syzkaller login: [ 34.803459] BUG: Bad rss-counter state mm:0000000001fbf7f9 type:MM_FILEPAGES val:33 [ 34.804508] BUG: Bad rss-counter state mm:0000000001fbf7f9 type:MM_ANONPAGES val:22 [ 34.969416] ================================================================== [ 34.970625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.971819] Read of size 8 at addr ffff888016f65880 by task sshd/220 [ 34.972822] [ 34.973100] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.974212] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.975463] Call Trace: [ 34.975873] [ 34.976237] dump_stack_lvl+0x91/0xf0 [ 34.976893] print_report+0xcc/0x620 [ 34.977517] ? __virt_addr_valid+0x102/0x340 [ 34.978225] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.979031] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.979880] kasan_report+0xbe/0xf0 [ 34.980536] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.981377] vma_interval_tree_remove+0xc75/0xec0 [ 34.982195] vma_prepare+0xc54/0x11a0 [ 34.982836] __split_vma+0x5af/0x950 [ 34.983477] ? __pfx___split_vma+0x10/0x10 [ 34.984196] ? find_held_lock+0x2c/0x110 [ 34.984809] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.985384] ? lock_is_held_type+0x9f/0x120 [ 34.985932] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.986554] ? mtree_range_walk+0x632/0x900 [ 34.987113] ? mas_walk+0x5c7/0x7c0 [ 34.987594] do_vmi_munmap+0x1f1/0x2b0 [ 34.988096] mmap_region+0x1f9/0x2660 [ 34.988605] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.989139] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.989879] ? __pfx_lock_acquire+0x10/0x10 [ 34.990422] ? __pfx_mmap_region+0x10/0x10 [ 34.990990] ? security_mmap_addr+0x7d/0xa0 [ 34.991534] ? get_unmapped_area+0x1f5/0x3f0 [ 34.992102] do_mmap+0x854/0xf00 [ 34.992567] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.993079] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.993652] ksys_mmap_pgoff+0x3af/0x500 [ 34.994173] do_syscall_64+0x3f/0x90 [ 34.994665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.995332] RIP: 0033:0x7fbb584f6d82 [ 34.995803] 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 [ 34.998031] RSP: 002b:00007fffadb40618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.998954] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb584f6d82 [ 34.999829] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb57930000 [ 35.000713] RBP: 00007fbb57930000 R08: 0000000000000009 R09: 0000000000001000 [ 35.001571] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587ead05ec0 [ 35.002430] R13: 00007fffadb40630 R14: 00007fffadb40660 R15: 00007fffadb409c0 [ 35.003302] [ 35.003597] [ 35.003812] Allocated by task 213: [ 35.004246] kasan_save_stack+0x22/0x50 [ 35.004773] kasan_set_track+0x25/0x30 [ 35.005284] __kasan_slab_alloc+0x59/0x70 [ 35.005815] kmem_cache_alloc+0x16b/0x370 [ 35.006344] vm_area_dup+0x20/0x160 [ 35.006807] __split_vma+0x170/0x950 [ 35.007278] split_vma+0xc6/0x110 [ 35.007720] mprotect_fixup+0x8d2/0xb30 [ 35.008231] do_mprotect_pkey+0x87e/0xd40 [ 35.008769] __x64_sys_mprotect+0x78/0xc0 [ 35.009290] do_syscall_64+0x3f/0x90 [ 35.009768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.010419] [ 35.010708] Freed by task 213: [ 35.011353] kasan_save_stack+0x22/0x50 [ 35.012146] kasan_set_track+0x25/0x30 [ 35.012931] kasan_save_free_info+0x2b/0x50 [ 35.013748] __kasan_slab_free+0x10a/0x190 [ 35.014556] kmem_cache_free+0x10d/0x4d0 [ 35.015329] rcu_core+0x8c8/0x2860 [ 35.016013] __do_softirq+0x1b7/0x7d4 [ 35.016756] [ 35.017087] Last potentially related work creation: [ 35.017986] kasan_save_stack+0x22/0x50 [ 35.018763] __kasan_record_aux_stack+0x8e/0xa0 [ 35.019658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.020623] remove_vma+0x139/0x170 [ 35.021198] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.021841] do_vmi_munmap+0x1f1/0x2b0 [ 35.022408] __vm_munmap+0x138/0x3a0 [ 35.022952] __x64_sys_munmap+0x59/0x80 [ 35.023530] do_syscall_64+0x3f/0x90 [ 35.024077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.024846] [ 35.025105] The buggy address belongs to the object at ffff888016f65828 [ 35.025105] which belongs to the cache vm_area_struct of size 168 [ 35.026823] The buggy address is located 88 bytes inside of [ 35.026823] freed 168-byte region [ffff888016f65828, ffff888016f658d0) [ 35.028467] [ 35.028722] The buggy address belongs to the physical page: [ 35.029462] page:00000000427e0527 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f65 [ 35.030589] memcg:ffff88800e4d1e01 [ 35.031028] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.031703] page_type: 0xffffffff() [ 35.032177] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.033134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4d1e01 [ 35.034089] page dumped because: kasan: bad access detected [ 35.034788] [ 35.035017] Memory state around the buggy address: [ 35.035614] ffff888016f65780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.036538] ffff888016f65800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.037427] >ffff888016f65880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.038304] ^ [ 35.038726] ffff888016f65900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.039620] ffff888016f65980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.040525] ================================================================== [ 35.041469] Disabling lock debugging due to kernel taint [ 36.977648] BUG: Bad rss-counter state mm:00000000af06e00c type:MM_FILEPAGES val:33 [ 36.978324] BUG: Bad rss-counter state mm:00000000af06e00c type:MM_ANONPAGES val:22 [ 37.544435] BUG: Bad rss-counter state mm:00000000f0bc14ff type:MM_FILEPAGES val:33 [ 37.545608] BUG: Bad rss-counter state mm:00000000f0bc14ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25778' (ECDSA) to the list of known hosts. 2023/06/19 13:53:53 fuzzer started 2023/06/19 13:53:53 dialing manager at localhost:44161 2023/06/19 13:53:53 checking machine... 2023/06/19 13:53:53 checking revisions... [ 38.158406] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:53:54 testing simple program... [ 38.207521] cgroup: Unknown subsys name 'net' [ 38.252641] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:53:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801c9d1b40 RCX=ffffffff8364f395 RDX=ffff88800f0ad1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800c566000 RSP=ffff88800e1f79f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff88801c9d1ba0 R14=0000000000034000 R15=dffffc0000000000 RIP=ffffffff814c07e0 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 00007f4cc8ef1900 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=00007f4cc94a6650 CR3=000000000e0ec000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fea920c2370 CR3=000000000dd84000 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=637aa9d36d7d888178443afcadf885db XMM02=2c67c8bc2e329bc3000000000011f9c0 XMM03=fb795ef6d657705600000000001240a8 XMM04=1cac47f42a74b8e600000000000ae988 XMM05=59d5b690e0af863b0000000000133c90 XMM06=00c3ffa147b8d8570000000000133b18 XMM07=e042d86d42eb936e0000000000124328 XMM08=62a1a98294a879e3000000000011fa20 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000