syzkaller login: [ 26.340193] BUG: Bad rss-counter state mm:00000000c2ed92c2 type:MM_FILEPAGES val:33 [ 26.341197] BUG: Bad rss-counter state mm:00000000c2ed92c2 type:MM_ANONPAGES val:22 [ 26.501368] ================================================================== [ 26.502326] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.503258] Read of size 8 at addr ffff88800d926df0 by task sshd/219 [ 26.504056] [ 26.504423] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.505411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.506435] Call Trace: [ 26.506765] [ 26.507047] dump_stack_lvl+0x91/0xf0 [ 26.507538] print_report+0xcc/0x620 [ 26.508132] ? __virt_addr_valid+0x102/0x340 [ 26.508706] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.509317] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.509960] kasan_report+0xbe/0xf0 [ 26.510448] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.511080] vma_interval_tree_remove+0xc75/0xec0 [ 26.511693] vma_prepare+0xc54/0x11a0 [ 26.512168] __split_vma+0x5af/0x950 [ 26.512659] ? __pfx___split_vma+0x10/0x10 [ 26.513188] ? find_held_lock+0x2c/0x110 [ 26.513724] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.514287] ? lock_is_held_type+0x9f/0x120 [ 26.514856] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.515466] ? mtree_range_walk+0x632/0x900 [ 26.516036] ? mas_walk+0x5c7/0x7c0 [ 26.516514] do_vmi_munmap+0x1f1/0x2b0 [ 26.517037] mmap_region+0x1f9/0x2660 [ 26.517518] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.518043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.518801] ? __pfx_lock_acquire+0x10/0x10 [ 26.519338] ? __pfx_mmap_region+0x10/0x10 [ 26.519879] ? security_mmap_addr+0x7d/0xa0 [ 26.520415] ? get_unmapped_area+0x1f5/0x3f0 [ 26.520989] do_mmap+0x854/0xf00 [ 26.521436] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.521947] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.522524] ksys_mmap_pgoff+0x3af/0x500 [ 26.523044] do_syscall_64+0x3f/0x90 [ 26.523512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.524179] RIP: 0033:0x7f7752ed8d82 [ 26.524658] 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 [ 26.526810] RSP: 002b:00007ffdfb93c378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.527726] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7752ed8d82 [ 26.528565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7752312000 [ 26.529421] RBP: 00007f7752312000 R08: 0000000000000009 R09: 0000000000001000 [ 26.530279] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6e3b5dd90 [ 26.531143] R13: 00007ffdfb93c390 R14: 00007ffdfb93c3c0 R15: 00007ffdfb93c720 [ 26.532005] [ 26.532298] [ 26.532517] Allocated by task 212: [ 26.532963] kasan_save_stack+0x22/0x50 [ 26.533466] kasan_set_track+0x25/0x30 [ 26.533973] __kasan_slab_alloc+0x59/0x70 [ 26.534519] kmem_cache_alloc+0x16b/0x370 [ 26.535043] vm_area_dup+0x20/0x160 [ 26.535502] __split_vma+0x170/0x950 [ 26.535980] split_vma+0xc6/0x110 [ 26.536416] mprotect_fixup+0x8d2/0xb30 [ 26.536937] do_mprotect_pkey+0x87e/0xd40 [ 26.537453] __x64_sys_mprotect+0x78/0xc0 [ 26.537985] do_syscall_64+0x3f/0x90 [ 26.538487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.539128] [ 26.539348] Freed by task 212: [ 26.539750] kasan_save_stack+0x22/0x50 [ 26.540256] kasan_set_track+0x25/0x30 [ 26.540772] kasan_save_free_info+0x2b/0x50 [ 26.541298] __kasan_slab_free+0x10a/0x190 [ 26.541852] kmem_cache_free+0x10d/0x4d0 [ 26.542368] rcu_core+0x8c8/0x2860 [ 26.542828] __do_softirq+0x1b7/0x7d4 [ 26.543304] [ 26.543519] Last potentially related work creation: [ 26.544107] kasan_save_stack+0x22/0x50 [ 26.544641] __kasan_record_aux_stack+0x8e/0xa0 [ 26.545393] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.546050] remove_vma+0x139/0x170 [ 26.546517] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.547077] do_vmi_munmap+0x1f1/0x2b0 [ 26.547563] __vm_munmap+0x138/0x3a0 [ 26.548036] __x64_sys_munmap+0x59/0x80 [ 26.548529] do_syscall_64+0x3f/0x90 [ 26.549029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.549679] [ 26.549898] The buggy address belongs to the object at ffff88800d926d98 [ 26.549898] which belongs to the cache vm_area_struct of size 168 [ 26.551374] The buggy address is located 88 bytes inside of [ 26.551374] freed 168-byte region [ffff88800d926d98, ffff88800d926e40) [ 26.552803] [ 26.553024] The buggy address belongs to the physical page: [ 26.553699] page:000000009a98a520 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd926 [ 26.554807] memcg:ffff888018264701 [ 26.555240] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.555891] page_type: 0xffffffff() [ 26.556346] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.557288] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018264701 [ 26.558209] page dumped because: kasan: bad access detected [ 26.558904] [ 26.559119] Memory state around the buggy address: [ 26.559704] ffff88800d926c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 26.560567] ffff88800d926d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 26.561443] >ffff88800d926d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 26.562336] ^ [ 26.563171] ffff88800d926e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.564036] ffff88800d926e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.564913] ================================================================== [ 26.566190] Disabling lock debugging due to kernel taint [ 28.627776] BUG: Bad rss-counter state mm:000000004d88eb52 type:MM_FILEPAGES val:33 [ 28.628510] BUG: Bad rss-counter state mm:000000004d88eb52 type:MM_ANONPAGES val:22 [ 29.064938] BUG: Bad rss-counter state mm:000000004c9a023c type:MM_FILEPAGES val:33 [ 29.065976] BUG: Bad rss-counter state mm:000000004c9a023c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26150' (ECDSA) to the list of known hosts. 2023/06/20 03:27:15 fuzzer started 2023/06/20 03:27:15 dialing manager at localhost:44161 2023/06/20 03:27:15 checking machine... 2023/06/20 03:27:15 checking revisions... [ 29.786857] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:27:15 testing simple program... [ 29.838988] cgroup: Unknown subsys name 'net' [ 29.881416] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:27:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fe5ec7e1fef RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800f007620 RSP=ffff88800f0075a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800f007690 R13=0000000000000000 R14=ffff888016ba1b40 R15=0000000000000000 RIP=ffffffff811fc87d RFL=00000296 [--S-AP-] 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 00007fe5eb99e700 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=00007f427bc40ed0 CR3=000000000c5ba000 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=2034313a37323a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a37323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000034 RCX=ffffffff8372634d RDX=ffff888014663680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000035 RSP=ffff88801aa2f7b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96c80 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c01fc RFL=00000246 [---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 00007fd59ddac900 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=00007fd59e363618 CR3=000000000996c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000