syzkaller login: [ 40.440086] BUG: Bad rss-counter state mm:00000000acff92d2 type:MM_FILEPAGES val:33 [ 40.441058] BUG: Bad rss-counter state mm:00000000acff92d2 type:MM_ANONPAGES val:22 [ 40.603360] ================================================================== [ 40.603978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.604576] Read of size 8 at addr ffff88800c9fa4e0 by task sshd/228 [ 40.605353] [ 40.605507] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.606140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.606818] Call Trace: [ 40.607071] <TASK> [ 40.607261] dump_stack_lvl+0x91/0xf0 [ 40.607595] print_report+0xcc/0x620 [ 40.607928] ? __virt_addr_valid+0x102/0x340 [ 40.608325] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.608718] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.610081] kasan_report+0xbe/0xf0 [ 40.610440] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.610845] vma_interval_tree_remove+0xc75/0xec0 [ 40.611283] vma_prepare+0xc54/0x11a0 [ 40.611615] __split_vma+0x5af/0x950 [ 40.611932] ? __pfx___split_vma+0x10/0x10 [ 40.612445] ? find_held_lock+0x2c/0x110 [ 40.612796] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.613243] ? lock_is_held_type+0x9f/0x120 [ 40.613595] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.613984] ? mtree_range_walk+0x632/0x900 [ 40.614388] ? mas_walk+0x5c7/0x7c0 [ 40.614693] do_vmi_munmap+0x1f1/0x2b0 [ 40.615016] mmap_region+0x1f9/0x2660 [ 40.615385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.615719] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.616322] ? __pfx_lock_acquire+0x10/0x10 [ 40.616674] ? __pfx_mmap_region+0x10/0x10 [ 40.617088] ? security_mmap_addr+0x7d/0xa0 [ 40.617517] ? get_unmapped_area+0x1f5/0x3f0 [ 40.617936] do_mmap+0x854/0xf00 [ 40.618288] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.618615] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.618988] ksys_mmap_pgoff+0x3af/0x500 [ 40.619370] do_syscall_64+0x3f/0x90 [ 40.619685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.620119] RIP: 0033:0x7f5138087d82 [ 40.620543] 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 [ 40.622836] RSP: 002b:00007ffdc085fac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.623601] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5138087d82 [ 40.624321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f51374c1000 [ 40.624873] RBP: 00007f51374c1000 R08: 0000000000000009 R09: 0000000000001000 [ 40.625567] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1d95a7d90 [ 40.626169] R13: 00007ffdc085fae0 R14: 00007ffdc085fb10 R15: 00007ffdc085fe70 [ 40.626745] </TASK> [ 40.627098] [ 40.627293] Allocated by task 219: [ 40.627568] kasan_save_stack+0x22/0x50 [ 40.627897] kasan_set_track+0x25/0x30 [ 40.628382] __kasan_slab_alloc+0x59/0x70 [ 40.628702] kmem_cache_alloc+0x16b/0x370 [ 40.629099] vm_area_dup+0x20/0x160 [ 40.629435] __split_vma+0x170/0x950 [ 40.629727] split_vma+0xc6/0x110 [ 40.630043] mprotect_fixup+0x8d2/0xb30 [ 40.630550] do_mprotect_pkey+0x87e/0xd40 [ 40.630883] __x64_sys_mprotect+0x78/0xc0 [ 40.631275] do_syscall_64+0x3f/0x90 [ 40.631575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.631984] [ 40.632123] Freed by task 219: [ 40.632427] kasan_save_stack+0x22/0x50 [ 40.632751] kasan_set_track+0x25/0x30 [ 40.633146] kasan_save_free_info+0x2b/0x50 [ 40.633534] __kasan_slab_free+0x10a/0x190 [ 40.633893] kmem_cache_free+0x10d/0x4d0 [ 40.634345] rcu_core+0x8c8/0x2860 [ 40.634636] __do_softirq+0x1b7/0x7d4 [ 40.634950] [ 40.635090] Last potentially related work creation: [ 40.635555] kasan_save_stack+0x22/0x50 [ 40.635880] __kasan_record_aux_stack+0x8e/0xa0 [ 40.636354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.636776] remove_vma+0x139/0x170 [ 40.637112] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.637546] do_vmi_munmap+0x1f1/0x2b0 [ 40.637877] __vm_munmap+0x138/0x3a0 [ 40.638305] __x64_sys_munmap+0x59/0x80 [ 40.638655] do_syscall_64+0x3f/0x90 [ 40.638987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.639444] [ 40.639580] The buggy address belongs to the object at ffff88800c9fa488 [ 40.639580] which belongs to the cache vm_area_struct of size 168 [ 40.640552] The buggy address is located 88 bytes inside of [ 40.640552] freed 168-byte region [ffff88800c9fa488, ffff88800c9fa530) [ 40.641551] [ 40.641694] The buggy address belongs to the physical page: [ 40.642140] page:00000000fd630cb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9fa [ 40.642868] memcg:ffff88800ce26f01 [ 40.643139] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.643593] page_type: 0xffffffff() [ 40.643878] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.644564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce26f01 [ 40.645164] page dumped because: kasan: bad access detected [ 40.645664] [ 40.645827] Memory state around the buggy address: [ 40.646442] ffff88800c9fa380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.647065] ffff88800c9fa400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.647712] >ffff88800c9fa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.648340] ^ [ 40.648866] ffff88800c9fa500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.649552] ffff88800c9fa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.650131] ================================================================== [ 40.656854] Disabling lock debugging due to kernel taint [ 45.174260] BUG: Bad rss-counter state mm:0000000040fb015c type:MM_FILEPAGES val:33 [ 45.174928] BUG: Bad rss-counter state mm:0000000040fb015c type:MM_ANONPAGES val:22 [ 45.822939] BUG: Bad rss-counter state mm:0000000040bfd565 type:MM_FILEPAGES val:33 [ 45.824067] BUG: Bad rss-counter state mm:0000000040bfd565 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30965' (ECDSA) to the list of known hosts. 2023/06/20 10:19:15 fuzzer started 2023/06/20 10:19:15 dialing manager at localhost:44161 2023/06/20 10:19:15 checking machine... 2023/06/20 10:19:15 checking revisions... [ 46.683731] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:19:15 testing simple program... [ 46.759726] cgroup: Unknown subsys name 'net' [ 46.845236] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:19:13 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100375ff58 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88801baffab0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d8238 R15=0000000000000000 RIP=ffffffff812d8ed0 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 0000000000000000 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=00007fac56b4c328 CR3=0000000009670000 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=2034313a39313a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a39313a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010002 RBX=ffff88806cf2c240 RCX=0000000000000000 RDX=ffff888008d751c0 RSI=ffffffff813fc3c2 RDI=0000000aa46383a1 RBP=0000000aa46383a1 RSP=ffff88806cf09dc8 R8 =0000000000000006 R9 =0000000aa46383a1 R10=0000000aa43af440 R11=ffff88806cf09ff8 R12=0000000aa43af440 R13=0000000aa43af440 R14=ffff888008e27dc8 R15=dffffc0000000000 RIP=ffffffff813fb8c2 RFL=00000046 [---Z-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 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=00007ffc6917befa CR3=000000000d6e6000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=0ab22ba2563d34d40000000000136748 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=918fffb19f2e437d00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000