syzkaller login: [ 31.224656] BUG: Bad rss-counter state mm:000000000aacc3e6 type:MM_FILEPAGES val:33 [ 31.226489] BUG: Bad rss-counter state mm:000000000aacc3e6 type:MM_ANONPAGES val:22 [ 31.392054] ================================================================== [ 31.392979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.393919] Read of size 8 at addr ffff88801a2e7798 by task sshd/221 [ 31.394674] [ 31.394887] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.395923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.396941] Call Trace: [ 31.397266] [ 31.397548] dump_stack_lvl+0x91/0xf0 [ 31.398076] print_report+0xcc/0x620 [ 31.398557] ? __virt_addr_valid+0x102/0x340 [ 31.399114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.399731] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.400358] kasan_report+0xbe/0xf0 [ 31.400849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.401468] vma_interval_tree_remove+0xc75/0xec0 [ 31.402069] vma_prepare+0xc54/0x11a0 [ 31.402543] __split_vma+0x5af/0x950 [ 31.403014] ? __pfx___split_vma+0x10/0x10 [ 31.403544] ? find_held_lock+0x2c/0x110 [ 31.404066] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.404638] ? lock_is_held_type+0x9f/0x120 [ 31.405179] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.405788] ? mtree_range_walk+0x632/0x900 [ 31.406339] ? mas_walk+0x5c7/0x7c0 [ 31.406818] do_vmi_munmap+0x1f1/0x2b0 [ 31.407314] mmap_region+0x1f9/0x2660 [ 31.407797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.408308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.409036] ? __pfx_lock_acquire+0x10/0x10 [ 31.409569] ? __pfx_mmap_region+0x10/0x10 [ 31.410104] ? security_mmap_addr+0x7d/0xa0 [ 31.410642] ? get_unmapped_area+0x1f5/0x3f0 [ 31.411193] do_mmap+0x854/0xf00 [ 31.411634] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.412126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.412692] ksys_mmap_pgoff+0x3af/0x500 [ 31.413211] do_syscall_64+0x3f/0x90 [ 31.413692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.414343] RIP: 0033:0x7fb8c1e84d82 [ 31.414802] 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 [ 31.416931] RSP: 002b:00007ffe9efdaea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.417827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8c1e84d82 [ 31.418669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8c12be000 [ 31.419513] RBP: 00007fb8c12be000 R08: 0000000000000009 R09: 0000000000001000 [ 31.420368] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0ea125ec0 [ 31.421216] R13: 00007ffe9efdaec0 R14: 00007ffe9efdaef0 R15: 00007ffe9efdb250 [ 31.422076] [ 31.422370] [ 31.422589] Allocated by task 214: [ 31.423015] kasan_save_stack+0x22/0x50 [ 31.423515] kasan_set_track+0x25/0x30 [ 31.424011] __kasan_slab_alloc+0x59/0x70 [ 31.424544] kmem_cache_alloc+0x16b/0x370 [ 31.425060] vm_area_dup+0x20/0x160 [ 31.425510] __split_vma+0x170/0x950 [ 31.425983] split_vma+0xc6/0x110 [ 31.426422] mprotect_fixup+0x8d2/0xb30 [ 31.426922] do_mprotect_pkey+0x87e/0xd40 [ 31.427437] __x64_sys_mprotect+0x78/0xc0 [ 31.427958] do_syscall_64+0x3f/0x90 [ 31.428425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429079] [ 31.429297] Freed by task 214: [ 31.429693] kasan_save_stack+0x22/0x50 [ 31.430197] kasan_set_track+0x25/0x30 [ 31.430690] kasan_save_free_info+0x2b/0x50 [ 31.431217] __kasan_slab_free+0x10a/0x190 [ 31.431745] kmem_cache_free+0x10d/0x4d0 [ 31.432254] rcu_core+0x8c8/0x2860 [ 31.432704] __do_softirq+0x1b7/0x7d4 [ 31.433176] [ 31.433389] Last potentially related work creation: [ 31.433965] kasan_save_stack+0x22/0x50 [ 31.434467] __kasan_record_aux_stack+0x8e/0xa0 [ 31.435044] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.435685] remove_vma+0x139/0x170 [ 31.436146] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.436721] do_vmi_munmap+0x1f1/0x2b0 [ 31.437293] __vm_munmap+0x138/0x3a0 [ 31.437761] __x64_sys_munmap+0x59/0x80 [ 31.438255] do_syscall_64+0x3f/0x90 [ 31.438728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439369] [ 31.439584] The buggy address belongs to the object at ffff88801a2e7740 [ 31.439584] which belongs to the cache vm_area_struct of size 168 [ 31.441045] The buggy address is located 88 bytes inside of [ 31.441045] freed 168-byte region [ffff88801a2e7740, ffff88801a2e77e8) [ 31.442449] [ 31.442666] The buggy address belongs to the physical page: [ 31.443325] page:000000003b2d5e3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2e7 [ 31.444404] memcg:ffff88800cb19701 [ 31.444837] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.445490] page_type: 0xffffffff() [ 31.445944] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.446856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb19701 [ 31.447756] page dumped because: kasan: bad access detected [ 31.448409] [ 31.448644] Memory state around the buggy address: [ 31.449216] ffff88801a2e7680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.450068] ffff88801a2e7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.450913] >ffff88801a2e7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.451762] ^ [ 31.452256] ffff88801a2e7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.453117] ffff88801a2e7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.453963] ================================================================== [ 31.454956] Disabling lock debugging due to kernel taint [ 33.367649] BUG: Bad rss-counter state mm:000000002db84d3f type:MM_FILEPAGES val:33 [ 33.368673] BUG: Bad rss-counter state mm:000000002db84d3f type:MM_ANONPAGES val:22 [ 33.857266] BUG: Bad rss-counter state mm:00000000c62ea9c2 type:MM_FILEPAGES val:33 [ 33.858243] BUG: Bad rss-counter state mm:00000000c62ea9c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5109' (ECDSA) to the list of known hosts. 2023/06/21 01:54:47 fuzzer started 2023/06/21 01:54:48 dialing manager at localhost:36067 2023/06/21 01:54:48 checking machine... 2023/06/21 01:54:48 checking revisions... [ 34.609289] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:54:48 testing simple program... [ 34.658749] cgroup: Unknown subsys name 'net' [ 34.700585] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:54:47 Registers: info registers vcpu 0 RAX=ffffffff818083e8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014647601 RSI=ffff8880146476b8 RDI=ffff8880146476b8 RBP=ffff888014647280 RSP=ffff8880146471b8 R8 =ffffffff861390ac R9 =ffff888014647268 R10=0000000000038001 R11=0000000000020de5 R12=ffff888014647288 R13=ffff888014647270 R14=ffff8880146476c0 R15=ffff888014647228 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f3c13d12900 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=00007ff5621df650 CR3=000000000d7a4000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=5042c4b5e3dcb8ab00000000000ae988 XMM05=326f0a4a73fda4540000000000132f08 XMM06=c291bd5c70af25b90000000000131cf8 XMM07=fb795ef6d65770560000000000121fa8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100359daae RBX=ffffed100359daaf RCX=ffffffff81bafbc8 RDX=ffffed100359daaf RSI=0000000000000008 RDI=ffff88801aced570 RBP=ffffed100359daae RSP=ffff88800f48f170 R8 =0000000000000000 R9 =ffffed100359daae R10=ffff88801aced577 R11=0000000000009293 R12=0000000000000000 R13=0000000000001000 R14=ffffea000070ac40 R15=0000000000000000 RIP=ffffffff8180f189 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 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=00007ffe0d9184c8 CR3=0000000005482000 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=00007fdd33c055100000555a89d1b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000