syzkaller login: [ 30.448560] BUG: Bad rss-counter state mm:000000001a3ed4a2 type:MM_FILEPAGES val:33 [ 30.450315] BUG: Bad rss-counter state mm:000000001a3ed4a2 type:MM_ANONPAGES val:22 [ 30.632819] ================================================================== [ 30.633805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.634909] Read of size 8 at addr ffff88800bead4e0 by task sshd/221 [ 30.635739] [ 30.635972] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.636912] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.638014] Call Trace: [ 30.638359] [ 30.638668] dump_stack_lvl+0x91/0xf0 [ 30.639209] print_report+0xcc/0x620 [ 30.639746] ? __virt_addr_valid+0x102/0x340 [ 30.640354] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641011] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.641685] kasan_report+0xbe/0xf0 [ 30.642221] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.642897] vma_interval_tree_remove+0xc75/0xec0 [ 30.643546] vma_prepare+0xc54/0x11a0 [ 30.644074] __split_vma+0x5af/0x950 [ 30.644592] ? __pfx___split_vma+0x10/0x10 [ 30.645147] ? find_held_lock+0x2c/0x110 [ 30.645696] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.646314] ? lock_is_held_type+0x9f/0x120 [ 30.646901] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.647551] ? mtree_range_walk+0x632/0x900 [ 30.648142] ? mas_walk+0x5c7/0x7c0 [ 30.648648] do_vmi_munmap+0x1f1/0x2b0 [ 30.649172] mmap_region+0x1f9/0x2660 [ 30.649692] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.650247] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.651017] ? __pfx_lock_acquire+0x10/0x10 [ 30.651580] ? __pfx_mmap_region+0x10/0x10 [ 30.652147] ? security_mmap_addr+0x7d/0xa0 [ 30.652710] ? get_unmapped_area+0x1f5/0x3f0 [ 30.653316] do_mmap+0x854/0xf00 [ 30.653786] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.654336] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.654944] ksys_mmap_pgoff+0x3af/0x500 [ 30.655485] do_syscall_64+0x3f/0x90 [ 30.656003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.656698] RIP: 0033:0x7f15f928dd82 [ 30.657183] 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 [ 30.659458] RSP: 002b:00007fff6316e058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.660437] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15f928dd82 [ 30.661343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15f86c7000 [ 30.662295] RBP: 00007f15f86c7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.663200] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eda3d55d90 [ 30.664104] R13: 00007fff6316e070 R14: 00007fff6316e0a0 R15: 00007fff6316e400 [ 30.665022] [ 30.665336] [ 30.665562] Allocated by task 214: [ 30.666021] kasan_save_stack+0x22/0x50 [ 30.666564] kasan_set_track+0x25/0x30 [ 30.667093] __kasan_slab_alloc+0x59/0x70 [ 30.667656] kmem_cache_alloc+0x16b/0x370 [ 30.668209] vm_area_dup+0x20/0x160 [ 30.668698] __split_vma+0x170/0x950 [ 30.669192] split_vma+0xc6/0x110 [ 30.669660] mprotect_fixup+0x8d2/0xb30 [ 30.670205] do_mprotect_pkey+0x87e/0xd40 [ 30.670762] __x64_sys_mprotect+0x78/0xc0 [ 30.671319] do_syscall_64+0x3f/0x90 [ 30.671829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.672521] [ 30.672747] Freed by task 214: [ 30.673171] kasan_save_stack+0x22/0x50 [ 30.673711] kasan_set_track+0x25/0x30 [ 30.674258] kasan_save_free_info+0x2b/0x50 [ 30.674826] __kasan_slab_free+0x10a/0x190 [ 30.675393] kmem_cache_free+0x10d/0x4d0 [ 30.675930] rcu_core+0x8c8/0x2860 [ 30.676403] __do_softirq+0x1b7/0x7d4 [ 30.676917] [ 30.677143] Last potentially related work creation: [ 30.677762] kasan_save_stack+0x22/0x50 [ 30.678313] __kasan_record_aux_stack+0x8e/0xa0 [ 30.678930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.679615] remove_vma+0x139/0x170 [ 30.680100] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.680693] do_vmi_munmap+0x1f1/0x2b0 [ 30.681216] __vm_munmap+0x138/0x3a0 [ 30.681717] __x64_sys_munmap+0x59/0x80 [ 30.682271] do_syscall_64+0x3f/0x90 [ 30.682777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.683459] [ 30.683686] The buggy address belongs to the object at ffff88800bead488 [ 30.683686] which belongs to the cache vm_area_struct of size 168 [ 30.685246] The buggy address is located 88 bytes inside of [ 30.685246] freed 168-byte region [ffff88800bead488, ffff88800bead530) [ 30.686724] [ 30.686954] The buggy address belongs to the physical page: [ 30.687648] page:000000000923fdf3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbead [ 30.688812] memcg:ffff88800fb21a01 [ 30.689267] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.689979] page_type: 0xffffffff() [ 30.690473] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.691461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb21a01 [ 30.692421] page dumped because: kasan: bad access detected [ 30.693123] [ 30.693353] Memory state around the buggy address: [ 30.693982] ffff88800bead380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.694890] ffff88800bead400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.695826] >ffff88800bead480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.696728] ^ [ 30.697557] ffff88800bead500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.698498] ffff88800bead580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.699427] ================================================================== [ 30.700537] Disabling lock debugging due to kernel taint [ 32.781660] BUG: Bad rss-counter state mm:000000002ccabb4a type:MM_FILEPAGES val:33 [ 32.782847] BUG: Bad rss-counter state mm:000000002ccabb4a type:MM_ANONPAGES val:22 [ 33.222405] BUG: Bad rss-counter state mm:00000000dcfae50b type:MM_FILEPAGES val:33 [ 33.223770] BUG: Bad rss-counter state mm:00000000dcfae50b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34721' (ECDSA) to the list of known hosts. 2023/06/21 05:52:37 fuzzer started 2023/06/21 05:52:37 dialing manager at localhost:36067 2023/06/21 05:52:37 checking machine... 2023/06/21 05:52:37 checking revisions... [ 33.872862] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:52:38 testing simple program... [ 33.923231] cgroup: Unknown subsys name 'net' [ 33.973770] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:52:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fb4f468 RCX=0000000000000001 RDX=1ffff11001f69e98 RSI=ffff88800fb4f8e8 RDI=ffffffff8366a63c RBP=ffff88800fb4f4c0 RSP=ffff88800fb4f450 R8 =0000000000000001 R9 =ffff88800fb4f4a8 R10=0000000000038001 R11=0000000000020c57 R12=ffff88800fb4f530 R13=0000000000000000 R14=ffff888015e99b40 R15=0000000000092cc0 RIP=ffffffff811303b2 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 00007f41041d9900 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=00007f410478e650 CR3=000000000d838000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffc8bc53a88 CR3=000000001693e000 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=2037333a32353a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a32353a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000