syzkaller login: [ 34.492623] BUG: Bad rss-counter state mm:0000000040ea2cfd type:MM_FILEPAGES val:33 [ 34.493545] BUG: Bad rss-counter state mm:0000000040ea2cfd type:MM_ANONPAGES val:22 [ 34.665441] ================================================================== [ 34.666333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.667267] Read of size 8 at addr ffff888016eb5968 by task sshd/219 [ 34.668046] [ 34.668262] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.669218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.670178] Call Trace: [ 34.670495] [ 34.670842] dump_stack_lvl+0x91/0xf0 [ 34.671383] print_report+0xcc/0x620 [ 34.671872] ? __virt_addr_valid+0x102/0x340 [ 34.672440] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.673163] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.673898] kasan_report+0xbe/0xf0 [ 34.674511] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.675283] vma_interval_tree_remove+0xc75/0xec0 [ 34.676046] vma_prepare+0xc54/0x11a0 [ 34.676661] __split_vma+0x5af/0x950 [ 34.677256] ? __pfx___split_vma+0x10/0x10 [ 34.677929] ? find_held_lock+0x2c/0x110 [ 34.678615] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.679328] ? lock_is_held_type+0x9f/0x120 [ 34.680000] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.680771] ? mtree_range_walk+0x632/0x900 [ 34.681469] ? mas_walk+0x5c7/0x7c0 [ 34.682047] do_vmi_munmap+0x1f1/0x2b0 [ 34.682689] mmap_region+0x1f9/0x2660 [ 34.683300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.683955] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.684794] ? __pfx_lock_acquire+0x10/0x10 [ 34.685342] ? __pfx_mmap_region+0x10/0x10 [ 34.685868] ? security_mmap_addr+0x7d/0xa0 [ 34.686438] ? get_unmapped_area+0x1f5/0x3f0 [ 34.686988] do_mmap+0x854/0xf00 [ 34.687459] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.687961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.688537] ksys_mmap_pgoff+0x3af/0x500 [ 34.689046] do_syscall_64+0x3f/0x90 [ 34.689551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.690205] RIP: 0033:0x7fd60eab5d82 [ 34.690693] 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 [ 34.692884] RSP: 002b:00007ffe8c357598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.693813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd60eab5d82 [ 34.694714] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd60deef000 [ 34.695619] RBP: 00007fd60deef000 R08: 0000000000000009 R09: 0000000000001000 [ 34.696500] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b08329ec0 [ 34.697374] R13: 00007ffe8c3575b0 R14: 00007ffe8c3575e0 R15: 00007ffe8c357940 [ 34.698375] [ 34.698769] [ 34.699059] Allocated by task 212: [ 34.699652] kasan_save_stack+0x22/0x50 [ 34.700349] kasan_set_track+0x25/0x30 [ 34.701029] __kasan_slab_alloc+0x59/0x70 [ 34.701763] kmem_cache_alloc+0x16b/0x370 [ 34.702467] vm_area_dup+0x20/0x160 [ 34.703097] __split_vma+0x170/0x950 [ 34.703729] split_vma+0xc6/0x110 [ 34.704307] mprotect_fixup+0x8d2/0xb30 [ 34.704995] do_mprotect_pkey+0x87e/0xd40 [ 34.705681] __x64_sys_mprotect+0x78/0xc0 [ 34.706406] do_syscall_64+0x3f/0x90 [ 34.707068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.707974] [ 34.708274] Freed by task 212: [ 34.708811] kasan_save_stack+0x22/0x50 [ 34.709489] kasan_set_track+0x25/0x30 [ 34.710183] kasan_save_free_info+0x2b/0x50 [ 34.710935] __kasan_slab_free+0x10a/0x190 [ 34.711696] kmem_cache_free+0x10d/0x4d0 [ 34.712400] rcu_core+0x8c8/0x2860 [ 34.713019] __do_softirq+0x1b7/0x7d4 [ 34.713676] [ 34.713977] Last potentially related work creation: [ 34.714796] kasan_save_stack+0x22/0x50 [ 34.715514] __kasan_record_aux_stack+0x8e/0xa0 [ 34.716325] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.717209] remove_vma+0x139/0x170 [ 34.717836] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.718602] do_vmi_munmap+0x1f1/0x2b0 [ 34.719269] __vm_munmap+0x138/0x3a0 [ 34.719939] __x64_sys_munmap+0x59/0x80 [ 34.720630] do_syscall_64+0x3f/0x90 [ 34.721292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.722180] [ 34.722473] The buggy address belongs to the object at ffff888016eb5910 [ 34.722473] which belongs to the cache vm_area_struct of size 168 [ 34.724232] The buggy address is located 88 bytes inside of [ 34.724232] freed 168-byte region [ffff888016eb5910, ffff888016eb59b8) [ 34.725699] [ 34.725922] The buggy address belongs to the physical page: [ 34.726606] page:00000000c1c81589 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16eb5 [ 34.727767] memcg:ffff88800e0ecc01 [ 34.728212] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.728886] page_type: 0xffffffff() [ 34.729355] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.730321] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0ecc01 [ 34.731257] page dumped because: kasan: bad access detected [ 34.731970] [ 34.732192] Memory state around the buggy address: [ 34.732779] ffff888016eb5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.733667] ffff888016eb5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.734537] >ffff888016eb5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.735420] ^ [ 34.736226] ffff888016eb5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.737106] ffff888016eb5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.737989] ================================================================== [ 34.739116] Disabling lock debugging due to kernel taint [ 37.168342] BUG: Bad rss-counter state mm:000000004c0e63d9 type:MM_FILEPAGES val:33 [ 37.169470] BUG: Bad rss-counter state mm:000000004c0e63d9 type:MM_ANONPAGES val:22 [ 37.653136] BUG: Bad rss-counter state mm:000000006e97f631 type:MM_FILEPAGES val:33 [ 37.654236] BUG: Bad rss-counter state mm:000000006e97f631 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16132' (ECDSA) to the list of known hosts. 2023/06/19 23:28:33 fuzzer started 2023/06/19 23:28:34 dialing manager at localhost:44161 2023/06/19 23:28:34 checking machine... 2023/06/19 23:28:34 checking revisions... [ 38.407311] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:28:34 testing simple program... [ 38.454593] cgroup: Unknown subsys name 'net' [ 38.502253] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:28:30 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135a RSI=ffffffff846000aa RDI=ffff88806ce09b40 RBP=ffff88806ce09b10 RSP=ffff88806ce09a70 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88801477b680 R15=ffff88800dc87300 RIP=ffffffff84532440 RFL=00000286 [--S--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 00007f793aa79900 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=00007fff0c0c0000 CR3=000000001ca06000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f1e4db648a0 CR3=0000000018ce8000 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=2033333a38323a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a38323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000