[ 23.784790] BUG: Bad rss-counter state mm:000000009d95de51 type:MM_FILEPAGES val:33 [ 23.785313] BUG: Bad rss-counter state mm:000000009d95de51 type:MM_ANONPAGES val:22 [ 23.889770] ================================================================== [ 23.890835] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.891936] Read of size 8 at addr ffff88800d552b38 by task sshd/219 [ 23.892856] [ 23.893239] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.894258] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.895081] Call Trace: [ 23.895243] [ 23.895399] dump_stack_lvl+0x91/0xf0 [ 23.895650] print_report+0xcc/0x620 [ 23.895894] ? __virt_addr_valid+0x102/0x340 [ 23.896172] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.896484] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.896795] kasan_report+0xbe/0xf0 [ 23.897040] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.897353] vma_interval_tree_remove+0xc75/0xec0 [ 23.897656] vma_prepare+0xc54/0x11a0 [ 23.897898] __split_vma+0x5af/0x950 [ 23.898137] ? __pfx___split_vma+0x10/0x10 [ 23.898412] ? find_held_lock+0x2c/0x110 [ 23.898675] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.898960] ? lock_is_held_type+0x9f/0x120 [ 23.899232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.899539] ? mtree_range_walk+0x632/0x900 [ 23.899819] ? mas_walk+0x5c7/0x7c0 [ 23.900063] do_vmi_munmap+0x1f1/0x2b0 [ 23.900314] mmap_region+0x1f9/0x2660 [ 23.900561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.900821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.901184] ? __pfx_lock_acquire+0x10/0x10 [ 23.901456] ? __pfx_mmap_region+0x10/0x10 [ 23.901727] ? security_mmap_addr+0x7d/0xa0 [ 23.901999] ? get_unmapped_area+0x1f5/0x3f0 [ 23.902285] do_mmap+0x854/0xf00 [ 23.902514] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.902768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.903055] ksys_mmap_pgoff+0x3af/0x500 [ 23.903316] do_syscall_64+0x3f/0x90 [ 23.903563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.903894] RIP: 0033:0x7f616a4fad82 [ 23.904129] 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 [ 23.905208] RSP: 002b:00007ffc42f8bfc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.905669] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f616a4fad82 [ 23.906099] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6169934000 [ 23.906541] RBP: 00007f6169934000 R08: 0000000000000009 R09: 0000000000001000 [ 23.906971] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c00c961ec0 [ 23.907401] R13: 00007ffc42f8bfe0 R14: 00007ffc42f8c010 R15: 00007ffc42f8c370 [ 23.907839] [ 23.907991] [ 23.908103] Allocated by task 212: [ 23.908323] kasan_save_stack+0x22/0x50 [ 23.908581] kasan_set_track+0x25/0x30 [ 23.908831] __kasan_slab_alloc+0x59/0x70 [ 23.909098] kmem_cache_alloc+0x16b/0x370 [ 23.909361] vm_area_dup+0x20/0x160 [ 23.909594] __split_vma+0x170/0x950 [ 23.909836] split_vma+0xc6/0x110 [ 23.910060] mprotect_fixup+0x8d2/0xb30 [ 23.910325] do_mprotect_pkey+0x87e/0xd40 [ 23.910589] __x64_sys_mprotect+0x78/0xc0 [ 23.910856] do_syscall_64+0x3f/0x90 [ 23.911098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.911426] [ 23.911538] Freed by task 19: [ 23.911733] kasan_save_stack+0x22/0x50 [ 23.911991] kasan_set_track+0x25/0x30 [ 23.912243] kasan_save_free_info+0x2b/0x50 [ 23.912514] __kasan_slab_free+0x10a/0x190 [ 23.912784] kmem_cache_free+0x10d/0x4d0 [ 23.913050] rcu_core+0x8c8/0x2860 [ 23.913276] __do_softirq+0x1b7/0x7d4 [ 23.913520] [ 23.913629] Last potentially related work creation: [ 23.913928] kasan_save_stack+0x22/0x50 [ 23.914185] __kasan_record_aux_stack+0x8e/0xa0 [ 23.914484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.914812] remove_vma+0x139/0x170 [ 23.915039] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.915322] do_vmi_munmap+0x1f1/0x2b0 [ 23.915569] __vm_munmap+0x138/0x3a0 [ 23.915807] __x64_sys_munmap+0x59/0x80 [ 23.916061] do_syscall_64+0x3f/0x90 [ 23.916302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.916631] [ 23.916741] The buggy address belongs to the object at ffff88800d552ae0 [ 23.916741] which belongs to the cache vm_area_struct of size 168 [ 23.917478] The buggy address is located 88 bytes inside of [ 23.917478] freed 168-byte region [ffff88800d552ae0, ffff88800d552b88) [ 23.918183] [ 23.918306] The buggy address belongs to the physical page: [ 23.918641] page:00000000937f7ce3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd552 [ 23.919189] memcg:ffff88800f35ec01 [ 23.919407] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.919763] page_type: 0xffffffff() [ 23.919992] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 23.920455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f35ec01 [ 23.920919] page dumped because: kasan: bad access detected [ 23.921252] [ 23.921362] Memory state around the buggy address: [ 23.921656] ffff88800d552a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.922086] ffff88800d552a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 23.922526] >ffff88800d552b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.922963] ^ [ 23.923273] ffff88800d552b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 23.923704] ffff88800d552c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 23.924134] ================================================================== [ 23.924655] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.967281] BUG: Bad rss-counter state mm:000000009effa4c7 type:MM_FILEPAGES val:33 [ 25.968430] BUG: Bad rss-counter state mm:000000009effa4c7 type:MM_ANONPAGES val:22 [ 26.450931] BUG: Bad rss-counter state mm:000000003ee02ea3 type:MM_FILEPAGES val:33 [ 26.451939] BUG: Bad rss-counter state mm:000000003ee02ea3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10517' (ECDSA) to the list of known hosts. 2023/06/21 05:16:00 fuzzer started 2023/06/21 05:16:01 dialing manager at localhost:36067 2023/06/21 05:16:01 checking machine... 2023/06/21 05:16:01 checking revisions... [ 27.105088] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:16:01 testing simple program... [ 27.148970] cgroup: Unknown subsys name 'net' [ 27.189066] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:16:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880088d9b80 RCX=0000000000000000 RDX=ffff888015818000 RSI=ffffffff844f4031 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff88801580f8b0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801580f928 R13=0000000000000000 R14=ffff888015828000 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000082 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4952b5d900 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=00007f4951fc2710 CR3=000000000c95c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=aa40edfba80e029f00000000000ae988 XMM05=b108f3b7b92eeac90000000000133580 XMM06=806171799158d96700000000001322b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fca27797301 RCX=ffffffff813a0b19 RDX=ffff8880189f9b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88800c4e76d0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff8880189f9b40 R15=0000000000000cc0 RIP=ffffffff814c0860 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 00007fca272a4900 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=00007fca2785b618 CR3=000000000ce56000 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=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