syzkaller login: [ 32.170639] BUG: Bad rss-counter state mm:000000009671abaa type:MM_FILEPAGES val:33 [ 32.171900] BUG: Bad rss-counter state mm:000000009671abaa type:MM_ANONPAGES val:22 [ 32.343882] ================================================================== [ 32.344868] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.345876] Read of size 8 at addr ffff8880169abd08 by task sshd/220 [ 32.346823] [ 32.347066] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.347982] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.349060] Call Trace: [ 32.349413] [ 32.349717] dump_stack_lvl+0x91/0xf0 [ 32.350247] print_report+0xcc/0x620 [ 32.350780] ? __virt_addr_valid+0x102/0x340 [ 32.351376] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.352036] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.352688] kasan_report+0xbe/0xf0 [ 32.353194] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.353853] vma_interval_tree_remove+0xc75/0xec0 [ 32.354499] vma_prepare+0xc54/0x11a0 [ 32.355006] __split_vma+0x5af/0x950 [ 32.355508] ? __pfx___split_vma+0x10/0x10 [ 32.356070] ? find_held_lock+0x2c/0x110 [ 32.356628] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.357232] ? lock_is_held_type+0x9f/0x120 [ 32.357805] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.358460] ? mtree_range_walk+0x632/0x900 [ 32.359052] ? mas_walk+0x5c7/0x7c0 [ 32.359558] do_vmi_munmap+0x1f1/0x2b0 [ 32.360081] mmap_region+0x1f9/0x2660 [ 32.360596] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.361144] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.361907] ? __pfx_lock_acquire+0x10/0x10 [ 32.362509] ? __pfx_mmap_region+0x10/0x10 [ 32.363076] ? security_mmap_addr+0x7d/0xa0 [ 32.363643] ? get_unmapped_area+0x1f5/0x3f0 [ 32.364224] do_mmap+0x854/0xf00 [ 32.364695] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.365225] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.365839] ksys_mmap_pgoff+0x3af/0x500 [ 32.366397] do_syscall_64+0x3f/0x90 [ 32.366924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.367624] RIP: 0033:0x7fa65e3aad82 [ 32.368127] 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 [ 32.370463] RSP: 002b:00007ffeeecf2ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.371446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa65e3aad82 [ 32.372374] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa65d7e4000 [ 32.373279] RBP: 00007fa65d7e4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.374201] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590036caec0 [ 32.375107] R13: 00007ffeeecf2f00 R14: 00007ffeeecf2f30 R15: 00007ffeeecf3290 [ 32.376026] [ 32.376333] [ 32.376563] Allocated by task 213: [ 32.377017] kasan_save_stack+0x22/0x50 [ 32.377555] kasan_set_track+0x25/0x30 [ 32.378082] __kasan_slab_alloc+0x59/0x70 [ 32.378658] kmem_cache_alloc+0x16b/0x370 [ 32.379216] vm_area_dup+0x20/0x160 [ 32.379695] __split_vma+0x170/0x950 [ 32.380193] split_vma+0xc6/0x110 [ 32.380662] mprotect_fixup+0x8d2/0xb30 [ 32.381198] do_mprotect_pkey+0x87e/0xd40 [ 32.381767] __x64_sys_mprotect+0x78/0xc0 [ 32.382336] do_syscall_64+0x3f/0x90 [ 32.382858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.383563] [ 32.383797] Freed by task 213: [ 32.384220] kasan_save_stack+0x22/0x50 [ 32.384764] kasan_set_track+0x25/0x30 [ 32.385309] kasan_save_free_info+0x2b/0x50 [ 32.385890] __kasan_slab_free+0x10a/0x190 [ 32.386473] kmem_cache_free+0x10d/0x4d0 [ 32.387026] rcu_core+0x8c8/0x2860 [ 32.387500] __do_softirq+0x1b7/0x7d4 [ 32.388004] [ 32.388233] Last potentially related work creation: [ 32.388857] kasan_save_stack+0x22/0x50 [ 32.389396] __kasan_record_aux_stack+0x8e/0xa0 [ 32.390021] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.390708] remove_vma+0x139/0x170 [ 32.391185] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.391783] do_vmi_munmap+0x1f1/0x2b0 [ 32.392293] __vm_munmap+0x138/0x3a0 [ 32.392787] __x64_sys_munmap+0x59/0x80 [ 32.393316] do_syscall_64+0x3f/0x90 [ 32.393819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.394506] [ 32.394734] The buggy address belongs to the object at ffff8880169abcb0 [ 32.394734] which belongs to the cache vm_area_struct of size 168 [ 32.396343] The buggy address is located 88 bytes inside of [ 32.396343] freed 168-byte region [ffff8880169abcb0, ffff8880169abd58) [ 32.397881] [ 32.398116] The buggy address belongs to the physical page: [ 32.398846] page:00000000b5c2f80b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169ab [ 32.400043] memcg:ffff888015c2db01 [ 32.400512] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.401213] page_type: 0xffffffff() [ 32.401708] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.402721] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c2db01 [ 32.403716] page dumped because: kasan: bad access detected [ 32.404436] [ 32.404670] Memory state around the buggy address: [ 32.405304] ffff8880169abc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.406238] ffff8880169abc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.407185] >ffff8880169abd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.408119] ^ [ 32.408590] ffff8880169abd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.409515] ffff8880169abe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.410453] ================================================================== [ 32.411639] Disabling lock debugging due to kernel taint [ 34.342843] BUG: Bad rss-counter state mm:0000000092765d00 type:MM_FILEPAGES val:33 [ 34.344037] BUG: Bad rss-counter state mm:0000000092765d00 type:MM_ANONPAGES val:22 [ 34.810840] BUG: Bad rss-counter state mm:0000000072cfa4a3 type:MM_FILEPAGES val:33 [ 34.811780] BUG: Bad rss-counter state mm:0000000072cfa4a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41185' (ECDSA) to the list of known hosts. 2023/06/19 22:23:14 fuzzer started 2023/06/19 22:23:14 dialing manager at localhost:44161 2023/06/19 22:23:14 checking machine... 2023/06/19 22:23:14 checking revisions... [ 35.541930] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:23:14 testing simple program... [ 35.592342] cgroup: Unknown subsys name 'net' [ 35.647674] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:23:13 Registers: info registers vcpu 0 RAX=ffffffff814c8422 RBX=ffffffff85dce77c RCX=ffffffff814c8410 RDX=0000000000000000 RSI=ffffffff860f213c RDI=ffffffff85dce774 RBP=ffffffff85dce77c RSP=ffff88806ce099e0 R8 =ffffffff860f213c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000154e8 R12=ffffffff85dce778 R13=ffffffff85dce774 R14=0000000000000004 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f5280e2e900 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=00007f52813e60b0 CR3=000000000ebf6000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 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=ffff888008c58400 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=00007fc13e7de230 CR3=000000000da1a000 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=b2bce76cec76e4989c42f30f92f98427 XMM02=000000000011de60ec2efd57dc4c00df XMM03=0000000000124890d91bb3ed4a9c1b24 XMM04=4a6754a28537400f00000000000ae988 XMM05=151c62a3bb4b4aa100000000001351c0 XMM06=4fda316b135da52b0000000000134260 XMM07=e042d86d42eb936e0000000000124b10 XMM08=d91bb3ed4a9c1b24000000000011dec0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000