[ 31.529016] BUG: Bad rss-counter state mm:000000003f7b50be type:MM_FILEPAGES val:33 [ 31.529999] BUG: Bad rss-counter state mm:000000003f7b50be type:MM_ANONPAGES val:22 [ 31.638487] ================================================================== [ 31.639214] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.639859] Read of size 8 at addr ffff88800deeeb38 by task sshd/220 [ 31.640358] [ 31.640509] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.641062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.641778] Call Trace: [ 31.642024] [ 31.642208] dump_stack_lvl+0x91/0xf0 [ 31.642680] print_report+0xcc/0x620 [ 31.643062] ? __virt_addr_valid+0x102/0x340 [ 31.643439] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.643857] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.644274] kasan_report+0xbe/0xf0 [ 31.644627] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.645135] vma_interval_tree_remove+0xc75/0xec0 [ 31.645568] vma_prepare+0xc54/0x11a0 [ 31.645923] __split_vma+0x5af/0x950 [ 31.646245] ? __pfx___split_vma+0x10/0x10 [ 31.646624] ? find_held_lock+0x2c/0x110 [ 31.647026] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.647453] ? lock_is_held_type+0x9f/0x120 [ 31.647862] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.648287] ? mtree_range_walk+0x632/0x900 [ 31.648706] ? mas_walk+0x5c7/0x7c0 [ 31.649058] do_vmi_munmap+0x1f1/0x2b0 [ 31.649431] mmap_region+0x1f9/0x2660 [ 31.649792] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.650129] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.650623] ? __pfx_lock_acquire+0x10/0x10 [ 31.650987] ? __pfx_mmap_region+0x10/0x10 [ 31.651337] ? security_mmap_addr+0x7d/0xa0 [ 31.651673] ? get_unmapped_area+0x1f5/0x3f0 [ 31.652049] do_mmap+0x854/0xf00 [ 31.652349] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.652694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.653074] ksys_mmap_pgoff+0x3af/0x500 [ 31.653440] do_syscall_64+0x3f/0x90 [ 31.653754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.654213] RIP: 0033:0x7f686b05ad82 [ 31.654577] 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 [ 31.656015] RSP: 002b:00007ffe0c8fac88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.656633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f686b05ad82 [ 31.657215] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f686a494000 [ 31.657836] RBP: 00007f686a494000 R08: 0000000000000009 R09: 0000000000001000 [ 31.658537] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561823c4f70 [ 31.659172] R13: 00007ffe0c8faca0 R14: 00007ffe0c8facd0 R15: 00007ffe0c8fb030 [ 31.659714] [ 31.659898] [ 31.660034] Allocated by task 213: [ 31.660304] kasan_save_stack+0x22/0x50 [ 31.660620] kasan_set_track+0x25/0x30 [ 31.660924] __kasan_slab_alloc+0x59/0x70 [ 31.661296] kmem_cache_alloc+0x16b/0x370 [ 31.661643] vm_area_dup+0x20/0x160 [ 31.661938] __split_vma+0x170/0x950 [ 31.662239] split_vma+0xc6/0x110 [ 31.662538] mprotect_fixup+0x8d2/0xb30 [ 31.662872] do_mprotect_pkey+0x87e/0xd40 [ 31.663222] __x64_sys_mprotect+0x78/0xc0 [ 31.663561] do_syscall_64+0x3f/0x90 [ 31.663887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.664318] [ 31.664461] Freed by task 213: [ 31.664724] kasan_save_stack+0x22/0x50 [ 31.665051] kasan_set_track+0x25/0x30 [ 31.665411] kasan_save_free_info+0x2b/0x50 [ 31.665754] __kasan_slab_free+0x10a/0x190 [ 31.666086] kmem_cache_free+0x10d/0x4d0 [ 31.666417] rcu_core+0x8c8/0x2860 [ 31.666724] __do_softirq+0x1b7/0x7d4 [ 31.667037] [ 31.667178] Last potentially related work creation: [ 31.667544] kasan_save_stack+0x22/0x50 [ 31.667868] __kasan_record_aux_stack+0x8e/0xa0 [ 31.668222] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.668628] remove_vma+0x139/0x170 [ 31.668924] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.669360] do_vmi_munmap+0x1f1/0x2b0 [ 31.669697] __vm_munmap+0x138/0x3a0 [ 31.670020] __x64_sys_munmap+0x59/0x80 [ 31.670343] do_syscall_64+0x3f/0x90 [ 31.670733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.671170] [ 31.671317] Second to last potentially related work creation: [ 