syzkaller login: [ 30.150692] BUG: Bad rss-counter state mm:00000000daf8f251 type:MM_FILEPAGES val:33 [ 30.151917] BUG: Bad rss-counter state mm:00000000daf8f251 type:MM_ANONPAGES val:22 [ 30.181004] ================================================================== [ 30.181699] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.182266] Read of size 8 at addr ffff8880169103f8 by task sshd/220 [ 30.182729] [ 30.182857] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.183382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.184001] Call Trace: [ 30.184196] [ 30.184367] dump_stack_lvl+0x91/0xf0 [ 30.184658] print_report+0xcc/0x620 [ 30.184944] ? __virt_addr_valid+0x102/0x340 [ 30.185269] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.185630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.185994] kasan_report+0xbe/0xf0 [ 30.186366] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.186712] vma_interval_tree_remove+0xc75/0xec0 [ 30.187045] vma_prepare+0xc54/0x11a0 [ 30.187307] __split_vma+0x5af/0x950 [ 30.187567] ? __pfx___split_vma+0x10/0x10 [ 30.187862] ? find_held_lock+0x2c/0x110 [ 30.188151] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.188476] ? lock_is_held_type+0x9f/0x120 [ 30.188770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.189103] ? mtree_range_walk+0x632/0x900 [ 30.189410] ? mas_walk+0x5c7/0x7c0 [ 30.189690] do_vmi_munmap+0x1f1/0x2b0 [ 30.189980] mmap_region+0x1f9/0x2660 [ 30.190272] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.190582] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.191017] ? __pfx_lock_acquire+0x10/0x10 [ 30.191341] ? __pfx_mmap_region+0x10/0x10 [ 30.191667] ? security_mmap_addr+0x7d/0xa0 [ 30.191988] ? get_unmapped_area+0x1f5/0x3f0 [ 30.192330] do_mmap+0x854/0xf00 [ 30.192594] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.192881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.193222] ksys_mmap_pgoff+0x3af/0x500 [ 30.193533] do_syscall_64+0x3f/0x90 [ 30.193818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.194206] RIP: 0033:0x7f0bb79a0d82 [ 30.194478] 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 [ 30.195781] RSP: 002b:00007ffeed44d458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.196343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0bb79a0d82 [ 30.196857] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bb6dda000 [ 30.197377] RBP: 00007f0bb6dda000 R08: 0000000000000009 R09: 0000000000001000 [ 30.197899] R10: 0000000000000812 R11: 0000000000000206 R12: 000055909f7fdf70 [ 30.198416] R13: 00007ffeed44d470 R14: 00007ffeed44d4a0 R15: 00007ffeed44d800 [ 30.198931] [ 30.199110] [ 30.199239] Allocated by task 213: [ 30.199506] kasan_save_stack+0x22/0x50 [ 30.199808] kasan_set_track+0x25/0x30 [ 30.200100] __kasan_slab_alloc+0x59/0x70 [ 30.200416] kmem_cache_alloc+0x16b/0x370 [ 30.200722] vm_area_dup+0x20/0x160 [ 30.200989] __split_vma+0x170/0x950 [ 30.201265] split_vma+0xc6/0x110 [ 30.201532] mprotect_fixup+0x8d2/0xb30 [ 30.201831] do_mprotect_pkey+0x87e/0xd40 [ 30.202151] __x64_sys_mprotect+0x78/0xc0 [ 30.202462] do_syscall_64+0x3f/0x90 [ 30.202747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.203132] [ 30.203259] Freed by task 213: [ 30.203500] kasan_save_stack+0x22/0x50 [ 30.203801] kasan_set_track+0x25/0x30 [ 30.204097] kasan_save_free_info+0x2b/0x50 [ 30.204422] __kasan_slab_free+0x10a/0x190 [ 30.204743] kmem_cache_free+0x10d/0x4d0 [ 30.205041] rcu_core+0x8c8/0x2860 [ 30.205305] __do_softirq+0x1b7/0x7d4 [ 30.205599] [ 30.205724] Last potentially related work creation: [ 30.206069] kasan_save_stack+0x22/0x50 [ 30.206373] __kasan_record_aux_stack+0x8e/0xa0 [ 30.206719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.207102] remove_vma+0x139/0x170 [ 30.207374] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.207702] do_vmi_munmap+0x1f1/0x2b0 [ 30.207992] __vm_munmap+0x138/0x3a0 [ 30.208271] __x64_sys_munmap+0x59/0x80 [ 30.208564] do_syscall_64+0x3f/0x90 [ 30.208846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.209233] [ 30.209360] The buggy address belongs to the object at ffff8880169103a0 [ 30.209360] which belongs to the cache vm_area_struct of size 168 [ 30.210249] The buggy address is located 88 bytes inside of [ 30.210249] freed 168-byte region [ffff8880169103a0, ffff888016910448) [ 30.211107] [ 30.211236] The buggy address belongs to the physical page: [ 30.211654] page:000000009c374cfe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16910 [ 30.212315] memcg:ffff88800ed69501 [ 30.212565] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.212955] page_type: 0xffffffff() [ 30.213216] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.213780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed69501 [ 30.214319] page dumped because: kasan: bad access detected [ 30.214721] [ 30.214846] Memory state around the buggy address: [ 30.215203] ffff888016910280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.215720] ffff888016910300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.216251] >ffff888016910380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.216767] ^ [ 30.217271] ffff888016910400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.217792] ffff888016910480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.218304] ================================================================== [ 30.219153] Disabling lock debugging due to kernel taint [ 32.112861] BUG: Bad rss-counter state mm:0000000018444698 type:MM_FILEPAGES val:33 [ 32.114435] BUG: Bad rss-counter state mm:0000000018444698 type:MM_ANONPAGES val:22 [ 32.653967] BUG: Bad rss-counter state mm:000000002cc6ac9c type:MM_FILEPAGES val:33 [ 32.655111] BUG: Bad rss-counter state mm:000000002cc6ac9c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23210' (ECDSA) to the list of known hosts. 2023/06/20 22:32:26 fuzzer started 2023/06/20 22:32:26 dialing manager at localhost:36067 2023/06/20 22:32:26 checking machine... 2023/06/20 22:32:26 checking revisions... [ 33.261797] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:32:26 testing simple program... [ 33.303028] cgroup: Unknown subsys name 'net' [ 33.353197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:32:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000003ad7 RSI=0000000000003ad7 RDI=ffffffff864f854c RBP=ffff8880102b79d0 RSP=ffff8880102b7908 R8 =0000000000000000 R9 =ffff8880102b79b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff8880102b79d8 R13=ffff8880102b79c0 R14=ffff8880102b79b9 R15=ffff8880102b7978 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f30a798b900 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=00007f30a7f42618 CR3=000000000f064000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100131351d RBX=ffff88800989a8b8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800989a8e8 RBP=ffff88801623f740 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888016257318 R14=ffffffff813782f8 R15=ffff888013e39580 RIP=ffffffff818464e2 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 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=00007fbb0ba86fe0 CR3=000000000c584000 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=26aeb541fc8f96918f4177b57bd0ae99 XMM02=ec2efd57dc4c00df000000000011a980 XMM03=457fe6786aca944d000000000011aa50 XMM04=266ea46cbaab4b9a00000000000ae988 XMM05=b394f113b7ab36df00000000001323e0 XMM06=4fda316b135da52b0000000000131dd8 XMM07=e042d86d42eb936e00000000001221b0 XMM08=457fe6786aca944d000000000011aa50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000