Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.656595] BUG: Bad rss-counter state mm:0000000006ecdb57 type:MM_FILEPAGES val:33 [ 31.657825] BUG: Bad rss-counter state mm:0000000006ecdb57 type:MM_ANONPAGES val:22 [ 31.696224] ================================================================== [ 31.697211] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.698240] Read of size 8 at addr ffff88800f18c968 by task sshd/221 [ 31.699029] [ 31.699257] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.700133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.701145] Call Trace: [ 31.701471] [ 31.701780] dump_stack_lvl+0x91/0xf0 [ 31.702278] print_report+0xcc/0x620 [ 31.702769] ? __virt_addr_valid+0x102/0x340 [ 31.703326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.703963] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.704593] kasan_report+0xbe/0xf0 [ 31.705084] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.705788] vma_interval_tree_remove+0xc75/0xec0 [ 31.706432] vma_prepare+0xc54/0x11a0 [ 31.706932] __split_vma+0x5af/0x950 [ 31.707442] ? __pfx___split_vma+0x10/0x10 [ 31.708031] ? find_held_lock+0x2c/0x110 [ 31.708594] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.709209] ? lock_is_held_type+0x9f/0x120 [ 31.709811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.710463] ? mtree_range_walk+0x632/0x900 [ 31.711053] ? mas_walk+0x5c7/0x7c0 [ 31.711565] do_vmi_munmap+0x1f1/0x2b0 [ 31.712094] mmap_region+0x1f9/0x2660 [ 31.712615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.713139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.713870] ? __pfx_lock_acquire+0x10/0x10 [ 31.714411] ? __pfx_mmap_region+0x10/0x10 [ 31.714944] ? security_mmap_addr+0x7d/0xa0 [ 31.715474] ? get_unmapped_area+0x1f5/0x3f0 [ 31.716023] do_mmap+0x854/0xf00 [ 31.716464] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.716968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.717532] ksys_mmap_pgoff+0x3af/0x500 [ 31.718062] do_syscall_64+0x3f/0x90 [ 31.718543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.719195] RIP: 0033:0x7f1f409d3d82 [ 31.719651] 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 [ 31.721805] RSP: 002b:00007fffcdf30fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.722720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f409d3d82 [ 31.723565] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f3fe0d000 [ 31.724418] RBP: 00007f1f3fe0d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.725259] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557611f74f70 [ 31.726111] R13: 00007fffcdf30fd0 R14: 00007fffcdf31000 R15: 00007fffcdf31360 [ 31.726973] [ 31.727265] [ 31.727481] Allocated by task 214: [ 31.727909] kasan_save_stack+0x22/0x50 [ 31.728414] kasan_set_track+0x25/0x30 [ 31.728912] __kasan_slab_alloc+0x59/0x70 [ 31.729436] kmem_cache_alloc+0x16b/0x370 [ 31.729972] vm_area_dup+0x20/0x160 [ 31.730436] __split_vma+0x170/0x950 [ 31.730906] split_vma+0xc6/0x110 [ 31.731343] mprotect_fixup+0x8d2/0xb30 [ 31.731849] do_mprotect_pkey+0x87e/0xd40 [ 31.732371] __x64_sys_mprotect+0x78/0xc0 [ 31.732900] do_syscall_64+0x3f/0x90 [ 31.733383] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.734028] [ 31.734242] Freed by task 19: [ 31.734627] kasan_save_stack+0x22/0x50 [ 31.735135] kasan_set_track+0x25/0x30 [ 31.735633] kasan_save_free_info+0x2b/0x50 [ 31.736173] __kasan_slab_free+0x10a/0x190 [ 31.736715] kmem_cache_free+0x10d/0x4d0 [ 31.737228] rcu_core+0x8c8/0x2860 [ 31.737669] __do_softirq+0x1b7/0x7d4 [ 31.738167] [ 31.738381] Last potentially related work creation: [ 31.738963] kasan_save_stack+0x22/0x50 [ 31.739464] __kasan_record_aux_stack+0x8e/0xa0 [ 31.740051] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.740694] remove_vma+0x139/0x170 [ 31.741147] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.741701] do_vmi_munmap+0x1f1/0x2b0 [ 31.742209] __vm_munmap+0x138/0x3a0 [ 31.742680] __x64_sys_munmap+0x59/0x80 [ 31.743185] do_syscall_64+0x3f/0x90 [ 31.743664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.744314] [ 31.744532] The buggy address belongs to the object at ffff88800f18c910 [ 31.744532] which belongs to the cache vm_area_struct of size 168 [ 31.746009] The buggy address is located 88 bytes inside of [ 31.746009] freed 168-byte region [ffff88800f18c910, ffff88800f18c9b8) [ 31.747414] [ 31.747630] The buggy address belongs to the physical page: [ 31.748292] page:000000009b6eb8eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf18c [ 31.749370] memcg:ffff88800d0b0001 [ 31.749807] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.750457] page_type: 0xffffffff() [ 31.750906] raw: 0100000000000200 ffff88800879fc80 ffffea0000377bc0 dead000000000008 [ 31.751830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0b0001 [ 31.752730] page dumped because: kasan: bad access detected [ 31.753391] [ 31.753607] Memory state around the buggy address: [ 31.754189] ffff88800f18c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.755053] ffff88800f18c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.755916] >ffff88800f18c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.756765] ^ [ 31.757554] ffff88800f18c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.758427] ffff88800f18ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.759280] ================================================================== [ 31.760319] Disabling lock debugging due to kernel taint [ 33.538805] BUG: Bad rss-counter state mm:000000007564c3e2 type:MM_FILEPAGES val:33 [ 33.539676] BUG: Bad rss-counter state mm:000000007564c3e2 type:MM_ANONPAGES val:22 [ 34.082895] BUG: Bad rss-counter state mm:00000000b47989ea type:MM_FILEPAGES val:33 [ 34.084094] BUG: Bad rss-counter state mm:00000000b47989ea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51114' (ECDSA) to the list of known hosts. 2023/06/19 12:45:56 fuzzer started 2023/06/19 12:45:56 dialing manager at localhost:44161 2023/06/19 12:45:56 checking machine... 2023/06/19 12:45:56 checking revisions... [ 34.736730] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:45:56 testing simple program... [ 34.794301] cgroup: Unknown subsys name 'net' [ 34.842540] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:45:55 Registers: info registers vcpu 0 RAX=1ffff1100197c393 RBX=ffff88800cbe1c00 RCX=0000000000000000 RDX=ffff888010183680 RSI=ffffffff814d4559 RDI=ffff88800cbe1c98 RBP=000000007fff0000 RSP=ffff88800da8fde8 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff88800da8fe30 R15=ffffc90000687000 RIP=ffffffff814d4579 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 00007f064d3c6900 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=00007f064c84b9a0 CR3=000000000c82e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=cad3625395d2dded00000000000ae988 XMM05=7b271cac48047c3800000000001358d0 XMM06=c291bd5c70af25b900000000001346c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffff88801969b680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff88801969ba74 RBP=ffff88801969b680 RSP=ffff88801c5e75f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88801969b680 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000dc0 RIP=ffffffff8137455a RFL=00000202 [-------] 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 00007fe710b56900 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=00007ffe7e37b000 CR3=000000000f06a000 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=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