syzkaller login: [ 31.083479] BUG: Bad rss-counter state mm:0000000048667ed3 type:MM_FILEPAGES val:33 [ 31.084267] BUG: Bad rss-counter state mm:0000000048667ed3 type:MM_ANONPAGES val:22 [ 31.195797] ================================================================== [ 31.196462] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.197139] Read of size 8 at addr ffff88800ef4f310 by task sshd/220 [ 31.197706] [ 31.197865] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.198514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.199220] Call Trace: [ 31.199456] [ 31.199663] dump_stack_lvl+0x91/0xf0 [ 31.200104] print_report+0xcc/0x620 [ 31.200450] ? __virt_addr_valid+0x102/0x340 [ 31.200850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201295] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.201757] kasan_report+0xbe/0xf0 [ 31.202152] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.202611] vma_interval_tree_remove+0xc75/0xec0 [ 31.203074] vma_prepare+0xc54/0x11a0 [ 31.203423] __split_vma+0x5af/0x950 [ 31.203772] ? __pfx___split_vma+0x10/0x10 [ 31.204166] ? find_held_lock+0x2c/0x110 [ 31.204553] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.204973] ? lock_is_held_type+0x9f/0x120 [ 31.205362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.205800] ? mtree_range_walk+0x632/0x900 [ 31.206221] ? mas_walk+0x5c7/0x7c0 [ 31.206566] do_vmi_munmap+0x1f1/0x2b0 [ 31.206933] mmap_region+0x1f9/0x2660 [ 31.207285] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.207660] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.208185] ? __pfx_lock_acquire+0x10/0x10 [ 31.208579] ? __pfx_mmap_region+0x10/0x10 [ 31.208969] ? security_mmap_addr+0x7d/0xa0 [ 31.209363] ? get_unmapped_area+0x1f5/0x3f0 [ 31.209769] do_mmap+0x854/0xf00 [ 31.210110] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.210478] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.210894] ksys_mmap_pgoff+0x3af/0x500 [ 31.211268] do_syscall_64+0x3f/0x90 [ 31.211626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.212094] RIP: 0033:0x7f8c38dcbd82 [ 31.212430] 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 [ 31.214009] RSP: 002b:00007ffe61955f88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.214687] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c38dcbd82 [ 31.215348] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c38205000 [ 31.215969] RBP: 00007f8c38205000 R08: 0000000000000009 R09: 0000000000001000 [ 31.216607] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7b18afec0 [ 31.217251] R13: 00007ffe61955fa0 R14: 00007ffe61955fd0 R15: 00007ffe61956330 [ 31.217891] [ 31.218109] [ 31.218265] Allocated by task 213: [ 31.218583] kasan_save_stack+0x22/0x50 [ 31.218970] kasan_set_track+0x25/0x30 [ 31.219344] __kasan_slab_alloc+0x59/0x70 [ 31.219729] kmem_cache_alloc+0x16b/0x370 [ 31.220111] vm_area_dup+0x20/0x160 [ 31.220443] __split_vma+0x170/0x950 [ 31.220792] split_vma+0xc6/0x110 [ 31.221110] mprotect_fixup+0x8d2/0xb30 [ 31.221491] do_mprotect_pkey+0x87e/0xd40 [ 31.221879] __x64_sys_mprotect+0x78/0xc0 [ 31.222284] do_syscall_64+0x3f/0x90 [ 31.222635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223107] [ 31.223268] Freed by task 19: [ 31.223549] kasan_save_stack+0x22/0x50 [ 31.223926] kasan_set_track+0x25/0x30 [ 31.224295] kasan_save_free_info+0x2b/0x50 [ 31.224687] __kasan_slab_free+0x10a/0x190 [ 31.225079] kmem_cache_free+0x10d/0x4d0 [ 31.225439] rcu_core+0x8c8/0x2860 [ 31.225751] __do_softirq+0x1b7/0x7d4 [ 31.226106] [ 31.226267] Last potentially related work creation: [ 31.226705] kasan_save_stack+0x22/0x50 [ 31.227083] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.227988] remove_vma+0x139/0x170 [ 31.228322] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.228728] do_vmi_munmap+0x1f1/0x2b0 [ 31.229088] __vm_munmap+0x138/0x3a0 [ 31.229429] __x64_sys_munmap+0x59/0x80 [ 31.229804] do_syscall_64+0x3f/0x90 [ 31.230161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.230636] [ 31.230795] The buggy address belongs to the object at ffff88800ef4f2b8 [ 31.230795] which belongs to the cache vm_area_struct of size 168 [ 31.231858] The buggy address is located 88 bytes inside of [ 31.231858] freed 168-byte region [ffff88800ef4f2b8, ffff88800ef4f360) [ 31.232910] [ 31.233064] The buggy address belongs to the physical page: [ 31.233544] page:00000000d5f18d54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef4f [ 31.234747] memcg:ffff88800d160501 [ 31.235307] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.236159] page_type: 0xffffffff() [ 31.236761] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.238025] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d160501 [ 31.239217] page dumped because: kasan: bad access detected [ 31.240086] [ 31.240352] Memory state around the buggy address: [ 31.241141] ffff88800ef4f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.242290] ffff88800ef4f280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.242946] >ffff88800ef4f300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.243548] ^ [ 31.243910] ffff88800ef4f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.244499] ffff88800ef4f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.245131] ================================================================== [ 31.245952] Disabling lock debugging due to kernel taint [ 32.663310] BUG: Bad rss-counter state mm:00000000722f71b2 type:MM_FILEPAGES val:33 [ 32.664260] BUG: Bad rss-counter state mm:00000000722f71b2 type:MM_ANONPAGES val:22 [ 33.117444] BUG: Bad rss-counter state mm:0000000040d3ffb4 type:MM_FILEPAGES val:33 [ 33.118513] BUG: Bad rss-counter state mm:0000000040d3ffb4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2094' (ECDSA) to the list of known hosts. 2023/06/21 08:11:36 fuzzer started 2023/06/21 08:11:36 dialing manager at localhost:36067 2023/06/21 08:11:36 checking machine... 2023/06/21 08:11:36 checking revisions... [ 33.711414] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:11:36 testing simple program... [ 33.755350] cgroup: Unknown subsys name 'net' [ 33.808322] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:11:36 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8180c6a1 RDX=dffffc0000000000 RSI=ffffffff8180c6a2 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8113071f RFL=00000282 [--S----] 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 00007f750a36f700 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=00007ffc7f265b08 CR3=0000000009520000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036333a3131 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303534 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888009478001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888009477b01 RSI=ffff888009477be0 RDI=ffff888009477be0 RBP=ffff888009477760 RSP=ffff888009477690 R8 =ffffffff863b7f62 R9 =ffff888009477748 R10=0000000000038001 R11=000000000008b5b9 R12=ffff888009477768 R13=ffff888009477750 R14=ffff888009477be8 R15=ffff888009477708 RIP=ffffffff8112fbf0 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 00007f190404f900 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=00007ffdbc135000 CR3=000000000daac000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000