syzkaller login: [ 38.681725] BUG: Bad rss-counter state mm:00000000433ed29c type:MM_FILEPAGES val:33 [ 38.682404] BUG: Bad rss-counter state mm:00000000433ed29c type:MM_ANONPAGES val:22 [ 38.726301] ================================================================== [ 38.728171] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.728779] Read of size 8 at addr ffff88800ef64ed8 by task sshd/219 [ 38.729394] [ 38.729536] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.730087] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.730717] Call Trace: [ 38.730926] [ 38.731112] dump_stack_lvl+0x91/0xf0 [ 38.731431] print_report+0xcc/0x620 [ 38.731751] ? __virt_addr_valid+0x102/0x340 [ 38.732111] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.732506] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.732906] kasan_report+0xbe/0xf0 [ 38.733361] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.735517] vma_interval_tree_remove+0xc75/0xec0 [ 38.735915] vma_prepare+0xc54/0x11a0 [ 38.736234] __split_vma+0x5af/0x950 [ 38.736541] ? __pfx___split_vma+0x10/0x10 [ 38.736886] ? find_held_lock+0x2c/0x110 [ 38.737242] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.737616] ? lock_is_held_type+0x9f/0x120 [ 38.737969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.738360] ? mtree_range_walk+0x632/0x900 [ 38.738728] ? mas_walk+0x5c7/0x7c0 [ 38.739038] do_vmi_munmap+0x1f1/0x2b0 [ 38.739360] mmap_region+0x1f9/0x2660 [ 38.739678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.740013] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.740477] ? __pfx_lock_acquire+0x10/0x10 [ 38.740825] ? __pfx_mmap_region+0x10/0x10 [ 38.741169] ? security_mmap_addr+0x7d/0xa0 [ 38.741560] ? get_unmapped_area+0x1f5/0x3f0 [ 38.741915] do_mmap+0x854/0xf00 [ 38.742202] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.742526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.742889] ksys_mmap_pgoff+0x3af/0x500 [ 38.743221] do_syscall_64+0x3f/0x90 [ 38.743534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.743955] RIP: 0033:0x7f1290306d82 [ 38.744258] 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 [ 38.745664] RSP: 002b:00007ffe6be0b928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.746251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1290306d82 [ 38.746790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f128f740000 [ 38.747332] RBP: 00007f128f740000 R08: 0000000000000009 R09: 0000000000001000 [ 38.747884] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573a73d0ec0 [ 38.748430] R13: 00007ffe6be0b940 R14: 00007ffe6be0b970 R15: 00007ffe6be0bcd0 [ 38.748985] [ 38.749176] [ 38.749341] Allocated by task 211: [ 38.749619] kasan_save_stack+0x22/0x50 [ 38.749953] kasan_set_track+0x25/0x30 [ 38.750274] __kasan_slab_alloc+0x59/0x70 [ 38.750615] kmem_cache_alloc+0x16b/0x370 [ 38.750954] vm_area_dup+0x20/0x160 [ 38.751249] __split_vma+0x170/0x950 [ 38.751552] split_vma+0xc6/0x110 [ 38.751842] mprotect_fixup+0x8d2/0xb30 [ 38.752165] do_mprotect_pkey+0x87e/0xd40 [ 38.752504] __x64_sys_mprotect+0x78/0xc0 [ 38.752844] do_syscall_64+0x3f/0x90 [ 38.753152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.753595] [ 38.753736] Freed by task 211: [ 38.753989] kasan_save_stack+0x22/0x50 [ 38.754313] kasan_set_track+0x25/0x30 [ 38.754663] kasan_save_free_info+0x2b/0x50 [ 38.755055] __kasan_slab_free+0x10a/0x190 [ 38.755442] kmem_cache_free+0x10d/0x4d0 [ 38.755827] rcu_core+0x8c8/0x2860 [ 38.756164] __do_softirq+0x1b7/0x7d4 [ 38.756513] [ 38.756670] Last potentially related work creation: [ 38.757111] kasan_save_stack+0x22/0x50 [ 38.757687] __kasan_record_aux_stack+0x8e/0xa0 [ 38.758703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.760969] remove_vma+0x139/0x170 [ 38.761290] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.762427] do_vmi_munmap+0x1f1/0x2b0 [ 38.762738] __vm_munmap+0x138/0x3a0 [ 38.763037] __x64_sys_munmap+0x59/0x80 [ 38.763353] do_syscall_64+0x3f/0x90 [ 38.763660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.764073] [ 38.764212] The buggy address belongs to the object at ffff88800ef64e80 [ 38.764212] which belongs to the cache vm_area_struct of size 168 [ 38.765135] The buggy address is located 88 bytes inside of [ 38.765135] freed 168-byte region [ffff88800ef64e80, ffff88800ef64f28) [ 38.766458] [ 38.766597] The buggy address belongs to the physical page: [ 38.767013] page:00000000bf1db282 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef64 [ 38.767697] memcg:ffff88800f026001 [ 38.767969] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.768379] page_type: 0xffffffff() [ 38.768668] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c3c40 dead000000000002 [ 38.769532] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f026001 [ 38.770101] page dumped because: kasan: bad access detected [ 38.770670] [ 38.770809] Memory state around the buggy address: [ 38.771176] ffff88800ef64d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.771771] ffff88800ef64e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.772355] >ffff88800ef64e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.772900] ^ [ 38.774057] ffff88800ef64f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.774689] ffff88800ef64f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.775228] ================================================================== [ 38.776300] Disabling lock debugging due to kernel taint [ 40.631621] BUG: Bad rss-counter state mm:00000000620123a9 type:MM_FILEPAGES val:33 [ 40.632220] BUG: Bad rss-counter state mm:00000000620123a9 type:MM_ANONPAGES val:22 [ 41.581573] BUG: Bad rss-counter state mm:00000000c22aa13d type:MM_FILEPAGES val:33 [ 41.582209] BUG: Bad rss-counter state mm:00000000c22aa13d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24932' (ECDSA) to the list of known hosts. 2023/06/21 10:04:10 fuzzer started 2023/06/21 10:04:10 dialing manager at localhost:36067 2023/06/21 10:04:10 checking machine... 2023/06/21 10:04:10 checking revisions... [ 42.388497] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:04:10 testing simple program... [ 42.430612] cgroup: Unknown subsys name 'net' [ 42.469827] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:04:10 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff88800f378000 RCX=0000000000000000 RDX=1ffff11001e6f208 RSI=ffffffff83018a8f RDI=000000000000000a RBP=0000000000000080 RSP=ffff88806ce09eb0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=ffff88806ce09ff8 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff88800f379040 R15=000000000000000a RIP=ffffffff83018ab7 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 00007f97c1c3e900 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=00007f70893cfbd0 CR3=0000000014736000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad720 RCX=ffff88806cf09b38 RDX=1ffff1100d9e135e RSI=ffff88806cf09b30 RDI=ffffffff813ad720 RBP=ffff88806cf09af0 RSP=ffff88806cf09a70 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801c96ec60 RIP=ffffffff811fc87d RFL=00000296 [--S-AP-] 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=00007fa74017d328 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000