syzkaller login: [ 30.150073] BUG: Bad rss-counter state mm:0000000082deb57a type:MM_FILEPAGES val:33 [ 30.151659] BUG: Bad rss-counter state mm:0000000082deb57a type:MM_ANONPAGES val:22 [ 30.193951] ================================================================== [ 30.195256] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.196278] Read of size 8 at addr ffff88800eef4ed8 by task sshd/220 [ 30.197123] [ 30.197393] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.198405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.199455] Call Trace: [ 30.199804] [ 30.200147] dump_stack_lvl+0x91/0xf0 [ 30.200717] print_report+0xcc/0x620 [ 30.201207] ? __virt_addr_valid+0x102/0x340 [ 30.201873] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.202498] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.203124] kasan_report+0xbe/0xf0 [ 30.203752] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.204387] vma_interval_tree_remove+0xc75/0xec0 [ 30.205010] vma_prepare+0xc54/0x11a0 [ 30.205534] __split_vma+0x5af/0x950 [ 30.206004] ? __pfx___split_vma+0x10/0x10 [ 30.206533] ? find_held_lock+0x2c/0x110 [ 30.207059] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.207628] ? lock_is_held_type+0x9f/0x120 [ 30.208167] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.208806] ? mtree_range_walk+0x632/0x900 [ 30.209403] ? mas_walk+0x5c7/0x7c0 [ 30.209886] do_vmi_munmap+0x1f1/0x2b0 [ 30.210381] mmap_region+0x1f9/0x2660 [ 30.210862] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.211381] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.212100] ? __pfx_lock_acquire+0x10/0x10 [ 30.212661] ? __pfx_mmap_region+0x10/0x10 [ 30.213199] ? security_mmap_addr+0x7d/0xa0 [ 30.213782] ? get_unmapped_area+0x1f5/0x3f0 [ 30.214350] do_mmap+0x854/0xf00 [ 30.214789] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.215292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.215863] ksys_mmap_pgoff+0x3af/0x500 [ 30.216371] do_syscall_64+0x3f/0x90 [ 30.216870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.217557] RIP: 0033:0x7f57364c7d82 [ 30.218022] 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 [ 30.220167] RSP: 002b:00007ffd86043ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.221092] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57364c7d82 [ 30.221981] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5735901000 [ 30.222832] RBP: 00007f5735901000 R08: 0000000000000009 R09: 0000000000001000 [ 30.223679] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565210e4aec0 [ 30.224548] R13: 00007ffd86043af0 R14: 00007ffd86043b20 R15: 00007ffd86043e80 [ 30.225455] [ 30.225754] [ 30.225972] Allocated by task 213: [ 30.226413] kasan_save_stack+0x22/0x50 [ 30.226919] kasan_set_track+0x25/0x30 [ 30.227413] __kasan_slab_alloc+0x59/0x70 [ 30.227952] kmem_cache_alloc+0x16b/0x370 [ 30.228474] vm_area_dup+0x20/0x160 [ 30.229052] __split_vma+0x170/0x950 [ 30.229576] split_vma+0xc6/0x110 [ 30.230032] mprotect_fixup+0x8d2/0xb30 [ 30.230540] do_mprotect_pkey+0x87e/0xd40 [ 30.231062] __x64_sys_mprotect+0x78/0xc0 [ 30.231592] do_syscall_64+0x3f/0x90 [ 30.232072] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.232752] [ 30.232972] Freed by task 213: [ 30.233406] kasan_save_stack+0x22/0x50 [ 30.233914] kasan_set_track+0x25/0x30 [ 30.234410] kasan_save_free_info+0x2b/0x50 [ 30.234947] __kasan_slab_free+0x10a/0x190 [ 30.235481] kmem_cache_free+0x10d/0x4d0 [ 30.236000] rcu_core+0x8c8/0x2860 [ 30.236452] __do_softirq+0x1b7/0x7d4 [ 30.236956] [ 30.237170] Last potentially related work creation: [ 30.237792] kasan_save_stack+0x22/0x50 [ 30.238308] __kasan_record_aux_stack+0x8e/0xa0 [ 30.238896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.239545] remove_vma+0x139/0x170 [ 30.240001] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.240585] do_vmi_munmap+0x1f1/0x2b0 [ 30.241070] __vm_munmap+0x138/0x3a0 [ 30.241580] __x64_sys_munmap+0x59/0x80 [ 30.242080] do_syscall_64+0x3f/0x90 [ 