syzkaller login: [ 38.745118] BUG: Bad rss-counter state mm:0000000041be441f type:MM_FILEPAGES val:33 [ 38.745809] BUG: Bad rss-counter state mm:0000000041be441f type:MM_ANONPAGES val:22 [ 38.862440] ================================================================== [ 38.863540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.864680] Read of size 8 at addr ffff88800e3bf6b0 by task sshd/220 [ 38.865614] [ 38.865832] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.866690] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.867676] Call Trace: [ 38.867993] [ 38.868290] dump_stack_lvl+0x91/0xf0 [ 38.868781] print_report+0xcc/0x620 [ 38.869258] ? __virt_addr_valid+0x102/0x340 [ 38.869809] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.870421] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871034] kasan_report+0xbe/0xf0 [ 38.871509] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872128] vma_interval_tree_remove+0xc75/0xec0 [ 38.872756] vma_prepare+0xc54/0x11a0 [ 38.873235] __split_vma+0x5af/0x950 [ 38.873709] ? __pfx___split_vma+0x10/0x10 [ 38.874232] ? find_held_lock+0x2c/0x110 [ 38.874752] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.875313] ? lock_is_held_type+0x9f/0x120 [ 38.875848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.876476] ? mtree_range_walk+0x632/0x900 [ 38.877025] ? mas_walk+0x5c7/0x7c0 [ 38.877501] do_vmi_munmap+0x1f1/0x2b0 [ 38.877994] mmap_region+0x1f9/0x2660 [ 38.878480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.878990] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.879700] ? __pfx_lock_acquire+0x10/0x10 [ 38.880234] ? __pfx_mmap_region+0x10/0x10 [ 38.880765] ? security_mmap_addr+0x7d/0xa0 [ 38.881295] ? get_unmapped_area+0x1f5/0x3f0 [ 38.881843] do_mmap+0x854/0xf00 [ 38.882285] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.882775] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.883330] ksys_mmap_pgoff+0x3af/0x500 [ 38.883832] do_syscall_64+0x3f/0x90 [ 38.884333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.884980] RIP: 0033:0x7f81572f0d82 [ 38.885442] 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 [ 38.887545] RSP: 002b:00007ffec4e0e488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.888456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81572f0d82 [ 38.889305] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f815672a000 [ 38.890141] RBP: 00007f815672a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.890988] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558069985ec0 [ 38.891833] R13: 00007ffec4e0e4a0 R14: 00007ffec4e0e4d0 R15: 00007ffec4e0e830 [ 38.892688] [ 38.892980] [ 38.893192] Allocated by task 213: [ 38.893625] kasan_save_stack+0x22/0x50 [ 38.894129] kasan_set_track+0x25/0x30 [ 38.894621] __kasan_slab_alloc+0x59/0x70 [ 38.895144] kmem_cache_alloc+0x16b/0x370 [ 38.895661] vm_area_dup+0x20/0x160 [ 38.896117] __split_vma+0x170/0x950 [ 38.896608] split_vma+0xc6/0x110 [ 38.897048] mprotect_fixup+0x8d2/0xb30 [ 38.897557] do_mprotect_pkey+0x87e/0xd40 [ 38.898076] __x64_sys_mprotect+0x78/0xc0 [ 38.898602] do_syscall_64+0x3f/0x90 [ 38.899077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899719] [ 38.899936] Freed by task 13: [ 38.900324] kasan_save_stack+0x22/0x50 [ 38.900828] kasan_set_track+0x25/0x30 [ 38.901318] kasan_save_free_info+0x2b/0x50 [ 38.901847] __kasan_slab_free+0x10a/0x190 [ 38.902375] kmem_cache_free+0x10d/0x4d0 [ 38.902894] rcu_core+0x8c8/0x2860 [ 38.903334] __do_softirq+0x1b7/0x7d4 [ 38.903812] [ 38.904031] Last potentially related work creation: [ 38.904636] kasan_save_stack+0x22/0x50 [ 38.905139] __kasan_record_aux_stack+0x8e/0xa0 [ 38.905712] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.906452] remove_vma+0x139/0x170 [ 38.906908] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.907464] do_vmi_munmap+0x1f1/0x2b0 [ 38.907949] __vm_munmap+0x138/0x3a0 [ 38.908423] __x64_sys_munmap+0x59/0x80 [ 38.908919] do_syscall_64+0x3f/0x90 [ 38.909394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910031] [ 38.910244] Second to last potentially related