syzkaller login: [ 28.839085] BUG: Bad rss-counter state mm:00000000531d652e type:MM_FILEPAGES val:33 [ 28.840528] BUG: Bad rss-counter state mm:00000000531d652e type:MM_ANONPAGES val:22 [ 28.880067] ================================================================== [ 28.880980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.881916] Read of size 8 at addr ffff8880101eec20 by task sshd/220 [ 28.882794] [ 28.883010] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.883899] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.884886] Call Trace: [ 28.885209] [ 28.885491] dump_stack_lvl+0x91/0xf0 [ 28.885976] print_report+0xcc/0x620 [ 28.886458] ? __virt_addr_valid+0x102/0x340 [ 28.887005] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.887648] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.888266] kasan_report+0xbe/0xf0 [ 28.888748] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.889363] vma_interval_tree_remove+0xc75/0xec0 [ 28.889966] vma_prepare+0xc54/0x11a0 [ 28.890448] __split_vma+0x5af/0x950 [ 28.890928] ? __pfx___split_vma+0x10/0x10 [ 28.891481] ? find_held_lock+0x2c/0x110 [ 28.892008] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.892568] ? lock_is_held_type+0x9f/0x120 [ 28.893112] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.893716] ? mtree_range_walk+0x632/0x900 [ 28.894267] ? mas_walk+0x5c7/0x7c0 [ 28.894746] do_vmi_munmap+0x1f1/0x2b0 [ 28.895262] mmap_region+0x1f9/0x2660 [ 28.895738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.896252] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.896957] ? __pfx_lock_acquire+0x10/0x10 [ 28.897493] ? __pfx_mmap_region+0x10/0x10 [ 28.898017] ? security_mmap_addr+0x7d/0xa0 [ 28.898543] ? get_unmapped_area+0x1f5/0x3f0 [ 28.899102] do_mmap+0x854/0xf00 [ 28.899538] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.900026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.900589] ksys_mmap_pgoff+0x3af/0x500 [ 28.901098] do_syscall_64+0x3f/0x90 [ 28.901574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.902215] RIP: 0033:0x7fc6ebf08d82 [ 28.902674] 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 [ 28.904830] RSP: 002b:00007ffde9ab4a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.905731] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc6ebf08d82 [ 28.906573] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc6eb342000 [ 28.907424] RBP: 00007fc6eb342000 R08: 0000000000000009 R09: 0000000000001000 [ 28.908267] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d52af1ab20 [ 28.909107] R13: 00007ffde9ab4a80 R14: 00007ffde9ab4ab0 R15: 00007ffde9ab4e10 [ 28.909960] [ 28.910251] [ 28.910468] Allocated by task 212: [ 28.910893] kasan_save_stack+0x22/0x50 [ 28.911406] kasan_set_track+0x25/0x30 [ 28.911904] __kasan_slab_alloc+0x59/0x70 [ 28.912429] kmem_cache_alloc+0x16b/0x370 [ 28.912940] vm_area_dup+0x20/0x160 [ 28.913393] __split_vma+0x170/0x950 [ 28.913855] split_vma+0xc6/0x110 [ 28.914291] mprotect_fixup+0x8d2/0xb30 [ 28.914793] do_mprotect_pkey+0x87e/0xd40 [ 28.915335] __x64_sys_mprotect+0x78/0xc0 [ 28.915857] do_syscall_64+0x3f/0x90 [ 28.916329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.916968] [ 28.917185] Freed by task 19: [ 28.917567] kasan_save_stack+0x22/0x50 [ 28.918067] kasan_set_track+0x25/0x30 [ 28.918556] kasan_save_free_info+0x2b/0x50 [ 28.919092] __kasan_slab_free+0x10a/0x190 [ 28.919624] kmem_cache_free+0x10d/0x4d0 [ 28.920130] rcu_core+0x8c8/0x2860 [ 28.920587] __do_softirq+0x1b7/0x7d4 [ 28.921083] [ 28.921316] Last potentially related work creation: [ 28.921872] kasan_save_stack+0x22/0x50 [ 28.922380] __kasan_record_aux_stack+0x8e/0xa0 [ 28.922939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.923569] remove_vma+0x139/0x170 [ 28.924001] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.924536] do_vmi_munmap+0x1f1/0x2b0 [ 28.924995] __vm_munmap+0x138/0x3a0 [ 28.925441] __x64_sys_munmap+0x59/0x80 [ 28.925912] do_syscall_64+0x3f/0x90 [ 