syzkaller login: [ 41.447043] BUG: Bad rss-counter state mm:0000000059b86cb4 type:MM_FILEPAGES val:33 [ 41.448099] BUG: Bad rss-counter state mm:0000000059b86cb4 type:MM_ANONPAGES val:22 [ 41.604467] ================================================================== [ 41.605400] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.606341] Read of size 8 at addr ffff888019f7e968 by task sshd/220 [ 41.607126] [ 41.607372] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.608414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.609406] Call Trace: [ 41.609732] [ 41.610024] dump_stack_lvl+0x91/0xf0 [ 41.610563] print_report+0xcc/0x620 [ 41.611056] ? __virt_addr_valid+0x102/0x340 [ 41.611644] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.612277] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.612916] kasan_report+0xbe/0xf0 [ 41.613402] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.614033] vma_interval_tree_remove+0xc75/0xec0 [ 41.614640] vma_prepare+0xc54/0x11a0 [ 41.615120] __split_vma+0x5af/0x950 [ 41.615604] ? __pfx___split_vma+0x10/0x10 [ 41.616139] ? find_held_lock+0x2c/0x110 [ 41.616662] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.617231] ? lock_is_held_type+0x9f/0x120 [ 41.617768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.618379] ? mtree_range_walk+0x632/0x900 [ 41.618934] ? mas_walk+0x5c7/0x7c0 [ 41.619433] do_vmi_munmap+0x1f1/0x2b0 [ 41.619925] mmap_region+0x1f9/0x2660 [ 41.620408] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.620922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.621671] ? __pfx_lock_acquire+0x10/0x10 [ 41.622215] ? __pfx_mmap_region+0x10/0x10 [ 41.622749] ? security_mmap_addr+0x7d/0xa0 [ 41.623298] ? get_unmapped_area+0x1f5/0x3f0 [ 41.623859] do_mmap+0x854/0xf00 [ 41.624305] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.624808] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.625390] ksys_mmap_pgoff+0x3af/0x500 [ 41.625905] do_syscall_64+0x3f/0x90 [ 41.626394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.627053] RIP: 0033:0x7fc500072d82 [ 41.627538] 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 [ 41.629677] RSP: 002b:00007ffc209b9398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.630618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc500072d82 [ 41.631500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4ff4ac000 [ 41.632380] RBP: 00007fc4ff4ac000 R08: 0000000000000009 R09: 0000000000001000 [ 41.633263] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558983324d90 [ 41.634150] R13: 00007ffc209b93b0 R14: 00007ffc209b93e0 R15: 00007ffc209b9740 [ 41.635041] [ 41.635353] [ 41.635575] Allocated by task 213: [ 41.636024] kasan_save_stack+0x22/0x50 [ 41.636551] kasan_set_track+0x25/0x30 [ 41.637064] __kasan_slab_alloc+0x59/0x70 [ 41.637603] kmem_cache_alloc+0x16b/0x370 [ 41.638146] vm_area_dup+0x20/0x160 [ 41.638611] __split_vma+0x170/0x950 [ 41.639097] split_vma+0xc6/0x110 [ 41.639570] mprotect_fixup+0x8d2/0xb30 [ 41.640098] do_mprotect_pkey+0x87e/0xd40 [ 41.640634] __x64_sys_mprotect+0x78/0xc0 [ 41.641175] do_syscall_64+0x3f/0x90 [ 41.641655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.642320] [ 41.642539] Freed by task 213: [ 41.642946] kasan_save_stack+0x22/0x50 [ 41.643479] kasan_set_track+0x25/0x30 [ 41.643986] kasan_save_free_info+0x2b/0x50 [ 41.644540] __kasan_slab_free+0x10a/0x190 [ 41.645097] kmem_cache_free+0x10d/0x4d0 [ 41.645623] rcu_core+0x8c8/0x2860 [ 41.646083] __do_softirq+0x1b7/0x7d4 [ 41.646577] [ 41.646795] Last potentially related work creation: [ 41.647419] kasan_save_stack+0x22/0x50 [ 41.647941] __kasan_record_aux_stack+0x8e/0xa0 [ 41.648536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.649214] remove_vma+0x139/0x170 [ 41.649765] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.650348] do_vmi_munmap+0x1f1/0x2b0 [ 41.650853] __vm_munmap+0x138/0x3a0 [ 41.651346] __x64_sys_munmap+0x59/0x80 [ 41.651860] do_syscall_64+0x3f/0x90 [ 41.652349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.653019] [ 41.653246] The buggy address belongs to the object at ffff888019f7e910 [ 41.653246] which belongs to the cache vm_area_struct of size 168 [ 41.654772] The buggy address is located 88 bytes inside of [ 41.654772] freed 168-byte region [ffff888019f7e910, ffff888019f7e9b8) [ 41.656222] [ 41.656444] The buggy address belongs to the physical page: [ 41.657130] page:000000007c667cf6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f7e [ 41.658254] memcg:ffff88800ed71301 [ 41.658683] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.659364] page_type: 0xffffffff() [ 41.659827] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.660767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed71301 [ 41.661698] page dumped because: kasan: bad access detected [ 41.662389] [ 41.662611] Memory state around the buggy address: [ 41.663207] ffff888019f7e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 41.664104] ffff888019f7e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 41.664995] >ffff888019f7e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.665854] ^ [ 41.666660] ffff888019f7e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 41.667555] ffff888019f7ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.668424] ================================================================== [ 41.669383] Disabling lock debugging due to kernel taint [ 44.333255] BUG: Bad rss-counter state mm:00000000b3ad072e type:MM_FILEPAGES val:33 [ 44.334254] BUG: Bad rss-counter state mm:00000000b3ad072e type:MM_ANONPAGES val:22 [ 44.901275] BUG: Bad rss-counter state mm:000000009bda6e23 type:MM_FILEPAGES val:33 [ 44.902703] BUG: Bad rss-counter state mm:000000009bda6e23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56672' (ECDSA) to the list of known hosts. 2023/06/20 04:09:08 fuzzer started 2023/06/20 04:09:08 dialing manager at localhost:44161 2023/06/20 04:09:08 checking machine... 2023/06/20 04:09:08 checking revisions... [ 45.568913] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:09:08 testing simple program... [ 45.623799] cgroup: Unknown subsys name 'net' [ 45.673697] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:08:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880171a7610 RCX=ffffffff81132ffe RDX=1ffff11002e34eb4 RSI=0000000000000000 RDI=ffff8880171a75e8 RBP=ffff888015d0b680 RSP=ffff8880171a7528 R8 =ffff888013e98000 R9 =0000000000000000 R10=ffff8880171a7578 R11=ffffffff81806df1 R12=ffff8880171a7598 R13=ffff8880171a75a0 R14=ffff8880171a75c0 R15=ffff8880171a7578 RIP=ffffffff81132ee2 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 00007f6a75b5d700 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=00007fdb722c30b0 CR3=000000000eede000 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=2038303a39303a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a39303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019ed2a01 RBX=ffff888019245490 RCX=ffffea0000000000 RDX=ffffea0000649101 RSI=ffff88800d9e0d80 RDI=ffff8880087b6500 RBP=ffff8880087b6500 RSP=ffff8880147d7608 R8 =ffff8880147d7670 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800d9e0d80 R13=0000000000000000 R14=ffff8880147d7670 R15=ffffea0000649100 RIP=ffffffff81803bef RFL=00000202 [-------] 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 00007f9bc1b75900 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=00007f9bc1002680 CR3=000000000c68a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=56879d458e83f12100000000000ae988 XMM05=481c5b582869a23100000000001354f0 XMM06=19e9129bd510f2350000000000134388 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000