syzkaller login: [ 23.766374] BUG: Bad rss-counter state mm:00000000e2a939fb type:MM_FILEPAGES val:33 [ 23.767805] BUG: Bad rss-counter state mm:00000000e2a939fb type:MM_ANONPAGES val:22 [ 23.917025] ================================================================== [ 23.918125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.919259] Read of size 8 at addr ffff88800ced2140 by task sshd/220 [ 23.920296] [ 23.920530] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.921387] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.922368] Call Trace: [ 23.922689] [ 23.922971] dump_stack_lvl+0x91/0xf0 [ 23.923457] print_report+0xcc/0x620 [ 23.923938] ? __virt_addr_valid+0x102/0x340 [ 23.924485] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.925101] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.925714] kasan_report+0xbe/0xf0 [ 23.926194] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.926809] vma_interval_tree_remove+0xc75/0xec0 [ 23.927405] vma_prepare+0xc54/0x11a0 [ 23.927879] __split_vma+0x5af/0x950 [ 23.928348] ? __pfx___split_vma+0x10/0x10 [ 23.928901] ? find_held_lock+0x2c/0x110 [ 23.929418] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.929974] ? lock_is_held_type+0x9f/0x120 [ 23.930506] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.931113] ? mtree_range_walk+0x632/0x900 [ 23.931665] ? mas_walk+0x5c7/0x7c0 [ 23.932141] do_vmi_munmap+0x1f1/0x2b0 [ 23.932644] mmap_region+0x1f9/0x2660 [ 23.933127] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.933635] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.934347] ? __pfx_lock_acquire+0x10/0x10 [ 23.934885] ? __pfx_mmap_region+0x10/0x10 [ 23.935411] ? security_mmap_addr+0x7d/0xa0 [ 23.935937] ? get_unmapped_area+0x1f5/0x3f0 [ 23.936498] do_mmap+0x854/0xf00 [ 23.936942] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.937435] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.937994] ksys_mmap_pgoff+0x3af/0x500 [ 23.938494] do_syscall_64+0x3f/0x90 [ 23.938973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.939621] RIP: 0033:0x7f74bbf3ed82 [ 23.940074] 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 [ 23.942209] RSP: 002b:00007ffd76ff2d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.943118] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74bbf3ed82 [ 23.943963] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74bb378000 [ 23.944827] RBP: 00007f74bb378000 R08: 0000000000000009 R09: 0000000000001000 [ 23.945679] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616072ead90 [ 23.946521] R13: 00007ffd76ff2d20 R14: 00007ffd76ff2d50 R15: 00007ffd76ff30b0 [ 23.947372] [ 23.947659] [ 23.947873] Allocated by task 213: [ 23.948303] kasan_save_stack+0x22/0x50 [ 23.948850] kasan_set_track+0x25/0x30 [ 23.949369] __kasan_slab_alloc+0x59/0x70 [ 23.949918] kmem_cache_alloc+0x16b/0x370 [ 23.950429] vm_area_dup+0x20/0x160 [ 23.950885] __split_vma+0x170/0x950 [ 23.951353] split_vma+0xc6/0x110 [ 23.951794] mprotect_fixup+0x8d2/0xb30 [ 23.952295] do_mprotect_pkey+0x87e/0xd40 [ 23.952833] __x64_sys_mprotect+0x78/0xc0 [ 23.953348] do_syscall_64+0x3f/0x90 [ 23.953824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.954473] [ 23.954689] Freed by task 213: [ 23.955080] kasan_save_stack+0x22/0x50 [ 23.955574] kasan_set_track+0x25/0x30 [ 23.956067] kasan_save_free_info+0x2b/0x50 [ 23.956620] __kasan_slab_free+0x10a/0x190 [ 23.957148] kmem_cache_free+0x10d/0x4d0 [ 23.957650] rcu_core+0x8c8/0x2860 [ 23.958093] __do_softirq+0x1b7/0x7d4 [ 23.958624] [ 23.958836] Last potentially related work creation: [ 23.959420] kasan_save_stack+0x22/0x50 [ 23.959923] __kasan_record_aux_stack+0x8e/0xa0 [ 23.960582] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.961212] remove_vma+0x139/0x170 [ 23.961663] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.962219] do_vmi_munmap+0x1f1/0x2b0 [ 23.962707] __vm_munmap+0x138/0x3a0 [ 23.963197] __x64_sys_munmap+0x59/0x80 [ 23.963686] do_syscall_64+0x3f/0x90 [ 23.964163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.964828] [ 23.965048] Second to last potentially related work creation: [ 23.965724] kasan_save_stack+0x22/0x50 [ 23.966220] __kasan_record_aux_stack+0x8e/0xa0 [ 23.966786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.967427] remove_vma+0x139/0x170 [ 23.967873] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.968426] do_vmi_munmap+0x1f1/0x2b0 [ 23.968923] mmap_region+0x1f9/0x2660 [ 23.969396] do_mmap+0x854/0xf00 [ 23.969826] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.970319] ksys_mmap_pgoff+0x3af/0x500 [ 23.970822] do_syscall_64+0x3f/0x90 [ 23.971296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.971929] [ 23.972144] The buggy address belongs to the object at ffff88800ced20e8 [ 23.972144] which belongs to the cache vm_area_struct of size 168 [ 23.973600] The buggy address is located 88 bytes inside of [ 23.973600] freed 168-byte region [ffff88800ced20e8, ffff88800ced2190) [ 23.974985] [ 23.975221] The buggy address belongs to the physical page: [ 23.975872] page:000000009bd6d20a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xced2 [ 23.976947] memcg:ffff88800c867501 [ 23.977373] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.978069] page_type: 0xffffffff() [ 23.978514] raw: 0100000000000200 ffff8880087a0c80 ffffea00003738c0 dead000000000005 [ 23.979434] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c867501 [ 23.980338] page dumped because: kasan: bad access detected [ 23.981014] [ 23.981229] Memory state around the buggy address: [ 23.981806] ffff88800ced2000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.982657] ffff88800ced2080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 23.983507] >ffff88800ced2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.984355] ^ [ 23.984993] ffff88800ced2180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 23.985840] ffff88800ced2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.986687] ================================================================== [ 23.987800] Disabling lock debugging due to kernel taint [ 26.000304] BUG: Bad rss-counter state mm:00000000fefc7cd5 type:MM_FILEPAGES val:33 [ 26.001353] BUG: Bad rss-counter state mm:00000000fefc7cd5 type:MM_ANONPAGES val:22 [ 26.582489] BUG: Bad rss-counter state mm:000000003eb89231 type:MM_FILEPAGES val:33 [ 26.583668] BUG: Bad rss-counter state mm:000000003eb89231 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3331' (ECDSA) to the list of known hosts. 2023/06/20 15:07:30 fuzzer started 2023/06/20 15:07:30 dialing manager at localhost:36067 2023/06/20 15:07:30 checking machine... 2023/06/20 15:07:30 checking revisions... [ 27.278479] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:07:30 testing simple program... [ 27.326721] cgroup: Unknown subsys name 'net' [ 27.370799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:07:29 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=0000000000000001 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=00007ffda8497558 CR3=0000000005482000 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=00007f15ef710510000055d1f68f5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88806cf09a98 RSI=ffffffff83640612 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a84f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880094a8000 R15=ffff88806cf09a98 RIP=ffffffff811305e8 RFL=00000202 [-------] 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 00007efca8552900 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=00007efca8b09618 CR3=000000000f36c000 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