syzkaller login: [ 30.886828] sshd (213) used greatest stack depth: 24120 bytes left [ 30.888318] BUG: Bad rss-counter state mm:0000000086f90dab type:MM_FILEPAGES val:33 [ 30.889551] BUG: Bad rss-counter state mm:0000000086f90dab type:MM_ANONPAGES val:22 [ 31.048687] ================================================================== [ 31.049596] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.050544] Read of size 8 at addr ffff88800d52c968 by task sshd/220 [ 31.051303] [ 31.051521] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.052491] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.053467] Call Trace: [ 31.053787] [ 31.054069] dump_stack_lvl+0x91/0xf0 [ 31.054569] print_report+0xcc/0x620 [ 31.055053] ? __virt_addr_valid+0x102/0x340 [ 31.055640] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.056281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.056933] kasan_report+0xbe/0xf0 [ 31.057418] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.058040] vma_interval_tree_remove+0xc75/0xec0 [ 31.058650] vma_prepare+0xc54/0x11a0 [ 31.059144] __split_vma+0x5af/0x950 [ 31.059623] ? __pfx___split_vma+0x10/0x10 [ 31.060155] ? find_held_lock+0x2c/0x110 [ 31.060688] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.061252] ? lock_is_held_type+0x9f/0x120 [ 31.061797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.062416] ? mtree_range_walk+0x632/0x900 [ 31.062980] ? mas_walk+0x5c7/0x7c0 [ 31.063459] do_vmi_munmap+0x1f1/0x2b0 [ 31.063960] mmap_region+0x1f9/0x2660 [ 31.064449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.064980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.065706] ? __pfx_lock_acquire+0x10/0x10 [ 31.066244] ? __pfx_mmap_region+0x10/0x10 [ 31.066775] ? security_mmap_addr+0x7d/0xa0 [ 31.067316] ? get_unmapped_area+0x1f5/0x3f0 [ 31.067869] do_mmap+0x854/0xf00 [ 31.068313] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.068828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.069388] ksys_mmap_pgoff+0x3af/0x500 [ 31.069895] do_syscall_64+0x3f/0x90 [ 31.070376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.071018] RIP: 0033:0x7fce92b00d82 [ 31.071485] 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 [ 31.073630] RSP: 002b:00007ffe067934f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.074553] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fce92b00d82 [ 31.075490] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fce91f3a000 [ 31.076444] RBP: 00007fce91f3a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.077395] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563866773ec0 [ 31.078344] R13: 00007ffe06793510 R14: 00007ffe06793540 R15: 00007ffe067938a0 [ 31.079288] [ 31.079617] [ 31.079853] Allocated by task 213: [ 31.080323] kasan_save_stack+0x22/0x50 [ 31.080887] kasan_set_track+0x25/0x30 [ 31.081435] __kasan_slab_alloc+0x59/0x70 [ 31.082018] kmem_cache_alloc+0x16b/0x370 [ 31.082589] vm_area_dup+0x20/0x160 [ 31.083099] __split_vma+0x170/0x950 [ 31.083611] split_vma+0xc6/0x110 [ 31.084096] mprotect_fixup+0x8d2/0xb30 [ 31.084663] do_mprotect_pkey+0x87e/0xd40 [ 31.085229] __x64_sys_mprotect+0x78/0xc0 [ 31.085798] do_syscall_64+0x3f/0x90 [ 31.086327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.087043] [ 31.087283] Freed by task 213: [ 31.087714] kasan_save_stack+0x22/0x50 [ 31.088264] kasan_set_track+0x25/0x30 [ 31.088818] kasan_save_free_info+0x2b/0x50 [ 31.089412] __kasan_slab_free+0x10a/0x190 [ 31.090015] kmem_cache_free+0x10d/0x4d0 [ 31.090575] rcu_core+0x8c8/0x2860 [ 31.091062] __do_softirq+0x1b7/0x7d4 [ 31.091597] [ 31.091839] Last potentially related work creation: [ 31.092524] kasan_save_stack+0x22/0x50 [ 31.093091] __kasan_record_aux_stack+0x8e/0xa0 [ 31.093738] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.094466] remove_vma+0x139/0x170 [ 