syzkaller login: [ 30.846636] BUG: Bad rss-counter state mm:000000006b0484a6 type:MM_FILEPAGES val:33 [ 30.847901] BUG: Bad rss-counter state mm:000000006b0484a6 type:MM_ANONPAGES val:22 [ 30.942343] ================================================================== [ 30.943235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.944171] Read of size 8 at addr ffff88800dad4df0 by task sshd/220 [ 30.944958] [ 30.945175] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.946120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.947098] Call Trace: [ 30.947416] [ 30.947721] dump_stack_lvl+0x91/0xf0 [ 30.948218] print_report+0xcc/0x620 [ 30.948700] ? __virt_addr_valid+0x102/0x340 [ 30.949266] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.949889] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.950499] kasan_report+0xbe/0xf0 [ 30.950975] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.951592] vma_interval_tree_remove+0xc75/0xec0 [ 30.952191] vma_prepare+0xc54/0x11a0 [ 30.952659] __split_vma+0x5af/0x950 [ 30.953138] ? __pfx___split_vma+0x10/0x10 [ 30.953658] ? find_held_lock+0x2c/0x110 [ 30.954180] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.954734] ? lock_is_held_type+0x9f/0x120 [ 30.955271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.955868] ? mtree_range_walk+0x632/0x900 [ 30.956412] ? mas_walk+0x5c7/0x7c0 [ 30.956906] do_vmi_munmap+0x1f1/0x2b0 [ 30.957400] mmap_region+0x1f9/0x2660 [ 30.957878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.958388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.959105] ? __pfx_lock_acquire+0x10/0x10 [ 30.959630] ? __pfx_mmap_region+0x10/0x10 [ 30.960159] ? security_mmap_addr+0x7d/0xa0 [ 30.960682] ? get_unmapped_area+0x1f5/0x3f0 [ 30.961236] do_mmap+0x854/0xf00 [ 30.961670] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.962158] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.962713] ksys_mmap_pgoff+0x3af/0x500 [ 30.963220] do_syscall_64+0x3f/0x90 [ 30.963693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.964329] RIP: 0033:0x7f89a3ddad82 [ 30.964783] 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 [ 30.966908] RSP: 002b:00007fff25c6bc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.967811] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f89a3ddad82 [ 30.968659] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f89a3214000 [ 30.969518] RBP: 00007f89a3214000 R08: 0000000000000009 R09: 0000000000001000 [ 30.970359] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592b3d65ec0 [ 30.971206] R13: 00007fff25c6bca0 R14: 00007fff25c6bcd0 R15: 00007fff25c6c030 [ 30.972055] [ 30.972346] [ 30.972564] Allocated by task 213: [ 30.972996] kasan_save_stack+0x22/0x50 [ 30.973495] kasan_set_track+0x25/0x30 [ 30.973986] __kasan_slab_alloc+0x59/0x70 [ 30.974503] kmem_cache_alloc+0x16b/0x370 [ 30.975013] vm_area_dup+0x20/0x160 [ 30.975461] __split_vma+0x170/0x950 [ 30.975922] split_vma+0xc6/0x110 [ 30.976355] mprotect_fixup+0x8d2/0xb30 [ 30.976855] do_mprotect_pkey+0x87e/0xd40 [ 30.977401] __x64_sys_mprotect+0x78/0xc0 [ 30.977924] do_syscall_64+0x3f/0x90 [ 30.978394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.979033] [ 30.979246] Freed by task 19: [ 30.979625] kasan_save_stack+0x22/0x50 [ 30.980128] kasan_set_track+0x25/0x30 [ 30.980617] kasan_save_free_info+0x2b/0x50 [ 30.981151] __kasan_slab_free+0x10a/0x190 [ 30.981677] kmem_cache_free+0x10d/0x4d0 [ 30.982186] rcu_core+0x8c8/0x2860 [ 30.982631] __do_softirq+0x1b7/0x7d4 [ 30.983112] [ 30.983325] Last potentially related work creation: [ 30.983905] kasan_save_stack+0x22/0x50 [ 30.984403] __kasan_record_aux_stack+0x8e/0xa0 [ 30.985004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.985639] remove_vma+0x139/0x170 [ 30.986087] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.986637] do_vmi_munmap+0x1f1/0x2b0 [ 30.987119] __vm_munmap+0x138/0x3a0 [ 30.987587] __x64_sys_munmap+0x59/0x80 [ 30.988083] do_syscall_64+0x3f/0x90 [ 30.988551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.989195] [ 30.989409] The buggy address belongs to the object at ffff88800dad4d98 [ 30.989409] which belongs to the cache vm_area_struct of size 168 [ 30.990869] The buggy address is located 88 bytes inside of [ 30.990869] freed 168-byte region [ffff88800dad4d98, ffff88800dad4e40) [ 30.992265] [ 30.992480] The buggy address belongs to the physical page: [ 30.993144] page:0000000060692c4f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdad4 [ 30.994219] memcg:ffff8880167a6701 [ 30.994640] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.995277] page_type: 0xffffffff() [ 30.995721] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.996629] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167a6701 [ 30.997538] page dumped because: kasan: bad access detected [ 30.998197] [ 30.998410] Memory state around the buggy address: [ 30.998991] ffff88800dad4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.999836] ffff88800dad4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.000686] >ffff88800dad4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.001541] ^ [ 31.002346] ffff88800dad4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.003192] ffff88800dad4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.004034] ================================================================== [ 31.005083] Disabling lock debugging due to kernel taint [ 32.793408] BUG: Bad rss-counter state mm:00000000867d17df type:MM_FILEPAGES val:33 [ 32.794160] BUG: Bad rss-counter state mm:00000000867d17df type:MM_ANONPAGES val:22 [ 33.163158] BUG: Bad rss-counter state mm:0000000033578cf9 type:MM_FILEPAGES val:33 [ 33.163776] BUG: Bad rss-counter state mm:0000000033578cf9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50329' (ECDSA) to the list of known hosts. 2023/06/20 12:13:58 fuzzer started 2023/06/20 12:13:58 dialing manager at localhost:36067 2023/06/20 12:13:58 checking machine... 2023/06/20 12:13:58 checking revisions... [ 33.806320] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:13:58 testing simple program... [ 33.839518] cgroup: Unknown subsys name 'net' [ 33.889614] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:13:58 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=00007f240917e790 CR3=00000000096ee000 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=62987e0e5d0af6a6624d7f7ed4d6f0e7 XMM02=000000000011ac78eff9b2d0a8fce9cb XMM03=000000000011ad482c67c8bc2e329bc3 XMM04=495f3c5c61f416da00000000000ae988 XMM05=19e9129bd510f2350000000000132148 XMM06=4fda316b135da52b0000000000131fd0 XMM07=e042d86d42eb936e00000000001224e0 XMM08=1939c3d07b01da80000000000011ad48 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09a98 RCX=ffffffff863de47e RDX=1ffff1100d9e1353 RSI=ffff888017f97b10 RDI=ffff88806cf09a98 RBP=ffff888017f97b10 RSP=ffff88806cf099f0 R8 =ffffffff863de482 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000091be9 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff888017f97b18 R15=ffff88806cf09a98 RIP=ffffffff8113041a 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 00007fcc21c05900 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=00007ffddbb5d000 CR3=0000000015f7c000 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