[ 23.748954] BUG: Bad rss-counter state mm:00000000ec4cee53 type:MM_FILEPAGES val:33 [ 23.750438] BUG: Bad rss-counter state mm:00000000ec4cee53 type:MM_ANONPAGES val:22 [ 23.904705] ================================================================== [ 23.905806] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.906918] Read of size 8 at addr ffff88800e0f4058 by task sshd/220 [ 23.907689] [ 23.907907] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.908776] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.909761] Call Trace: [ 23.910089] [ 23.910373] dump_stack_lvl+0x91/0xf0 [ 23.910867] print_report+0xcc/0x620 [ 23.911353] ? __virt_addr_valid+0x102/0x340 [ 23.911901] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.912523] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.913141] kasan_report+0xbe/0xf0 [ 23.913626] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.914253] vma_interval_tree_remove+0xc75/0xec0 [ 23.914858] vma_prepare+0xc54/0x11a0 [ 23.915340] __split_vma+0x5af/0x950 [ 23.915811] ? __pfx___split_vma+0x10/0x10 [ 23.916340] ? find_held_lock+0x2c/0x110 [ 23.916859] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.917432] ? lock_is_held_type+0x9f/0x120 [ 23.917991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.918606] ? mtree_range_walk+0x632/0x900 [ 23.919161] ? mas_walk+0x5c7/0x7c0 [ 23.919637] do_vmi_munmap+0x1f1/0x2b0 [ 23.920131] mmap_region+0x1f9/0x2660 [ 23.920617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.921176] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.921921] ? __pfx_lock_acquire+0x10/0x10 [ 23.922451] ? __pfx_mmap_region+0x10/0x10 [ 23.922982] ? security_mmap_addr+0x7d/0xa0 [ 23.923510] ? get_unmapped_area+0x1f5/0x3f0 [ 23.924059] do_mmap+0x854/0xf00 [ 23.924496] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.924990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.925579] ksys_mmap_pgoff+0x3af/0x500 [ 23.926083] do_syscall_64+0x3f/0x90 [ 23.926564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.927207] RIP: 0033:0x7f488cf74d82 [ 23.927660] 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 [ 23.929811] RSP: 002b:00007ffd4ab62bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.930723] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f488cf74d82 [ 23.931585] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f488c3ae000 [ 23.932434] RBP: 00007f488c3ae000 R08: 0000000000000009 R09: 0000000000001000 [ 23.933280] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e4dea37f70 [ 23.934126] R13: 00007ffd4ab62bd0 R14: 00007ffd4ab62c00 R15: 00007ffd4ab62f60 [ 23.934981] [ 23.935276] [ 23.935492] Allocated by task 213: [ 23.935929] kasan_save_stack+0x22/0x50 [ 23.936429] kasan_set_track+0x25/0x30 [ 23.936923] __kasan_slab_alloc+0x59/0x70 [ 23.937443] kmem_cache_alloc+0x16b/0x370 [ 23.937982] vm_area_dup+0x20/0x160 [ 23.938443] __split_vma+0x170/0x950 [ 23.938910] split_vma+0xc6/0x110 [ 23.939357] mprotect_fixup+0x8d2/0xb30 [ 23.939867] do_mprotect_pkey+0x87e/0xd40 [ 23.940387] __x64_sys_mprotect+0x78/0xc0 [ 23.940908] do_syscall_64+0x3f/0x90 [ 23.941385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.942042] [ 23.942257] Freed by task 204: [ 23.942648] kasan_save_stack+0x22/0x50 [ 23.943153] kasan_set_track+0x25/0x30 [ 23.943646] kasan_save_free_info+0x2b/0x50 [ 23.944199] __kasan_slab_free+0x10a/0x190 [ 23.944744] kmem_cache_free+0x10d/0x4d0 [ 23.945251] rcu_core+0x8c8/0x2860 [ 23.945697] __do_softirq+0x1b7/0x7d4 [ 23.946184] [ 23.946401] Last potentially related work creation: [ 23.946982] kasan_save_stack+0x22/0x50 [ 23.947480] __kasan_record_aux_stack+0x8e/0xa0 [ 23.948054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.948724] remove_vma+0x139/0x170 [ 23.949182] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.949766] do_vmi_munmap+0x1f1/0x2b0 [ 23.950254] __vm_munmap+0x138/0x3a0 [ 23.950721] __x64_sys_munmap+0x59/0x80 [ 23.951221] do_syscall_64+0x3f/0x90 [ 23.951695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.952340] [ 23.952559] Second to last potentially related work creation: [ 23.953244] kasan_save_stack+0x22/0x50 [ 23.953753] __kasan_record_aux_stack+0x8e/0xa0 [ 23.954321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.954961] remove_vma+0x139/0x170 [ 23.955407] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.955964] do_vmi_munmap+0x1f1/0x2b0 [ 23.956449] mmap_region+0x1f9/0x2660 [ 23.956926] do_mmap+0x854/0xf00 [ 23.957361] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.957848] ksys_mmap_pgoff+0x7d/0x500 [ 23.958337] do_syscall_64+0x3f/0x90 [ 23.958807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.959456] [ 23.959672] The buggy address belongs to the object at ffff88800e0f4000 [ 23.959672] which belongs to the cache vm_area_struct of size 168 [ 23.961115] The buggy address is located 88 bytes inside of [ 23.961115] freed 168-byte region [ffff88800e0f4000, ffff88800e0f40a8) [ 23.962529] [ 23.962745] The buggy address belongs to the physical page: [ 23.963402] page:000000002446050f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0f4 [ 23.964470] memcg:ffff88800e0a7d01 [ 23.964892] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.965546] page_type: 0xffffffff() [ 23.965993] raw: 0100000000000200 ffff8880087a0c80 ffffea00003df640 dead000000000008 [ 23.966897] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0a7d01 [ 23.967792] page dumped because: kasan: bad access detected [ 23.968455] [ 23.968672] Memory state around the buggy address: [ 23.969259] ffff88800e0f3f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.970125] ffff88800e0f3f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.970978] >ffff88800e0f4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.971824] ^ [ 23.972540] ffff88800e0f4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 23.973395] ffff88800e0f4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.974247] ================================================================== [ 23.975157] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.100798] BUG: Bad rss-counter state mm:00000000d361a018 type:MM_FILEPAGES val:33 [ 26.101999] BUG: Bad rss-counter state mm:00000000d361a018 type:MM_ANONPAGES val:22 [ 26.629074] BUG: Bad rss-counter state mm:00000000730576e4 type:MM_FILEPAGES val:33 [ 26.630299] BUG: Bad rss-counter state mm:00000000730576e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21079' (ECDSA) to the list of known hosts. 2023/06/20 11:01:00 fuzzer started 2023/06/20 11:01:00 dialing manager at localhost:36067 2023/06/20 11:01:00 checking machine... 2023/06/20 11:01:00 checking revisions... [ 27.265923] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:01:01 testing simple program... [ 27.320224] cgroup: Unknown subsys name 'net' [ 27.369572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:01:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000e5 RCX=0000000000000000 RDX=ffff888016d61b40 RSI=ffffffff812119db RDI=ffffffff85ba4d00 RBP=ffff888016ecfd90 RSP=ffff888016ecfc98 R8 =0000000000000001 R9 =fffffbfff0b749a0 R10=ffffffff85ba4d07 R11=00000000000b6a61 R12=0000000000000004 R13=0000000000000001 R14=ffff888019d1b6b8 R15=0000000000000001 RIP=ffffffff8386f8c3 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 00007fad5ff5b900 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=00007fad60512618 CR3=000000000ddae000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007fa24802f910 CR3=000000000c594000 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=abe3412dd47836b8f546d14cf51a6faf XMM02=000000000011a6e0ec2efd57dc4c00df XMM03=000000000012116096e84312081936f4 XMM04=ee8ee32915500aa000000000000ae988 XMM05=19e9129bd510f2350000000000132328 XMM06=4fda316b135da52b00000000001321b0 XMM07=e042d86d42eb936e00000000001213e0 XMM08=96e84312081936f4000000000011a740 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000