syzkaller login: [ 50.159831] BUG: Bad rss-counter state mm:00000000be13da0b type:MM_FILEPAGES val:33 [ 50.161038] BUG: Bad rss-counter state mm:00000000be13da0b type:MM_ANONPAGES val:22 [ 50.200897] ================================================================== [ 50.201902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.203005] Read of size 8 at addr ffff888019b5b880 by task sshd/220 [ 50.203766] [ 50.204003] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.205150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.206119] Call Trace: [ 50.206439] [ 50.206722] dump_stack_lvl+0x91/0xf0 [ 50.207229] print_report+0xcc/0x620 [ 50.207712] ? __virt_addr_valid+0x102/0x340 [ 50.208259] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.208879] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.209491] kasan_report+0xbe/0xf0 [ 50.209959] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.210589] vma_interval_tree_remove+0xc75/0xec0 [ 50.211185] vma_prepare+0xc54/0x11a0 [ 50.211669] __split_vma+0x5af/0x950 [ 50.212138] ? __pfx___split_vma+0x10/0x10 [ 50.212674] ? find_held_lock+0x2c/0x110 [ 50.213198] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.213757] ? lock_is_held_type+0x9f/0x120 [ 50.214290] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.214913] ? mtree_range_walk+0x632/0x900 [ 50.215468] ? mas_walk+0x5c7/0x7c0 [ 50.215943] do_vmi_munmap+0x1f1/0x2b0 [ 50.216436] mmap_region+0x1f9/0x2660 [ 50.216935] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.217444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.218164] ? __pfx_lock_acquire+0x10/0x10 [ 50.218700] ? __pfx_mmap_region+0x10/0x10 [ 50.219237] ? security_mmap_addr+0x7d/0xa0 [ 50.219764] ? get_unmapped_area+0x1f5/0x3f0 [ 50.220310] do_mmap+0x854/0xf00 [ 50.220767] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.221266] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.221830] ksys_mmap_pgoff+0x3af/0x500 [ 50.222335] do_syscall_64+0x3f/0x90 [ 50.222810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.223452] RIP: 0033:0x7ff885286d82 [ 50.223903] 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 [ 50.226031] RSP: 002b:00007ffd047b55a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.226931] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff885286d82 [ 50.227774] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8846c0000 [ 50.228613] RBP: 00007ff8846c0000 R08: 0000000000000009 R09: 0000000000001000 [ 50.229470] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c10050af70 [ 50.230316] R13: 00007ffd047b55c0 R14: 00007ffd047b55f0 R15: 00007ffd047b5950 [ 50.231158] [ 50.231455] [ 50.231667] Allocated by task 213: [ 50.232089] kasan_save_stack+0x22/0x50 [ 50.232600] kasan_set_track+0x25/0x30 [ 50.233100] __kasan_slab_alloc+0x59/0x70 [ 50.233619] kmem_cache_alloc+0x16b/0x370 [ 50.234132] vm_area_dup+0x20/0x160 [ 50.234589] __split_vma+0x170/0x950 [ 50.235054] split_vma+0xc6/0x110 [ 50.235492] mprotect_fixup+0x8d2/0xb30 [ 50.235993] do_mprotect_pkey+0x87e/0xd40 [ 50.236508] __x64_sys_mprotect+0x78/0xc0 [ 50.237041] do_syscall_64+0x3f/0x90 [ 50.237513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.238157] [ 50.238372] Freed by task 213: [ 50.238770] kasan_save_stack+0x22/0x50 [ 50.239266] kasan_set_track+0x25/0x30 [ 50.239755] kasan_save_free_info+0x2b/0x50 [ 50.240291] __kasan_slab_free+0x10a/0x190 [ 50.240828] kmem_cache_free+0x10d/0x4d0 [ 50.241332] rcu_core+0x8c8/0x2860 [ 50.241772] __do_softirq+0x1b7/0x7d4 [ 50.242242] [ 50.242456] Last potentially related work creation: [ 50.243041] kasan_save_stack+0x22/0x50 [ 50.243546] __kasan_record_aux_stack+0x8e/0xa0 [ 50.244118] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.244758] remove_vma+0x139/0x170 [ 50.245206] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.245848] do_vmi_munmap+0x1f1/0x2b0 [ 50.246329] __vm_munmap+0x138/0x3a0 [ 50.246797] __x64_sys_munmap+0x59/0x80 [ 50.247293] do_syscall_64+0x3f/0x90 [ 50.247765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.248402] [ 50.248615] The buggy address belongs to the object at ffff888019b5b828 [ 50.248615] which belongs to the cache vm_area_struct of size 168 [ 50.250077] The buggy address is located 88 bytes inside of [ 50.250077] freed 168-byte region [ffff888019b5b828, ffff888019b5b8d0) [ 50.251472] [ 50.251696] The buggy address belongs to the physical page: [ 50.252398] page:00000000b88adae6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b5b [ 50.253560] memcg:ffff88800e045a01 [ 50.254002] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.254685] page_type: 0xffffffff() [ 50.255162] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.256134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e045a01 [ 50.257121] page dumped because: kasan: bad access detected [ 50.257817] [ 50.258039] Memory state around the buggy address: [ 50.258657] ffff888019b5b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 50.259552] ffff888019b5b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 50.260446] >ffff888019b5b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 50.261349] ^ [ 50.261778] ffff888019b5b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.262683] ffff888019b5b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 50.263582] ================================================================== [ 50.264556] Disabling lock debugging due to kernel taint [ 52.477494] BUG: Bad rss-counter state mm:0000000005fe15f6 type:MM_FILEPAGES val:33 [ 52.478506] BUG: Bad rss-counter state mm:0000000005fe15f6 type:MM_ANONPAGES val:22 [ 53.050162] BUG: Bad rss-counter state mm:00000000745072a8 type:MM_FILEPAGES val:33 [ 53.051343] BUG: Bad rss-counter state mm:00000000745072a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54578' (ECDSA) to the list of known hosts. 2023/06/20 06:53:56 fuzzer started 2023/06/20 06:53:57 dialing manager at localhost:44161 2023/06/20 06:53:57 checking machine... 2023/06/20 06:53:57 checking revisions... [ 53.705438] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:53:57 testing simple program... [ 53.756777] cgroup: Unknown subsys name 'net' [ 53.813393] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:53:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016f27360 RCX=0000000000000001 RDX=1ffff11002de4e6d RSI=ffffffff8180995d RDI=ffff888016f27368 RBP=0000000000000004 RSP=ffff888016f27278 R8 =0000000000000001 R9 =ffff888016f272d8 R10=0000000000038001 R11=0000000000020dae R12=ffff888016f27360 R13=0000000000000000 R14=ffff888015d4d1c0 R15=ffff888016fed300 RIP=ffffffff813ad485 RFL=00000283 [--S---C] 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 00007fa1b536f700 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=00007ffc626aa478 CR3=000000000e940000 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=00007f6cfca8c510000055afc3229790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100272a240 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000482cc0 RSI=ffff888013951000 RDI=0000000000000200 RBP=ffff88800844f140 RSP=ffff888014797678 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed100272a240 R11=00000000000b6996 R12=ffff888013951000 R13=0000000000482cc0 R14=ffffffff8366cbd9 R15=0000000000000200 RIP=ffffffff8180f3eb 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 00007f1b81753900 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=00007fd23eaa0650 CR3=000000000c596000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=955981f22806413000000000000ae988 XMM05=0d76bdb1c1685f2b0000000000135a20 XMM06=4fda316b135da52b0000000000134810 XMM07=fb795ef6d65770560000000000124da0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000