[ 27.131619] BUG: Bad rss-counter state mm:000000002cb3d9cb type:MM_FILEPAGES val:33 [ 27.132873] BUG: Bad rss-counter state mm:000000002cb3d9cb type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.167214] ================================================================== [ 27.168322] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.169472] Read of size 8 at addr ffff88800d6c9c20 by task sshd/219 [ 27.170397] [ 27.170621] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.171550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.172856] Call Trace: [ 27.173275] [ 27.173569] dump_stack_lvl+0x91/0xf0 [ 27.174089] print_report+0xcc/0x620 [ 27.174589] ? __virt_addr_valid+0x102/0x340 [ 27.175162] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.175797] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.176442] kasan_report+0xbe/0xf0 [ 27.176931] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.177577] vma_interval_tree_remove+0xc75/0xec0 [ 27.178234] vma_prepare+0xc54/0x11a0 [ 27.178739] __split_vma+0x5af/0x950 [ 27.179381] ? __pfx___split_vma+0x10/0x10 [ 27.179936] ? find_held_lock+0x2c/0x110 [ 27.180469] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.181043] ? lock_is_held_type+0x9f/0x120 [ 27.181625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.182254] ? mtree_range_walk+0x632/0x900 [ 27.182814] ? mas_walk+0x5c7/0x7c0 [ 27.183300] do_vmi_munmap+0x1f1/0x2b0 [ 27.183809] mmap_region+0x1f9/0x2660 [ 27.184301] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.184826] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.185558] ? __pfx_lock_acquire+0x10/0x10 [ 27.186117] ? __pfx_mmap_region+0x10/0x10 [ 27.186666] ? security_mmap_addr+0x7d/0xa0 [ 27.187209] ? get_unmapped_area+0x1f5/0x3f0 [ 27.187772] do_mmap+0x854/0xf00 [ 27.188223] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.188731] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.189306] ksys_mmap_pgoff+0x3af/0x500 [ 27.189849] do_syscall_64+0x3f/0x90 [ 27.190342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.191029] RIP: 0033:0x7fc90f205d82 [ 27.191504] 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 [ 27.193863] RSP: 002b:00007ffe8f659638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.194802] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc90f205d82 [ 27.195696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc90e63f000 [ 27.196582] RBP: 00007fc90e63f000 R08: 0000000000000009 R09: 0000000000001000 [ 27.197469] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f16932ec0 [ 27.198379] R13: 00007ffe8f659650 R14: 00007ffe8f659680 R15: 00007ffe8f6599e0 [ 27.199265] [ 27.199573] [ 27.199798] Allocated by task 212: [ 27.200249] kasan_save_stack+0x22/0x50 [ 27.200771] kasan_set_track+0x25/0x30 [ 27.201289] __kasan_slab_alloc+0x59/0x70 [ 27.201847] kmem_cache_alloc+0x16b/0x370 [ 27.202371] vm_area_dup+0x20/0x160 [ 27.202846] __split_vma+0x170/0x950 [ 27.203328] split_vma+0xc6/0x110 [ 27.203786] mprotect_fixup+0x8d2/0xb30 [ 27.204305] do_mprotect_pkey+0x87e/0xd40 [ 27.204847] __x64_sys_mprotect+0x78/0xc0 [ 27.205383] do_syscall_64+0x3f/0x90 [ 27.205887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.206541] [ 27.206761] Freed by task 212: [ 27.207160] kasan_save_stack+0x22/0x50 [ 27.207686] kasan_set_track+0x25/0x30 [ 27.208203] kasan_save_free_info+0x2b/0x50 [ 27.208756] __kasan_slab_free+0x10a/0x190 [ 27.209307] kmem_cache_free+0x10d/0x4d0 [ 27.209836] rcu_core+0x8c8/0x2860 [ 27.210285] __do_softirq+0x1b7/0x7d4 [ 27.210753] [ 27.210968] Last potentially related work creation: [ 27.211555] kasan_save_stack+0x22/0x50 [ 27.212062] __kasan_record_aux_stack+0x8e/0xa0 [ 27.212626] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.213263] remove_vma+0x139/0x170 [ 27.213739] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.214299] do_vmi_munmap+0x1f1/0x2b0 [ 27.214779] __vm_munmap+0x138/0x3a0 [ 27.215258] __x64_sys_munmap+0x59/0x80 [ 27.215751] do_syscall_64+0x3f/0x90 [ 27.216222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.216862] [ 27.217079] The buggy address belongs to the object at ffff88800d6c9bc8 [ 27.217079] which belongs to the cache vm_area_struct of size 168 [ 27.218558] The buggy address is located 88 bytes inside of [ 27.218558] freed 168-byte region [ffff88800d6c9bc8, ffff88800d6c9c70) [ 27.219959] [ 27.220174] The buggy address belongs to the physical page: [ 27.220830] page:0000000067433797 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6c9 [ 27.221986] memcg:ffff88800fdabd01 [ 27.222414] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.223055] page_type: 0xffffffff() [ 27.223502] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.224416] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdabd01 [ 27.225308] page dumped because: kasan: bad access detected [ 27.225978] [ 27.226191] Memory state around the buggy address: [ 27.226774] ffff88800d6c9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.227646] ffff88800d6c9b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 27.228500] >ffff88800d6c9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 27.229351] ^ [ 27.229882] ffff88800d6c9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 27.230737] ffff88800d6c9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 27.231587] ================================================================== [ 27.232599] Disabling lock debugging due to kernel taint [ 29.456447] BUG: Bad rss-counter state mm:000000007411eafa type:MM_FILEPAGES val:33 [ 29.457662] BUG: Bad rss-counter state mm:000000007411eafa type:MM_ANONPAGES val:22 [ 29.932479] BUG: Bad rss-counter state mm:000000007073a468 type:MM_FILEPAGES val:33 [ 29.933731] BUG: Bad rss-counter state mm:000000007073a468 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4446' (ECDSA) to the list of known hosts. 2023/06/20 00:02:16 fuzzer started 2023/06/20 00:02:17 dialing manager at localhost:44161 2023/06/20 00:02:17 checking machine... 2023/06/20 00:02:17 checking revisions... [ 30.674077] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:02:17 testing simple program... [ 30.726242] cgroup: Unknown subsys name 'net' [ 30.807674] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:02:13 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000283 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff856d8220 RBP=ffffffff8452fffc RSP=ffff888017fb7c98 R8 =0000000000000000 R9 =fffffbfff0adb044 R10=ffffffff856d8223 R11=00000000000b6996 R12=0000000000000283 R13=ffff88800d0c0638 R14=ffffffff818c75ae R15=ffff88800fcc6580 RIP=ffffffff81534237 RFL=00000002 [-------] 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 00007fcc9c58c900 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=00007fffe51e7000 CR3=000000000c792000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fa5110e5020 CR3=000000000ebe8000 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=2036313a32303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a32303a3030203032 XMM08=00000000000000000000005e00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000