syzkaller login: [ 39.893161] BUG: Bad rss-counter state mm:00000000c16555e1 type:MM_FILEPAGES val:33 [ 39.894746] BUG: Bad rss-counter state mm:00000000c16555e1 type:MM_ANONPAGES val:22 [ 40.059304] ================================================================== [ 40.060209] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.061156] Read of size 8 at addr ffff88800e35f228 by task sshd/222 [ 40.061909] [ 40.062125] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.063075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.064044] Call Trace: [ 40.064359] [ 40.064662] dump_stack_lvl+0x91/0xf0 [ 40.065158] print_report+0xcc/0x620 [ 40.065649] ? __virt_addr_valid+0x102/0x340 [ 40.066203] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.066818] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.067434] kasan_report+0xbe/0xf0 [ 40.067913] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.068535] vma_interval_tree_remove+0xc75/0xec0 [ 40.069143] vma_prepare+0xc54/0x11a0 [ 40.069617] __split_vma+0x5af/0x950 [ 40.070087] ? __pfx___split_vma+0x10/0x10 [ 40.070609] ? find_held_lock+0x2c/0x110 [ 40.071129] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.071693] ? lock_is_held_type+0x9f/0x120 [ 40.072229] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.072833] ? mtree_range_walk+0x632/0x900 [ 40.073404] ? mas_walk+0x5c7/0x7c0 [ 40.073874] do_vmi_munmap+0x1f1/0x2b0 [ 40.074371] mmap_region+0x1f9/0x2660 [ 40.074867] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.075382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.076103] ? __pfx_lock_acquire+0x10/0x10 [ 40.076638] ? __pfx_mmap_region+0x10/0x10 [ 40.077206] ? security_mmap_addr+0x7d/0xa0 [ 40.077740] ? get_unmapped_area+0x1f5/0x3f0 [ 40.078285] do_mmap+0x854/0xf00 [ 40.078719] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.079214] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.079776] ksys_mmap_pgoff+0x3af/0x500 [ 40.080286] do_syscall_64+0x3f/0x90 [ 40.080768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.081430] RIP: 0033:0x7f137cfc7d82 [ 40.081890] 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 [ 40.084007] RSP: 002b:00007ffde6a0a3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.084911] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f137cfc7d82 [ 40.085757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f137c401000 [ 40.086593] RBP: 00007f137c401000 R08: 0000000000000009 R09: 0000000000001000 [ 40.087433] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f44103d90 [ 40.088267] R13: 00007ffde6a0a3c0 R14: 00007ffde6a0a3f0 R15: 00007ffde6a0a750 [ 40.089129] [ 40.089421] [ 40.089641] Allocated by task 215: [ 40.090068] kasan_save_stack+0x22/0x50 [ 40.090571] kasan_set_track+0x25/0x30 [ 40.091059] __kasan_slab_alloc+0x59/0x70 [ 40.091578] kmem_cache_alloc+0x16b/0x370 [ 40.092099] vm_area_dup+0x20/0x160 [ 40.092555] __split_vma+0x170/0x950 [ 40.093038] split_vma+0xc6/0x110 [ 40.093478] mprotect_fixup+0x8d2/0xb30 [ 40.093980] do_mprotect_pkey+0x87e/0xd40 [ 40.094499] __x64_sys_mprotect+0x78/0xc0 [ 40.095016] do_syscall_64+0x3f/0x90 [ 40.095487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.096123] [ 40.096342] Freed by task 215: [ 40.096735] kasan_save_stack+0x22/0x50 [ 40.097244] kasan_set_track+0x25/0x30 [ 40.097733] kasan_save_free_info+0x2b/0x50 [ 40.098258] __kasan_slab_free+0x10a/0x190 [ 40.098793] kmem_cache_free+0x10d/0x4d0 [ 40.099312] rcu_core+0x8c8/0x2860 [ 40.099765] __do_softirq+0x1b7/0x7d4 [ 40.100238] [ 40.100451] Last potentially related work creation: [ 40.101060] kasan_save_stack+0x22/0x50 [ 40.101566] __kasan_record_aux_stack+0x8e/0xa0 [ 40.102141] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.102781] remove_vma+0x139/0x170 [ 40.103236] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.103798] do_vmi_munmap+0x1f1/0x2b0 [ 40.104286] __vm_munmap+0x138/0x3a0 [ 40.104759] __x64_sys_munmap+0x59/0x80 [ 40.105260] do_syscall_64+0x3f/0x90 [ 40.105734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.106378] [ 40.106593] The buggy address belongs to the object at ffff88800e35f1d0 [ 40.106593] which belongs to the cache vm_area_struct of size 168 [ 40.108063] The buggy address is located 88 bytes inside of [ 40.108063] freed 168-byte region [ffff88800e35f1d0, ffff88800e35f278) [ 40.109474] [ 40.109690] The buggy address belongs to the physical page: [ 40.110347] page:00000000cf89abe3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe35f [ 40.111435] memcg:ffff888016af0801 [ 40.111867] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.112513] page_type: 0xffffffff() [ 40.112966] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.113884] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016af0801 [ 40.114796] page dumped because: kasan: bad access detected [ 40.115449] [ 40.115667] Memory state around the buggy address: [ 40.116256] ffff88800e35f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.117110] ffff88800e35f180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.117958] >ffff88800e35f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.118819] ^ [ 40.119370] ffff88800e35f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 40.120222] ffff88800e35f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 40.121082] ================================================================== [ 40.122058] Disabling lock debugging due to kernel taint [ 41.669372] BUG: Bad rss-counter state mm:000000002637a857 type:MM_FILEPAGES val:33 [ 41.670642] BUG: Bad rss-counter state mm:000000002637a857 type:MM_ANONPAGES val:22 [ 42.093919] BUG: Bad rss-counter state mm:00000000d848b969 type:MM_FILEPAGES val:33 [ 42.094979] BUG: Bad rss-counter state mm:00000000d848b969 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8309' (ECDSA) to the list of known hosts. 2023/06/19 17:38:28 fuzzer started 2023/06/19 17:38:28 dialing manager at localhost:44161 2023/06/19 17:38:28 checking machine... 2023/06/19 17:38:28 checking revisions... [ 42.819383] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:38:29 testing simple program... [ 42.868530] cgroup: Unknown subsys name 'net' [ 42.975398] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:38:19 Registers: info registers vcpu 0 RAX=00000000fbad2408 RBX=000055b4ffb39d00 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=000055b4ffb47c60 RBP=0000000000000000 RSP=00007fffdd723a38 R8 =0000000000000000 R9 =00007f54df50dbe0 R10=0000000000000100 R11=0000000000000202 R12=0000000000000000 R13=0000000000000000 R14=00007f54def36b22 R15=00007f54def5b710 RIP=00007f54df3d9720 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f54def5b900 00000000 00000000 GS =0000 0000000000000000 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=00007fffdd71e000 CR3=000000000c482000 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=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=0000000000000001 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=00007f1b22ac6ff0 CR3=000000000c62a000 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=d7bf02bb91fee391484cc8bf0c1e70e2 XMM02=000000000011fbb8ec2efd57dc4c00df XMM03=0000000000124280457809ac83d6668c XMM04=3eb6e60144cf164100000000000ae988 XMM05=59d5b690e0af863b0000000000133e78 XMM06=00c3ffa147b8d8570000000000133d00 XMM07=e042d86d42eb936e0000000000124500 XMM08=457809ac83d6668c000000000011fc18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000