syzkaller login: [ 30.791117] BUG: Bad rss-counter state mm:000000005b5e008a type:MM_FILEPAGES val:33 [ 30.792191] BUG: Bad rss-counter state mm:000000005b5e008a type:MM_ANONPAGES val:22 [ 30.967812] ================================================================== [ 30.968776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.969774] Read of size 8 at addr ffff88800c9d4c20 by task sshd/220 [ 30.970694] [ 30.970925] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.971843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.972894] Call Trace: [ 30.973238] [ 30.973540] dump_stack_lvl+0x91/0xf0 [ 30.974070] print_report+0xcc/0x620 [ 30.974586] ? __virt_addr_valid+0x102/0x340 [ 30.975183] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.975840] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.976502] kasan_report+0xbe/0xf0 [ 30.977008] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.977684] vma_interval_tree_remove+0xc75/0xec0 [ 30.978328] vma_prepare+0xc54/0x11a0 [ 30.978843] __split_vma+0x5af/0x950 [ 30.979352] ? __pfx___split_vma+0x10/0x10 [ 30.979916] ? find_held_lock+0x2c/0x110 [ 30.980470] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.981106] ? lock_is_held_type+0x9f/0x120 [ 30.981681] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.982327] ? mtree_range_walk+0x632/0x900 [ 30.982931] ? mas_walk+0x5c7/0x7c0 [ 30.983437] do_vmi_munmap+0x1f1/0x2b0 [ 30.983966] mmap_region+0x1f9/0x2660 [ 30.984476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.985022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.985804] ? __pfx_lock_acquire+0x10/0x10 [ 30.986369] ? __pfx_mmap_region+0x10/0x10 [ 30.986946] ? security_mmap_addr+0x7d/0xa0 [ 30.987506] ? get_unmapped_area+0x1f5/0x3f0 [ 30.988089] do_mmap+0x854/0xf00 [ 30.988559] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.989114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.989717] ksys_mmap_pgoff+0x3af/0x500 [ 30.990257] do_syscall_64+0x3f/0x90 [ 30.990765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.991453] RIP: 0033:0x7f02a2e4ad82 [ 30.991939] 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 [ 30.994237] RSP: 002b:00007fff89337f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.995202] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02a2e4ad82 [ 30.996113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02a2284000 [ 30.997014] RBP: 00007f02a2284000 R08: 0000000000000009 R09: 0000000000001000 [ 30.997931] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bff8bdd90 [ 30.998828] R13: 00007fff89337fb0 R14: 00007fff89337fe0 R15: 00007fff89338340 [ 30.999740] [ 31.000055] [ 31.000288] Allocated by task 213: [ 31.000743] kasan_save_stack+0x22/0x50 [ 31.001302] kasan_set_track+0x25/0x30 [ 31.001830] __kasan_slab_alloc+0x59/0x70 [ 31.002390] kmem_cache_alloc+0x16b/0x370 [ 31.002945] vm_area_dup+0x20/0x160 [ 31.003433] __split_vma+0x170/0x950 [ 31.003947] split_vma+0xc6/0x110 [ 31.004419] mprotect_fixup+0x8d2/0xb30 [ 31.004964] do_mprotect_pkey+0x87e/0xd40 [ 31.005536] __x64_sys_mprotect+0x78/0xc0 [ 31.006099] do_syscall_64+0x3f/0x90 [ 31.006606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.007294] [ 31.007520] Freed by task 13: [ 31.007930] kasan_save_stack+0x22/0x50 [ 31.008472] kasan_set_track+0x25/0x30 [ 31.009008] kasan_save_free_info+0x2b/0x50 [ 31.009598] __kasan_slab_free+0x10a/0x190 [ 31.010165] kmem_cache_free+0x10d/0x4d0 [ 31.010713] rcu_core+0x8c8/0x2860 [ 31.011190] __do_softirq+0x1b7/0x7d4 [ 31.011703] [ 31.011932] Last potentially related work creation: [ 31.012552] kasan_save_stack+0x22/0x50 [ 31.013095] __kasan_record_aux_stack+0x8e/0xa0 [ 31.013715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.014404] remove_vma+0x139/0x170 [ 31.014894] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.015488] do_vmi_munmap+0x1f1/0x2b0 [ 31.016015] __vm_munmap+0x138/0x3a0 [ 31.016516] __x64_sys_munmap+0x59/0x80 [ 31.017052] do_syscall_64+0x3f/0x90 [ 31.017567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.018256] [ 31.018482] The buggy address belongs to the object at ffff88800c9d4bc8 [ 31.018482] which belongs to the cache vm_area_struct of size 168 [ 31.020050] The buggy address is located 88 bytes inside of [ 31.020050] freed 168-byte region [ffff88800c9d4bc8, ffff88800c9d4c70) [ 31.021552] [ 31.021784] The buggy address belongs to the physical page: [ 31.022480] page:000000001eb08c5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9d4 [ 31.023633] memcg:ffff88800f0e4601 [ 31.024082] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.024780] page_type: 0xffffffff() [ 31.025275] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.026257] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0e4601 [ 31.027223] page dumped because: kasan: bad access detected [ 31.027936] [ 31.028166] Memory state around the buggy address: [ 31.028790] ffff88800c9d4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.029711] ffff88800c9d4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.030629] >ffff88800c9d4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.031543] ^ [ 31.032109] ffff88800c9d4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.033020] ffff88800c9d4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.033934] ================================================================== [ 31.035001] Disabling lock debugging due to kernel taint [ 33.159291] BUG: Bad rss-counter state mm:00000000cee219b1 type:MM_FILEPAGES val:33 [ 33.160552] BUG: Bad rss-counter state mm:00000000cee219b1 type:MM_ANONPAGES val:22 [ 33.651854] BUG: Bad rss-counter state mm:0000000047bc005b type:MM_FILEPAGES val:33 [ 33.653150] BUG: Bad rss-counter state mm:0000000047bc005b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44620' (ECDSA) to the list of known hosts. 2023/06/20 02:15:59 fuzzer started 2023/06/20 02:15:59 dialing manager at localhost:44161 2023/06/20 02:15:59 checking machine... 2023/06/20 02:15:59 checking revisions... [ 34.241986] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:15:59 testing simple program... [ 34.288991] cgroup: Unknown subsys name 'net' [ 34.327361] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:15:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff3ed82fc60 CR3=000000001024e000 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=8632e11ae1ca0fac3b4897ece365fa17 XMM02=000000000011cbe0ec2efd57dc4c00df XMM03=00000000001242585e1bb9fe76844b9e XMM04=c3b142cf43222d2400000000000ae988 XMM05=19e9129bd510f23500000000001340b0 XMM06=e67488982f19f30e0000000000132f18 XMM07=e042d86d42eb936e00000000001244d8 XMM08=5e1bb9fe76844b9e000000000011cc40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000055b2f3c829b8 RBX=000055b2f3c829b0 RCX=000055b2f3c61010 RDX=0000000000000000 RSI=0000000000000007 RDI=000055b2f3ca9280 RBP=00007fb45040b5c0 RSP=00007fff65280b20 R8 =000055b2f3ca7180 R9 =0000000000000000 R10=00007fb45097fe10 R11=0000000000000000 R12=0000000000800204 R13=000055b2f3c81778 R14=00007fb45040b8b8 R15=0000000000000000 RIP=00007fb45040316c RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb45042d900 00000000 00000000 GS =0000 0000000000000000 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=00007fff65279ff8 CR3=000000000e5ae000 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=ffffffffffffffffffff000000000000 XMM01=01000101010101010100ffffffffffff XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000