syzkaller login: [ 31.161954] BUG: Bad rss-counter state mm:000000003166bc51 type:MM_FILEPAGES val:33 [ 31.163192] BUG: Bad rss-counter state mm:000000003166bc51 type:MM_ANONPAGES val:22 [ 31.201940] ================================================================== [ 31.203031] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.204298] Read of size 8 at addr ffff888015f2c140 by task sshd/221 [ 31.205389] [ 31.205669] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.206774] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208046] Call Trace: [ 31.208537] [ 31.208983] dump_stack_lvl+0x91/0xf0 [ 31.209652] print_report+0xcc/0x620 [ 31.210298] ? __virt_addr_valid+0x102/0x340 [ 31.210963] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211748] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212726] kasan_report+0xbe/0xf0 [ 31.213340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.214076] vma_interval_tree_remove+0xc75/0xec0 [ 31.214847] vma_prepare+0xc54/0x11a0 [ 31.215464] __split_vma+0x5af/0x950 [ 31.216060] ? __pfx___split_vma+0x10/0x10 [ 31.216688] ? find_held_lock+0x2c/0x110 [ 31.217275] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.217903] ? lock_is_held_type+0x9f/0x120 [ 31.218493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.219145] ? mtree_range_walk+0x632/0x900 [ 31.219752] ? mas_walk+0x5c7/0x7c0 [ 31.220274] do_vmi_munmap+0x1f1/0x2b0 [ 31.220807] mmap_region+0x1f9/0x2660 [ 31.221329] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.221893] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.222667] ? __pfx_lock_acquire+0x10/0x10 [ 31.223246] ? __pfx_mmap_region+0x10/0x10 [ 31.223818] ? security_mmap_addr+0x7d/0xa0 [ 31.224388] ? get_unmapped_area+0x1f5/0x3f0 [ 31.224973] do_mmap+0x854/0xf00 [ 31.225445] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.225991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.226592] ksys_mmap_pgoff+0x3af/0x500 [ 31.227141] do_syscall_64+0x3f/0x90 [ 31.227664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.228368] RIP: 0033:0x7f7b74c01d82 [ 31.228865] 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 [ 31.231151] RSP: 002b:00007fffd7af8448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.232119] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b74c01d82 [ 31.233038] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b7403b000 [ 31.233959] RBP: 00007f7b7403b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.234855] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a03a643ec0 [ 31.235755] R13: 00007fffd7af8460 R14: 00007fffd7af8490 R15: 00007fffd7af87f0 [ 31.236674] [ 31.236983] [ 31.237213] Allocated by task 214: [ 31.237672] kasan_save_stack+0x22/0x50 [ 31.238228] kasan_set_track+0x25/0x30 [ 31.238757] __kasan_slab_alloc+0x59/0x70 [ 31.239314] kmem_cache_alloc+0x16b/0x370 [ 31.239879] vm_area_dup+0x20/0x160 [ 31.240362] __split_vma+0x170/0x950 [ 31.240859] split_vma+0xc6/0x110 [ 31.241334] mprotect_fixup+0x8d2/0xb30 [ 31.241876] do_mprotect_pkey+0x87e/0xd40 [ 31.242432] __x64_sys_mprotect+0x78/0xc0 [ 31.243002] do_syscall_64+0x3f/0x90 [ 31.243517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.244204] [ 31.244435] Freed by task 214: [ 31.244851] kasan_save_stack+0x22/0x50 [ 31.245402] kasan_set_track+0x25/0x30 [ 31.245943] kasan_save_free_info+0x2b/0x50 [ 31.246516] __kasan_slab_free+0x10a/0x190 [ 31.247089] kmem_cache_free+0x10d/0x4d0 [ 31.247635] rcu_core+0x8c8/0x2860 [ 31.248111] __do_softirq+0x1b7/0x7d4 [ 31.248626] [ 31.248856] Last potentially related work creation: [ 31.249483] kasan_save_stack+0x22/0x50 [ 31.250048] __kasan_record_aux_stack+0x8e/0xa0 [ 31.250670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.251359] remove_vma+0x139/0x170 [ 31.251843] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.252437] do_vmi_munmap+0x1f1/0x2b0 [ 31.252965] __vm_munmap+0x138/0x3a0 [ 31.253471] __x64_sys_munmap+0x59/0x80 [ 31.254013] do_syscall_64+0x3f/0x90 [ 31.254528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.255219] [ 31.255447] The buggy address belongs to the object at ffff888015f2c0e8 [ 31.255447] which belongs to the cache vm_area_struct of size 168 [ 31.257015] The buggy address is located 88 bytes inside of [ 31.257015] freed 168-byte region [ffff888015f2c0e8, ffff888015f2c190) [ 31.258622] [ 31.258853] The buggy address belongs to the physical page: [ 31.259550] page:00000000af1b781b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f2c [ 31.260831] memcg:ffff88800eb5c801 [ 31.261293] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.261995] page_type: 0xffffffff() [ 31.262479] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.263457] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb5c801 [ 31.264429] page dumped because: kasan: bad access detected [ 31.265140] [ 31.265370] Memory state around the buggy address: [ 31.265998] ffff888015f2c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.266898] ffff888015f2c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.267802] >ffff888015f2c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.268713] ^ [ 31.269401] ffff888015f2c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.270341] ffff888015f2c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.271301] ================================================================== [ 31.272427] Disabling lock debugging due to kernel taint [ 33.494463] BUG: Bad rss-counter state mm:000000001f2bcaae type:MM_FILEPAGES val:33 [ 33.495888] BUG: Bad rss-counter state mm:000000001f2bcaae type:MM_ANONPAGES val:22 [ 34.036166] BUG: Bad rss-counter state mm:0000000011266b3b type:MM_FILEPAGES val:33 [ 34.037381] BUG: Bad rss-counter state mm:0000000011266b3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32252' (ECDSA) to the list of known hosts. 2023/06/21 02:28:19 fuzzer started 2023/06/21 02:28:19 dialing manager at localhost:36067 2023/06/21 02:28:19 checking machine... 2023/06/21 02:28:19 checking revisions... [ 34.685893] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:28:19 testing simple program... [ 34.734904] cgroup: Unknown subsys name 'net' [ 34.785721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:28:18 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000275f4560 RCX=ffff88806cba2b00 RDX=0000000000000011 RSI=0000000000000001 RDI=00000000b527cdde RBP=ffff88800dadc000 RSP=ffff888015f27560 R8 =00000000a5c63d99 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888015f275c8 R15=0000000000000011 RIP=ffffffff822704d3 RFL=00000206 [-----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 00007ff6a3fff700 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=00007fdea5ed9618 CR3=00000000094e4000 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=2038313a38323a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a38323a3230203132 XMM08=69767265733d7373616c63742030733a 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=00007f460c48e1a0 CR3=0000000008c74000 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=38724b34df74a7b0234e4417c33e5236 XMM02=0000000000120090eff9b2d0a8fce9cb XMM03=00000000001201602c67c8bc2e329bc3 XMM04=616ecf46847346bd00000000000ae988 XMM05=e4cb8bb95a7664b60000000000133000 XMM06=96e98e578ba914f70000000000131e68 XMM07=e042d86d42eb936e0000000000123410 XMM08=a7ae6da37552c9040000000000120160 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000