syzkaller login: [ 51.536688] BUG: Bad rss-counter state mm:0000000009d8c023 type:MM_FILEPAGES val:33 [ 51.538231] BUG: Bad rss-counter state mm:0000000009d8c023 type:MM_ANONPAGES val:22 [ 51.681241] ================================================================== [ 51.682325] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.683609] Read of size 8 at addr ffff88801a3465c8 by task sshd/221 [ 51.684512] [ 51.684769] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.685763] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.686734] Call Trace: [ 51.687050] [ 51.687346] dump_stack_lvl+0x91/0xf0 [ 51.687830] print_report+0xcc/0x620 [ 51.688302] ? __virt_addr_valid+0x102/0x340 [ 51.688855] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.689463] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.690086] kasan_report+0xbe/0xf0 [ 51.690564] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.691196] vma_interval_tree_remove+0xc75/0xec0 [ 51.691800] vma_prepare+0xc54/0x11a0 [ 51.692274] __split_vma+0x5af/0x950 [ 51.692743] ? __pfx___split_vma+0x10/0x10 [ 51.693270] ? find_held_lock+0x2c/0x110 [ 51.693793] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.694358] ? lock_is_held_type+0x9f/0x120 [ 51.694891] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.695509] ? mtree_range_walk+0x632/0x900 [ 51.696058] ? mas_walk+0x5c7/0x7c0 [ 51.696526] do_vmi_munmap+0x1f1/0x2b0 [ 51.697012] mmap_region+0x1f9/0x2660 [ 51.697488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.697998] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.698710] ? __pfx_lock_acquire+0x10/0x10 [ 51.699242] ? __pfx_mmap_region+0x10/0x10 [ 51.699777] ? security_mmap_addr+0x7d/0xa0 [ 51.700307] ? get_unmapped_area+0x1f5/0x3f0 [ 51.700854] do_mmap+0x854/0xf00 [ 51.701288] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.701782] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.702336] ksys_mmap_pgoff+0x3af/0x500 [ 51.702839] do_syscall_64+0x3f/0x90 [ 51.703335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.703982] RIP: 0033:0x7f60fdba4d82 [ 51.704432] 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 [ 51.706532] RSP: 002b:00007ffdda34c1b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.707432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60fdba4d82 [ 51.708266] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60fcfde000 [ 51.709102] RBP: 00007f60fcfde000 R08: 0000000000000009 R09: 0000000000001000 [ 51.709936] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560d6b69f70 [ 51.710768] R13: 00007ffdda34c1d0 R14: 00007ffdda34c200 R15: 00007ffdda34c560 [ 51.711623] [ 51.711913] [ 51.712129] Allocated by task 214: [ 51.712555] kasan_save_stack+0x22/0x50 [ 51.713052] kasan_set_track+0x25/0x30 [ 51.713540] __kasan_slab_alloc+0x59/0x70 [ 51.714056] kmem_cache_alloc+0x16b/0x370 [ 51.714563] vm_area_dup+0x20/0x160 [ 51.715011] __split_vma+0x170/0x950 [ 51.715491] split_vma+0xc6/0x110 [ 51.715926] mprotect_fixup+0x8d2/0xb30 [ 51.716421] do_mprotect_pkey+0x87e/0xd40 [ 51.716936] __x64_sys_mprotect+0x78/0xc0 [ 51.717459] do_syscall_64+0x3f/0x90 [ 51.717931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.718564] [ 51.718782] Freed by task 214: [ 51.719174] kasan_save_stack+0x22/0x50 [ 51.719671] kasan_set_track+0x25/0x30 [ 51.720157] kasan_save_free_info+0x2b/0x50 [ 51.720688] __kasan_slab_free+0x10a/0x190 [ 51.721216] kmem_cache_free+0x10d/0x4d0 [ 51.721724] rcu_core+0x8c8/0x2860 [ 51.722164] __do_softirq+0x1b7/0x7d4 [ 51.722633] [ 51.722847] Last potentially related work creation: [ 51.723440] kasan_save_stack+0x22/0x50 [ 51.723939] __kasan_record_aux_stack+0x8e/0xa0 [ 51.724611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.725262] remove_vma+0x139/0x170 [ 51.725709] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.726269] do_vmi_munmap+0x1f1/0x2b0 [ 51.726748] __vm_munmap+0x138/0x3a0 [ 51.727218] __x64_sys_munmap+0x59/0x80 [ 51.727720] do_syscall_64+0x3f/0x90 [ 51.728186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.728822] [ 51.729049] The buggy address belongs to the object at ffff88801a346570 [ 51.729049] which belongs to the cache vm_area_struct of size 168 [ 51.730528] The buggy address is located 88 bytes inside of [ 51.730528] freed 168-byte region [ffff88801a346570, ffff88801a346618) [ 51.731923] [ 51.732141] The buggy address belongs to the physical page: [ 51.732795] page:0000000043963d15 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a346 [ 51.733876] memcg:ffff888015ccbe01 [ 51.734297] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.734941] page_type: 0xffffffff() [ 51.735413] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.736320] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ccbe01 [ 51.737223] page dumped because: kasan: bad access detected [ 51.737898] [ 51.738117] Memory state around the buggy address: [ 51.738722] ffff88801a346480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.739593] ffff88801a346500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 51.740454] >ffff88801a346580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.741319] ^ [ 51.741981] ffff88801a346600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 51.742844] ffff88801a346680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.743752] ================================================================== [ 51.744705] Disabling lock debugging due to kernel taint [ 54.023568] BUG: Bad rss-counter state mm:0000000021248851 type:MM_FILEPAGES val:33 [ 54.024752] BUG: Bad rss-counter state mm:0000000021248851 type:MM_ANONPAGES val:22 [ 54.578645] BUG: Bad rss-counter state mm:0000000000b9adee type:MM_FILEPAGES val:33 [ 54.579885] BUG: Bad rss-counter state mm:0000000000b9adee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44788' (ECDSA) to the list of known hosts. 2023/06/20 06:48:21 fuzzer started 2023/06/20 06:48:22 dialing manager at localhost:44161 2023/06/20 06:48:22 checking machine... 2023/06/20 06:48:22 checking revisions... [ 55.237416] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:48:22 testing simple program... [ 55.288097] cgroup: Unknown subsys name 'net' [ 55.326490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:48:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e83ea00 RCX=ffffffff81f1b13a RDX=1ffff11001d07d4a RSI=0000000000000001 RDI=0000000000000000 RBP=0000000000000002 RSP=ffff8880145ef990 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000001 R12=0000000000000000 R13=1ffff110028bdf34 R14=ffff88800e83eb90 R15=ffff88800e83eb90 RIP=ffffffff814c0388 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 00007f1f1ba9c900 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=00007f1f1c0540b0 CR3=000000000ca52000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 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=00007f518f12fe60 CR3=000000000c4fe000 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=aa9d076c95dd889678486bfd29327236 XMM02=2c67c8bc2e329bc3000000000011d310 XMM03=fb795ef6d657705600000000001240f0 XMM04=4cb797492fdad3dc00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133c88 XMM06=cdc80ceaba729bff0000000000132af0 XMM07=e042d86d42eb936e0000000000124370 XMM08=db0fe922d3ce243e000000000011d370 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000