[ 24.060359] BUG: Bad rss-counter state mm:00000000c427466f type:MM_FILEPAGES val:33 [ 24.061737] BUG: Bad rss-counter state mm:00000000c427466f type:MM_ANONPAGES val:22 [ 24.247382] ================================================================== [ 24.248347] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.249343] Read of size 8 at addr ffff888019d8fa50 by task sshd/221 [ 24.250165] [ 24.250393] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.251372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.252409] Call Trace: [ 24.252745] [ 24.253056] dump_stack_lvl+0x91/0xf0 [ 24.253564] print_report+0xcc/0x620 [ 24.254066] ? __virt_addr_valid+0x102/0x340 [ 24.254633] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.255274] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.255928] kasan_report+0xbe/0xf0 [ 24.256426] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.257074] vma_interval_tree_remove+0xc75/0xec0 [ 24.257702] vma_prepare+0xc54/0x11a0 [ 24.258200] __split_vma+0x5af/0x950 [ 24.258700] ? __pfx___split_vma+0x10/0x10 [ 24.259252] ? find_held_lock+0x2c/0x110 [ 24.259799] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.260391] ? lock_is_held_type+0x9f/0x120 [ 24.260983] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.261633] ? mtree_range_walk+0x632/0x900 [ 24.262223] ? mas_walk+0x5c7/0x7c0 [ 24.262721] do_vmi_munmap+0x1f1/0x2b0 [ 24.263244] mmap_region+0x1f9/0x2660 [ 24.263750] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.264290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.265045] ? __pfx_lock_acquire+0x10/0x10 [ 24.265601] ? __pfx_mmap_region+0x10/0x10 [ 24.266154] ? security_mmap_addr+0x7d/0xa0 [ 24.266712] ? get_unmapped_area+0x1f5/0x3f0 [ 24.267293] do_mmap+0x854/0xf00 [ 24.267747] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.268274] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.268872] ksys_mmap_pgoff+0x3af/0x500 [ 24.269406] do_syscall_64+0x3f/0x90 [ 24.269901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.270570] RIP: 0033:0x7f36abe0ed82 [ 24.271040] 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 [ 24.273302] RSP: 002b:00007fff94527258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.274251] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36abe0ed82 [ 24.275143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36ab248000 [ 24.276035] RBP: 00007f36ab248000 R08: 0000000000000009 R09: 0000000000001000 [ 24.276942] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612356f0d90 [ 24.277832] R13: 00007fff94527270 R14: 00007fff945272a0 R15: 00007fff94527600 [ 24.278726] [ 24.279029] [ 24.279252] Allocated by task 209: [ 24.279702] kasan_save_stack+0x22/0x50 [ 24.280232] kasan_set_track+0x25/0x30 [ 24.280742] __kasan_slab_alloc+0x59/0x70 [ 24.281304] kmem_cache_alloc+0x16b/0x370 [ 24.281840] vm_area_dup+0x20/0x160 [ 24.282316] __split_vma+0x170/0x950 [ 24.282813] split_vma+0xc6/0x110 [ 24.283277] mprotect_fixup+0x8d2/0xb30 [ 24.283812] do_mprotect_pkey+0x87e/0xd40 [ 24.284367] __x64_sys_mprotect+0x78/0xc0 [ 24.284926] do_syscall_64+0x3f/0x90 [ 24.285429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.286100] [ 24.286324] Freed by task 209: [ 24.286730] kasan_save_stack+0x22/0x50 [ 24.287264] kasan_set_track+0x25/0x30 [ 24.287775] kasan_save_free_info+0x2b/0x50 [ 24.288321] __kasan_slab_free+0x10a/0x190 [ 24.288878] kmem_cache_free+0x10d/0x4d0 [ 24.289411] rcu_core+0x8c8/0x2860 [ 24.289879] __do_softirq+0x1b7/0x7d4 [ 24.290382] [ 24.290603] Last potentially related work creation: [ 24.291223] kasan_save_stack+0x22/0x50 [ 24.291744] __kasan_record_aux_stack+0x8e/0xa0 [ 24.292343] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.293040] remove_vma+0x139/0x170 [ 24.293515] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.294090] do_vmi_munmap+0x1f1/0x2b0 [ 24.294608] __vm_munmap+0x138/0x3a0 [ 24.295107] __x64_sys_munmap+0x59/0x80 [ 24.295638] do_syscall_64+0x3f/0x90 [ 24.296132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.296804] [ 24.297027] The buggy address belongs to the object at ffff888019d8f9f8 [ 24.297027] which belongs to the cache vm_area_struct of size 168 [ 24.298585] The buggy address is located 88 bytes inside of [ 24.298585] freed 168-byte region [ffff888019d8f9f8, ffff888019d8faa0) [ 24.300035] [ 24.300254] The buggy address belongs to the physical page: [ 24.300946] page:000000003383cf3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d8f [ 24.302081] memcg:ffff88800e2f4a01 [ 24.302527] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.303261] page_type: 0xffffffff() [ 24.303723] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.304690] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2f4a01 [ 24.305659] page dumped because: kasan: bad access detected [ 24.306349] [ 24.306569] Memory state around the buggy address: [ 24.307177] ffff888019d8f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.308059] ffff888019d8f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.308968] >ffff888019d8fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.309856] ^ [ 24.310597] ffff888019d8fa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.311502] ffff888019d8fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.312389] ================================================================== [ 24.313489] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.989063] BUG: Bad rss-counter state mm:000000005e832bec type:MM_FILEPAGES val:33 [ 25.989802] BUG: Bad rss-counter state mm:000000005e832bec type:MM_ANONPAGES val:22 [ 26.456426] BUG: Bad rss-counter state mm:000000008cb5611f type:MM_FILEPAGES val:33 [ 26.457587] BUG: Bad rss-counter state mm:000000008cb5611f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27563' (ECDSA) to the list of known hosts. 2023/06/20 22:06:37 fuzzer started 2023/06/20 22:06:37 dialing manager at localhost:36067 2023/06/20 22:06:37 checking machine... 2023/06/20 22:06:37 checking revisions... [ 27.122764] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:06:37 testing simple program... [ 27.169526] cgroup: Unknown subsys name 'net' [ 27.201358] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:06:36 Registers: info registers vcpu 0 RAX=ffffffff864b342b RBX=0000000000000001 RCX=ffffffff864b342a RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff864b342e R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b53d8 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff888016597f30 R15=ffff88806ce09a70 RIP=ffffffff81130b8f 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 00007fa9daaf5900 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=00007ffcb94c2000 CR3=000000000e98c000 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=6720646572637465733a4d41503d706f 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 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=0000000000000001 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=00007f2fcf365c50 CR3=000000000cb70000 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=2036333a36303a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a36303a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000