syzkaller login: [ 30.878252] BUG: Bad rss-counter state mm:000000000ccfc86c type:MM_FILEPAGES val:33 [ 30.879755] BUG: Bad rss-counter state mm:000000000ccfc86c type:MM_ANONPAGES val:22 [ 31.004318] ================================================================== [ 31.004983] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.005613] Read of size 8 at addr ffff88801a24c3f8 by task sshd/219 [ 31.006179] [ 31.006329] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.006921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.007602] Call Trace: [ 31.007826] [ 31.008023] dump_stack_lvl+0x91/0xf0 [ 31.008368] print_report+0xcc/0x620 [ 31.008702] ? __virt_addr_valid+0x102/0x340 [ 31.009272] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.009697] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.010150] kasan_report+0xbe/0xf0 [ 31.010477] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.010903] vma_interval_tree_remove+0xc75/0xec0 [ 31.011310] vma_prepare+0xc54/0x11a0 [ 31.011642] __split_vma+0x5af/0x950 [ 31.011962] ? __pfx___split_vma+0x10/0x10 [ 31.012326] ? find_held_lock+0x2c/0x110 [ 31.012684] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.013073] ? lock_is_held_type+0x9f/0x120 [ 31.013446] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.013851] ? mtree_range_walk+0x632/0x900 [ 31.014289] ? mas_walk+0x5c7/0x7c0 [ 31.014609] do_vmi_munmap+0x1f1/0x2b0 [ 31.014944] mmap_region+0x1f9/0x2660 [ 31.015268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.015618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.016104] ? __pfx_lock_acquire+0x10/0x10 [ 31.016472] ? __pfx_mmap_region+0x10/0x10 [ 31.016837] ? security_mmap_addr+0x7d/0xa0 [ 31.017204] ? get_unmapped_area+0x1f5/0x3f0 [ 31.017576] do_mmap+0x854/0xf00 [ 31.017883] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.018249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.018637] ksys_mmap_pgoff+0x3af/0x500 [ 31.018983] do_syscall_64+0x3f/0x90 [ 31.019308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.019753] RIP: 0033:0x7f11f1e4bd82 [ 31.020068] 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 [ 31.021518] RSP: 002b:00007ffd3f1a4a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.022169] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11f1e4bd82 [ 31.022739] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11f1285000 [ 31.023322] RBP: 00007f11f1285000 R08: 0000000000000009 R09: 0000000000001000 [ 31.023899] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591f1c98ec0 [ 31.024486] R13: 00007ffd3f1a4a40 R14: 00007ffd3f1a4a70 R15: 00007ffd3f1a4dd0 [ 31.025079] [ 31.025278] [ 31.025421] Allocated by task 212: [ 31.025709] kasan_save_stack+0x22/0x50 [ 31.026078] kasan_set_track+0x25/0x30 [ 31.026435] __kasan_slab_alloc+0x59/0x70 [ 31.026797] kmem_cache_alloc+0x16b/0x370 [ 31.027146] vm_area_dup+0x20/0x160 [ 31.027460] __split_vma+0x170/0x950 [ 31.027780] split_vma+0xc6/0x110 [ 31.028072] mprotect_fixup+0x8d2/0xb30 [ 31.028420] do_mprotect_pkey+0x87e/0xd40 [ 31.028773] __x64_sys_mprotect+0x78/0xc0 [ 31.029132] do_syscall_64+0x3f/0x90 [ 31.029454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029891] [ 31.030063] Freed by task 212: [ 31.030342] kasan_save_stack+0x22/0x50 [ 31.030684] kasan_set_track+0x25/0x30 [ 31.031017] kasan_save_free_info+0x2b/0x50 [ 31.031373] __kasan_slab_free+0x10a/0x190 [ 31.031736] kmem_cache_free+0x10d/0x4d0 [ 31.032085] rcu_core+0x8c8/0x2860 [ 31.032383] __do_softirq+0x1b7/0x7d4 [ 31.032713] [ 31.032859] Last potentially related work creation: [ 31.033267] kasan_save_stack+0x22/0x50 [ 31.033606] __kasan_record_aux_stack+0x8e/0xa0 [ 31.034037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.034488] remove_vma+0x139/0x170 [ 31.034800] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.035183] do_vmi_munmap+0x1f1/0x2b0 [ 31.035517] __vm_munmap+0x138/0x3a0 [ 31.035830] __x64_sys_munmap+0x59/0x80 [ 31.036168] do_syscall_64+0x3f/0x90 [ 31.036492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.036932] [ 31.037077] The buggy address belongs to the object at ffff88801a24c3a0 [ 31.037077] which belongs to the cache vm_area_struct of size 168 [ 31.038103] The buggy address is located 88 bytes inside of [ 31.038103] freed 168-byte region [ffff88801a24c3a0, ffff88801a24c448) [ 31.039047] [ 31.039205] The buggy address belongs to the physical page: [ 31.039663] page:0000000088ace12b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a24c [ 31.040418] memcg:ffff88800f190c01 [ 31.040707] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.041149] page_type: 0xffffffff() [ 31.041457] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.042118] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f190c01 [ 31.042738] page dumped because: kasan: bad access detected [ 31.043230] [ 31.043375] Memory state around the buggy address: [ 31.043781] ffff88801a24c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.044404] ffff88801a24c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.044988] >ffff88801a24c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.045574] ^ [ 31.046204] ffff88801a24c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.046797] ffff88801a24c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.047380] ================================================================== [ 31.048001] Disabling lock debugging due to kernel taint [ 32.445378] BUG: Bad rss-counter state mm:000000006e61e1cd type:MM_FILEPAGES val:33 [ 32.446719] BUG: Bad rss-counter state mm:000000006e61e1cd type:MM_ANONPAGES val:22 [ 32.821189] BUG: Bad rss-counter state mm:00000000954e247a type:MM_FILEPAGES val:33 [ 32.821946] BUG: Bad rss-counter state mm:00000000954e247a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36430' (ECDSA) to the list of known hosts. 2023/06/21 09:20:58 fuzzer started 2023/06/21 09:20:59 dialing manager at localhost:36067 2023/06/21 09:20:59 checking machine... 2023/06/21 09:20:59 checking revisions... [ 33.428731] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:20:59 testing simple program... [ 33.469254] cgroup: Unknown subsys name 'net' [ 33.507560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:20:58 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015973680 RSI=ffffffff818ea1ea RDI=0000000000000005 RBP=0000000000000003 RSP=ffff88800ec478c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ded3900 R13=ffff88800ded3900 R14=ffff88800ded3958 R15=0000000000000003 RIP=ffffffff814c0880 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 00007f882d652700 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=00007ffd8f703488 CR3=000000000edf4000 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=2038353a30323a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a30323a3930203132 XMM08=3d656e696c646d632022656369767265 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=00007fdb03078220 CR3=0000000013a72000 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=edaceab41f8650b75c4d5276ab7857cb XMM02=000000000011a4d0ec2efd57dc4c00df XMM03=0000000000121a4821949058a6f5ada8 XMM04=1bb683d52c1e041600000000000ae988 XMM05=dfcdbad4f1609c370000000000131830 XMM06=3a50e9957260e1950000000000130698 XMM07=e042d86d42eb936e0000000000121cc8 XMM08=21949058a6f5ada8000000000011a530 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000