syzkaller login: [ 30.634117] BUG: Bad rss-counter state mm:000000000268f71f type:MM_FILEPAGES val:33 [ 30.635321] BUG: Bad rss-counter state mm:000000000268f71f type:MM_ANONPAGES val:22 [ 30.673323] ================================================================== [ 30.673998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.674714] Read of size 8 at addr ffff88801a7a0a50 by task sshd/220 [ 30.675275] [ 30.675436] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.676068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.676803] Call Trace: [ 30.677182] [ 30.677396] dump_stack_lvl+0x91/0xf0 [ 30.677829] print_report+0xcc/0x620 [ 30.678230] ? __virt_addr_valid+0x102/0x340 [ 30.678738] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.679294] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.679776] kasan_report+0xbe/0xf0 [ 30.680182] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.680770] vma_interval_tree_remove+0xc75/0xec0 [ 30.681302] vma_prepare+0xc54/0x11a0 [ 30.681654] __split_vma+0x5af/0x950 [ 30.682113] ? __pfx___split_vma+0x10/0x10 [ 30.682531] ? find_held_lock+0x2c/0x110 [ 30.682938] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.683440] ? lock_is_held_type+0x9f/0x120 [ 30.683871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.684381] ? mtree_range_walk+0x632/0x900 [ 30.684869] ? mas_walk+0x5c7/0x7c0 [ 30.685316] do_vmi_munmap+0x1f1/0x2b0 [ 30.685688] mmap_region+0x1f9/0x2660 [ 30.686124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.686566] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.687092] ? __pfx_lock_acquire+0x10/0x10 [ 30.687562] ? __pfx_mmap_region+0x10/0x10 [ 30.688078] ? security_mmap_addr+0x7d/0xa0 [ 30.688482] ? get_unmapped_area+0x1f5/0x3f0 [ 30.688885] do_mmap+0x854/0xf00 [ 30.689209] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.689575] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.689992] ksys_mmap_pgoff+0x3af/0x500 [ 30.690366] do_syscall_64+0x3f/0x90 [ 30.690759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.691349] RIP: 0033:0x7f1596ee5d82 [ 30.691688] 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 [ 30.693538] RSP: 002b:00007ffdfdbe6708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.694343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1596ee5d82 [ 30.694964] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f159631f000 [ 30.695703] RBP: 00007f159631f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.696337] R10: 0000000000000812 R11: 0000000000000206 R12: 000055751ec0cec0 [ 30.697063] R13: 00007ffdfdbe6720 R14: 00007ffdfdbe6750 R15: 00007ffdfdbe6ab0 [ 30.697845] [ 30.698122] [ 30.698284] Allocated by task 213: [ 30.698599] kasan_save_stack+0x22/0x50 [ 30.698974] kasan_set_track+0x25/0x30 [ 30.699343] __kasan_slab_alloc+0x59/0x70 [ 30.699730] kmem_cache_alloc+0x16b/0x370 [ 30.700111] vm_area_dup+0x20/0x160 [ 30.700460] __split_vma+0x170/0x950 [ 30.700807] split_vma+0xc6/0x110 [ 30.701130] mprotect_fixup+0x8d2/0xb30 [ 30.701501] do_mprotect_pkey+0x87e/0xd40 [ 30.701889] __x64_sys_mprotect+0x78/0xc0 [ 30.702282] do_syscall_64+0x3f/0x90 [ 30.702637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703119] [ 30.703281] Freed by task 213: [ 30.703574] kasan_save_stack+0x22/0x50 [ 30.703948] kasan_set_track+0x25/0x30 [ 30.704326] kasan_save_free_info+0x2b/0x50 [ 30.704718] __kasan_slab_free+0x10a/0x190 [ 30.705114] kmem_cache_free+0x10d/0x4d0 [ 30.705491] rcu_core+0x8c8/0x2860 [ 30.705821] __do_softirq+0x1b7/0x7d4 [ 30.706177] [ 30.706339] Last potentially related work creation: [ 30.706770] kasan_save_stack+0x22/0x50 [ 30.707144] __kasan_record_aux_stack+0x8e/0xa0 [ 30.707563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.708042] remove_vma+0x139/0x170 [ 30.708381] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.708794] do_vmi_munmap+0x1f1/0x2b0 [ 30.709156] __vm_munmap+0x138/0x3a0 [ 30.709502] __x64_sys_munmap+0x59/0x80 [ 30.709868] do_syscall_64+0x3f/0x90 [ 30.710221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.710696] [ 30.710856] The buggy address belongs to the object at ffff88801a7a09f8 [ 30.710856] which belongs to the cache vm_area_struct of size 168 [ 30.711940] The buggy address is located 88 bytes inside of [ 30.711940] freed 168-byte region [ffff88801a7a09f8, ffff88801a7a0aa0) [ 30.712984] [ 30.713144] The buggy address belongs to the physical page: [ 30.713630] page:00000000f30134ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a7a0 [ 30.714431] memcg:ffff8880096dd801 [ 30.714745] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.715226] page_type: 0xffffffff() [ 30.715560] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.716235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096dd801 [ 30.716908] page dumped because: kasan: bad access detected [ 30.717398] [ 30.717557] Memory state around the buggy address: [ 30.717986] ffff88801a7a0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.718710] ffff88801a7a0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.719342] >ffff88801a7a0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.719971] ^ [ 30.720513] ffff88801a7a0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.721147] ffff88801a7a0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.721773] ================================================================== [ 30.722451] Disabling lock debugging due to kernel taint [ 32.803010] BUG: Bad rss-counter state mm:00000000db5d6f63 type:MM_FILEPAGES val:33 [ 32.804132] BUG: Bad rss-counter state mm:00000000db5d6f63 type:MM_ANONPAGES val:22 [ 33.254789] BUG: Bad rss-counter state mm:0000000052b5bb9b type:MM_FILEPAGES val:33 [ 33.256512] BUG: Bad rss-counter state mm:0000000052b5bb9b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31016' (ECDSA) to the list of known hosts. 2023/06/20 18:47:23 fuzzer started 2023/06/20 18:47:24 dialing manager at localhost:36067 2023/06/20 18:47:24 checking machine... 2023/06/20 18:47:24 checking revisions... [ 34.002459] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:47:24 testing simple program... [ 34.046007] cgroup: Unknown subsys name 'net' [ 34.106981] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:47:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014717570 RCX=ffff888014717548 RDX=1ffff110028e2eaf RSI=ffffffff813ad720 RDI=ffff888014717578 RBP=0000000000000000 RSP=ffff888014717488 R8 =0000000000000001 R9 =ffff8880147174e8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888014717570 R13=0000000000000000 R14=ffff888014718000 R15=0000000000000000 RIP=ffffffff813ad4be RFL=00000216 [----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb0413c3900 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=00007fb04083bcb0 CR3=000000000c6c6000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ac1fdec6bd16982200000000000ae988 XMM05=43dba6620c7a624f0000000000133a90 XMM06=4fda316b135da52b0000000000132b30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000dc0 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800f0f7d08 RSP=ffff88800f0f7ca0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8780 R13=ffffffff81787d2a R14=0000000000000000 R15=ffffffff8186c9a6 RIP=ffffffff812d8a5e RFL=00000286 [--S--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 00007f581c173900 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=00007f581c728650 CR3=000000000dfda000 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=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