work creation: [ 38.910931] kasan_save_stack+0x22/0x50 [ 38.911435] __kasan_record_aux_stack+0x8e/0xa0 [ 38.912002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.912682] remove_vma+0x139/0x170 [ 38.913128] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.913688] do_vmi_munmap+0x1f1/0x2b0 [ 38.914171] mmap_region+0x1f9/0x2660 [ 38.914646] do_mmap+0x854/0xf00 [ 38.915078] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.915563] ksys_mmap_pgoff+0x3af/0x500 [ 38.916062] do_syscall_64+0x3f/0x90 [ 38.916544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917188] [ 38.917403] The buggy address belongs to the object at ffff88800e3bf658 [ 38.917403] which belongs to the cache vm_area_struct of size 168 [ 38.918863] The buggy address is located 88 bytes inside of [ 38.918863] freed 168-byte region [ffff88800e3bf658, ffff88800e3bf700) [ 38.920273] [ 38.920487] The buggy address belongs to the physical page: [ 38.921198] page:00000000d16ea199 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3bf [ 38.922422] memcg:ffff88800d5f4c01 [ 38.922893] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.923664] page_type: 0xffffffff() [ 38.924176] raw: 0100000000000200 ffff8880087a0c80 ffffea000038c880 dead000000000007 [ 38.925185] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5f4c01 [ 38.926197] page dumped because: kasan: bad access detected [ 38.926941] [ 38.927174] Memory state around the buggy address: [ 38.927819] ffff88800e3bf580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.928780] ffff88800e3bf600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.929748] >ffff88800e3bf680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.930692] ^ [ 38.931349] ffff88800e3bf700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.932326] ffff88800e3bf780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.933277] ================================================================== [ 38.934370] Disabling lock debugging due to kernel taint [ 41.842957] BUG: Bad rss-counter state mm:00000000b097622c type:MM_FILEPAGES val:33 [ 41.844176] BUG: Bad rss-counter state mm:00000000b097622c type:MM_ANONPAGES val:22 [ 42.298525] BUG: Bad rss-counter state mm:00000000f1b6f856 type:MM_FILEPAGES val:33 [ 42.299602] BUG: Bad rss-counter state mm:00000000f1b6f856 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30965' (ECDSA) to the list of known hosts. 2023/06/21 07:15:06 fuzzer started 2023/06/21 07:15:07 dialing manager at localhost:36067 2023/06/21 07:15:07 checking machine... 2023/06/21 07:15:07 checking revisions... [ 43.062641] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:15:07 testing simple program... [ 43.107556] cgroup: Unknown subsys name 'net' [ 43.149022] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:15:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff110033e2f36 RDX=dffffc0000000000 RSI=ffffffff813ad720 RDI=ffff888019f17958 RBP=ffff888019f179b0 RSP=ffff888019f178e8 R8 =0000000000000001 R9 =ffff888019f17998 R10=0000000000038001 R11=0000000000003c0d R12=ffff888019f179b8 R13=ffff888019f179a0 R14=ffff888019f17999 R15=ffff888019f17958 RIP=ffffffff81130706 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 00007fb7f5723900 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=00007fb7f5cda618 CR3=000000001cbaa000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85dbd7f8 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806cf099e0 R8 =ffffffff860d8256 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd7f8 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 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=00007f003c55f430 CR3=000000000c68e000 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=ffd3338cba6a788ebc4f5a573a489ed6 XMM02=000000000011acc0eff9b2d0a8fce9cb XMM03=000000000011ad902c67c8bc2e329bc3 XMM04=9eaa55ac85df4ed400000000000ae988 XMM05=e4cb8bb95a7664b60000000000132fe0 XMM06=edd7f627e809bbd00000000000131e48 XMM07=e042d86d42eb936e0000000000121950 XMM08=bc3c10c2b64b8b7c000000000011ad90 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000