[ 32.376254] BUG: Bad rss-counter state mm:00000000c0ce20b1 type:MM_FILEPAGES val:33 [ 32.377464] BUG: Bad rss-counter state mm:00000000c0ce20b1 type:MM_ANONPAGES val:22 [ 32.520471] ================================================================== [ 32.521385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.522345] Read of size 8 at addr ffff88800f1423f8 by task sshd/218 [ 32.523294] [ 32.523515] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.524382] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.525553] Call Trace: [ 32.525939] [ 32.526283] dump_stack_lvl+0x91/0xf0 [ 32.526867] print_report+0xcc/0x620 [ 32.527437] ? __virt_addr_valid+0x102/0x340 [ 32.528104] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.528838] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.529586] kasan_report+0xbe/0xf0 [ 32.530155] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.530918] vma_interval_tree_remove+0xc75/0xec0 [ 32.531658] vma_prepare+0xc54/0x11a0 [ 32.532250] __split_vma+0x5af/0x950 [ 32.532826] ? __pfx___split_vma+0x10/0x10 [ 32.533495] ? find_held_lock+0x2c/0x110 [ 32.534116] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.534682] ? lock_is_held_type+0x9f/0x120 [ 32.535219] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.535836] ? mtree_range_walk+0x632/0x900 [ 32.536381] ? mas_walk+0x5c7/0x7c0 [ 32.536851] do_vmi_munmap+0x1f1/0x2b0 [ 32.537360] mmap_region+0x1f9/0x2660 [ 32.537846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.538354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.539056] ? __pfx_lock_acquire+0x10/0x10 [ 32.539587] ? __pfx_mmap_region+0x10/0x10 [ 32.540113] ? security_mmap_addr+0x7d/0xa0 [ 32.540649] ? get_unmapped_area+0x1f5/0x3f0 [ 32.541211] do_mmap+0x854/0xf00 [ 32.541647] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.542144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.542706] ksys_mmap_pgoff+0x3af/0x500 [ 32.543208] do_syscall_64+0x3f/0x90 [ 32.543688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.544336] RIP: 0033:0x7f1005cded82 [ 32.544794] 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 [ 32.546958] RSP: 002b:00007ffd4869f488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.547864] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1005cded82 [ 32.548711] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1005118000 [ 32.549567] RBP: 00007f1005118000 R08: 0000000000000009 R09: 0000000000001000 [ 32.550420] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddeda0ab20 [ 32.551277] R13: 00007ffd4869f4a0 R14: 00007ffd4869f4d0 R15: 00007ffd4869f830 [ 32.552136] [ 32.552431] [ 32.552644] Allocated by task 210: [ 32.553080] kasan_save_stack+0x22/0x50 [ 32.553578] kasan_set_track+0x25/0x30 [ 32.554071] __kasan_slab_alloc+0x59/0x70 [ 32.554599] kmem_cache_alloc+0x16b/0x370 [ 32.555120] vm_area_dup+0x20/0x160 [ 32.555570] __split_vma+0x170/0x950 [ 32.556036] split_vma+0xc6/0x110 [ 32.556472] mprotect_fixup+0x8d2/0xb30 [ 32.556971] do_mprotect_pkey+0x87e/0xd40 [ 32.557509] __x64_sys_mprotect+0x78/0xc0 [ 32.558036] do_syscall_64+0x3f/0x90 [ 32.558511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.559153] [ 32.559366] Freed by task 19: [ 32.559746] kasan_save_stack+0x22/0x50 [ 32.560247] kasan_set_track+0x25/0x30 [ 32.560736] kasan_save_free_info+0x2b/0x50 [ 32.561272] __kasan_slab_free+0x10a/0x190 [ 32.561812] kmem_cache_free+0x10d/0x4d0 [ 32.562313] rcu_core+0x8c8/0x2860 [ 32.562756] __do_softirq+0x1b7/0x7d4 [ 32.563231] [ 32.563444] Last potentially related work creation: [ 32.564104] kasan_save_stack+0x22/0x50 [ 32.564612] __kasan_record_aux_stack+0x8e/0xa0 [ 32.565209] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.565851] remove_vma+0x139/0x170 [ 32.566300] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.566855] do_vmi_munmap+0x1f1/0x2b0 [ 32.567344] __vm_munmap+0x138/0x3a0 [ 32.567810] __x64_sys_munmap+0x59/0x80 [ 32.568307] do_syscall_64+0x3f/0x90 [ 