syzkaller login: [ 30.765439] BUG: Bad rss-counter state mm:000000009b27d573 type:MM_FILEPAGES val:33 [ 30.767145] BUG: Bad rss-counter state mm:000000009b27d573 type:MM_ANONPAGES val:22 [ 30.934251] ================================================================== [ 30.935164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.936093] Read of size 8 at addr ffff88800e587b38 by task sshd/218 [ 30.936857] [ 30.937076] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.938034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.938998] Call Trace: [ 30.939314] [ 30.939619] dump_stack_lvl+0x91/0xf0 [ 30.940114] print_report+0xcc/0x620 [ 30.940611] ? __virt_addr_valid+0x102/0x340 [ 30.941160] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.941772] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.942386] kasan_report+0xbe/0xf0 [ 30.942859] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.943475] vma_interval_tree_remove+0xc75/0xec0 [ 30.944074] vma_prepare+0xc54/0x11a0 [ 30.944548] __split_vma+0x5af/0x950 [ 30.945038] ? __pfx___split_vma+0x10/0x10 [ 30.945565] ? find_held_lock+0x2c/0x110 [ 30.946080] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.946659] ? lock_is_held_type+0x9f/0x120 [ 30.947204] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.947807] ? mtree_range_walk+0x632/0x900 [ 30.948359] ? mas_walk+0x5c7/0x7c0 [ 30.948853] do_vmi_munmap+0x1f1/0x2b0 [ 30.949347] mmap_region+0x1f9/0x2660 [ 30.949824] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.950329] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.951040] ? __pfx_lock_acquire+0x10/0x10 [ 30.951572] ? __pfx_mmap_region+0x10/0x10 [ 30.952103] ? security_mmap_addr+0x7d/0xa0 [ 30.952638] ? get_unmapped_area+0x1f5/0x3f0 [ 30.953186] do_mmap+0x854/0xf00 [ 30.953622] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.954112] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.954677] ksys_mmap_pgoff+0x3af/0x500 [ 30.955177] do_syscall_64+0x3f/0x90 [ 30.955655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.956299] RIP: 0033:0x7f7912cf4d82 [ 30.956774] 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 [ 30.958886] RSP: 002b:00007ffcb118f088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.959786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7912cf4d82 [ 30.960634] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f791212e000 [ 30.961467] RBP: 00007f791212e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.962316] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b44d0faec0 [ 30.963159] R13: 00007ffcb118f0a0 R14: 00007ffcb118f0d0 R15: 00007ffcb118f430 [ 30.964000] [ 30.964293] [ 30.964506] Allocated by task 211: [ 30.964936] kasan_save_stack+0x22/0x50 [ 30.965437] kasan_set_track+0x25/0x30 [ 30.965927] __kasan_slab_alloc+0x59/0x70 [ 30.966447] kmem_cache_alloc+0x16b/0x370 [ 30.966959] vm_area_dup+0x20/0x160 [ 30.967413] __split_vma+0x170/0x950 [ 30.967889] split_vma+0xc6/0x110 [ 30.968328] mprotect_fixup+0x8d2/0xb30 [ 30.968843] do_mprotect_pkey+0x87e/0xd40 [ 30.969366] __x64_sys_mprotect+0x78/0xc0 [ 30.969884] do_syscall_64+0x3f/0x90 [ 30.970362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.971003] [ 30.971217] Freed by task 211: [ 30.971608] kasan_save_stack+0x22/0x50 [ 30.972109] kasan_set_track+0x25/0x30 [ 30.972618] kasan_save_free_info+0x2b/0x50 [ 30.973158] __kasan_slab_free+0x10a/0x190 [ 30.973687] kmem_cache_free+0x10d/0x4d0 [ 30.974202] rcu_core+0x8c8/0x2860 [ 30.974650] __do_softirq+0x1b7/0x7d4 [ 30.975131] [ 30.975351] Last potentially related work creation: [ 30.975935] kasan_save_stack+0x22/0x50 [ 30.976436] __kasan_record_aux_stack+0x8e/0xa0 [ 30.977017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.977666] remove_vma+0x139/0x170 [ 30.978114] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.978677] do_vmi_munmap+0x1f1/0x2b0 [ 30.979159] __vm_munmap+0x138/0x3a0 [ 30.979622] __x64_sys_munmap+0x59/0x80 [ 30.980124] do_syscall_64+0x3f/0x90 [ 30.980606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.981244] [ 30.981461] Second to