[ 23.741493] BUG: Bad rss-counter state mm:000000001a48eb0a type:MM_FILEPAGES val:33 [ 23.742793] BUG: Bad rss-counter state mm:000000001a48eb0a type:MM_ANONPAGES val:22 [ 23.891864] ================================================================== [ 23.892907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.893875] Read of size 8 at addr ffff88800e026880 by task sshd/219 [ 23.894738] [ 23.894966] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.895840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.896857] Call Trace: [ 23.897190] [ 23.897484] dump_stack_lvl+0x91/0xf0 [ 23.897978] print_report+0xcc/0x620 [ 23.898462] ? __virt_addr_valid+0x102/0x340 [ 23.899019] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.899679] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.900346] kasan_report+0xbe/0xf0 [ 23.900845] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.901494] vma_interval_tree_remove+0xc75/0xec0 [ 23.902113] vma_prepare+0xc54/0x11a0 [ 23.902608] __split_vma+0x5af/0x950 [ 23.903105] ? __pfx___split_vma+0x10/0x10 [ 23.903655] ? find_held_lock+0x2c/0x110 [ 23.904204] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.904802] ? lock_is_held_type+0x9f/0x120 [ 23.905366] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.906004] ? mtree_range_walk+0x632/0x900 [ 23.906589] ? mas_walk+0x5c7/0x7c0 [ 23.907084] do_vmi_munmap+0x1f1/0x2b0 [ 23.907577] mmap_region+0x1f9/0x2660 [ 23.908057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.908594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.909314] ? __pfx_lock_acquire+0x10/0x10 [ 23.909879] ? __pfx_mmap_region+0x10/0x10 [ 23.910413] ? security_mmap_addr+0x7d/0xa0 [ 23.910943] ? get_unmapped_area+0x1f5/0x3f0 [ 23.911494] do_mmap+0x854/0xf00 [ 23.911939] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.912464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.913033] ksys_mmap_pgoff+0x3af/0x500 [ 23.913551] do_syscall_64+0x3f/0x90 [ 23.914027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.914685] RIP: 0033:0x7f30ff3bfd82 [ 23.915145] 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 [ 23.917321] RSP: 002b:00007ffef1a5ae98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.918230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30ff3bfd82 [ 23.919081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30fe7f9000 [ 23.919926] RBP: 00007f30fe7f9000 R08: 0000000000000009 R09: 0000000000001000 [ 23.920832] R10: 0000000000000812 R11: 0000000000000206 R12: 00005608ef5c9ec0 [ 23.921672] R13: 00007ffef1a5aeb0 R14: 00007ffef1a5aee0 R15: 00007ffef1a5b240 [ 23.922534] [ 23.922867] [ 23.923094] Allocated by task 212: [ 23.923547] kasan_save_stack+0x22/0x50 [ 23.924085] kasan_set_track+0x25/0x30 [ 23.924604] __kasan_slab_alloc+0x59/0x70 [ 23.925140] kmem_cache_alloc+0x16b/0x370 [ 23.925679] vm_area_dup+0x20/0x160 [ 23.926141] __split_vma+0x170/0x950 [ 23.926605] split_vma+0xc6/0x110 [ 23.927048] mprotect_fixup+0x8d2/0xb30 [ 23.927559] do_mprotect_pkey+0x87e/0xd40 [ 23.928084] __x64_sys_mprotect+0x78/0xc0 [ 23.928637] do_syscall_64+0x3f/0x90 [ 23.929125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.929787] [ 23.930017] Freed by task 212: [ 23.930429] kasan_save_stack+0x22/0x50 [ 23.930952] kasan_set_track+0x25/0x30 [ 23.931455] kasan_save_free_info+0x2b/0x50 [ 23.931986] __kasan_slab_free+0x10a/0x190 [ 23.932532] kmem_cache_free+0x10d/0x4d0 [ 23.933044] rcu_core+0x8c8/0x2860 [ 23.933486] __do_softirq+0x1b7/0x7d4 [ 23.933963] [ 23.934178] Last potentially related work creation: [ 23.934764] kasan_save_stack+0x22/0x50 [ 23.935263] __kasan_record_aux_stack+0x8e/0xa0 [ 23.935844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.936512] remove_vma+0x139/0x170 [ 23.936972] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.937560] do_vmi_munmap+0x1f1/0x2b0 [ 23.938067] __vm_munmap+0x138/0x3a0 [ 23.938548] __x64_sys_munmap+0x59/0x80 [ 23.939049] do_syscall_64+0x3f/0x90 [ 23.939527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.940219] [ 23.940457] The buggy address belongs to the object at ffff88800e026828 [ 23.940457] which belongs to the cache vm_area_struct of size 168 [ 23.941963] The buggy address is located 88 bytes inside of [ 23.941963] freed 168-byte region [ffff88800e026828, ffff88800e0268d0) [ 23.943399] [ 23.943616] The buggy address belongs to the physical page: [ 23.944291] page:000000005631d83f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe026 [ 23.945392] memcg:ffff8880094b9c01 [ 23.945831] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.946499] page_type: 0xffffffff() [ 23.946969] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.947943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094b9c01 [ 23.948902] page dumped because: kasan: bad access detected [ 23.949593] [ 23.949816] Memory state around the buggy address: [ 23.950417] ffff88800e026780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.951304] ffff88800e026800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 23.952186] >ffff88800e026880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 23.953078] ^ [ 23.953514] ffff88800e026900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.954421] ffff88800e026980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 23.955310] ================================================================== [ 23.956350] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.982107] BUG: Bad rss-counter state mm:000000004281d872 type:MM_FILEPAGES val:33 [ 25.983272] BUG: Bad rss-counter state mm:000000004281d872 type:MM_ANONPAGES val:22 [ 26.436708] BUG: Bad rss-counter state mm:000000009aae2a64 type:MM_FILEPAGES val:33 [ 26.437901] BUG: Bad rss-counter state mm:000000009aae2a64 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1076' (ECDSA) to the list of known hosts. 2023/06/20 12:05:44 fuzzer started 2023/06/20 12:05:44 dialing manager at localhost:36067 2023/06/20 12:05:44 checking machine... 2023/06/20 12:05:44 checking revisions... [ 27.152365] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:05:45 testing simple program... [ 27.201826] cgroup: Unknown subsys name 'net' [ 27.242061] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:05:44 Registers: info registers vcpu 0 RAX=ffffffff864bf1b9 RBX=0000000000000001 RCX=ffffffff864bf1b4 RDX=0000000000000000 RSI=1ffffffff0c97e37 RDI=ffffffff85d7a9c4 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130a5b RFL=00000212 [----A--] 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 0000000000000000 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=00007fd68ec931d0 CR3=000000000e05c000 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=2034343a35303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a35303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019509b40 RSI=ffffffff814c8575 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880165e7638 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000000000 RIP=ffffffff812d8654 RFL=00000293 [--S-A-C] 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 00007f7edab5a900 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=00007f7edab39020 CR3=000000000c670000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000