syzkaller login: [ 30.470697] BUG: Bad rss-counter state mm:000000006405a0c7 type:MM_FILEPAGES val:33 [ 30.471592] BUG: Bad rss-counter state mm:000000006405a0c7 type:MM_ANONPAGES val:22 [ 30.585869] ================================================================== [ 30.586500] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.587109] Read of size 8 at addr ffff888009095df0 by task sshd/221 [ 30.587593] [ 30.587731] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.588290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.588928] Call Trace: [ 30.589145] [ 30.589364] dump_stack_lvl+0x91/0xf0 [ 30.589700] print_report+0xcc/0x620 [ 30.590028] ? __virt_addr_valid+0x102/0x340 [ 30.590591] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591008] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.591411] kasan_report+0xbe/0xf0 [ 30.591719] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.592116] vma_interval_tree_remove+0xc75/0xec0 [ 30.592557] vma_prepare+0xc54/0x11a0 [ 30.592891] __split_vma+0x5af/0x950 [ 30.593221] ? __pfx___split_vma+0x10/0x10 [ 30.593606] ? find_held_lock+0x2c/0x110 [ 30.593970] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.594352] ? lock_is_held_type+0x9f/0x120 [ 30.594711] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.595099] ? mtree_range_walk+0x632/0x900 [ 30.595472] ? mas_walk+0x5c7/0x7c0 [ 30.595802] do_vmi_munmap+0x1f1/0x2b0 [ 30.596143] mmap_region+0x1f9/0x2660 [ 30.596466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.596813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.597323] ? __pfx_lock_acquire+0x10/0x10 [ 30.597717] ? __pfx_mmap_region+0x10/0x10 [ 30.598082] ? security_mmap_addr+0x7d/0xa0 [ 30.598440] ? get_unmapped_area+0x1f5/0x3f0 [ 30.598826] do_mmap+0x854/0xf00 [ 30.599127] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.599466] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.599904] ksys_mmap_pgoff+0x3af/0x500 [ 30.600255] do_syscall_64+0x3f/0x90 [ 30.600589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.601016] RIP: 0033:0x7f25b7d11d82 [ 30.601377] 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 [ 30.602748] RSP: 002b:00007ffedd0e0fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.603428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25b7d11d82 [ 30.604002] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25b714b000 [ 30.604551] RBP: 00007f25b714b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.605126] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e3d102ec0 [ 30.605740] R13: 00007ffedd0e0ff0 R14: 00007ffedd0e1020 R15: 00007ffedd0e1380 [ 30.606321] [ 30.606519] [ 30.606669] Allocated by task 214: [ 30.606968] kasan_save_stack+0x22/0x50 [ 30.607309] kasan_set_track+0x25/0x30 [ 30.607628] __kasan_slab_alloc+0x59/0x70 [ 30.607964] kmem_cache_alloc+0x16b/0x370 [ 30.608312] vm_area_dup+0x20/0x160 [ 30.608614] __split_vma+0x170/0x950 [ 30.608905] split_vma+0xc6/0x110 [ 30.609176] mprotect_fixup+0x8d2/0xb30 [ 30.609522] do_mprotect_pkey+0x87e/0xd40 [ 30.609853] __x64_sys_mprotect+0x78/0xc0 [ 30.610184] do_syscall_64+0x3f/0x90 [ 30.610485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.610928] [ 30.611069] Freed by task 214: [ 30.611336] kasan_save_stack+0x22/0x50 [ 30.611676] kasan_set_track+0x25/0x30 [ 30.612010] kasan_save_free_info+0x2b/0x50 [ 30.612395] __kasan_slab_free+0x10a/0x190 [ 30.612763] kmem_cache_free+0x10d/0x4d0 [ 30.613099] rcu_core+0x8c8/0x2860 [ 30.613462] __do_softirq+0x1b7/0x7d4 [ 30.613779] [ 30.613921] Last potentially related work creation: [ 30.614310] kasan_save_stack+0x22/0x50 [ 30.614633] __kasan_record_aux_stack+0x8e/0xa0 [ 30.615078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.615497] remove_vma+0x139/0x170 [ 30.615796] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.616165] do_vmi_munmap+0x1f1/0x2b0 [ 30.616495] __vm_munmap+0x138/0x3a0 [ 30.616829] __x64_sys_munmap+0x59/0x80 [ 30.617178] do_syscall_64+0x3f/0x90 [ 30.617543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.617981] [ 30.618128] Second to last potentially related work creation: [ 30.618578] kasan_save_stack+0x22/0x50 [ 30.618909] __kasan_record_aux_stack+0x8e/0xa0 [ 30.619294] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.619719] remove_vma+0x139/0x170 [ 30.620018] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.620406] do_vmi_munmap+0x1f1/0x2b0 [ 30.620723] mmap_region+0x1f9/0x2660 [ 30.621084] do_mmap+0x854/0xf00 [ 30.621442] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.621784] ksys_mmap_pgoff+0x3af/0x500 [ 30.622128] do_syscall_64+0x3f/0x90 [ 30.622452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.622895] [ 30.623040] The buggy address belongs to the object at ffff888009095d98 [ 30.623040] which belongs to the cache vm_area_struct of size 168 [ 30.624093] The buggy address is located 88 bytes inside of [ 30.624093] freed 168-byte region [ffff888009095d98, ffff888009095e40) [ 30.625047] [ 30.625196] The buggy address belongs to the physical page: [ 30.625672] page:00000000c3858ccc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9095 [ 30.626439] memcg:ffff88800682ec01 [ 30.626740] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.627200] page_type: 0xffffffff() [ 30.627535] raw: 0100000000000200 ffff8880087a0c80 ffffea0000593900 dead000000000006 [ 30.628201] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800682ec01 [ 30.628864] page dumped because: kasan: bad access detected [ 30.629414] [ 30.629568] Memory state around the buggy address: [ 30.629980] ffff888009095c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.630613] ffff888009095d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.631222] >ffff888009095d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.631820] ^ [ 30.632416] ffff888009095e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.633022] ffff888009095e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.633647] ================================================================== [ 30.634605] Disabling lock debugging due to kernel taint [ 32.300833] BUG: Bad rss-counter state mm:000000000625f6e0 type:MM_FILEPAGES val:33 [ 32.301527] BUG: Bad rss-counter state mm:000000000625f6e0 type:MM_ANONPAGES val:22 [ 32.643318] BUG: Bad rss-counter state mm:0000000005f648dd type:MM_FILEPAGES val:33 [ 32.644070] BUG: Bad rss-counter state mm:0000000005f648dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50258' (ECDSA) to the list of known hosts. 2023/06/21 09:44:00 fuzzer started 2023/06/21 09:44:00 dialing manager at localhost:36067 2023/06/21 09:44:00 checking machine... 2023/06/21 09:44:00 checking revisions... [ 33.242659] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:44:00 testing simple program... [ 33.286768] cgroup: Unknown subsys name 'net' [ 33.330524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:43:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a78 RCX=ffff88806ce09b18 RDX=1ffff1100d9c135a RSI=ffff88806ce09b10 RDI=ffff88806ce09a78 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a60 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88801669b680 R15=ffff88800da91b80 RIP=ffffffff81130390 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 00007f27a1038900 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=00007f27a15ef618 CR3=000000001a216000 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=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=00007f7719fe2900 CR3=000000000ec8e000 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=08aa993e0e5ec18c634693e3f5c25651 XMM02=2c67c8bc2e329bc3000000000011b670 XMM03=fb795ef6d65770560000000000122378 XMM04=10f9c4740fb9679200000000000ae988 XMM05=e4cb8bb95a7664b600000000001334a8 XMM06=e3671a18799da0560000000000132310 XMM07=e042d86d42eb936e00000000001225f8 XMM08=d40c16d998e4a5ca000000000011b6d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000