syzkaller login: [ 30.044893] BUG: Bad rss-counter state mm:00000000f369c021 type:MM_FILEPAGES val:33 [ 30.046300] BUG: Bad rss-counter state mm:00000000f369c021 type:MM_ANONPAGES val:22 [ 30.221148] ================================================================== [ 30.222218] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.223364] Read of size 8 at addr ffff888016e79880 by task sshd/221 [ 30.224233] [ 30.224480] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.225477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.226584] Call Trace: [ 30.226939] [ 30.227260] dump_stack_lvl+0x91/0xf0 [ 30.227830] print_report+0xcc/0x620 [ 30.228396] ? __virt_addr_valid+0x102/0x340 [ 30.229033] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.229756] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.230477] kasan_report+0xbe/0xf0 [ 30.231010] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.231721] vma_interval_tree_remove+0xc75/0xec0 [ 30.232427] vma_prepare+0xc54/0x11a0 [ 30.232989] __split_vma+0x5af/0x950 [ 30.233542] ? __pfx___split_vma+0x10/0x10 [ 30.234179] ? find_held_lock+0x2c/0x110 [ 30.234796] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.235459] ? lock_is_held_type+0x9f/0x120 [ 30.236098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.236794] ? mtree_range_walk+0x632/0x900 [ 30.237441] ? mas_walk+0x5c7/0x7c0 [ 30.238000] do_vmi_munmap+0x1f1/0x2b0 [ 30.238586] mmap_region+0x1f9/0x2660 [ 30.239149] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.239741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.240579] ? __pfx_lock_acquire+0x10/0x10 [ 30.241197] ? __pfx_mmap_region+0x10/0x10 [ 30.241816] ? security_mmap_addr+0x7d/0xa0 [ 30.242452] ? get_unmapped_area+0x1f5/0x3f0 [ 30.243085] do_mmap+0x854/0xf00 [ 30.243599] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.244172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.244832] ksys_mmap_pgoff+0x3af/0x500 [ 30.245428] do_syscall_64+0x3f/0x90 [ 30.245988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.246772] RIP: 0033:0x7f94cea94d82 [ 30.247305] 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 [ 30.249783] RSP: 002b:00007fff3885e328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.250845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94cea94d82 [ 30.251834] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94cdece000 [ 30.252812] RBP: 00007f94cdece000 R08: 0000000000000009 R09: 0000000000001000 [ 30.253801] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b82133ec0 [ 30.254791] R13: 00007fff3885e340 R14: 00007fff3885e370 R15: 00007fff3885e6d0 [ 30.255792] [ 30.256132] [ 30.256381] Allocated by task 214: [ 30.256873] kasan_save_stack+0x22/0x50 [ 30.257463] kasan_set_track+0x25/0x30 [ 30.258038] __kasan_slab_alloc+0x59/0x70 [ 30.258673] kmem_cache_alloc+0x16b/0x370 [ 30.259276] vm_area_dup+0x20/0x160 [ 30.259812] __split_vma+0x170/0x950 [ 30.260365] split_vma+0xc6/0x110 [ 30.260878] mprotect_fixup+0x8d2/0xb30 [ 30.261461] do_mprotect_pkey+0x87e/0xd40 [ 30.262066] __x64_sys_mprotect+0x78/0xc0 [ 30.262682] do_syscall_64+0x3f/0x90 [ 30.263238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.263983] [ 30.264233] Freed by task 214: [ 30.264684] kasan_save_stack+0x22/0x50 [ 30.265266] kasan_set_track+0x25/0x30 [ 30.265840] kasan_save_free_info+0x2b/0x50 [ 30.266465] __kasan_slab_free+0x10a/0x190 [ 30.267088] kmem_cache_free+0x10d/0x4d0 [ 30.267677] rcu_core+0x8c8/0x2860 [ 30.268188] __do_softirq+0x1b7/0x7d4 [ 30.268751] [ 30.269000] Last potentially related work creation: [ 30.269678] kasan_save_stack+0x22/0x50 [ 30.270283] __kasan_record_aux_stack+0x8e/0xa0 [ 30.270949] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.271697] remove_vma+0x139/0x170 [ 30.272227] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.272875] do_vmi_munmap+0x1f1/0x2b0 [ 30.273440] __vm_munmap+0x138/0x3a0 [ 30.273979] __x64_sys_munmap+0x59/0x80 [ 30.274565] do_syscall_64+0x3f/0x90 [ 30.275117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.275859] [ 30.276112] The buggy address belongs to the object at ffff888016e79828 [ 30.276112] which belongs to the cache vm_area_struct of size 168 [ 30.277829] The buggy address is located 88 bytes inside of [ 30.277829] freed 168-byte region [ffff888016e79828, ffff888016e798d0) [ 30.279469] [ 30.279721] The buggy address belongs to the physical page: [ 30.280489] page:000000005cd71f40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e79 [ 30.281767] memcg:ffff888016e7d301 [ 30.282280] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.283033] page_type: 0xffffffff() [ 30.283558] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.284624] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e7d301 [ 30.285685] page dumped because: kasan: bad access detected [ 30.286458] [ 30.286708] Memory state around the buggy address: [ 30.287381] ffff888016e79780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.288380] ffff888016e79800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.289387] >ffff888016e79880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.290408] ^ [ 30.290890] ffff888016e79900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.291883] ffff888016e79980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.292867] ================================================================== [ 30.294082] Disabling lock debugging due to kernel taint [ 32.264433] BUG: Bad rss-counter state mm:0000000024e9cca1 type:MM_FILEPAGES val:33 [ 32.265435] BUG: Bad rss-counter state mm:0000000024e9cca1 type:MM_ANONPAGES val:22 [ 32.746442] BUG: Bad rss-counter state mm:00000000d149310d type:MM_FILEPAGES val:33 [ 32.747448] BUG: Bad rss-counter state mm:00000000d149310d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18149' (ECDSA) to the list of known hosts. 2023/06/21 06:27:30 fuzzer started 2023/06/21 06:27:31 dialing manager at localhost:36067 2023/06/21 06:27:31 checking machine... 2023/06/21 06:27:31 checking revisions... [ 33.354535] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:27:31 testing simple program... [ 33.399549] cgroup: Unknown subsys name 'net' [ 33.451692] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:27:30 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019fb3680 RCX=ffffffff812d86ea RDX=1ffff110033f66d3 RSI=0000000000000132 RDI=ffff888019fb3698 RBP=ffffffff85265479 RSP=ffff8880167bfb80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000132 R13=0000000000000000 R14=0000000000000001 R15=ffffffff8184725c RIP=ffffffff8122ea14 RFL=00000212 [----A--] 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 00007f725d1f4900 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=00007f725d7ab618 CR3=00000000169f0000 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=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 info registers vcpu 1 RAX=00000000d6114497 RBX=000000009e9df11d RCX=ffff88806cf09bc0 RDX=0000000000000006 RSI=0000000000000006 RDI=00000000913d0908 RBP=0000000000000000 RSP=ffff88806cf09b40 R8 =00000000d6114497 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf09ba8 R15=0000000000000006 RIP=ffffffff822704a0 RFL=00000a97 [-OS-APC] 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 00007f5ec9b9a900 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=00007f5ec8f91ef0 CR3=0000000009644000 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=40fe9063c51114972f4d1447ebc36eba XMM02=0000000000119e10eff9b2d0a8fce9cb XMM03=0000000000119ee02c67c8bc2e329bc3 XMM04=940129c46e86360100000000000ae988 XMM05=64defdefea6f12180000000000132240 XMM06=c291bd5c70af25b90000000000131030 XMM07=fb795ef6d65770560000000000121018 XMM08=2c67c8bc2e329bc30000000000119e80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000