[ 24.013887] BUG: Bad rss-counter state mm:000000009cc9f8a1 type:MM_FILEPAGES val:33 [ 24.015264] BUG: Bad rss-counter state mm:000000009cc9f8a1 type:MM_ANONPAGES val:22 [ 24.174736] ================================================================== [ 24.175818] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.177036] Read of size 8 at addr ffff88800ffd5a50 by task sshd/219 [ 24.177884] [ 24.178104] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.178962] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.179960] Call Trace: [ 24.180279] [ 24.180568] dump_stack_lvl+0x91/0xf0 [ 24.181072] print_report+0xcc/0x620 [ 24.181563] ? __virt_addr_valid+0x102/0x340 [ 24.182120] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.182748] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.183366] kasan_report+0xbe/0xf0 [ 24.183846] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.184468] vma_interval_tree_remove+0xc75/0xec0 [ 24.185101] vma_prepare+0xc54/0x11a0 [ 24.185580] __split_vma+0x5af/0x950 [ 24.186053] ? __pfx___split_vma+0x10/0x10 [ 24.186599] ? find_held_lock+0x2c/0x110 [ 24.187117] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.187679] ? lock_is_held_type+0x9f/0x120 [ 24.188218] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.188835] ? mtree_range_walk+0x632/0x900 [ 24.189391] ? mas_walk+0x5c7/0x7c0 [ 24.189864] do_vmi_munmap+0x1f1/0x2b0 [ 24.190354] mmap_region+0x1f9/0x2660 [ 24.190837] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.191348] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.192065] ? __pfx_lock_acquire+0x10/0x10 [ 24.192606] ? __pfx_mmap_region+0x10/0x10 [ 24.193144] ? security_mmap_addr+0x7d/0xa0 [ 24.193672] ? get_unmapped_area+0x1f5/0x3f0 [ 24.194219] do_mmap+0x854/0xf00 [ 24.194661] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.195152] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.195714] ksys_mmap_pgoff+0x3af/0x500 [ 24.196221] do_syscall_64+0x3f/0x90 [ 24.196799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.197539] RIP: 0033:0x7fed5c932d82 [ 24.197995] 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 [ 24.200233] RSP: 002b:00007ffd49410438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.201163] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed5c932d82 [ 24.202006] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed5bd6c000 [ 24.202852] RBP: 00007fed5bd6c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.203694] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a70adc8f60 [ 24.204533] R13: 00007ffd49410450 R14: 00007ffd49410480 R15: 00007ffd494107e0 [ 24.205405] [ 24.205698] [ 24.205911] Allocated by task 212: [ 24.206371] kasan_save_stack+0x22/0x50 [ 24.206885] kasan_set_track+0x25/0x30 [ 24.207376] __kasan_slab_alloc+0x59/0x70 [ 24.207897] kmem_cache_alloc+0x16b/0x370 [ 24.208414] vm_area_dup+0x20/0x160 [ 24.208881] __split_vma+0x170/0x950 [ 24.209347] split_vma+0xc6/0x110 [ 24.209787] mprotect_fixup+0x8d2/0xb30 [ 24.210299] do_mprotect_pkey+0x87e/0xd40 [ 24.210825] __x64_sys_mprotect+0x78/0xc0 [ 24.211345] do_syscall_64+0x3f/0x90 [ 24.211826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.212477] [ 24.212703] Freed by task 212: [ 24.213098] kasan_save_stack+0x22/0x50 [ 24.213608] kasan_set_track+0x25/0x30 [ 24.214102] kasan_save_free_info+0x2b/0x50 [ 24.214634] __kasan_slab_free+0x10a/0x190 [ 24.215169] kmem_cache_free+0x10d/0x4d0 [ 24.215685] rcu_core+0x8c8/0x2860 [ 24.216135] __do_softirq+0x1b7/0x7d4 [ 24.216630] [ 24.216865] Last potentially related work creation: [ 24.217486] kasan_save_stack+0x22/0x50 [ 24.218088] __kasan_record_aux_stack+0x8e/0xa0 [ 24.218702] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.219386] remove_vma+0x139/0x170 [ 24.219864] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.220452] do_vmi_munmap+0x1f1/0x2b0 [ 24.220977] __vm_munmap+0x138/0x3a0 [ 24.221483] __x64_sys_munmap+0x59/0x80 [ 24.222015] do_syscall_64+0x3f/0x90 [ 24.222519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.223213] [ 24.223440] The buggy address belongs to the object at ffff88800ffd59f8 [ 24.223440] which belongs to the cache vm_area_struct of size 168 [ 24.225046] The buggy address is located 88 bytes inside of [ 24.225046] freed 168-byte region [ffff88800ffd59f8, ffff88800ffd5aa0) [ 24.226567] [ 24.226792] The buggy address belongs to the physical page: [ 24.227496] page:0000000029e554ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xffd5 [ 24.228657] memcg:ffff88800df70601 [ 24.229128] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.229824] page_type: 0xffffffff() [ 24.230304] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.231284] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df70601 [ 24.232251] page dumped because: kasan: bad access detected [ 24.232975] [ 24.233202] Memory state around the buggy address: [ 24.233813] ffff88800ffd5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.234728] ffff88800ffd5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.235650] >ffff88800ffd5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.236556] ^ [ 24.237313] ffff88800ffd5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.238232] ffff88800ffd5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.239151] ================================================================== [ 24.240201] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.688422] BUG: Bad rss-counter state mm:00000000d5959cd0 type:MM_FILEPAGES val:33 [ 26.689610] BUG: Bad rss-counter state mm:00000000d5959cd0 type:MM_ANONPAGES val:22 [ 27.233316] BUG: Bad rss-counter state mm:00000000f5083506 type:MM_FILEPAGES val:33 [ 27.234461] BUG: Bad rss-counter state mm:00000000f5083506 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18136' (ECDSA) to the list of known hosts. 2023/06/21 01:54:04 fuzzer started 2023/06/21 01:54:04 dialing manager at localhost:36067 2023/06/21 01:54:04 checking machine... 2023/06/21 01:54:04 checking revisions... [ 27.872476] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:54:05 testing simple program... [ 27.921476] cgroup: Unknown subsys name 'net' [ 27.995125] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:54:04 Registers: info registers vcpu 0 RAX=0000563488e34eb1 RBX=0000563488e34eb0 RCX=0000000000000010 RDX=0000000000000000 RSI=0000000000000023 RDI=0000563488e34ea0 RBP=0000000000000002 RSP=00007fff566d71d8 R8 =0000563488e614b0 R9 =00007fe390d9cbe0 R10=0000000000000100 R11=0000000000000246 R12=0000563488e52ed0 R13=00007fff566d71e8 R14=00007fe3907c5b22 R15=0000000000000000 RIP=00007fe390d3d52b 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 00007fe3907ea900 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=00007fff566d1000 CR3=0000000019f4a000 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=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=00000000000000810000363532616873 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=00007ff75f944710 CR3=000000000d812000 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=2034303a34353a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a34353a3130203132 XMM08=00000000000000000000006a00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000