syzkaller login: [ 67.567925] BUG: Bad rss-counter state mm:0000000034d3927a type:MM_FILEPAGES val:33 [ 67.568949] BUG: Bad rss-counter state mm:0000000034d3927a type:MM_ANONPAGES val:22 [ 67.745057] ================================================================== [ 67.746254] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.747516] Read of size 8 at addr ffff8880145ca6b0 by task sshd/219 [ 67.748443] [ 67.748699] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.749657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.750779] Call Trace: [ 67.751143] [ 67.751477] dump_stack_lvl+0x91/0xf0 [ 67.752036] print_report+0xcc/0x620 [ 67.752588] ? __virt_addr_valid+0x102/0x340 [ 67.753205] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.753911] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.754648] kasan_report+0xbe/0xf0 [ 67.755203] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.755936] vma_interval_tree_remove+0xc75/0xec0 [ 67.756649] vma_prepare+0xc54/0x11a0 [ 67.757211] __split_vma+0x5af/0x950 [ 67.757768] ? __pfx___split_vma+0x10/0x10 [ 67.758416] ? find_held_lock+0x2c/0x110 [ 67.759021] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.759681] ? lock_is_held_type+0x9f/0x120 [ 67.760295] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.760971] ? mtree_range_walk+0x632/0x900 [ 67.761619] ? mas_walk+0x5c7/0x7c0 [ 67.762192] do_vmi_munmap+0x1f1/0x2b0 [ 67.762753] mmap_region+0x1f9/0x2660 [ 67.763308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.763910] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.764751] ? __pfx_lock_acquire+0x10/0x10 [ 67.765374] ? __pfx_mmap_region+0x10/0x10 [ 67.765999] ? security_mmap_addr+0x7d/0xa0 [ 67.766618] ? get_unmapped_area+0x1f5/0x3f0 [ 67.767257] do_mmap+0x854/0xf00 [ 67.767773] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.768359] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.769018] ksys_mmap_pgoff+0x3af/0x500 [ 67.769603] do_syscall_64+0x3f/0x90 [ 67.770166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.770924] RIP: 0033:0x7f48797e5d82 [ 67.771434] 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 [ 67.773912] RSP: 002b:00007ffe6a621968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.774953] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f48797e5d82 [ 67.775950] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4878c1f000 [ 67.776953] RBP: 00007f4878c1f000 R08: 0000000000000009 R09: 0000000000001000 [ 67.777954] R10: 0000000000000812 R11: 0000000000000206 R12: 000055719ae20ec0 [ 67.778915] R13: 00007ffe6a621980 R14: 00007ffe6a6219b0 R15: 00007ffe6a621d10 [ 67.779935] [ 67.780263] [ 67.780505] Allocated by task 212: [ 67.780985] kasan_save_stack+0x22/0x50 [ 67.781582] kasan_set_track+0x25/0x30 [ 67.782180] __kasan_slab_alloc+0x59/0x70 [ 67.782801] kmem_cache_alloc+0x16b/0x370 [ 67.783391] vm_area_dup+0x20/0x160 [ 67.783899] __split_vma+0x170/0x950 [ 67.784425] split_vma+0xc6/0x110 [ 67.784939] mprotect_fixup+0x8d2/0xb30 [ 67.785521] do_mprotect_pkey+0x87e/0xd40 [ 67.786145] __x64_sys_mprotect+0x78/0xc0 [ 67.786741] do_syscall_64+0x3f/0x90 [ 67.787281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.788010] [ 67.788246] Freed by task 202: [ 67.788692] kasan_save_stack+0x22/0x50 [ 67.789320] kasan_set_track+0x25/0x30 [ 67.789880] kasan_save_free_info+0x2b/0x50 [ 67.790498] __kasan_slab_free+0x10a/0x190 [ 67.791108] kmem_cache_free+0x10d/0x4d0 [ 67.791682] rcu_core+0x8c8/0x2860 [ 67.792186] __do_softirq+0x1b7/0x7d4 [ 67.792724] [ 67.792965] Last potentially related work creation: [ 67.793633] kasan_save_stack+0x22/0x50 [ 67.794225] __kasan_record_aux_stack+0x8e/0xa0 [ 67.794883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.795601] remove_vma+0x139/0x170 [ 67.796132] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.796794] do_vmi_munmap+0x1f1/0x2b0 [ 67.797367] __vm_munmap+0x138/0x3a0 [ 67.797916] __x64_sys_munmap+0x59/0x80 [ 67.798516] do_syscall_64+0x3f/0x90 [ 67.799069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.799826] [ 67.800078] The buggy address belongs to the object at ffff8880145ca658 [ 67.800078] which belongs to the cache vm_area_struct of size 168 [ 67.801827] The buggy address is located 88 bytes inside of [ 67.801827] freed 168-byte region [ffff8880145ca658, ffff8880145ca700) [ 67.803507] [ 67.803758] The buggy address belongs to the physical page: [ 67.804545] page:00000000d2ec6e31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145ca [ 67.805848] memcg:ffff88801a074b01 [ 67.806384] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.807151] page_type: 0xffffffff() [ 67.807676] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.808764] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a074b01 [ 67.809844] page dumped because: kasan: bad access detected [ 67.810641] [ 67.810893] Memory state around the buggy address: [ 67.811591] ffff8880145ca580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.812598] ffff8880145ca600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 67.813617] >ffff8880145ca680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.814635] ^ [ 67.815329] ffff8880145ca700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 67.816345] ffff8880145ca780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 67.817354] ================================================================== [ 67.818517] Disabling lock debugging due to kernel taint [ 69.899520] BUG: Bad rss-counter state mm:000000007bacbe0c type:MM_FILEPAGES val:33 [ 69.900684] BUG: Bad rss-counter state mm:000000007bacbe0c type:MM_ANONPAGES val:22 [ 70.448378] BUG: Bad rss-counter state mm:000000009660306a type:MM_FILEPAGES val:33 [ 70.449392] BUG: Bad rss-counter state mm:000000009660306a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29445' (ECDSA) to the list of known hosts. 2023/06/19 19:43:05 fuzzer started 2023/06/19 19:43:05 dialing manager at localhost:44161 2023/06/19 19:43:05 checking machine... 2023/06/19 19:43:05 checking revisions... [ 71.078328] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:43:05 testing simple program... [ 71.128213] cgroup: Unknown subsys name 'net' [ 71.189524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:42:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019c47880 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888019c477e8 RBP=ffff888018e851c0 RSP=ffff888019c47790 R8 =ffff88800d4f0980 R9 =0000000000000000 R10=ffff888019c477e8 R11=ffff8880144f3be0 R12=0000000000000000 R13=ffff888019c47810 R14=ffff888018e851c0 R15=ffff888019c477e8 RIP=ffffffff8450d41a 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 00007eff47e94900 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=00007eff48449650 CR3=000000000e47a000 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=0000000080000000 RBX=00007f90f312b840 RCX=ffffffff8369f794 RDX=ffff88800dd90000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88801595f8d0 RSP=ffff88801595f7b8 R8 =0000000000000007 R9 =0000000000000000 R10=00007f90f312b860 R11=63206e6f69737365 R12=ffff88801595fe60 R13=0000000000000010 R14=0000000000000020 R15=00007f90f312b860 RIP=ffffffff814c07eb RFL=00000206 [-----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 00007f90f312f700 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=00007faf7ad01f30 CR3=00000000164c4000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732034303a3334 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323930 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000