last potentially related work creation: [ 30.982138] kasan_save_stack+0x22/0x50 [ 30.982636] __kasan_record_aux_stack+0x8e/0xa0 [ 30.983205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.983846] remove_vma+0x139/0x170 [ 30.984299] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.984858] do_vmi_munmap+0x1f1/0x2b0 [ 30.985340] mmap_region+0x1f9/0x2660 [ 30.985825] do_mmap+0x854/0xf00 [ 30.986251] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.986733] ksys_mmap_pgoff+0x3af/0x500 [ 30.987227] do_syscall_64+0x3f/0x90 [ 30.987696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988332] [ 30.988544] The buggy address belongs to the object at ffff88800e587ae0 [ 30.988544] which belongs to the cache vm_area_struct of size 168 [ 30.990029] The buggy address is located 88 bytes inside of [ 30.990029] freed 168-byte region [ffff88800e587ae0, ffff88800e587b88) [ 30.991420] [ 30.991637] The buggy address belongs to the physical page: [ 30.992291] page:000000000bfec361 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe587 [ 30.993373] memcg:ffff88800c975d01 [ 30.993794] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.994491] page_type: 0xffffffff() [ 30.994940] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.995852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c975d01 [ 30.996775] page dumped because: kasan: bad access detected [ 30.997436] [ 30.997653] Memory state around the buggy address: [ 30.998226] ffff88800e587a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.999086] ffff88800e587a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.999941] >ffff88800e587b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.000801] ^ [ 31.001407] ffff88800e587b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.002258] ffff88800e587c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.003096] ================================================================== [ 31.004110] Disabling lock debugging due to kernel taint [ 33.219222] BUG: Bad rss-counter state mm:00000000d12c8f1a type:MM_FILEPAGES val:33 [ 33.219929] BUG: Bad rss-counter state mm:00000000d12c8f1a type:MM_ANONPAGES val:22 [ 33.668834] BUG: Bad rss-counter state mm:000000008f593557 type:MM_FILEPAGES val:33 [ 33.669714] BUG: Bad rss-counter state mm:000000008f593557 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14282' (ECDSA) to the list of known hosts. 2023/06/20 15:31:51 fuzzer started 2023/06/20 15:31:51 dialing manager at localhost:36067 2023/06/20 15:31:51 checking machine... 2023/06/20 15:31:51 checking revisions... [ 34.425791] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:31:51 testing simple program... [ 34.478054] cgroup: Unknown subsys name 'net' [ 34.516331] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:31:51 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017fe77e8 RCX=0000000000000001 RDX=ffff888017fe77f0 RSI=ffff888017fe7e50 RDI=ffff888017fe77f0 RBP=ffff888017fe7e50 RSP=ffff888017fe7740 R8 =0000000000000001 R9 =ffff888017fe7828 R10=0000000000038001 R11=000000000008a8e5 R12=0000000000000008 R13=ffff888017fe7830 R14=ffff888017fe7e50 R15=ffff888017fe77e8 RIP=ffffffff8113043d 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 00007f1e91018900 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=00007f1e915cf618 CR3=000000000d824000 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=0000000000000000 RCX=0000000000000000 RDX=00000000000101f5 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800a3701a0 RSP=ffff88800a18f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f5 R11=0000000000000128 R12=00000000000101f5 R13=ffff88800a370050 R14=ffff88800a370048 R15=ffff88800a370060 RIP=ffffffff82191d9e RFL=00000093 [--S-A-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 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=00007efc48f8dfd0 CR3=00000000164ca000 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=2030353a31333a3531203032206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a31333a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000