syzkaller login: [ 30.193482] BUG: Bad rss-counter state mm:00000000c65de3f3 type:MM_FILEPAGES val:33 [ 30.194647] BUG: Bad rss-counter state mm:00000000c65de3f3 type:MM_ANONPAGES val:22 [ 30.341374] ================================================================== [ 30.342449] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.343548] Read of size 8 at addr ffff88800c44d798 by task sshd/220 [ 30.344619] [ 30.344852] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.345723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.346710] Call Trace: [ 30.347026] [ 30.347309] dump_stack_lvl+0x91/0xf0 [ 30.347796] print_report+0xcc/0x620 [ 30.348275] ? __virt_addr_valid+0x102/0x340 [ 30.348824] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.349440] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.350063] kasan_report+0xbe/0xf0 [ 30.350535] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.351151] vma_interval_tree_remove+0xc75/0xec0 [ 30.351754] vma_prepare+0xc54/0x11a0 [ 30.352223] __split_vma+0x5af/0x950 [ 30.352695] ? __pfx___split_vma+0x10/0x10 [ 30.353215] ? find_held_lock+0x2c/0x110 [ 30.353759] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.354316] ? lock_is_held_type+0x9f/0x120 [ 30.354862] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.355462] ? mtree_range_walk+0x632/0x900 [ 30.356004] ? mas_walk+0x5c7/0x7c0 [ 30.356476] do_vmi_munmap+0x1f1/0x2b0 [ 30.356962] mmap_region+0x1f9/0x2660 [ 30.357436] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.357948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.358658] ? __pfx_lock_acquire+0x10/0x10 [ 30.359190] ? __pfx_mmap_region+0x10/0x10 [ 30.359713] ? security_mmap_addr+0x7d/0xa0 [ 30.360238] ? get_unmapped_area+0x1f5/0x3f0 [ 30.360787] do_mmap+0x854/0xf00 [ 30.361222] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.361721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.362276] ksys_mmap_pgoff+0x3af/0x500 [ 30.362778] do_syscall_64+0x3f/0x90 [ 30.363254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.363890] RIP: 0033:0x7f6414f2ad82 [ 30.364344] 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 [ 30.366462] RSP: 002b:00007ffc4b83b5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.367356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6414f2ad82 [ 30.368211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6414364000 [ 30.369056] RBP: 00007f6414364000 R08: 0000000000000009 R09: 0000000000001000 [ 30.369899] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560237048ec0 [ 30.370736] R13: 00007ffc4b83b610 R14: 00007ffc4b83b640 R15: 00007ffc4b83b9a0 [ 30.371593] [ 30.371888] [ 30.372102] Allocated by task 213: [ 30.372527] kasan_save_stack+0x22/0x50 [ 30.373028] kasan_set_track+0x25/0x30 [ 30.373516] __kasan_slab_alloc+0x59/0x70 [ 30.374035] kmem_cache_alloc+0x16b/0x370 [ 30.374556] vm_area_dup+0x20/0x160 [ 30.375004] __split_vma+0x170/0x950 [ 30.375470] split_vma+0xc6/0x110 [ 30.375905] mprotect_fixup+0x8d2/0xb30 [ 30.376406] do_mprotect_pkey+0x87e/0xd40 [ 30.376921] __x64_sys_mprotect+0x78/0xc0 [ 30.377441] do_syscall_64+0x3f/0x90 [ 30.377925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.378567] [ 30.378780] Freed by task 213: [ 30.379180] kasan_save_stack+0x22/0x50 [ 30.379679] kasan_set_track+0x25/0x30 [ 30.380166] kasan_save_free_info+0x2b/0x50 [ 30.380691] __kasan_slab_free+0x10a/0x190 [ 30.381226] kmem_cache_free+0x10d/0x4d0 [ 30.381735] rcu_core+0x8c8/0x2860 [ 30.382185] __do_softirq+0x1b7/0x7d4 [ 30.382667] [ 30.382887] Last potentially related work creation: [ 30.383481] kasan_save_stack+0x22/0x50 [ 30.383994] __kasan_record_aux_stack+0x8e/0xa0 [ 30.384578] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.385237] remove_vma+0x139/0x170 [ 30.385792] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.386363] do_vmi_munmap+0x1f1/0x2b0 [ 30.386866] __vm_munmap+0x138/0x3a0 [ 30.387349] __x64_sys_munmap+0x59/0x80 [ 30.387858] do_syscall_64+0x3f/0x90 [ 30.388348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.389005] [ 30.389227] The buggy address belongs to the object at ffff88800c44d740 [ 30.389227] which belongs to the cache vm_area_struct of size 168 [ 30.390763] The buggy address is located 88 bytes inside of [ 30.390763] freed 168-byte region [ffff88800c44d740, ffff88800c44d7e8) [ 30.392215] [ 30.392434] The buggy address belongs to the physical page: [ 30.393113] page:000000005489a2ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc44d [ 30.394251] memcg:ffff888013f54801 [ 30.394682] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.395348] page_type: 0xffffffff() [ 30.395824] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.396780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f54801 [ 30.397732] page dumped because: kasan: bad access detected [ 30.398426] [ 30.398645] Memory state around the buggy address: [ 30.399248] ffff88800c44d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.400128] ffff88800c44d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.400999] >ffff88800c44d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.401894] ^ [ 30.402416] ffff88800c44d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.403333] ffff88800c44d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.404235] ================================================================== [ 30.405194] Disabling lock debugging due to kernel taint [ 32.465897] BUG: Bad rss-counter state mm:00000000d7e525fe type:MM_FILEPAGES val:33 [ 32.467046] BUG: Bad rss-counter state mm:00000000d7e525fe type:MM_ANONPAGES val:22 [ 32.886077] BUG: Bad rss-counter state mm:00000000596de2bb type:MM_FILEPAGES val:33 [ 32.887119] BUG: Bad rss-counter state mm:00000000596de2bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50021' (ECDSA) to the list of known hosts. 2023/06/20 15:31:37 fuzzer started 2023/06/20 15:31:37 dialing manager at localhost:36067 2023/06/20 15:31:37 checking machine... 2023/06/20 15:31:37 checking revisions... [ 33.644648] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:31:37 testing simple program... [ 33.697424] cgroup: Unknown subsys name 'net' [ 33.758630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:31:37 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f6126f610b0 CR3=0000000019e00000 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=31333a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880169c3000 RCX=0000000000000002 RDX=ffffffff87f956a0 RSI=ffffffff84d30800 RDI=ffff8880169c32a0 RBP=ffff8880169c3288 RSP=ffff8880147e7d10 R8 =0000000000000002 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000009 R14=ffffffff87f97640 R15=0000000000000001 RIP=ffffffff812dfbc4 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 00007f61269a9900 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=00007f0baec4b1d0 CR3=000000000f742000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000