syzkaller login: [ 30.360142] BUG: Bad rss-counter state mm:0000000029551c8e type:MM_FILEPAGES val:33 [ 30.361234] BUG: Bad rss-counter state mm:0000000029551c8e type:MM_ANONPAGES val:22 [ 30.531608] ================================================================== [ 30.532505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.533479] Read of size 8 at addr ffff88800e2ef5c8 by task sshd/220 [ 30.534232] [ 30.534451] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.535466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.536439] Call Trace: [ 30.536787] [ 30.537074] dump_stack_lvl+0x91/0xf0 [ 30.537594] print_report+0xcc/0x620 [ 30.538076] ? __virt_addr_valid+0x102/0x340 [ 30.538625] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539238] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.539851] kasan_report+0xbe/0xf0 [ 30.540324] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.540949] vma_interval_tree_remove+0xc75/0xec0 [ 30.541554] vma_prepare+0xc54/0x11a0 [ 30.542031] __split_vma+0x5af/0x950 [ 30.542498] ? __pfx___split_vma+0x10/0x10 [ 30.543029] ? find_held_lock+0x2c/0x110 [ 30.543548] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.544107] ? lock_is_held_type+0x9f/0x120 [ 30.544678] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.545280] ? mtree_range_walk+0x632/0x900 [ 30.545832] ? mas_walk+0x5c7/0x7c0 [ 30.546313] do_vmi_munmap+0x1f1/0x2b0 [ 30.546801] mmap_region+0x1f9/0x2660 [ 30.547284] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.547792] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.548500] ? __pfx_lock_acquire+0x10/0x10 [ 30.549039] ? __pfx_mmap_region+0x10/0x10 [ 30.549567] ? security_mmap_addr+0x7d/0xa0 [ 30.550093] ? get_unmapped_area+0x1f5/0x3f0 [ 30.550642] do_mmap+0x854/0xf00 [ 30.551081] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.551575] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.552134] ksys_mmap_pgoff+0x3af/0x500 [ 30.552653] do_syscall_64+0x3f/0x90 [ 30.553133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.553787] RIP: 0033:0x7f73cf823d82 [ 30.554244] 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 [ 30.556365] RSP: 002b:00007ffd8ca5c748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.557281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73cf823d82 [ 30.558139] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73cec5d000 [ 30.558998] RBP: 00007f73cec5d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.559837] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602560a7ec0 [ 30.560690] R13: 00007ffd8ca5c760 R14: 00007ffd8ca5c790 R15: 00007ffd8ca5caf0 [ 30.561543] [ 30.561839] [ 30.562052] Allocated by task 213: [ 30.562480] kasan_save_stack+0x22/0x50 [ 30.562982] kasan_set_track+0x25/0x30 [ 30.563473] __kasan_slab_alloc+0x59/0x70 [ 30.563997] kmem_cache_alloc+0x16b/0x370 [ 30.564510] vm_area_dup+0x20/0x160 [ 30.564988] __split_vma+0x170/0x950 [ 30.565447] split_vma+0xc6/0x110 [ 30.565891] mprotect_fixup+0x8d2/0xb30 [ 30.566387] do_mprotect_pkey+0x87e/0xd40 [ 30.566904] __x64_sys_mprotect+0x78/0xc0 [ 30.567421] do_syscall_64+0x3f/0x90 [ 30.567898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.568538] [ 30.568762] Freed by task 213: [ 30.569150] kasan_save_stack+0x22/0x50 [ 30.569652] kasan_set_track+0x25/0x30 [ 30.570148] kasan_save_free_info+0x2b/0x50 [ 30.570674] __kasan_slab_free+0x10a/0x190 [ 30.571204] kmem_cache_free+0x10d/0x4d0 [ 30.571711] rcu_core+0x8c8/0x2860 [ 30.572149] __do_softirq+0x1b7/0x7d4 [ 30.572628] [ 30.572846] Last potentially related work creation: [ 30.573429] kasan_save_stack+0x22/0x50 [ 30.573930] __kasan_record_aux_stack+0x8e/0xa0 [ 30.574503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.575151] remove_vma+0x139/0x170 [ 30.575599] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.576151] do_vmi_munmap+0x1f1/0x2b0 [ 30.576648] __vm_munmap+0x138/0x3a0 [ 30.577117] __x64_sys_munmap+0x59/0x80 [ 30.577609] do_syscall_64+0x3f/0x90 [ 30.578080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.578717] [ 30.578932] Second to last potentially related work creation: [ 30.579613] kasan_save_stack+0x22/0x50 [ 30.580117] __kasan_record_aux_stack+0x8e/0xa0 [ 30.580694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.581331] remove_vma+0x139/0x170 [ 30.581781] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.582329] do_vmi_munmap+0x1f1/0x2b0 [ 30.582810] mmap_region+0x1f9/0x2660 [ 30.583284] do_mmap+0x854/0xf00 [ 30.583717] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.584204] ksys_mmap_pgoff+0x3af/0x500 [ 30.584710] do_syscall_64+0x3f/0x90 [ 30.585182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.585819] [ 30.586033] The buggy address belongs to the object at ffff88800e2ef570 [ 30.586033] which belongs to the cache vm_area_struct of size 168 [ 30.587487] The buggy address is located 88 bytes inside of [ 30.587487] freed 168-byte region [ffff88800e2ef570, ffff88800e2ef618) [ 30.588895] [ 30.589109] The buggy address belongs to the physical page: [ 30.589760] page:0000000067d18650 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2ef [ 30.590844] memcg:ffff88800eb95201 [ 30.591264] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.591963] page_type: 0xffffffff() [ 30.592408] raw: 0100000000000200 ffff8880087a0c80 ffffea00006137c0 dead000000000007 [ 30.593330] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb95201 [ 30.594236] page dumped because: kasan: bad access detected [ 30.594890] [ 30.595105] Memory state around the buggy address: [ 30.595681] ffff88800e2ef480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.596524] ffff88800e2ef500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.597395] >ffff88800e2ef580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.598246] ^ [ 30.598910] ffff88800e2ef600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.599760] ffff88800e2ef680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.600603] ================================================================== [ 30.601765] Disabling lock debugging due to kernel taint [ 33.043053] BUG: Bad rss-counter state mm:00000000b77e8910 type:MM_FILEPAGES val:33 [ 33.044437] BUG: Bad rss-counter state mm:00000000b77e8910 type:MM_ANONPAGES val:22 [ 33.507773] BUG: Bad rss-counter state mm:00000000960bac28 type:MM_FILEPAGES val:33 [ 33.508797] BUG: Bad rss-counter state mm:00000000960bac28 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41602' (ECDSA) to the list of known hosts. 2023/06/20 22:30:09 fuzzer started 2023/06/20 22:30:10 dialing manager at localhost:36067 2023/06/20 22:30:10 checking machine... 2023/06/20 22:30:10 checking revisions... [ 34.313773] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:30:10 testing simple program... [ 34.365902] cgroup: Unknown subsys name 'net' [ 34.430660] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:30:09 Registers: info registers vcpu 0 RAX=ffffffff8366b8df RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001988e8e RSI=ffffffff8366b8df RDI=ffff88800cc474e0 RBP=ffff88800cc474b0 RSP=ffff88800cc47410 R8 =0000000000000001 R9 =ffff88800cc47458 R10=0000000000038001 R11=0000000000020cbd R12=ffff88800cc474e0 R13=0000000000000000 R14=ffff888015f83680 R15=0000000000000000 RIP=ffffffff84538440 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 00007f2345826900 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=00007f682a774000 CR3=0000000010360000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffffd73f000 CR3=0000000010360000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000