[ 56.040987] BUG: Bad rss-counter state mm:00000000131dd089 type:MM_FILEPAGES val:33 [ 56.042277] BUG: Bad rss-counter state mm:00000000131dd089 type:MM_ANONPAGES val:22 [ 56.086673] ================================================================== [ 56.087578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.088511] Read of size 8 at addr ffff88800e8283f8 by task sshd/219 [ 56.089530] [ 56.089758] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.090616] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.091600] Call Trace: [ 56.091958] <TASK> [ 56.092241] dump_stack_lvl+0x91/0xf0 [ 56.092751] print_report+0xcc/0x620 [ 56.093313] ? __virt_addr_valid+0x102/0x340 [ 56.093864] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.094480] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.095096] kasan_report+0xbe/0xf0 [ 56.095569] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.096225] vma_interval_tree_remove+0xc75/0xec0 [ 56.096868] vma_prepare+0xc54/0x11a0 [ 56.097406] __split_vma+0x5af/0x950 [ 56.097878] ? __pfx___split_vma+0x10/0x10 [ 56.098406] ? find_held_lock+0x2c/0x110 [ 56.098932] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.099499] ? lock_is_held_type+0x9f/0x120 [ 56.100084] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.100701] ? mtree_range_walk+0x632/0x900 [ 56.101331] ? mas_walk+0x5c7/0x7c0 [ 56.101810] do_vmi_munmap+0x1f1/0x2b0 [ 56.102300] mmap_region+0x1f9/0x2660 [ 56.102786] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.103297] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.104053] ? __pfx_lock_acquire+0x10/0x10 [ 56.104583] ? __pfx_mmap_region+0x10/0x10 [ 56.105169] ? security_mmap_addr+0x7d/0xa0 [ 56.105714] ? get_unmapped_area+0x1f5/0x3f0 [ 56.106260] do_mmap+0x854/0xf00 [ 56.106698] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.107190] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.107746] ksys_mmap_pgoff+0x3af/0x500 [ 56.108250] do_syscall_64+0x3f/0x90 [ 56.108752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.109429] RIP: 0033:0x7f11250a4d82 [ 56.109943] 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 [ 56.112129] RSP: 002b:00007ffce6ffc6a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.113140] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11250a4d82 [ 56.114136] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11244de000 [ 56.114984] RBP: 00007f11244de000 R08: 0000000000000009 R09: 0000000000001000 [ 56.115876] R10: 0000000000000812 R11: 0000000000000206 R12: 000055862a978b20 [ 56.116744] R13: 00007ffce6ffc6c0 R14: 00007ffce6ffc6f0 R15: 00007ffce6ffca50 [ 56.117669] </TASK> [ 56.117960] [ 56.118169] Allocated by task 212: [ 56.118601] kasan_save_stack+0x22/0x50 [ 56.119097] kasan_set_track+0x25/0x30 [ 56.119583] __kasan_slab_alloc+0x59/0x70 [ 56.120100] kmem_cache_alloc+0x16b/0x370 [ 56.120619] vm_area_dup+0x20/0x160 [ 56.121069] __split_vma+0x170/0x950 [ 56.121544] split_vma+0xc6/0x110 [ 56.121995] mprotect_fixup+0x8d2/0xb30 [ 56.122502] do_mprotect_pkey+0x87e/0xd40 [ 56.123034] __x64_sys_mprotect+0x78/0xc0 [ 56.123558] do_syscall_64+0x3f/0x90 [ 56.124028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.124667] [ 56.124923] Freed by task 212: [ 56.125338] kasan_save_stack+0x22/0x50 [ 56.125869] kasan_set_track+0x25/0x30 [ 56.126405] kasan_save_free_info+0x2b/0x50 [ 56.126933] __kasan_slab_free+0x10a/0x190 [ 56.127462] kmem_cache_free+0x10d/0x4d0 [ 56.128011] rcu_core+0x8c8/0x2860 [ 56.128452] __do_softirq+0x1b7/0x7d4 [ 56.128983] [ 56.129231] Last potentially related work creation: [ 56.129830] kasan_save_stack+0x22/0x50 [ 56.130407] __kasan_record_aux_stack+0x8e/0xa0 [ 56.131024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.131680] remove_vma+0x139/0x170 [ 56.132211] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.132769] do_vmi_munmap+0x1f1/0x2b0 [ 56.133256] __vm_munmap+0x138/0x3a0 [ 56.133750] __x64_sys_munmap+0x59/0x80 [ 56.134241] do_syscall_64+0x3f/0x90 [ 56.134715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.135357] [ 56.135577] The buggy address belongs to the object at ffff88800e8283a0 [ 56.135577] which belongs to the cache vm_area_struct of size 168 [ 56.137193] The buggy address is located 88 bytes inside of [ 56.137193] freed 168-byte region [ffff88800e8283a0, ffff88800e828448) [ 56.138580] [ 56.138819] The buggy address belongs to the physical page: [ 56.139490] page:00000000b82d7210 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe828 [ 56.140640] memcg:ffff88800e87f401 [ 56.141061] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 56.141768] page_type: 0xffffffff() [ 56.142212] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 56.143162] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e87f401 [ 56.144103] page dumped because: kasan: bad access detected [ 56.144754] [ 56.144970] Memory state around the buggy address: [ 56.145619] ffff88800e828280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 56.146492] ffff88800e828300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 56.147347] >ffff88800e828380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 56.148248] ^ [ 56.149161] ffff88800e828400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 56.150024] ffff88800e828480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.150900] ================================================================== [ 56.151932] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 58.892084] BUG: Bad rss-counter state mm:00000000d0dfdf1c type:MM_FILEPAGES val:33 [ 58.893212] BUG: Bad rss-counter state mm:00000000d0dfdf1c type:MM_ANONPAGES val:22 [ 59.435836] BUG: Bad rss-counter state mm:0000000034e6a095 type:MM_FILEPAGES val:33 [ 59.437466] BUG: Bad rss-counter state mm:0000000034e6a095 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23005' (ECDSA) to the list of known hosts. 2023/06/20 00:19:34 fuzzer started 2023/06/20 00:19:35 dialing manager at localhost:44161 2023/06/20 00:19:35 checking machine... 2023/06/20 00:19:35 checking revisions... [ 60.220014] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:19:35 testing simple program... [ 60.270357] cgroup: Unknown subsys name 'net' [ 60.332138] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:19:10 Registers: info registers vcpu 0 RAX=0000000080010002 RBX=00000000005b99b3 RCX=ffffffff813c81a0 RDX=ffff888016521b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88806ce09db8 RSP=ffff88806ce09cf0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000000000 R13=00000000002aa4fc R14=000000000011b3c0 R15=0000000000000000 RIP=ffffffff814c07eb RFL=00000046 [---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 00007f8359bf2700 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=00007f0a7ec72650 CR3=0000000016ac4000 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=2034333a39313a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a39313a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000031 RCX=0000000000000000 RDX=ffff888014751b40 RSI=ffffffff81f38384 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888010357a48 R8 =0000000000000005 R9 =000000000000001b R10=0000000000000001 R11=00000000000b6996 R12=ffff888009bcc000 R13=0000000000000001 R14=0000000000000062 R15=dffffc0000000000 RIP=ffffffff814c0800 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 00007f0a7e6bd900 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=00007f0a7ec750b0 CR3=000000001ce3a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000