syzkaller login: [ 23.629845] BUG: Bad rss-counter state mm:000000001cdb0009 type:MM_FILEPAGES val:33 [ 23.630871] BUG: Bad rss-counter state mm:000000001cdb0009 type:MM_ANONPAGES val:22 [ 23.788434] ================================================================== [ 23.789523] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.790660] Read of size 8 at addr ffff88800dc17798 by task sshd/220 [ 23.791663] [ 23.791881] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.792752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.793731] Call Trace: [ 23.794049] [ 23.794333] dump_stack_lvl+0x91/0xf0 [ 23.794840] print_report+0xcc/0x620 [ 23.795339] ? __virt_addr_valid+0x102/0x340 [ 23.795891] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.796514] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.797141] kasan_report+0xbe/0xf0 [ 23.797615] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.798234] vma_interval_tree_remove+0xc75/0xec0 [ 23.798842] vma_prepare+0xc54/0x11a0 [ 23.799319] __split_vma+0x5af/0x950 [ 23.799789] ? __pfx___split_vma+0x10/0x10 [ 23.800315] ? find_held_lock+0x2c/0x110 [ 23.800836] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.801401] ? lock_is_held_type+0x9f/0x120 [ 23.801942] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.802579] ? mtree_range_walk+0x632/0x900 [ 23.803131] ? mas_walk+0x5c7/0x7c0 [ 23.803603] do_vmi_munmap+0x1f1/0x2b0 [ 23.804101] mmap_region+0x1f9/0x2660 [ 23.804583] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.805096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.805804] ? __pfx_lock_acquire+0x10/0x10 [ 23.806336] ? __pfx_mmap_region+0x10/0x10 [ 23.806891] ? security_mmap_addr+0x7d/0xa0 [ 23.807422] ? get_unmapped_area+0x1f5/0x3f0 [ 23.807967] do_mmap+0x854/0xf00 [ 23.808405] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.808899] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.809461] ksys_mmap_pgoff+0x3af/0x500 [ 23.809967] do_syscall_64+0x3f/0x90 [ 23.810464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.811114] RIP: 0033:0x7fb37e2dcd82 [ 23.811571] 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 [ 23.813683] RSP: 002b:00007ffe14dd10e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.814605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb37e2dcd82 [ 23.815451] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb37d716000 [ 23.816297] RBP: 00007fb37d716000 R08: 0000000000000009 R09: 0000000000001000 [ 23.817142] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f71d07bec0 [ 23.817993] R13: 00007ffe14dd1100 R14: 00007ffe14dd1130 R15: 00007ffe14dd1490 [ 23.818859] [ 23.819159] [ 23.819377] Allocated by task 213: [ 23.819802] kasan_save_stack+0x22/0x50 [ 23.820310] kasan_set_track+0x25/0x30 [ 23.820802] __kasan_slab_alloc+0x59/0x70 [ 23.821326] kmem_cache_alloc+0x16b/0x370 [ 23.821839] vm_area_dup+0x20/0x160 [ 23.822292] __split_vma+0x170/0x950 [ 23.822769] split_vma+0xc6/0x110 [ 23.823210] mprotect_fixup+0x8d2/0xb30 [ 23.823717] do_mprotect_pkey+0x87e/0xd40 [ 23.824239] __x64_sys_mprotect+0x78/0xc0 [ 23.824761] do_syscall_64+0x3f/0x90 [ 23.825235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.825875] [ 23.826092] Freed by task 213: [ 23.826499] kasan_save_stack+0x22/0x50 [ 23.826999] kasan_set_track+0x25/0x30 [ 23.827502] kasan_save_free_info+0x2b/0x50 [ 23.828048] __kasan_slab_free+0x10a/0x190 [ 23.828587] kmem_cache_free+0x10d/0x4d0 [ 23.829094] rcu_core+0x8c8/0x2860 [ 23.829539] __do_softirq+0x1b7/0x7d4 [ 23.830018] [ 23.830234] Last potentially related work creation: [ 23.830838] kasan_save_stack+0x22/0x50 [ 23.831342] __kasan_record_aux_stack+0x8e/0xa0 [ 23.831916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.832556] remove_vma+0x139/0x170 [ 23.833015] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.833568] do_vmi_munmap+0x1f1/0x2b0 [ 23.834064] __vm_munmap+0x138/0x3a0 [ 23.834542] __x64_sys_munmap+0x59/0x80 [ 23.835044] do_syscall_64+0x3f/0x90 [ 23.835524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.836167] [ 23.836388] The buggy address belongs to the object at ffff88800dc17740 [ 23.836388] which belongs to the cache vm_area_struct of size 168 [ 23.837842] The buggy address is located 88 bytes inside of [ 23.837842] freed 168-byte region [ffff88800dc17740, ffff88800dc177e8) [ 23.839250] [ 23.839468] The buggy address belongs to the physical page: [ 23.840116] page:000000001ec466e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc17 [ 23.841192] memcg:ffff88800ec75f01 [ 23.841620] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.842261] page_type: 0xffffffff() [ 23.842723] raw: 0100000000000200 ffff8880087a0c80 ffffea000038fb40 dead000000000008 [ 23.843643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec75f01 [ 23.844547] page dumped because: kasan: bad access detected [ 23.845208] [ 23.845424] Memory state around the buggy address: [ 23.845994] ffff88800dc17680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.846860] ffff88800dc17700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.847708] >ffff88800dc17780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.848554] ^ [ 23.849043] ffff88800dc17800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.849890] ffff88800dc17880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.850751] ================================================================== [ 23.851873] Disabling lock debugging due to kernel taint [ 26.187442] BUG: Bad rss-counter state mm:00000000834978f3 type:MM_FILEPAGES val:33 [ 26.188611] BUG: Bad rss-counter state mm:00000000834978f3 type:MM_ANONPAGES val:22 [ 26.610787] BUG: Bad rss-counter state mm:00000000320d641c type:MM_FILEPAGES val:33 [ 26.612070] BUG: Bad rss-counter state mm:00000000320d641c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43024' (ECDSA) to the list of known hosts. 2023/06/21 03:12:41 fuzzer started 2023/06/21 03:12:41 dialing manager at localhost:36067 2023/06/21 03:12:41 checking machine... 2023/06/21 03:12:41 checking revisions... [ 27.371641] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:12:41 testing simple program... [ 27.418786] cgroup: Unknown subsys name 'net' [ 27.462352] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:12:41 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=00000000fcf0e1ca RCX=ffff88806c470e50 RDX=000000000000000e RSI=ffffffff83c208fc RDI=0000000004b9861d RBP=ffff88800ea90cf0 RSP=ffff888017c8f678 R8 =000000008d468357 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888017c8f6e0 R15=000000000000000e RIP=ffffffff822704fc RFL=00000202 [-------] 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 00007fc47820a700 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=00007f6aabbe70b0 CR3=00000000102a4000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32373535342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323735 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=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff8880182b7f60 RSI=ffff8880182b7f48 RDI=ffff8880182b7370 RBP=ffff8880182b7408 RSP=ffff8880182b7368 R8 =0000000000000001 R9 =ffff8880182b73b0 R10=0000000000038001 R11=00000000000b5080 R12=ffff8880182b7438 R13=0000000000000000 R14=ffff888014743680 R15=0000000000002000 RIP=ffffffff81130340 RFL=00000202 [-------] 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 00007f6aab62f900 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=00007f6aabbe6618 CR3=000000001c948000 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=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