syzkaller login: [ 31.656289] BUG: Bad rss-counter state mm:00000000f23c7389 type:MM_FILEPAGES val:33 [ 31.657379] BUG: Bad rss-counter state mm:00000000f23c7389 type:MM_ANONPAGES val:22 [ 31.774077] ================================================================== [ 31.774715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.775363] Read of size 8 at addr ffff88801668c880 by task sshd/220 [ 31.775894] [ 31.776043] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.776609] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.777341] Call Trace: [ 31.777563] [ 31.777769] dump_stack_lvl+0x91/0xf0 [ 31.778450] print_report+0xcc/0x620 [ 31.778773] ? __virt_addr_valid+0x102/0x340 [ 31.779154] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.779600] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780100] kasan_report+0xbe/0xf0 [ 31.780430] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.780890] vma_interval_tree_remove+0xc75/0xec0 [ 31.781407] vma_prepare+0xc54/0x11a0 [ 31.781738] __split_vma+0x5af/0x950 [ 31.782082] ? __pfx___split_vma+0x10/0x10 [ 31.782455] ? find_held_lock+0x2c/0x110 [ 31.782839] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.783236] ? lock_is_held_type+0x9f/0x120 [ 31.783609] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.784049] ? mtree_range_walk+0x632/0x900 [ 31.784438] ? mas_walk+0x5c7/0x7c0 [ 31.784791] do_vmi_munmap+0x1f1/0x2b0 [ 31.785160] mmap_region+0x1f9/0x2660 [ 31.785576] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.785938] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.786444] ? __pfx_lock_acquire+0x10/0x10 [ 31.786803] ? __pfx_mmap_region+0x10/0x10 [ 31.787213] ? security_mmap_addr+0x7d/0xa0 [ 31.787586] ? get_unmapped_area+0x1f5/0x3f0 [ 31.787992] do_mmap+0x854/0xf00 [ 31.788294] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.788634] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.789064] ksys_mmap_pgoff+0x3af/0x500 [ 31.789472] do_syscall_64+0x3f/0x90 [ 31.789809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.790271] RIP: 0033:0x7faf90ee0d82 [ 31.790587] 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 [ 31.792139] RSP: 002b:00007fff85e3bae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.792768] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf90ee0d82 [ 31.793447] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf9031a000 [ 31.794065] RBP: 00007faf9031a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.794643] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bca4e0ec0 [ 31.795261] R13: 00007fff85e3bb00 R14: 00007fff85e3bb30 R15: 00007fff85e3be90 [ 31.795937] [ 31.796149] [ 31.796300] Allocated by task 213: [ 31.796590] kasan_save_stack+0x22/0x50 [ 31.796984] kasan_set_track+0x25/0x30 [ 31.797409] __kasan_slab_alloc+0x59/0x70 [ 31.797777] kmem_cache_alloc+0x16b/0x370 [ 31.798149] vm_area_dup+0x20/0x160 [ 31.798475] __split_vma+0x170/0x950 [ 31.798802] split_vma+0xc6/0x110 [ 31.799112] mprotect_fixup+0x8d2/0xb30 [ 31.799462] do_mprotect_pkey+0x87e/0xd40 [ 31.799829] __x64_sys_mprotect+0x78/0xc0 [ 31.800227] do_syscall_64+0x3f/0x90 [ 31.800561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.801033] [ 31.801178] Freed by task 213: [ 31.801486] kasan_save_stack+0x22/0x50 [ 31.801824] kasan_set_track+0x25/0x30 [ 31.802226] kasan_save_free_info+0x2b/0x50 [ 31.802609] __kasan_slab_free+0x10a/0x190 [ 31.803010] kmem_cache_free+0x10d/0x4d0 [ 31.803352] rcu_core+0x8c8/0x2860 [ 31.803655] __do_softirq+0x1b7/0x7d4 [ 31.804004] [ 31.804173] Last potentially related work creation: [ 31.804608] kasan_save_stack+0x22/0x50 [ 31.804951] __kasan_record_aux_stack+0x8e/0xa0 [ 31.805386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.805826] remove_vma+0x139/0x170 [ 31.806148] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.806527] do_vmi_munmap+0x1f1/0x2b0 [ 31.806876] __vm_munmap+0x138/0x3a0 [ 31.807229] __x64_sys_munmap+0x59/0x80 [ 31.807563] do_syscall_64+0x3f/0x90 [ 31.807874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.808297] [ 31.808442] The buggy address belongs to the object at ffff88801668c828 [ 31.808442] which belongs to the cache vm_area_struct of size 168 [ 31.809522] The buggy address is located 88 bytes inside of [ 31.809522] freed 168-byte region [ffff88801668c828, ffff88801668c8d0) [ 31.810474] [ 31.810622] The buggy address belongs to the physical page: [ 31.811105] page:00000000b37f54aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1668c [ 31.811833] memcg:ffff888018ed9b01 [ 31.812143] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.812592] page_type: 0xffffffff() [ 31.812902] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.813607] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ed9b01 [ 31.814238] page dumped because: kasan: bad access detected [ 31.814680] [ 31.814829] Memory state around the buggy address: [ 31.815228] ffff88801668c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.815812] ffff88801668c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.816379] >ffff88801668c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.816941] ^ [ 31.817252] ffff88801668c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.817835] ffff88801668c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.818429] ================================================================== [ 31.819101] Disabling lock debugging due to kernel taint [ 33.282205] BUG: Bad rss-counter state mm:00000000b8d47d6d type:MM_FILEPAGES val:33 [ 33.282950] BUG: Bad rss-counter state mm:00000000b8d47d6d type:MM_ANONPAGES val:22 [ 33.648218] BUG: Bad rss-counter state mm:00000000826676fc type:MM_FILEPAGES val:33 [ 33.648901] BUG: Bad rss-counter state mm:00000000826676fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7765' (ECDSA) to the list of known hosts. 2023/06/21 09:04:42 fuzzer started 2023/06/21 09:04:42 dialing manager at localhost:36067 2023/06/21 09:04:42 checking machine... 2023/06/21 09:04:42 checking revisions... [ 34.214209] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:04:42 testing simple program... [ 34.246859] cgroup: Unknown subsys name 'net' [ 34.283958] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:04:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180c6a2 RCX=ffffffff860d8201 RDX=1ffff11001fb3e66 RSI=0000000000000000 RDI=ffffffff8180c6a2 RBP=ffffffff8180c6a2 RSP=ffff88800fd9f288 R8 =ffffffff860d825a R9 =ffff88800fd9f318 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000001 R13=0000000000000000 R14=ffff8880164c51c0 R15=00000000000928c0 RIP=ffffffff811fc772 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 00007f5b18143900 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=00007f5b186fa618 CR3=000000000e43a000 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=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138f52 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138f56 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e30 R15=ffff88806cf09a98 RIP=ffffffff81131153 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 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=00007f0aef601380 CR3=000000000c604000 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=4f86d93ca3615fbc964cabc5501c0b1d XMM02=000000000011a9d8ec2efd57dc4c00df XMM03=0000000000121f18b9b95871e39c4cc0 XMM04=e34a0a82de751f9200000000000ae988 XMM05=19e9129bd510f2350000000000131d38 XMM06=4fda316b135da52b0000000000131bc0 XMM07=e042d86d42eb936e0000000000122198 XMM08=b9b95871e39c4cc0000000000011aa38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000