syzkaller login: [ 30.839672] BUG: Bad rss-counter state mm:00000000dc8b2546 type:MM_FILEPAGES val:33 [ 30.841104] BUG: Bad rss-counter state mm:00000000dc8b2546 type:MM_ANONPAGES val:22 [ 30.885477] ================================================================== [ 30.886490] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.887532] Read of size 8 at addr ffff88801a0b6880 by task sshd/219 [ 30.888485] [ 30.888727] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.889698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.890801] Call Trace: [ 30.891160] <TASK> [ 30.891478] dump_stack_lvl+0x91/0xf0 [ 30.892023] print_report+0xcc/0x620 [ 30.892559] ? __virt_addr_valid+0x102/0x340 [ 30.893181] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.893872] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.894558] kasan_report+0xbe/0xf0 [ 30.895086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895781] vma_interval_tree_remove+0xc75/0xec0 [ 30.896451] vma_prepare+0xc54/0x11a0 [ 30.896984] __split_vma+0x5af/0x950 [ 30.897527] ? __pfx___split_vma+0x10/0x10 [ 30.898117] ? find_held_lock+0x2c/0x110 [ 30.898697] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.899329] ? lock_is_held_type+0x9f/0x120 [ 30.899932] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.900609] ? mtree_range_walk+0x632/0x900 [ 30.901236] ? mas_walk+0x5c7/0x7c0 [ 30.901767] do_vmi_munmap+0x1f1/0x2b0 [ 30.902320] mmap_region+0x1f9/0x2660 [ 30.902859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.903428] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.904224] ? __pfx_lock_acquire+0x10/0x10 [ 30.904820] ? __pfx_mmap_region+0x10/0x10 [ 30.905428] ? security_mmap_addr+0x7d/0xa0 [ 30.906019] ? get_unmapped_area+0x1f5/0x3f0 [ 30.906632] do_mmap+0x854/0xf00 [ 30.907121] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.907674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.908302] ksys_mmap_pgoff+0x3af/0x500 [ 30.908871] do_syscall_64+0x3f/0x90 [ 30.909413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910133] RIP: 0033:0x7fbb06f82d82 [ 30.910644] 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 [ 30.913024] RSP: 002b:00007ffc3e8651b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.914053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb06f82d82 [ 30.915004] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb063bc000 [ 30.915950] RBP: 00007fbb063bc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.916896] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561024548ec0 [ 30.917855] R13: 00007ffc3e8651d0 R14: 00007ffc3e865200 R15: 00007ffc3e865560 [ 30.918815] </TASK> [ 30.919141] [ 30.919378] Allocated by task 212: [ 30.919857] kasan_save_stack+0x22/0x50 [ 30.920420] kasan_set_track+0x25/0x30 [ 30.920972] __kasan_slab_alloc+0x59/0x70 [ 30.921573] kmem_cache_alloc+0x16b/0x370 [ 30.922150] vm_area_dup+0x20/0x160 [ 30.922657] __split_vma+0x170/0x950 [ 30.923179] split_vma+0xc6/0x110 [ 30.923669] mprotect_fixup+0x8d2/0xb30 [ 30.924231] do_mprotect_pkey+0x87e/0xd40 [ 30.924814] __x64_sys_mprotect+0x78/0xc0 [ 30.925400] do_syscall_64+0x3f/0x90 [ 30.925927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926646] [ 30.926884] Freed by task 212: [ 30.927323] kasan_save_stack+0x22/0x50 [ 30.927886] kasan_set_track+0x25/0x30 [ 30.928436] kasan_save_free_info+0x2b/0x50 [ 30.929031] __kasan_slab_free+0x10a/0x190 [ 30.929649] kmem_cache_free+0x10d/0x4d0 [ 30.930216] rcu_core+0x8c8/0x2860 [ 30.930714] __do_softirq+0x1b7/0x7d4 [ 30.931250] [ 30.931491] Last potentially related work creation: [ 30.932145] kasan_save_stack+0x22/0x50 [ 30.932708] __kasan_record_aux_stack+0x8e/0xa0 [ 30.933360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.934076] remove_vma+0x139/0x170 [ 30.934578] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.935200] do_vmi_munmap+0x1f1/0x2b0 [ 30.935742] __vm_munmap+0x138/0x3a0 [ 30.936263] __x64_sys_munmap+0x59/0x80 [ 30.936818] do_syscall_64+0x3f/0x90 [ 30.937354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.938074] [ 30.938313] The buggy address belongs to the object at ffff88801a0b6828 [ 30.938313] which belongs to the cache vm_area_struct of size 168 [ 30.939959] The buggy address is located 88 bytes inside of [ 30.939959] freed 168-byte region [ffff88801a0b6828, ffff88801a0b68d0) [ 30.941548] [ 30.941787] The buggy address belongs to the physical page: [ 30.942523] page:00000000dc0aef79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0b6 [ 30.943746] memcg:ffff888019d15c01 [ 30.944223] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.944943] page_type: 0xffffffff() [ 30.945453] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.946482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d15c01 [ 30.947500] page dumped because: kasan: bad access detected [ 30.948242] [ 30.948482] Memory state around the buggy address: [ 30.949147] ffff88801a0b6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.950105] ffff88801a0b6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.951061] >ffff88801a0b6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.952016] ^ [ 30.952476] ffff88801a0b6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.953442] ffff88801a0b6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.954394] ================================================================== [ 30.955474] Disabling lock debugging due to kernel taint [ 33.056730] BUG: Bad rss-counter state mm:00000000d89bb0b1 type:MM_FILEPAGES val:33 [ 33.057838] BUG: Bad rss-counter state mm:00000000d89bb0b1 type:MM_ANONPAGES val:22 [ 33.476269] BUG: Bad rss-counter state mm:0000000039a93e88 type:MM_FILEPAGES val:33 [ 33.477098] BUG: Bad rss-counter state mm:0000000039a93e88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22158' (ECDSA) to the list of known hosts. 2023/06/21 09:22:29 fuzzer started 2023/06/21 09:22:30 dialing manager at localhost:36067 2023/06/21 09:22:30 checking machine... 2023/06/21 09:22:30 checking revisions... [ 34.201482] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:22:30 testing simple program... [ 34.260842] cgroup: Unknown subsys name 'net' [ 34.324973] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:22:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=1ffffffff0ac2cf0 RSI=00000000000069f5 RDI=ffff88806ce3a360 RBP=ffffffff85616740 RSP=ffff88806ce09db0 R8 =0000000000000000 R9 =ffffffff85616780 R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806ce3a2c0 R13=ffff88806ce3a360 R14=ffff88806ce3a2d4 R15=0000000000000000 RIP=ffffffff81381414 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1192009900 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=00007f119142a840 CR3=000000000d620000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f4da3c4212ee2c1500000000000ae988 XMM05=fc2f34ecd5cb14080000000000132c10 XMM06=806171799158d9670000000000131a00 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801ca10001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801ca0f901 RSI=ffff88801ca0f9a0 RDI=ffff88801ca0f9b8 RBP=ffff88801ca0fa00 RSP=ffff88801ca0f8e0 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88801ca0fa08 R13=ffff88801ca0f9f0 R14=ffff88801ca0f9a8 R15=ffff88801ca0f9a8 RIP=ffffffff811304d5 RFL=00000286 [--S--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 00007f1253c44900 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=00007f12541fb618 CR3=000000000c648000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000