syzkaller login: [ 33.887763] BUG: Bad rss-counter state mm:00000000ff09d0d2 type:MM_FILEPAGES val:33 [ 33.888785] BUG: Bad rss-counter state mm:00000000ff09d0d2 type:MM_ANONPAGES val:22 [ 34.059546] ================================================================== [ 34.060512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.061628] Read of size 8 at addr ffff88800ff71b38 by task sshd/220 [ 34.062442] [ 34.062675] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.063630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.064624] Call Trace: [ 34.064952] [ 34.065249] dump_stack_lvl+0x91/0xf0 [ 34.065824] print_report+0xcc/0x620 [ 34.066322] ? __virt_addr_valid+0x102/0x340 [ 34.066891] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.067530] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.068155] kasan_report+0xbe/0xf0 [ 34.068637] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.069267] vma_interval_tree_remove+0xc75/0xec0 [ 34.069871] vma_prepare+0xc54/0x11a0 [ 34.070387] __split_vma+0x5af/0x950 [ 34.070865] ? __pfx___split_vma+0x10/0x10 [ 34.071396] ? find_held_lock+0x2c/0x110 [ 34.071928] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.072499] ? lock_is_held_type+0x9f/0x120 [ 34.073043] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.073653] ? mtree_range_walk+0x632/0x900 [ 34.074240] ? mas_walk+0x5c7/0x7c0 [ 34.074730] do_vmi_munmap+0x1f1/0x2b0 [ 34.075256] mmap_region+0x1f9/0x2660 [ 34.075758] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.076277] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.077005] ? __pfx_lock_acquire+0x10/0x10 [ 34.077554] ? __pfx_mmap_region+0x10/0x10 [ 34.078102] ? security_mmap_addr+0x7d/0xa0 [ 34.078645] ? get_unmapped_area+0x1f5/0x3f0 [ 34.079209] do_mmap+0x854/0xf00 [ 34.079657] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.080163] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.080736] ksys_mmap_pgoff+0x3af/0x500 [ 34.081265] do_syscall_64+0x3f/0x90 [ 34.081746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.082463] RIP: 0033:0x7fda187fed82 [ 34.082922] 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 [ 34.085059] RSP: 002b:00007ffd9dd58f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.085969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fda187fed82 [ 34.086836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fda17c38000 [ 34.087684] RBP: 00007fda17c38000 R08: 0000000000000009 R09: 0000000000001000 [ 34.088541] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637ea0e4f70 [ 34.089401] R13: 00007ffd9dd58f70 R14: 00007ffd9dd58fa0 R15: 00007ffd9dd59300 [ 34.090278] [ 34.090575] [ 34.090793] Allocated by task 213: [ 34.091226] kasan_save_stack+0x22/0x50 [ 34.091735] kasan_set_track+0x25/0x30 [ 34.092236] __kasan_slab_alloc+0x59/0x70 [ 34.092766] kmem_cache_alloc+0x16b/0x370 [ 34.093290] vm_area_dup+0x20/0x160 [ 34.093762] __split_vma+0x170/0x950 [ 34.094265] split_vma+0xc6/0x110 [ 34.094718] mprotect_fixup+0x8d2/0xb30 [ 34.095226] do_mprotect_pkey+0x87e/0xd40 [ 34.095754] __x64_sys_mprotect+0x78/0xc0 [ 34.096291] do_syscall_64+0x3f/0x90 [ 34.096765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.097427] [ 34.097649] Freed by task 203: [ 34.098067] kasan_save_stack+0x22/0x50 [ 34.098577] kasan_set_track+0x25/0x30 [ 34.099077] kasan_save_free_info+0x2b/0x50 [ 34.099613] __kasan_slab_free+0x10a/0x190 [ 34.100162] kmem_cache_free+0x10d/0x4d0 [ 34.100676] rcu_core+0x8c8/0x2860 [ 34.101128] __do_softirq+0x1b7/0x7d4 [ 34.101610] [ 34.101832] Last potentially related work creation: [ 34.102494] kasan_save_stack+0x22/0x50 [ 34.103017] __kasan_record_aux_stack+0x8e/0xa0 [ 34.103607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.104259] remove_vma+0x139/0x170 [ 34.104716] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.105294] do_vmi_munmap+0x1f1/0x2b0 [ 34.105791] __vm_munmap+0x138/0x3a0 [ 34.106285] __x64_sys_munmap+0x59/0x80 [ 34.106786] do_syscall_64+0x3f/0x90 [ 34.107268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.108016] [ 34.108238] The buggy address belongs to the object at ffff88800ff71ae0 [ 34.108238] which belongs to the cache vm_area_struct of size 168 [ 34.109717] The buggy address is located 88 bytes inside of [ 34.109717] freed 168-byte region [ffff88800ff71ae0, ffff88800ff71b88) [ 34.111124] [ 34.111342] The buggy address belongs to the physical page: [ 34.112010] page:00000000680cc5fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff71 [ 34.113097] memcg:ffff8880146fbd01 [ 34.113527] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.114181] page_type: 0xffffffff() [ 34.114636] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.115556] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880146fbd01 [ 34.116475] page dumped because: kasan: bad access detected [ 34.117140] [ 34.117353] Memory state around the buggy address: [ 34.117932] ffff88800ff71a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.118815] ffff88800ff71a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 34.119666] >ffff88800ff71b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.120527] ^ [ 34.121143] ffff88800ff71b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.122005] ffff88800ff71c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.122892] ================================================================== [ 34.123865] Disabling lock debugging due to kernel taint [ 36.137902] BUG: Bad rss-counter state mm:0000000063b84ae8 type:MM_FILEPAGES val:33 [ 36.139418] BUG: Bad rss-counter state mm:0000000063b84ae8 type:MM_ANONPAGES val:22 [ 36.648458] BUG: Bad rss-counter state mm:00000000c81838fe type:MM_FILEPAGES val:33 [ 36.649649] BUG: Bad rss-counter state mm:00000000c81838fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40657' (ECDSA) to the list of known hosts. 2023/06/20 06:12:26 fuzzer started 2023/06/20 06:12:27 dialing manager at localhost:44161 2023/06/20 06:12:27 checking machine... 2023/06/20 06:12:27 checking revisions... [ 37.455150] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:12:27 testing simple program... [ 37.500163] cgroup: Unknown subsys name 'net' [ 37.535690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:12:23 Registers: info registers vcpu 0 RAX=ffff8880165dfa28 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88801658b680 RSI=ffffffff818c1d5e RDI=0000000000000006 RBP=ffff8880165dfa28 RSP=ffff8880165df950 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000004000 R11=0000000000000000 R12=0000000000000001 R13=dffffc0000000000 R14=00007f99b0000b80 R15=0000000000000000 RIP=ffffffff814c07e0 RFL=00000293 [--S-A-C] 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 00007f99b7972700 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=00007ffe5db133c8 CR3=000000000d962000 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=32313a3630203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036323a3231 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383534 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c58400 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=00007fd64d336020 CR3=000000000d962000 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=2036323a32313a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a32313a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000