c0 [ 35.364529] do_vmi_munmap+0x1f1/0x2b0 [ 35.365011] mmap_region+0x1f9/0x2660 [ 35.365500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.366000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.366696] ? __pfx_lock_acquire+0x10/0x10 [ 35.367217] ? __pfx_mmap_region+0x10/0x10 [ 35.367733] ? security_mmap_addr+0x7d/0xa0 [ 35.368252] ? get_unmapped_area+0x1f5/0x3f0 [ 35.368789] do_mmap+0x854/0xf00 [ 35.369224] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.369710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.370260] ksys_mmap_pgoff+0x3af/0x500 [ 35.370755] do_syscall_64+0x3f/0x90 [ 35.371226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.371856] RIP: 0033:0x7f28cde8ad82 [ 35.372305] 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 [ 35.374389] RSP: 002b:00007ffd4a509498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.375265] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f28cde8ad82 [ 35.376095] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f28cd2c4000 [ 35.376919] RBP: 00007f28cd2c4000 R08: 0000000000000009 R09: 0000000000001000 [ 35.377764] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639bec0cb20 [ 35.378585] R13: 00007ffd4a5094b0 R14: 00007ffd4a5094e0 R15: 00007ffd4a509840 [ 35.379421] [ 35.379704] [ 35.379913] Allocated by task 214: [ 35.380331] kasan_save_stack+0x22/0x50 [ 35.380820] kasan_set_track+0x25/0x30 [ 35.381314] __kasan_slab_alloc+0x59/0x70 [ 35.381822] kmem_cache_alloc+0x16b/0x370 [ 35.382325] vm_area_dup+0x20/0x160 [ 35.382765] __split_vma+0x170/0x950 [ 35.383219] split_vma+0xc6/0x110 [ 35.383649] mprotect_fixup+0x8d2/0xb30 [ 35.384139] do_mprotect_pkey+0x87e/0xd40 [ 35.384644] __x64_sys_mprotect+0x78/0xc0 [ 35.385152] do_syscall_64+0x3f/0x90 [ 35.385630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.386257] [ 35.386474] Freed by task 214: [ 35.386859] kasan_save_stack+0x22/0x50 [ 35.387354] kasan_set_track+0x25/0x30 [ 35.387835] kasan_save_free_info+0x2b/0x50 [ 35.388356] __kasan_slab_free+0x10a/0x190 [ 35.388874] kmem_cache_free+0x10d/0x4d0 [ 35.389382] rcu_core+0x8c8/0x2860 [ 35.389813] __do_softirq+0x1b7/0x7d4 [ 35.390278] [ 35.390487] Last potentially related work creation: [ 35.391058] kasan_save_stack+0x22/0x50 [ 35.391549] __kasan_record_aux_stack+0x8e/0xa0 [ 35.392106] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.392736] remove_vma+0x139/0x170 [ 35.393186] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.393731] do_vmi_munmap+0x1f1/0x2b0 [ 35.394203] __vm_munmap+0x138/0x3a0 [ 35.394700] __x64_sys_munmap+0x59/0x80 [ 35.395183] do_syscall_64+0x3f/0x90 [ 35.395644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.396272] [ 35.396481] The buggy address belongs to the object at ffff888018fdbe80 [ 35.396481] which belongs to the cache vm_area_struct of size 168 [ 35.397912] The buggy address is located 88 bytes inside of [ 35.397912] freed 168-byte region [ffff888018fdbe80, ffff888018fdbf28) [ 35.399273] [ 35.399485] The buggy address belongs to the physical page: [ 35.400129] page:0000000070e4c699 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18fdb [ 35.401201] memcg:ffff88800e53e401 [ 35.401618] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.402246] page_type: 0xffffffff() [ 35.402685] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.403576] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e53e401 [ 35.404452] page dumped because: kasan: bad access detected [ 35.405095] [ 35.405320] Memory state around the buggy address: [ 35.405887] ffff888018fdbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.406722] ffff888018fdbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.407551] >ffff888018fdbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.408374] ^ [ 35.409080] ffff888018fdbf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.409913] ffff888018fdbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.410742] ================================================================== [ 35.411712] Disabling lock debugging due to kernel taint [ 37.459480] BUG: Bad rss-counter state mm:00000000bd8af52e type:MM_FILEPAGES val:33 [ 37.460462] BUG: Bad rss-counter state mm:00000000bd8af52e type:MM_ANONPAGES val:22 [ 37.952099] BUG: Bad rss-counter state mm:000000003a0c574f type:MM_FILEPAGES val:33 [ 37.953114] BUG: Bad rss-counter state mm:000000003a0c574f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37392' (ECDSA) to the list of known hosts. 2023/06/20 01:18:37 fuzzer started 2023/06/20 01:18:37 dialing manager at localhost:44161 2023/06/20 01:18:37 checking machine... 2023/06/20 01:18:37 checking revisions... [ 38.696222] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:18:37 testing simple program... [ 38.745633] cgroup: Unknown subsys name 'net' [ 38.788277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:18:32 Registers: info registers vcpu 0 RAX=1ffffffff0bc171a RBX=ffffffff85e0b8d4 RCX=ffffffff818e8f19 RDX=0000000000000000 RSI=ffffffff8614db4c RDI=ffffffff85e0b8d4 RBP=ffffffff85e0b8d4 RSP=ffff888015e7f9e8 R8 =ffffffff8614db4c R9 =ffff888015e7fae0 R10=0000000000038001 R11=0000000000024940 R12=ffffffff85e0b8d8 R13=ffffffff85e0b8d4 R14=ffffffff85e0b8d4 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5dfecbc900 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=00007f5dff2740b0 CR3=000000001c678000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fa529f30fa0 CR3=000000000c546000 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=a076351dab2ab7997449ecabef17f0a0 XMM02=2c67c8bc2e329bc3000000000011c4e0 XMM03=fb795ef6d65770560000000000123948 XMM04=3a0dd0ded831459c00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133448 XMM06=1a09139fbddf8c7e00000000001322b0 XMM07=e042d86d42eb936e0000000000123bc8 XMM08=2b214756a3b0bbc5000000000011c540 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000