syzkaller login: [ 30.665960] BUG: Bad rss-counter state mm:0000000084103ab1 type:MM_FILEPAGES val:33 [ 30.667453] BUG: Bad rss-counter state mm:0000000084103ab1 type:MM_ANONPAGES val:22 [ 30.858317] ================================================================== [ 30.859433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.860691] Read of size 8 at addr ffff88800e1d53f8 by task sshd/220 [ 30.861560] [ 30.861798] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.862752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.863812] Call Trace: [ 30.864161] [ 30.864471] dump_stack_lvl+0x91/0xf0 [ 30.865022] print_report+0xcc/0x620 [ 30.865547] ? __virt_addr_valid+0x102/0x340 [ 30.866147] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866814] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.867487] kasan_report+0xbe/0xf0 [ 30.868009] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.868689] vma_interval_tree_remove+0xc75/0xec0 [ 30.869366] vma_prepare+0xc54/0x11a0 [ 30.869895] __split_vma+0x5af/0x950 [ 30.870418] ? __pfx___split_vma+0x10/0x10 [ 30.870994] ? find_held_lock+0x2c/0x110 [ 30.871561] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.872178] ? lock_is_held_type+0x9f/0x120 [ 30.872769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.873440] ? mtree_range_walk+0x632/0x900 [ 30.874050] ? mas_walk+0x5c7/0x7c0 [ 30.874574] do_vmi_munmap+0x1f1/0x2b0 [ 30.875112] mmap_region+0x1f9/0x2660 [ 30.875641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.876198] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.876999] ? __pfx_lock_acquire+0x10/0x10 [ 30.877580] ? __pfx_mmap_region+0x10/0x10 [ 30.878162] ? security_mmap_addr+0x7d/0xa0 [ 30.878745] ? get_unmapped_area+0x1f5/0x3f0 [ 30.879343] do_mmap+0x854/0xf00 [ 30.879821] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.880362] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.881003] ksys_mmap_pgoff+0x3af/0x500 [ 30.881558] do_syscall_64+0x3f/0x90 [ 30.882083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882791] RIP: 0033:0x7f8d013f3d82 [ 30.883294] 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 [ 30.885649] RSP: 002b:00007fff7c55a988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.886638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8d013f3d82 [ 30.887569] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8d0082d000 [ 30.888499] RBP: 00007f8d0082d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.889443] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e95f2df70 [ 30.890368] R13: 00007fff7c55a9a0 R14: 00007fff7c55a9d0 R15: 00007fff7c55ad30 [ 30.891304] [ 30.891625] [ 30.891862] Allocated by task 213: [ 30.892335] kasan_save_stack+0x22/0x50 [ 30.892899] kasan_set_track+0x25/0x30 [ 30.893437] __kasan_slab_alloc+0x59/0x70 [ 30.894008] kmem_cache_alloc+0x16b/0x370 [ 30.894579] vm_area_dup+0x20/0x160 [ 30.895073] __split_vma+0x170/0x950 [ 30.895583] split_vma+0xc6/0x110 [ 30.896060] mprotect_fixup+0x8d2/0xb30 [ 30.896609] do_mprotect_pkey+0x87e/0xd40 [ 30.897187] __x64_sys_mprotect+0x78/0xc0 [ 30.897760] do_syscall_64+0x3f/0x90 [ 30.898281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.898985] [ 30.899219] Freed by task 213: [ 30.899650] kasan_save_stack+0x22/0x50 [ 30.900200] kasan_set_track+0x25/0x30 [ 30.900741] kasan_save_free_info+0x2b/0x50 [ 30.901352] __kasan_slab_free+0x10a/0x190 [ 30.901938] kmem_cache_free+0x10d/0x4d0 [ 30.902497] rcu_core+0x8c8/0x2860 [ 30.902977] __do_softirq+0x1b7/0x7d4 [ 30.903495] [ 30.903731] Last potentially related work creation: [ 30.904369] kasan_save_stack+0x22/0x50 [ 30.904930] __kasan_record_aux_stack+0x8e/0xa0 [ 30.905555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.906263] remove_vma+0x139/0x170 [ 30.906756] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.907364] do_vmi_munmap+0x1f1/0x2b0 [ 30.907897] __vm_munmap+0x138/0x3a0 [ 30.908403] __x64_sys_munmap+0x59/0x80 [ 30.908957] do_syscall_64+0x3f/0x90 [ 30.909473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.910178] [ 30.910413] Second to last potentially related work creation: [ 30.911166] kasan_save_stack+0x22/0x50 [ 30.911714] __kasan_record_aux_stack+0x8e/0xa0 [ 30.912337] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.913049] remove_vma+0x139/0x170 [ 30.913542] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.914146] do_vmi_munmap+0x1f1/0x2b0 [ 30.914680] mmap_region+0x1f9/0x2660 [ 30.915197] do_mmap+0x854/0xf00 [ 30.915667] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.916202] ksys_mmap_pgoff+0x3af/0x500 [ 30.916756] do_syscall_64+0x3f/0x90 [ 30.917288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.917996] [ 30.918231] The buggy address belongs to the object at ffff88800e1d53a0 [ 30.918231] which belongs to the cache vm_area_struct of size 168 [ 30.919847] The buggy address is located 88 bytes inside of [ 30.919847] freed 168-byte region [ffff88800e1d53a0, ffff88800e1d5448) [ 30.921402] [ 30.921637] The buggy address belongs to the physical page: [ 30.922358] page:00000000cc2c1b7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1d5 [ 30.923546] memcg:ffff88800b97a601 [ 30.924016] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.924729] page_type: 0xffffffff() [ 30.925236] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.926248] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b97a601 [ 30.927252] page dumped because: kasan: bad access detected [ 30.927990] [ 30.928230] Memory state around the buggy address: [ 30.928874] ffff88800e1d5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.929821] ffff88800e1d5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.930757] >ffff88800e1d5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.931686] ^ [ 30.932611] ffff88800e1d5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.933560] ffff88800e1d5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.934497] ================================================================== [ 30.935640] Disabling lock debugging due to kernel taint [ 32.725684] BUG: Bad rss-counter state mm:0000000076ccff31 type:MM_FILEPAGES val:33 [ 32.726701] BUG: Bad rss-counter state mm:0000000076ccff31 type:MM_ANONPAGES val:22 [ 33.114060] BUG: Bad rss-counter state mm:000000003f419585 type:MM_FILEPAGES val:33 [ 33.115041] BUG: Bad rss-counter state mm:000000003f419585 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60322' (ECDSA) to the list of known hosts. 2023/06/20 21:48:51 fuzzer started 2023/06/20 21:48:51 dialing manager at localhost:36067 2023/06/20 21:48:51 checking machine... 2023/06/20 21:48:51 checking revisions... [ 33.723846] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:48:52 testing simple program... [ 33.757039] cgroup: Unknown subsys name 'net' [ 33.791791] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:48:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---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 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=00007f10252a8bb0 CR3=0000000013e98000 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=69045811f1c21fb9e340c1dbb168c10a XMM02=ec2efd57dc4c00df000000000011acd0 XMM03=a64323ed473caddd000000000011ada0 XMM04=9e1a193baa86d62900000000000ae988 XMM05=19e9129bd510f2350000000000132cf8 XMM06=d04d50c4f0a0b56d0000000000131b60 XMM07=e042d86d42eb936e0000000000121da0 XMM08=a64323ed473caddd000000000011ada0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100131c91d RBX=ffff8880098e48b8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880098e48e8 RBP=ffff88801919c000 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff888019195f80 R14=ffffffff818d9c06 R15=ffff88800db20d80 RIP=ffffffff818464ec 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3bf99c9900 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=00007f3bf9a8650c CR3=0000000019f02000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000