[ 23.894211] BUG: Bad rss-counter state mm:000000001ef7110a type:MM_FILEPAGES val:33 [ 23.896195] BUG: Bad rss-counter state mm:000000001ef7110a type:MM_ANONPAGES val:22 [ 24.060151] ================================================================== [ 24.061200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.062496] Read of size 8 at addr ffff88800df70798 by task sshd/219 [ 24.063398] [ 24.063649] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.064702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.065801] Call Trace: [ 24.066158] [ 24.066440] dump_stack_lvl+0x91/0xf0 [ 24.066943] print_report+0xcc/0x620 [ 24.067446] ? __virt_addr_valid+0x102/0x340 [ 24.068142] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.068930] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.069713] kasan_report+0xbe/0xf0 [ 24.070368] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.071213] vma_interval_tree_remove+0xc75/0xec0 [ 24.072019] vma_prepare+0xc54/0x11a0 [ 24.072663] __split_vma+0x5af/0x950 [ 24.073299] ? __pfx___split_vma+0x10/0x10 [ 24.074009] ? find_held_lock+0x2c/0x110 [ 24.074754] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.075517] ? lock_is_held_type+0x9f/0x120 [ 24.076245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.077065] ? mtree_range_walk+0x632/0x900 [ 24.077807] ? mas_walk+0x5c7/0x7c0 [ 24.078462] do_vmi_munmap+0x1f1/0x2b0 [ 24.079138] mmap_region+0x1f9/0x2660 [ 24.079784] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.080478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.081436] ? __pfx_lock_acquire+0x10/0x10 [ 24.082163] ? __pfx_mmap_region+0x10/0x10 [ 24.082866] ? security_mmap_addr+0x7d/0xa0 [ 24.083588] ? get_unmapped_area+0x1f5/0x3f0 [ 24.084332] do_mmap+0x854/0xf00 [ 24.084932] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.085607] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.086384] ksys_mmap_pgoff+0x3af/0x500 [ 24.087061] do_syscall_64+0x3f/0x90 [ 24.087706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.088426] RIP: 0033:0x7fa1bed22d82 [ 24.088927] 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 [ 24.091171] RSP: 002b:00007ffc98e04d98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.092088] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1bed22d82 [ 24.092958] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa1be15c000 [ 24.093813] RBP: 00007fa1be15c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.094883] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b817367d90 [ 24.095738] R13: 00007ffc98e04db0 R14: 00007ffc98e04de0 R15: 00007ffc98e05140 [ 24.096613] [ 24.096955] [ 24.097233] Allocated by task 212: [ 24.097797] kasan_save_stack+0x22/0x50 [ 24.098477] kasan_set_track+0x25/0x30 [ 24.099128] __kasan_slab_alloc+0x59/0x70 [ 24.099806] kmem_cache_alloc+0x16b/0x370 [ 24.100478] vm_area_dup+0x20/0x160 [ 24.101079] __split_vma+0x170/0x950 [ 24.101686] split_vma+0xc6/0x110 [ 24.102249] mprotect_fixup+0x8d2/0xb30 [ 24.102763] do_mprotect_pkey+0x87e/0xd40 [ 24.103280] __x64_sys_mprotect+0x78/0xc0 [ 24.103954] do_syscall_64+0x3f/0x90 [ 24.104437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.105068] [ 24.105288] Freed by task 210: [ 24.105684] kasan_save_stack+0x22/0x50 [ 24.106208] kasan_set_track+0x25/0x30 [ 24.106703] kasan_save_free_info+0x2b/0x50 [ 24.107237] __kasan_slab_free+0x10a/0x190 [ 24.107764] kmem_cache_free+0x10d/0x4d0 [ 24.108262] rcu_core+0x8c8/0x2860 [ 24.108707] __do_softirq+0x1b7/0x7d4 [ 24.109188] [ 24.109407] Last potentially related work creation: [ 24.109990] kasan_save_stack+0x22/0x50 [ 24.110505] __kasan_record_aux_stack+0x8e/0xa0 [ 24.111068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.111717] remove_vma+0x139/0x170 [ 24.112168] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.112725] do_vmi_munmap+0x1f1/0x2b0 [ 24.113201] __vm_munmap+0x138/0x3a0 [ 24.113669] __x64_sys_munmap+0x59/0x80 [ 24.114162] do_syscall_64+0x3f/0x90 [ 24.114631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.115275] [ 24.115487] Second to last potentially related work creation: [ 24.116172] kasan_save_stack+0x22/0x50 [ 24.116668] __kasan_record_aux_stack+0x8e/0xa0 [ 24.117234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.117875] remove_vma+0x139/0x170 [ 24.118343] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.118893] do_vmi_munmap+0x1f1/0x2b0 [ 24.119370] mmap_region+0x1f9/0x2660 [ 24.119843] do_mmap+0x854/0xf00 [ 24.120265] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.120747] ksys_mmap_pgoff+0x3af/0x500 [ 24.121240] do_syscall_64+0x3f/0x90 [ 24.121718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.122363] [ 24.122575] The buggy address belongs to the object at ffff88800df70740 [ 24.122575] which belongs to the cache vm_area_struct of size 168 [ 24.124024] The buggy address is located 88 bytes inside of [ 24.124024] freed 168-byte region [ffff88800df70740, ffff88800df707e8) [ 24.125407] [ 24.125622] The buggy address belongs to the physical page: [ 24.126297] page:000000003c3e4dc9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf70 [ 24.127358] memcg:ffff88800e65f401 [ 24.127782] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.128415] page_type: 0xffffffff() [ 24.128861] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.129766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e65f401 [ 24.130674] page dumped because: kasan: bad access detected [ 24.131324] [ 24.131543] Memory state around the buggy address: [ 24.132120] ffff88800df70680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.132963] ffff88800df70700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.133813] >ffff88800df70780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.134672] ^ [ 24.135163] ffff88800df70800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.135998] ffff88800df70880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.136836] ================================================================== [ 24.137798] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.916764] BUG: Bad rss-counter state mm:00000000de71b238 type:MM_FILEPAGES val:33 [ 25.917871] BUG: Bad rss-counter state mm:00000000de71b238 type:MM_ANONPAGES val:22 [ 26.368146] BUG: Bad rss-counter state mm:0000000076aa6c94 type:MM_FILEPAGES val:33 [ 26.369038] BUG: Bad rss-counter state mm:0000000076aa6c94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43849' (ECDSA) to the list of known hosts. 2023/06/20 11:26:16 fuzzer started 2023/06/20 11:26:16 dialing manager at localhost:36067 2023/06/20 11:26:16 checking machine... 2023/06/20 11:26:16 checking revisions... [ 27.108487] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:26:16 testing simple program... [ 27.157373] cgroup: Unknown subsys name 'net' [ 27.195407] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:26:15 Registers: info registers vcpu 0 RAX=000055bea432febb RBX=000055bea432feb0 RCX=0000000000000010 RDX=0000000000000000 RSI=0000000000000023 RDI=000055bea432fea0 RBP=000000000000000c RSP=00007ffd5621c0e8 R8 =000055bea435cf27 R9 =00007fef2f9c3be0 R10=0000000000000100 R11=0000000000000246 R12=000055bea434ded0 R13=00007ffd5621c0f8 R14=00007fef2f3ecb22 R15=00007fef2f411710 RIP=00007fef2f964530 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fef2f411900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd56216000 CR3=0000000008eb4000 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=23232323232323232323232323232323 XMM01=00000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=6c6c6568732065687420666f20656d61 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffff0000ffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007f5c8c9ab960 CR3=0000000017350000 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=2035313a36323a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a36323a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000