syzkaller login: [ 30.435240] BUG: Bad rss-counter state mm:00000000280c5881 type:MM_FILEPAGES val:33 [ 30.435937] BUG: Bad rss-counter state mm:00000000280c5881 type:MM_ANONPAGES val:22 [ 30.468239] ================================================================== [ 30.468811] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.469395] Read of size 8 at addr ffff88800f1a6ed8 by task sshd/221 [ 30.469869] [ 30.470008] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.470543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.471320] Call Trace: [ 30.471526] [ 30.471723] dump_stack_lvl+0x91/0xf0 [ 30.472047] print_report+0xcc/0x620 [ 30.472359] ? __virt_addr_valid+0x102/0x340 [ 30.472711] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.473103] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.473496] kasan_report+0xbe/0xf0 [ 30.473803] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.474200] vma_interval_tree_remove+0xc75/0xec0 [ 30.474583] vma_prepare+0xc54/0x11a0 [ 30.474887] __split_vma+0x5af/0x950 [ 30.475775] ? __pfx___split_vma+0x10/0x10 [ 30.476140] ? find_held_lock+0x2c/0x110 [ 30.476562] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.476927] ? lock_is_held_type+0x9f/0x120 [ 30.477275] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.477716] ? mtree_range_walk+0x632/0x900 [ 30.478077] ? mas_walk+0x5c7/0x7c0 [ 30.478386] do_vmi_munmap+0x1f1/0x2b0 [ 30.478782] mmap_region+0x1f9/0x2660 [ 30.479205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.479592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.480056] ? __pfx_lock_acquire+0x10/0x10 [ 30.480402] ? __pfx_mmap_region+0x10/0x10 [ 30.480797] ? security_mmap_addr+0x7d/0xa0 [ 30.481141] ? get_unmapped_area+0x1f5/0x3f0 [ 30.481545] do_mmap+0x854/0xf00 [ 30.481829] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.482151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.482574] ksys_mmap_pgoff+0x3af/0x500 [ 30.482885] do_syscall_64+0x3f/0x90 [ 30.483259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.483727] RIP: 0033:0x7f40e6baad82 [ 30.484027] 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 [ 30.485415] RSP: 002b:00007ffd2c86f4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.486043] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40e6baad82 [ 30.486662] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40e5fe4000 [ 30.487320] RBP: 00007f40e5fe4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.487914] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b9e80cec0 [ 30.488503] R13: 00007ffd2c86f4e0 R14: 00007ffd2c86f510 R15: 00007ffd2c86f870 [ 30.489068] [ 30.489276] [ 30.489415] Allocated by task 214: [ 30.489737] kasan_save_stack+0x22/0x50 [ 30.490062] kasan_set_track+0x25/0x30 [ 30.490428] __kasan_slab_alloc+0x59/0x70 [ 30.490845] kmem_cache_alloc+0x16b/0x370 [ 30.491291] vm_area_dup+0x20/0x160 [ 30.491639] __split_vma+0x170/0x950 [ 30.491948] split_vma+0xc6/0x110 [ 30.492232] mprotect_fixup+0x8d2/0xb30 [ 30.492612] do_mprotect_pkey+0x87e/0xd40 [ 30.492950] __x64_sys_mprotect+0x78/0xc0 [ 30.493289] do_syscall_64+0x3f/0x90 [ 30.493649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.494077] [ 30.494236] Freed by task 214: [ 30.494562] kasan_save_stack+0x22/0x50 [ 30.494888] kasan_set_track+0x25/0x30 [ 30.495543] kasan_save_free_info+0x2b/0x50 [ 30.495887] __kasan_slab_free+0x10a/0x190 [ 30.496239] kmem_cache_free+0x10d/0x4d0 [ 30.496626] rcu_core+0x8c8/0x2860 [ 30.496911] __do_softirq+0x1b7/0x7d4 [ 30.497282] [ 30.497424] Last potentially related work creation: [ 30.497841] kasan_save_stack+0x22/0x50 [ 30.498152] __kasan_record_aux_stack+0x8e/0xa0 [ 30.498634] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.499083] remove_vma+0x139/0x170 [ 30.499403] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.499912] do_vmi_munmap+0x1f1/0x2b0 [ 30.500229] __vm_munmap+0x138/0x3a0 [ 30.500592] __x64_sys_munmap+0x59/0x80 [ 30.500999] do_syscall_64+0x3f/0x90 [ 30.501311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.501776] [ 30.501917] The buggy address belongs to the object at ffff88800f1a6e80 [ 30.501917] which belongs to the cache vm_area_struct of size 168 [ 30.503012] The buggy address is located 88 bytes inside of [ 30.503012] freed 168-byte region [ffff88800f1a6e80, ffff88800f1a6f28) [ 30.503989] [ 30.504134] The buggy address belongs to the physical page: [ 30.504653] page:000000004b43dd00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1a6 [ 30.505344] memcg:ffff88800d2fbc01 [ 30.505670] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.506085] page_type: 0xffffffff() [ 30.506379] raw: 0100000000000200 ffff8880087a0c80 ffffea0000328d00 dead000000000006 [ 30.507052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2fbc01 [ 30.507707] page dumped because: kasan: bad access detected [ 30.508128] [ 30.508272] Memory state around the buggy address: [ 30.508698] ffff88800f1a6d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.509245] ffff88800f1a6e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.509849] >ffff88800f1a6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.510391] ^ [ 30.510927] ffff88800f1a6f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.511562] ffff88800f1a6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.512104] ================================================================== [ 30.522801] Disabling lock debugging due to kernel taint [ 34.055740] BUG: Bad rss-counter state mm:00000000ab397d58 type:MM_FILEPAGES val:33 [ 34.056478] BUG: Bad rss-counter state mm:00000000ab397d58 type:MM_ANONPAGES val:22 [ 34.683252] BUG: Bad rss-counter state mm:00000000f813bdb7 type:MM_FILEPAGES val:33 [ 34.683921] BUG: Bad rss-counter state mm:00000000f813bdb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22022' (ECDSA) to the list of known hosts. 2023/06/21 09:57:31 fuzzer started 2023/06/21 09:57:32 dialing manager at localhost:36067 2023/06/21 09:57:32 checking machine... 2023/06/21 09:57:32 checking revisions... [ 35.602296] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:57:32 testing simple program... [ 35.647943] cgroup: Unknown subsys name 'net' [ 35.713584] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:57:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001e37ed9 RSI=ffffffff8116fe2a RDI=ffff88800f1bf6c8 RBP=ffff88800f1bf760 RSP=ffff88800f1bf698 R8 =0000000000000001 R9 =ffff88800f1bf708 R10=0000000000038001 R11=000000000000712d R12=ffff88800f1bf790 R13=0000000000000000 R14=ffff88800fde8000 R15=ffff88800f1bf6c8 RIP=ffffffff811305f1 RFL=00000212 [----A--] 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 00007f627b40a900 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=00007f1ffe50b328 CR3=00000000196e2000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003291ecf RBX=0000000000000075 RCX=0000000000000000 RDX=ffff888010358000 RSI=ffffffff81746307 RDI=ffff88801948f678 RBP=ffff888016c14a00 RSP=ffff888015997c50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888015997c98 R14=0000000000000000 R15=ffff88801948f658 RIP=ffffffff81746317 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 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=00007f0e73d83000 CR3=000000000966a000 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=8790b5c272af40a18441b7c0cca2d47c XMM02=2c67c8bc2e329bc3000000000011a480 XMM03=fb795ef6d657705600000000001216f0 XMM04=eeb43c87244875ca00000000000ae988 XMM05=4c7b2a947b7b41370000000000131e60 XMM06=db20f175d54767f00000000000131858 XMM07=e042d86d42eb936e0000000000121970 XMM08=54ef92341709af8b000000000011a4e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000