28.926367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.926979] [ 28.927198] Second to last potentially related work creation: [ 28.927842] kasan_save_stack+0x22/0x50 [ 28.928319] __kasan_record_aux_stack+0x8e/0xa0 [ 28.928865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.929480] remove_vma+0x139/0x170 [ 28.929906] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.930431] do_vmi_munmap+0x1f1/0x2b0 [ 28.930907] mmap_region+0x1f9/0x2660 [ 28.931396] do_mmap+0x854/0xf00 [ 28.931827] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.932317] ksys_mmap_pgoff+0x3af/0x500 [ 28.932816] do_syscall_64+0x3f/0x90 [ 28.933291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.933927] [ 28.934143] The buggy address belongs to the object at ffff8880101eebc8 [ 28.934143] which belongs to the cache vm_area_struct of size 168 [ 28.935614] The buggy address is located 88 bytes inside of [ 28.935614] freed 168-byte region [ffff8880101eebc8, ffff8880101eec70) [ 28.937018] [ 28.937228] The buggy address belongs to the physical page: [ 28.937883] page:00000000a38161d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x101ee [ 28.938962] memcg:ffff88800cbc4b01 [ 28.939396] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.940031] page_type: 0xffffffff() [ 28.940471] raw: 0100000000000200 ffff8880087a0c80 ffffea00003847c0 dead000000000002 [ 28.941386] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbc4b01 [ 28.942285] page dumped because: kasan: bad access detected [ 28.942934] [ 28.943168] Memory state around the buggy address: [ 28.943736] ffff8880101eeb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.944574] ffff8880101eeb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 28.945414] >ffff8880101eec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.946246] ^ [ 28.946772] ffff8880101eec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 28.947629] ffff8880101eed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 28.948475] ================================================================== [ 28.949440] Disabling lock debugging due to kernel taint [ 30.773283] BUG: Bad rss-counter state mm:00000000a5a70205 type:MM_FILEPAGES val:33 [ 30.774444] BUG: Bad rss-counter state mm:00000000a5a70205 type:MM_ANONPAGES val:22 [ 31.119051] BUG: Bad rss-counter state mm:000000009516b45f type:MM_FILEPAGES val:33 [ 31.120026] BUG: Bad rss-counter state mm:000000009516b45f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20797' (ECDSA) to the list of known hosts. 2023/06/20 23:08:44 fuzzer started 2023/06/20 23:08:45 dialing manager at localhost:36067 2023/06/20 23:08:45 checking machine... 2023/06/20 23:08:45 checking revisions... [ 31.806083] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:08:45 testing simple program... [ 31.851127] cgroup: Unknown subsys name 'net' [ 31.903851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:08:44 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85fa8e80 RCX=ffffffff836827d8 RDX=0000000000000000 RSI=ffffffff863b941c RDI=ffffffff85fa8e7c RBP=ffffffff85fa8e80 RSP=ffff88800edb7490 R8 =ffffffff863b941c R9 =ffff88800edb7588 R10=0000000000038001 R11=000000000008b92e R12=ffffffff85fa8e80 R13=ffffffff85fa8e7c R14=ffffffff85fa8e7c R15=dffffc0000000000 RIP=ffffffff8112fc90 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 00007f15d1fd2900 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=00007ffcf71cb000 CR3=000000000edf2000 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=ffff888008c04400 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=00007f47aa292870 CR3=0000000014582000 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=7919c54323471f9e7d4936636e43e0b9 XMM02=2c67c8bc2e329bc3000000000011aa60 XMM03=fb795ef6d657705600000000001217b0 XMM04=b858e2c6a6a32c5e00000000000ae988 XMM05=19e9129bd510f23500000000001330e8 XMM06=ee5588b0e57e5d270000000000131f50 XMM07=e042d86d42eb936e0000000000121a88 XMM08=825c6c913638b77d000000000011aac0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000