syzkaller login: [ 38.813952] BUG: Bad rss-counter state mm:000000001737c359 type:MM_FILEPAGES val:33 [ 38.815340] BUG: Bad rss-counter state mm:000000001737c359 type:MM_ANONPAGES val:22 [ 38.908993] ================================================================== [ 38.909703] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.910423] Read of size 8 at addr ffff88800e4153f8 by task sshd/219 [ 38.911005] [ 38.911177] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.911843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.912711] Call Trace: [ 38.912965] [ 38.913187] dump_stack_lvl+0x91/0xf0 [ 38.913566] print_report+0xcc/0x620 [ 38.913939] ? __virt_addr_valid+0x102/0x340 [ 38.914365] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914858] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915348] kasan_report+0xbe/0xf0 [ 38.915708] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.916184] vma_interval_tree_remove+0xc75/0xec0 [ 38.916645] vma_prepare+0xc54/0x11a0 [ 38.917014] __split_vma+0x5af/0x950 [ 38.917372] ? __pfx___split_vma+0x10/0x10 [ 38.917775] ? find_held_lock+0x2c/0x110 [ 38.918174] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.918603] ? lock_is_held_type+0x9f/0x120 [ 38.919018] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.919494] ? mtree_range_walk+0x632/0x900 [ 38.919920] ? mas_walk+0x5c7/0x7c0 [ 38.920303] do_vmi_munmap+0x1f1/0x2b0 [ 38.920711] mmap_region+0x1f9/0x2660 [ 38.921093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.921487] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.922038] ? __pfx_lock_acquire+0x10/0x10 [ 38.922449] ? __pfx_mmap_region+0x10/0x10 [ 38.922853] ? security_mmap_addr+0x7d/0xa0 [ 38.923286] ? get_unmapped_area+0x1f5/0x3f0 [ 38.923707] do_mmap+0x854/0xf00 [ 38.924055] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.924441] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.924895] ksys_mmap_pgoff+0x3af/0x500 [ 38.925281] do_syscall_64+0x3f/0x90 [ 38.925649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.926141] RIP: 0033:0x7ffa15d9ad82 [ 38.926492] 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 [ 38.928141] RSP: 002b:00007ffc34c79928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.928839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa15d9ad82 [ 38.929492] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa151d4000 [ 38.930146] RBP: 00007ffa151d4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.930801] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a0a07d980 [ 38.931462] R13: 00007ffc34c79940 R14: 00007ffc34c79970 R15: 00007ffc34c79cd0 [ 38.932121] [ 38.932350] [ 38.932514] Allocated by task 212: [ 38.932853] kasan_save_stack+0x22/0x50 [ 38.933241] kasan_set_track+0x25/0x30 [ 38.933617] __kasan_slab_alloc+0x59/0x70 [ 38.934023] kmem_cache_alloc+0x16b/0x370 [ 38.934416] vm_area_dup+0x20/0x160 [ 38.934766] __split_vma+0x170/0x950 [ 38.935143] split_vma+0xc6/0x110 [ 38.935483] mprotect_fixup+0x8d2/0xb30 [ 38.935871] do_mprotect_pkey+0x87e/0xd40 [ 38.936271] __x64_sys_mprotect+0x78/0xc0 [ 38.936674] do_syscall_64+0x3f/0x90 [ 38.937050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.937571] [ 38.937744] Freed by task 203: [ 38.938061] kasan_save_stack+0x22/0x50 [ 38.938466] kasan_set_track+0x25/0x30 [ 38.938858] kasan_save_free_info+0x2b/0x50 [ 38.939280] __kasan_slab_free+0x10a/0x190 [ 38.939687] kmem_cache_free+0x10d/0x4d0 [ 38.940080] rcu_core+0x8c8/0x2860 [ 38.940422] __do_softirq+0x1b7/0x7d4 [ 38.940793] [ 38.940963] Last potentially related work creation: [ 38.941412] kasan_save_stack+0x22/0x50 [ 38.941797] __kasan_record_aux_stack+0x8e/0xa0 [ 38.942237] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.942729] remove_vma+0x139/0x170 [ 38.943080] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.943514] do_vmi_munmap+0x1f1/0x2b0 [ 38.943910] __vm_munmap+0x138/0x3a0 [ 38.944280] __x64_sys_munmap+0x59/0x80 [ 38.944655] do_syscall_64+0x3f/0x90 [ 38.945020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945510] [ 38.945677] The buggy address belongs to the object at ffff88800e4153a0 [ 38.945677] which belongs to the cache vm_area_struct of size 168 [ 38.946870] The buggy address is located 88 bytes inside of [ 38.946870] freed 168-byte region [ffff88800e4153a0, ffff88800e415448) [ 38.948014] [ 38.948189] The buggy address belongs to the physical page: [ 38.948712] page:00000000ff68c455 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe415 [ 38.949588] memcg:ffff8880198ef901 [ 38.949923] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.950447] page_type: 0xffffffff() [ 38.950801] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.951513] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198ef901 [ 38.952243] page dumped because: kasan: bad access detected [ 38.952778] [ 38.952953] Memory state around the buggy address: [ 38.953420] ffff88800e415280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.954098] ffff88800e415300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.954782] >ffff88800e415380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.955446] ^ [ 38.956090] ffff88800e415400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.956748] ffff88800e415480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.957417] ================================================================== [ 38.958341] Disabling lock debugging due to kernel taint [ 40.517879] BUG: Bad rss-counter state mm:000000004a1a7c79 type:MM_FILEPAGES val:33 [ 40.519176] BUG: Bad rss-counter state mm:000000004a1a7c79 type:MM_ANONPAGES val:22 [ 40.961884] BUG: Bad rss-counter state mm:00000000e2348166 type:MM_FILEPAGES val:33 [ 40.963152] BUG: Bad rss-counter state mm:00000000e2348166 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51940' (ECDSA) to the list of known hosts. 2023/06/20 21:17:37 fuzzer started 2023/06/20 21:17:38 dialing manager at localhost:36067 2023/06/20 21:17:38 checking machine... 2023/06/20 21:17:38 checking revisions... [ 41.678903] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:17:38 testing simple program... [ 41.729251] cgroup: Unknown subsys name 'net' [ 41.787690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:17:37 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11002cc0f05 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888016607808 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b935 RFL=00000247 [---Z-PC] 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 00007f87afcb5900 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=00007f87b026d0b0 CR3=0000000016524000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f25c91667e0 CR3=000000000c842000 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=b639365438aaaea93746c66223299537 XMM02=2c67c8bc2e329bc3000000000011bed0 XMM03=fb795ef6d657705600000000001220d8 XMM04=61dd58172d39e55d00000000000ae988 XMM05=dfcdbad4f1609c370000000000131bf8 XMM06=00445bdc4ca69e530000000000130dd0 XMM07=e042d86d42eb936e00000000001223b0 XMM08=b0d011962a8becb2000000000011bf30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000