31.094958] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.095572] do_vmi_munmap+0x1f1/0x2b0 [ 31.096102] __vm_munmap+0x138/0x3a0 [ 31.096608] __x64_sys_munmap+0x59/0x80 [ 31.097180] do_syscall_64+0x3f/0x90 [ 31.097697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.098425] [ 31.098665] The buggy address belongs to the object at ffff88800d52c910 [ 31.098665] which belongs to the cache vm_area_struct of size 168 [ 31.100254] The buggy address is located 88 bytes inside of [ 31.100254] freed 168-byte region [ffff88800d52c910, ffff88800d52c9b8) [ 31.101682] [ 31.101902] The buggy address belongs to the physical page: [ 31.102571] page:00000000c751ee33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd52c [ 31.103672] memcg:ffff8880167cab01 [ 31.104106] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.104761] page_type: 0xffffffff() [ 31.105217] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.106126] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167cab01 [ 31.107032] page dumped because: kasan: bad access detected [ 31.107694] [ 31.107911] Memory state around the buggy address: [ 31.108493] ffff88800d52c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.109372] ffff88800d52c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.110222] >ffff88800d52c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.111067] ^ [ 31.111855] ffff88800d52c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.112726] ffff88800d52ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.113573] ================================================================== [ 31.114503] Disabling lock debugging due to kernel taint [ 33.483938] BUG: Bad rss-counter state mm:0000000047e4e71d type:MM_FILEPAGES val:33 [ 33.485389] BUG: Bad rss-counter state mm:0000000047e4e71d type:MM_ANONPAGES val:22 [ 33.982079] BUG: Bad rss-counter state mm:00000000df7b38eb type:MM_FILEPAGES val:33 [ 33.983411] BUG: Bad rss-counter state mm:00000000df7b38eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22376' (ECDSA) to the list of known hosts. 2023/06/21 02:47:04 fuzzer started 2023/06/21 02:47:04 dialing manager at localhost:36067 2023/06/21 02:47:04 checking machine... 2023/06/21 02:47:04 checking revisions... [ 34.653337] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:47:04 testing simple program... [ 34.704947] cgroup: Unknown subsys name 'net' [ 34.745516] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:47:04 Registers: info registers vcpu 0 RAX=ffffe8ffffc0bf10 RBX=000000000002c3c0 RCX=1ffffd1ffff817e9 RDX=dffffc0000000000 RSI=ffffffff8145347c RDI=ffffe8ffffc0bf48 RBP=ffffffff852c7900 RSP=ffff888008d9fb98 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880146a2000 R13=0000000000000000 R14=ffff88806ce00000 R15=ffff8880146a23a8 RIP=ffffffff814534e6 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 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=00007f5393011000 CR3=000000000caea000 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=8593d2e9a4b919b9a84e03f654e3e69c XMM02=eff9b2d0a8fce9cb000000000011b7b8 XMM03=2c67c8bc2e329bc3000000000011b8e0 XMM04=020cb4c680d275b200000000000ae988 XMM05=adf4c9ed75ca0ed10000000000133ec8 XMM06=4fda316b135da52b0000000000132cb8 XMM07=fb795ef6d65770560000000000122d90 XMM08=2c67c8bc2e329bc3000000000011b8e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8120686f RCX=0000000000000001 RDX=1ffff110011c6f3a RSI=ffff888008e37ef0 RDI=ffffffff8120686f RBP=ffffffff8120686f RSP=ffff888008e37930 R8 =0000000000000001 R9 =ffff888008e379b8 R10=0000000000038001 R11=000000000000a20c R12=ffff888008e37a40 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff88801659ac60 RIP=ffffffff811fc6f0 RFL=00000292 [--S-A--] 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=00007f2c6134f650 CR3=000000000fb7a000 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