syzkaller login: [ 33.356277] BUG: Bad rss-counter state mm:00000000582317ad type:MM_FILEPAGES val:33 [ 33.357642] BUG: Bad rss-counter state mm:00000000582317ad type:MM_ANONPAGES val:22 [ 33.533608] ================================================================== [ 33.534557] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.535527] Read of size 8 at addr ffff88801a30db38 by task sshd/220 [ 33.536330] [ 33.536685] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.537584] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.538580] Call Trace: [ 33.538939] [ 33.539231] dump_stack_lvl+0x91/0xf0 [ 33.539763] print_report+0xcc/0x620 [ 33.540261] ? __virt_addr_valid+0x102/0x340 [ 33.540837] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.541470] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.542130] kasan_report+0xbe/0xf0 [ 33.542611] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.543245] vma_interval_tree_remove+0xc75/0xec0 [ 33.543861] vma_prepare+0xc54/0x11a0 [ 33.544348] __split_vma+0x5af/0x950 [ 33.544840] ? __pfx___split_vma+0x10/0x10 [ 33.545374] ? find_held_lock+0x2c/0x110 [ 33.545941] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.546502] ? lock_is_held_type+0x9f/0x120 [ 33.547059] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.547676] ? mtree_range_walk+0x632/0x900 [ 33.548237] ? mas_walk+0x5c7/0x7c0 [ 33.548731] do_vmi_munmap+0x1f1/0x2b0 [ 33.549222] mmap_region+0x1f9/0x2660 [ 33.549730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.550245] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.550984] ? __pfx_lock_acquire+0x10/0x10 [ 33.551513] ? __pfx_mmap_region+0x10/0x10 [ 33.552076] ? security_mmap_addr+0x7d/0xa0 [ 33.552616] ? get_unmapped_area+0x1f5/0x3f0 [ 33.553197] do_mmap+0x854/0xf00 [ 33.553667] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.554169] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.554740] ksys_mmap_pgoff+0x3af/0x500 [ 33.555247] do_syscall_64+0x3f/0x90 [ 33.555748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.556400] RIP: 0033:0x7f91b1a06d82 [ 33.556876] 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 [ 33.559056] RSP: 002b:00007ffd50d81fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.559977] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91b1a06d82 [ 33.560851] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91b0e40000 [ 33.561732] RBP: 00007f91b0e40000 R08: 0000000000000009 R09: 0000000000001000 [ 33.562589] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589ff6c3d90 [ 33.563451] R13: 00007ffd50d81fc0 R14: 00007ffd50d81ff0 R15: 00007ffd50d82350 [ 33.564322] [ 33.564616] [ 33.564848] Allocated by task 213: [ 33.565286] kasan_save_stack+0x22/0x50 [ 33.565837] kasan_set_track+0x25/0x30 [ 33.566339] __kasan_slab_alloc+0x59/0x70 [ 33.566879] kmem_cache_alloc+0x16b/0x370 [ 33.567405] vm_area_dup+0x20/0x160 [ 33.567880] __split_vma+0x170/0x950 [ 33.568353] split_vma+0xc6/0x110 [ 33.568811] mprotect_fixup+0x8d2/0xb30 [ 33.569319] do_mprotect_pkey+0x87e/0xd40 [ 33.569970] __x64_sys_mprotect+0x78/0xc0 [ 33.570680] do_syscall_64+0x3f/0x90 [ 33.571327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.572198] [ 33.572487] Freed by task 213: [ 33.573008] kasan_save_stack+0x22/0x50 [ 33.573696] kasan_set_track+0x25/0x30 [ 33.574354] kasan_save_free_info+0x2b/0x50 [ 33.575021] __kasan_slab_free+0x10a/0x190 [ 33.575563] kmem_cache_free+0x10d/0x4d0 [ 33.576095] rcu_core+0x8c8/0x2860 [ 33.576547] __do_softirq+0x1b7/0x7d4 [ 33.577036] [ 33.577252] Last potentially related work creation: [ 33.577862] kasan_save_stack+0x22/0x50 [ 33.578368] __kasan_record_aux_stack+0x8e/0xa0 [ 33.578960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.579610] remove_vma+0x139/0x170 [ 33.580079] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.580639] do_vmi_munmap+0x1f1/0x2b0 [ 33.581147] __vm_munmap+0x138/0x3a0 [ 33.581630] __x64_sys_munmap+0x59/0x80 [ 33.582148] do_syscall_64+0x3f/0x90 [ 33.582627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.583295] [ 33.583510] The buggy address belongs to the object at ffff88801a30dae0 [ 33.583510] which belongs to the cache vm_area_struct of size 168 [ 33.585002] The buggy address is located 88 bytes inside of [ 33.585002] freed 168-byte region [ffff88801a30dae0, ffff88801a30db88) [ 33.586457] [ 33.586686] The buggy address belongs to the physical page: [ 33.587341] page:0000000095b7dc46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a30d [ 33.588438] memcg:ffff88800d38b701 [ 33.588876] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.589530] page_type: 0xffffffff() [ 33.590012] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.590934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d38b701 [ 33.591862] page dumped because: kasan: bad access detected [ 33.592529] [ 33.592771] Memory state around the buggy address: [ 33.593356] ffff88801a30da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.594257] ffff88801a30da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 33.595140] >ffff88801a30db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.596032] ^ [ 33.596674] ffff88801a30db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.597556] ffff88801a30dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.598441] ================================================================== [ 33.599714] Disabling lock debugging due to kernel taint [ 35.334422] BUG: Bad rss-counter state mm:000000000e1b492a type:MM_FILEPAGES val:33 [ 35.335029] BUG: Bad rss-counter state mm:000000000e1b492a type:MM_ANONPAGES val:22 [ 35.789221] BUG: Bad rss-counter state mm:0000000084f322cd type:MM_FILEPAGES val:33 [ 35.790449] BUG: Bad rss-counter state mm:0000000084f322cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64575' (ECDSA) to the list of known hosts. 2023/06/20 09:40:51 fuzzer started 2023/06/20 09:40:52 dialing manager at localhost:44161 2023/06/20 09:40:52 checking machine... 2023/06/20 09:40:52 checking revisions... [ 36.518678] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:40:52 testing simple program... [ 36.557214] cgroup: Unknown subsys name 'net' [ 36.618755] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:40:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8170f51f RDX=ffff88801009b680 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800c6dfd90 RSP=ffff88800c6dfbf8 R8 =0000000000000007 R9 =0000000000000000 R10=ffffea00006bc540 R11=0000000000000000 R12=ffffea00006bc540 R13=ffff8880167e0ae0 R14=ffff88800c6dfdb8 R15=0000000000000000 RIP=ffffffff814c01fc 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff99bb55900 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=00005620e3565ea4 CR3=000000000c968000 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=000000000000000000005620e2d77060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fa2e838de30 CR3=0000000008ee4000 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=fe178f3c79b7899fad41ab2299351b3a XMM02=2c67c8bc2e329bc3000000000011c8c8 XMM03=fb795ef6d65770560000000000124210 XMM04=27c7b2bac9b5055a00000000000ae988 XMM05=19e9129bd510f2350000000000133da8 XMM06=601c54f354b192c20000000000132c10 XMM07=e042d86d42eb936e0000000000124490 XMM08=ad7dd20ebcb60c1f000000000011c928 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000