syzkaller login: [ 60.729415] BUG: Bad rss-counter state mm:000000008d00bd66 type:MM_FILEPAGES val:33 [ 60.730601] BUG: Bad rss-counter state mm:000000008d00bd66 type:MM_ANONPAGES val:22 [ 60.764754] ================================================================== [ 60.765733] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.766812] Read of size 8 at addr ffff88800fe65c20 by task sshd/219 [ 60.767624] [ 60.767836] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.768652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.769567] Call Trace: [ 60.769867] [ 60.770156] dump_stack_lvl+0x91/0xf0 [ 60.770630] print_report+0xcc/0x620 [ 60.771091] ? __virt_addr_valid+0x102/0x340 [ 60.771612] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.772192] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.772775] kasan_report+0xbe/0xf0 [ 60.773225] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.773812] vma_interval_tree_remove+0xc75/0xec0 [ 60.774393] vma_prepare+0xc54/0x11a0 [ 60.774870] __split_vma+0x5af/0x950 [ 60.775345] ? __pfx___split_vma+0x10/0x10 [ 60.775880] ? find_held_lock+0x2c/0x110 [ 60.776406] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.777131] ? lock_is_held_type+0x9f/0x120 [ 60.777672] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.778292] ? mtree_range_walk+0x632/0x900 [ 60.778850] ? mas_walk+0x5c7/0x7c0 [ 60.779326] do_vmi_munmap+0x1f1/0x2b0 [ 60.779829] mmap_region+0x1f9/0x2660 [ 60.780315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.780823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.781534] ? __pfx_lock_acquire+0x10/0x10 [ 60.782078] ? __pfx_mmap_region+0x10/0x10 [ 60.782614] ? security_mmap_addr+0x7d/0xa0 [ 60.783151] ? get_unmapped_area+0x1f5/0x3f0 [ 60.783699] do_mmap+0x854/0xf00 [ 60.784139] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.784641] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.785205] ksys_mmap_pgoff+0x3af/0x500 [ 60.785718] do_syscall_64+0x3f/0x90 [ 60.786212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.786868] RIP: 0033:0x7f9bce490d82 [ 60.787328] 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 [ 60.789472] RSP: 002b:00007ffcd281a218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.790391] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9bce490d82 [ 60.791231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9bcd8ca000 [ 60.792090] RBP: 00007f9bcd8ca000 R08: 0000000000000009 R09: 0000000000001000 [ 60.792941] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f884979ec0 [ 60.793786] R13: 00007ffcd281a230 R14: 00007ffcd281a260 R15: 00007ffcd281a5c0 [ 60.794678] [ 60.794968] [ 60.795185] Allocated by task 212: [ 60.795618] kasan_save_stack+0x22/0x50 [ 60.796115] kasan_set_track+0x25/0x30 [ 60.796604] __kasan_slab_alloc+0x59/0x70 [ 60.797126] kmem_cache_alloc+0x16b/0x370 [ 60.797652] vm_area_dup+0x20/0x160 [ 60.798117] __split_vma+0x170/0x950 [ 60.798588] split_vma+0xc6/0x110 [ 60.799030] mprotect_fixup+0x8d2/0xb30 [ 60.799548] do_mprotect_pkey+0x87e/0xd40 [ 60.800085] __x64_sys_mprotect+0x78/0xc0 [ 60.800618] do_syscall_64+0x3f/0x90 [ 60.801100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.801755] [ 60.801973] Freed by task 212: [ 60.802398] kasan_save_stack+0x22/0x50 [ 60.802901] kasan_set_track+0x25/0x30 [ 60.803401] kasan_save_free_info+0x2b/0x50 [ 60.803939] __kasan_slab_free+0x10a/0x190 [ 60.804474] kmem_cache_free+0x10d/0x4d0 [ 60.804986] rcu_core+0x8c8/0x2860 [ 60.805440] __do_softirq+0x1b7/0x7d4 [ 60.805953] [ 60.806181] Last potentially related work creation: [ 60.806797] kasan_save_stack+0x22/0x50 [ 60.807315] __kasan_record_aux_stack+0x8e/0xa0 [ 60.807894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.808559] remove_vma+0x139/0x170 [ 60.809015] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.809586] do_vmi_munmap+0x1f1/0x2b0 [ 60.810110] __vm_munmap+0x138/0x3a0 [ 60.810613] __x64_sys_munmap+0x59/0x80 [ 60.811136] do_syscall_64+0x3f/0x90 [ 60.811624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.812278] [ 60.812493] The buggy address belongs to the object at ffff88800fe65bc8 [ 60.812493] which belongs to the cache vm_area_struct of size 168 [ 60.814004] The buggy address is located 88 bytes inside of [ 60.814004] freed 168-byte region [ffff88800fe65bc8, ffff88800fe65c70) [ 60.815499] [ 60.815721] The buggy address belongs to the physical page: [ 60.816411] page:00000000360c7c5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe65 [ 60.817534] memcg:ffff88800ea97201 [ 60.817969] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.818638] page_type: 0xffffffff() [ 60.819103] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.820055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea97201 [ 60.821002] page dumped because: kasan: bad access detected [ 60.821698] [ 60.821924] Memory state around the buggy address: [ 60.822537] ffff88800fe65b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.823418] ffff88800fe65b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.824311] >ffff88800fe65c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.825205] ^ [ 60.825765] ffff88800fe65c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.826667] ffff88800fe65d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.827550] ================================================================== [ 60.828768] Disabling lock debugging due to kernel taint [ 62.734818] BUG: Bad rss-counter state mm:000000009f7fd378 type:MM_FILEPAGES val:33 [ 62.736329] BUG: Bad rss-counter state mm:000000009f7fd378 type:MM_ANONPAGES val:22 [ 63.207943] BUG: Bad rss-counter state mm:0000000039022348 type:MM_FILEPAGES val:33 [ 63.208951] BUG: Bad rss-counter state mm:0000000039022348 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59296' (ECDSA) to the list of known hosts. 2023/06/21 04:19:52 fuzzer started 2023/06/21 04:19:52 dialing manager at localhost:36067 2023/06/21 04:19:52 checking machine... 2023/06/21 04:19:52 checking revisions... [ 63.945944] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:19:53 testing simple program... [ 63.989320] cgroup: Unknown subsys name 'net' [ 64.030611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:19:52 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=00007f0f0eea5b60 CR3=0000000009656000 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=66f6fa2081fc679c294cd0724c027c19 XMM02=2c67c8bc2e329bc3000000000011a5a8 XMM03=fb795ef6d65770560000000000121a48 XMM04=7c744a9c4ab36c5800000000000ae988 XMM05=dfcdbad4f1609c370000000000131910 XMM06=806171799158d9670000000000131798 XMM07=e042d86d42eb936e0000000000121cc8 XMM08=ae39f917c82ee0f9000000000011a608 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0b749c4 RBX=fffffbfff0b749c5 RCX=ffffffff812e0473 RDX=fffffbfff0b749c5 RSI=0000000000000004 RDI=ffffffff85ba4e20 RBP=fffffbfff0b749c4 RSP=ffff88800c66fbd8 R8 =0000000000000000 R9 =fffffbfff0b749c4 R10=ffffffff85ba4e23 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000003 R15=0000000000000246 RIP=ffffffff8180f189 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 00007fe3978d9900 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=00007ffcfc873000 CR3=000000000df3c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000