31.671819] kasan_save_stack+0x22/0x50 [ 31.672172] __kasan_record_aux_stack+0x8e/0xa0 [ 31.672552] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.673024] remove_vma+0x139/0x170 [ 31.673355] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.673795] do_vmi_munmap+0x1f1/0x2b0 [ 31.674101] mmap_region+0x1f9/0x2660 [ 31.674399] do_mmap+0x854/0xf00 [ 31.674705] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.675061] ksys_mmap_pgoff+0x3af/0x500 [ 31.675393] do_syscall_64+0x3f/0x90 [ 31.675768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.676190] [ 31.676330] The buggy address belongs to the object at ffff88800deeeae0 [ 31.676330] which belongs to the cache vm_area_struct of size 168 [ 31.677368] The buggy address is located 88 bytes inside of [ 31.677368] freed 168-byte region [ffff88800deeeae0, ffff88800deeeb88) [ 31.678288] [ 31.678436] The buggy address belongs to the physical page: [ 31.678885] page:00000000cf67dcd5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeee [ 31.679616] memcg:ffff888009ce5301 [ 31.679926] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.680411] page_type: 0xffffffff() [ 31.680736] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.681428] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ce5301 [ 31.682073] page dumped because: kasan: bad access detected [ 31.682544] [ 31.682713] Memory state around the buggy address: [ 31.683142] ffff88800deeea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.683744] ffff88800deeea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.684356] >ffff88800deeeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.684996] ^ [ 31.685447] ffff88800deeeb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.686063] ffff88800deeec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.686622] ================================================================== [ 31.687377] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.048134] BUG: Bad rss-counter state mm:000000009dca2623 type:MM_FILEPAGES val:33 [ 33.048937] BUG: Bad rss-counter state mm:000000009dca2623 type:MM_ANONPAGES val:22 [ 33.470433] BUG: Bad rss-counter state mm:000000000cc481fd type:MM_FILEPAGES val:33 [ 33.471205] BUG: Bad rss-counter state mm:000000000cc481fd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62799' (ECDSA) to the list of known hosts. 2023/06/21 09:50:04 fuzzer started 2023/06/21 09:50:04 dialing manager at localhost:36067 2023/06/21 09:50:04 checking machine... 2023/06/21 09:50:04 checking revisions... [ 33.979315] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:50:04 testing simple program... [ 34.013212] cgroup: Unknown subsys name 'net' [ 34.059309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:50:04 Registers: info registers vcpu 0 RAX=1ffff11001da758f RBX=ffff88800ed3ac48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ed3ac78 RBP=ffff88800c544f18 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800c546780 R14=ffffffff8186b835 R15=ffff88800dab9a00 RIP=ffffffff818464e2 RFL=00000046 [---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 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=00007f07ba1dde50 CR3=0000000014592000 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=00000000000000000000000000000000 XMM01=17706e0357c4469098474ddd522438d4 XMM02=000000000011a840ec2efd57dc4c00df XMM03=0000000000121178b7f57ba4617b9946 XMM04=5948887579d6ec6b00000000000ae988 XMM05=b382900b9af30cd00000000000133200 XMM06=4fda316b135da52b0000000000131f30 XMM07=e042d86d42eb936e00000000001213f8 XMM08=b7f57ba4617b9946000000000011a8a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000001e32c RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002e76e75 RSP=ffff8880173b7388 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff856cd6a0 R13=ffffffff81787d2a R14=0000000000000000 R15=ffffffff8184725c RIP=ffffffff8135b973 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 00007f3f56368900 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=00007ffec0be4000 CR3=000000000dbea000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000