syzkaller login: [ 38.680079] BUG: Bad rss-counter state mm:00000000b31fb0f1 type:MM_FILEPAGES val:33 [ 38.681090] BUG: Bad rss-counter state mm:00000000b31fb0f1 type:MM_ANONPAGES val:22 [ 38.867939] ================================================================== [ 38.868936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.869889] Read of size 8 at addr ffff888019fb3798 by task sshd/220 [ 38.870811] [ 38.871033] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.871924] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.872936] Call Trace: [ 38.873260] [ 38.873548] dump_stack_lvl+0x91/0xf0 [ 38.874046] print_report+0xcc/0x620 [ 38.874538] ? __virt_addr_valid+0x102/0x340 [ 38.875092] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875736] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876350] kasan_report+0xbe/0xf0 [ 38.876830] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877462] vma_interval_tree_remove+0xc75/0xec0 [ 38.878082] vma_prepare+0xc54/0x11a0 [ 38.878575] __split_vma+0x5af/0x950 [ 38.879058] ? __pfx___split_vma+0x10/0x10 [ 38.879600] ? find_held_lock+0x2c/0x110 [ 38.880139] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.880716] ? lock_is_held_type+0x9f/0x120 [ 38.881266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.881894] ? mtree_range_walk+0x632/0x900 [ 38.882474] ? mas_walk+0x5c7/0x7c0 [ 38.882950] do_vmi_munmap+0x1f1/0x2b0 [ 38.883462] mmap_region+0x1f9/0x2660 [ 38.883955] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.884476] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.885205] ? __pfx_lock_acquire+0x10/0x10 [ 38.885746] ? __pfx_mmap_region+0x10/0x10 [ 38.886288] ? security_mmap_addr+0x7d/0xa0 [ 38.886847] ? get_unmapped_area+0x1f5/0x3f0 [ 38.887408] do_mmap+0x854/0xf00 [ 38.887893] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.888396] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.888965] ksys_mmap_pgoff+0x3af/0x500 [ 38.889490] do_syscall_64+0x3f/0x90 [ 38.889976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.890634] RIP: 0033:0x7f49907f7d82 [ 38.891102] 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 [ 38.893302] RSP: 002b:00007fff45ba64c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.894231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49907f7d82 [ 38.895105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f498fc31000 [ 38.895970] RBP: 00007f498fc31000 R08: 0000000000000009 R09: 0000000000001000 [ 38.896842] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b15a6c4ec0 [ 38.897723] R13: 00007fff45ba64e0 R14: 00007fff45ba6510 R15: 00007fff45ba6870 [ 38.898602] [ 38.898903] [ 38.899124] Allocated by task 213: [ 38.899587] kasan_save_stack+0x22/0x50 [ 38.900104] kasan_set_track+0x25/0x30 [ 38.900617] __kasan_slab_alloc+0x59/0x70 [ 38.901150] kmem_cache_alloc+0x16b/0x370 [ 38.901668] vm_area_dup+0x20/0x160 [ 38.902123] __split_vma+0x170/0x950 [ 38.902592] split_vma+0xc6/0x110 [ 38.903038] mprotect_fixup+0x8d2/0xb30 [ 38.903554] do_mprotect_pkey+0x87e/0xd40 [ 38.904081] __x64_sys_mprotect+0x78/0xc0 [ 38.904603] do_syscall_64+0x3f/0x90 [ 38.905078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.905727] [ 38.905946] Freed by task 204: [ 38.906343] kasan_save_stack+0x22/0x50 [ 38.906853] kasan_set_track+0x25/0x30 [ 38.907350] kasan_save_free_info+0x2b/0x50 [ 38.907904] __kasan_slab_free+0x10a/0x190 [ 38.908440] kmem_cache_free+0x10d/0x4d0 [ 38.908951] rcu_core+0x8c8/0x2860 [ 38.909392] __do_softirq+0x1b7/0x7d4 [ 38.909874] [ 38.910090] Last potentially related work creation: [ 38.910680] kasan_save_stack+0x22/0x50 [ 38.911188] __kasan_record_aux_stack+0x8e/0xa0 [ 38.911776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.912436] remove_vma+0x139/0x170 [ 38.912901] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.913467] do_vmi_munmap+0x1f1/0x2b0 [ 38.913960] __vm_munmap+0x138/0x3a0 [ 38.914432] __x64_sys_munmap+0x59/0x80 [ 38.914937] do_syscall_64+0x3f/0x90 [ 38.915414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916091] [ 38.916310] Second to last potentially related work creation: [ 38.917004] kasan_save_stack+0x22/0x50 [ 38.917521] __kasan_record_aux_stack+0x8e/0xa0 [ 38.918103] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918756] remove_vma+0x139/0x170 [ 38.919208] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.919788] do_vmi_munmap+0x1f1/0x2b0 [ 38.920277] mmap_region+0x1f9/0x2660 [ 38.920756] do_mmap+0x854/0xf00 [ 38.921187] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.921686] ksys_mmap_pgoff+0x3af/0x500 [ 38.922190] do_syscall_64+0x3f/0x90 [ 38.922674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923337] [ 38.923560] The buggy address belongs to the object at ffff888019fb3740 [ 38.923560] which belongs to the cache vm_area_struct of size 168 [ 38.925047] The buggy address is located 88 bytes inside of [ 38.925047] freed 168-byte region [ffff888019fb3740, ffff888019fb37e8) [ 38.926469] [ 38.926689] The buggy address belongs to the physical page: [ 38.927367] page:0000000008c9e3d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fb3 [ 38.928498] memcg:ffff88800ebbdf01 [ 38.928936] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.929593] page_type: 0xffffffff() [ 38.930051] raw: 0100000000000200 ffff8880087a0c80 ffffea000036fc80 dead000000000006 [ 38.930978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebbdf01 [ 38.931914] page dumped because: kasan: bad access detected [ 38.932579] [ 38.932795] Memory state around the buggy address: [ 38.933387] ffff888019fb3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.934266] ffff888019fb3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.935140] >ffff888019fb3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.936014] ^ [ 38.936515] ffff888019fb3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.937381] ffff888019fb3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.938246] ================================================================== [ 38.939239] Disabling lock debugging due to kernel taint [ 40.835428] BUG: Bad rss-counter state mm:0000000017238a1f type:MM_FILEPAGES val:33 [ 40.836967] BUG: Bad rss-counter state mm:0000000017238a1f type:MM_ANONPAGES val:22 [ 41.399438] BUG: Bad rss-counter state mm:00000000a0d749f4 type:MM_FILEPAGES val:33 [ 41.400761] BUG: Bad rss-counter state mm:00000000a0d749f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34246' (ECDSA) to the list of known hosts. 2023/06/20 19:57:39 fuzzer started 2023/06/20 19:57:39 dialing manager at localhost:36067 2023/06/20 19:57:39 checking machine... 2023/06/20 19:57:39 checking revisions... [ 42.061950] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:57:39 testing simple program... [ 42.112086] cgroup: Unknown subsys name 'net' [ 42.156420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:57:39 Registers: info registers vcpu 0 RAX=ffff888018d66670 RBX=ffff88806ce3a360 RCX=1ffffffff0ba7c92 RDX=ffff88806ce3a3b8 RSI=0000000000006e25 RDI=ffff88806ce3a390 RBP=ffffffff85616740 RSP=ffff88806ce09d80 R8 =0000000000000000 R9 =ffffffff85616780 R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff88806ce3a3b8 R13=ffff88806ce3a360 R14=ffff88806ce3a370 R15=0000000000000000 RIP=ffffffff813814f0 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8ec78d2900 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=00007f8ec7e8a0b0 CR3=000000000f7d4000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd836d6418 CR3=000000000fc14000 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=2038333a37353a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a37353a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000