32.568784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.569427] [ 32.569645] Second to last potentially related work creation: [ 32.570326] kasan_save_stack+0x22/0x50 [ 32.570826] __kasan_record_aux_stack+0x8e/0xa0 [ 32.571395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.572056] remove_vma+0x139/0x170 [ 32.572510] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.573071] do_vmi_munmap+0x1f1/0x2b0 [ 32.573557] mmap_region+0x1f9/0x2660 [ 32.574036] do_mmap+0x854/0xf00 [ 32.574472] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.574963] ksys_mmap_pgoff+0x3af/0x500 [ 32.575473] do_syscall_64+0x3f/0x90 [ 32.575953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.576592] [ 32.576809] The buggy address belongs to the object at ffff88800f1423a0 [ 32.576809] which belongs to the cache vm_area_struct of size 168 [ 32.578319] The buggy address is located 88 bytes inside of [ 32.578319] freed 168-byte region [ffff88800f1423a0, ffff88800f142448) [ 32.579731] [ 32.579948] The buggy address belongs to the physical page: [ 32.580612] page:00000000f97c48c6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf142 [ 32.581696] memcg:ffff888015c2af01 [ 32.582122] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.582771] page_type: 0xffffffff() [ 32.583224] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a6980 dead000000000002 [ 32.584156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c2af01 [ 32.585084] page dumped because: kasan: bad access detected [ 32.585748] [ 32.585962] Memory state around the buggy address: [ 32.586535] ffff88800f142280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.587393] ffff88800f142300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.588251] >ffff88800f142380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.589109] ^ [ 32.589958] ffff88800f142400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.590819] ffff88800f142480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.591677] ================================================================== [ 32.592606] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.565196] BUG: Bad rss-counter state mm:00000000fd93fc99 type:MM_FILEPAGES val:33 [ 34.566380] BUG: Bad rss-counter state mm:00000000fd93fc99 type:MM_ANONPAGES val:22 [ 35.022326] BUG: Bad rss-counter state mm:0000000099a132c1 type:MM_FILEPAGES val:33 [ 35.023326] BUG: Bad rss-counter state mm:0000000099a132c1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17747' (ECDSA) to the list of known hosts. 2023/06/20 19:15:52 fuzzer started 2023/06/20 19:15:52 dialing manager at localhost:36067 2023/06/20 19:15:52 checking machine... 2023/06/20 19:15:52 checking revisions... [ 35.669815] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:15:52 testing simple program... [ 35.713197] cgroup: Unknown subsys name 'net' [ 35.755134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:15:51 Registers: info registers vcpu 0 RAX=ffffffff864b202d RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800c51f7f8 RSP=ffff88800c51f730 R8 =ffffffff864b2030 R9 =ffff88800c51f7e0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800c51f800 R13=ffff88800c51f7e8 R14=ffff88800c51ff48 R15=ffff88800c51f7a0 RIP=ffffffff81131767 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 00007f0d82222900 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=00007ffef4558000 CR3=000000000edd2000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 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=00007f916d6fb640 CR3=000000000d762000 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=112fb390374a33bea744db8145f6902a XMM02=000000000011b7f0eff9b2d0a8fce9cb XMM03=000000000011b8c02c67c8bc2e329bc3 XMM04=4bf3623d8ddc02e300000000000ae988 XMM05=751b9502027dc0b90000000000133130 XMM06=ad7f5321715006390000000000132308 XMM07=e042d86d42eb936e00000000001224a0 XMM08=5a2c14c5d509c7a6000000000011b8c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000