[ 30.747457] BUG: Bad rss-counter state mm:000000002c45a4f8 type:MM_FILEPAGES val:33 [ 30.748928] BUG: Bad rss-counter state mm:000000002c45a4f8 type:MM_ANONPAGES val:22 [ 30.908752] ================================================================== [ 30.909691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.910647] Read of size 8 at addr ffff888008c75c20 by task sshd/219 [ 30.911597] [ 30.911818] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.912685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.913659] Call Trace: [ 30.913991] [ 30.914276] dump_stack_lvl+0x91/0xf0 [ 30.914793] print_report+0xcc/0x620 [ 30.915282] ? __virt_addr_valid+0x102/0x340 [ 30.915836] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.916454] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.917067] kasan_report+0xbe/0xf0 [ 30.917542] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.918167] vma_interval_tree_remove+0xc75/0xec0 [ 30.918807] vma_prepare+0xc54/0x11a0 [ 30.919297] __split_vma+0x5af/0x950 [ 30.919774] ? __pfx___split_vma+0x10/0x10 [ 30.920330] ? find_held_lock+0x2c/0x110 [ 30.920858] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.921420] ? lock_is_held_type+0x9f/0x120 [ 30.921963] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.922592] ? mtree_range_walk+0x632/0x900 [ 30.923149] ? mas_walk+0x5c7/0x7c0 [ 30.923628] do_vmi_munmap+0x1f1/0x2b0 [ 30.924121] mmap_region+0x1f9/0x2660 [ 30.924604] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.925117] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.925838] ? __pfx_lock_acquire+0x10/0x10 [ 30.926403] ? __pfx_mmap_region+0x10/0x10 [ 30.926934] ? security_mmap_addr+0x7d/0xa0 [ 30.927469] ? get_unmapped_area+0x1f5/0x3f0 [ 30.928026] do_mmap+0x854/0xf00 [ 30.928465] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.928964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.929532] ksys_mmap_pgoff+0x3af/0x500 [ 30.930044] do_syscall_64+0x3f/0x90 [ 30.930549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.931208] RIP: 0033:0x7f804f438d82 [ 30.931672] 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 [ 30.933831] RSP: 002b:00007fffa59c0988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.934761] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f804f438d82 [ 30.935614] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f804e872000 [ 30.936476] RBP: 00007f804e872000 R08: 0000000000000009 R09: 0000000000001000 [ 30.937327] R10: 0000000000000812 R11: 0000000000000206 R12: 000056159b92fb20 [ 30.938183] R13: 00007fffa59c09a0 R14: 00007fffa59c09d0 R15: 00007fffa59c0d30 [ 30.939091] [ 30.939388] [ 30.939604] Allocated by task 212: [ 30.940044] kasan_save_stack+0x22/0x50 [ 30.940563] kasan_set_track+0x25/0x30 [ 30.941080] __kasan_slab_alloc+0x59/0x70 [ 30.941626] kmem_cache_alloc+0x16b/0x370 [ 30.942169] vm_area_dup+0x20/0x160 [ 30.942649] __split_vma+0x170/0x950 [ 30.943133] split_vma+0xc6/0x110 [ 30.943582] mprotect_fixup+0x8d2/0xb30 [ 30.944103] do_mprotect_pkey+0x87e/0xd40 [ 30.944635] __x64_sys_mprotect+0x78/0xc0 [ 30.945176] do_syscall_64+0x3f/0x90 [ 30.945661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.946318] [ 30.946561] Freed by task 212: [ 30.946975] kasan_save_stack+0x22/0x50 [ 30.947485] kasan_set_track+0x25/0x30 [ 30.947992] kasan_save_free_info+0x2b/0x50 [ 30.948537] __kasan_slab_free+0x10a/0x190 [ 30.949079] kmem_cache_free+0x10d/0x4d0 [ 30.949594] rcu_core+0x8c8/0x2860 [ 30.950050] __do_softirq+0x1b7/0x7d4 [ 30.950550] [ 30.950770] Last potentially related work creation: [ 30.951360] kasan_save_stack+0x22/0x50 [ 30.951877] __kasan_record_aux_stack+0x8e/0xa0 [ 30.952524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.953174] remove_vma+0x139/0x170 [ 30.953631] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.954197] do_vmi_munmap+0x1f1/0x2b0 [ 30.954696] __vm_munmap+0x138/0x3a0 [ 30.955169] __x64_sys_munmap+0x59/0x80 [ 30.955670] do_syscall_64+0x3f/0x90 [ 30.956151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.956799] [ 30.957020] The buggy address belongs to the object at ffff888008c75bc8 [ 30.957020] which belongs to the cache vm_area_struct of size 168 [ 30.958510] The buggy address is located 88 bytes inside of [ 30.958510] freed 168-byte region [ffff888008c75bc8, ffff888008c75c70) [ 30.959934] [ 30.960155] The buggy address belongs to the physical page: [ 30.960820] page:00000000440c95da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c75 [ 30.961914] memcg:ffff8880096b7001 [ 30.962366] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.963022] page_type: 0xffffffff() [ 30.963479] raw: 0100000000000200 ffff8880087a0c80 ffffea000039f8c0 dead000000000006 [ 30.964417] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096b7001 [ 30.965335] page dumped because: kasan: bad access detected [ 30.965999] [ 30.966215] Memory state around the buggy address: [ 30.966815] ffff888008c75b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.967680] ffff888008c75b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.968541] >ffff888008c75c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.969400] ^ [ 30.969929] ffff888008c75c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.970811] ffff888008c75d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.971666] ================================================================== [ 30.972617] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.689460] BUG: Bad rss-counter state mm:000000009e175805 type:MM_FILEPAGES val:33 [ 33.690987] BUG: Bad rss-counter state mm:000000009e175805 type:MM_ANONPAGES val:22 [ 34.201897] BUG: Bad rss-counter state mm:000000008196ac8e type:MM_FILEPAGES val:33 [ 34.202948] BUG: Bad rss-counter state mm:000000008196ac8e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38659' (ECDSA) to the list of known hosts. 2023/06/20 16:25:57 fuzzer started 2023/06/20 16:25:57 dialing manager at localhost:36067 2023/06/20 16:25:57 checking machine... 2023/06/20 16:25:57 checking revisions... [ 34.981407] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:25:57 testing simple program... [ 35.023693] cgroup: Unknown subsys name 'net' [ 35.065647] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:25:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f7bc6f3f8e0 CR3=000000000e0f2000 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=2037353a35323a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a35323a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff84499f02 RDX=ffff888017edd1c0 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff8880164e7778 RSP=ffff8880164e70e0 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000009 R11=ffff8003618fe000 R12=0000000000000009 R13=00007fc114937fff R14=ffff8880164e7768 R15=0000000000000001 RIP=ffffffff814c02c5 RFL=00000293 [--S-A-C] 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 00007fc114903900 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=00007fc1148e2020 CR3=000000000fc96000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000