30.242556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.243209] [ 30.243427] Second to last potentially related work creation: [ 30.244113] kasan_save_stack+0x22/0x50 [ 30.244639] __kasan_record_aux_stack+0x8e/0xa0 [ 30.245217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.245897] remove_vma+0x139/0x170 [ 30.246354] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.246910] do_vmi_munmap+0x1f1/0x2b0 [ 30.247408] mmap_region+0x1f9/0x2660 [ 30.247887] do_mmap+0x854/0xf00 [ 30.248320] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.248832] ksys_mmap_pgoff+0x3af/0x500 [ 30.249376] do_syscall_64+0x3f/0x90 [ 30.249855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.250495] [ 30.250710] The buggy address belongs to the object at ffff88800eef4e80 [ 30.250710] which belongs to the cache vm_area_struct of size 168 [ 30.252195] The buggy address is located 88 bytes inside of [ 30.252195] freed 168-byte region [ffff88800eef4e80, ffff88800eef4f28) [ 30.253843] [ 30.254066] The buggy address belongs to the physical page: [ 30.254748] page:000000005164e1ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeef4 [ 30.255835] memcg:ffff88800ef73d01 [ 30.256265] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.256929] page_type: 0xffffffff() [ 30.257383] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.258303] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef73d01 [ 30.259211] page dumped because: kasan: bad access detected [ 30.259867] [ 30.260085] Memory state around the buggy address: [ 30.260683] ffff88800eef4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.261547] ffff88800eef4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.262401] >ffff88800eef4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.263249] ^ [ 30.263971] ffff88800eef4f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.264869] ffff88800eef4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.265729] ================================================================== [ 30.266680] Disabling lock debugging due to kernel taint [ 32.215367] BUG: Bad rss-counter state mm:000000007e2c75c4 type:MM_FILEPAGES val:33 [ 32.216412] BUG: Bad rss-counter state mm:000000007e2c75c4 type:MM_ANONPAGES val:22 [ 32.677594] BUG: Bad rss-counter state mm:000000006572696f type:MM_FILEPAGES val:33 [ 32.678559] BUG: Bad rss-counter state mm:000000006572696f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53789' (ECDSA) to the list of known hosts. 2023/06/20 14:15:25 fuzzer started 2023/06/20 14:15:25 dialing manager at localhost:36067 2023/06/20 14:15:25 checking machine... 2023/06/20 14:15:25 checking revisions... [ 33.404270] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:15:26 testing simple program... [ 33.454510] cgroup: Unknown subsys name 'net' [ 33.504576] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:15:25 Registers: info registers vcpu 0 RAX=ffffffff8180c6a2 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09b01 RSI=ffff88806ce09ba8 RDI=ffff88806ce09ba8 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff860d825a R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09bb0 R15=ffff88806ce09a78 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f844eb0f700 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=00007f753c1f80b0 CR3=000000000e300000 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=2035323a35313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a35313a3431203032 XMM08=3d656e696c646d632022656369767265 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=00007fad0f7b5910 CR3=000000000d7e6000 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=25c1b293982454873f408f3e75bb10d2 XMM02=2c67c8bc2e329bc3000000000011b3f8 XMM03=fb795ef6d657705600000000001221a0 XMM04=e6245b749daa219200000000000ae988 XMM05=19e9129bd510f23500000000001333d0 XMM06=4fda316b135da52b0000000000133258 XMM07=e042d86d42eb936e0000000000122420 XMM08=5ec02b2a97b6d377000000000011b458 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000