syzkaller login: [ 31.227232] BUG: Bad rss-counter state mm:000000000e374ac3 type:MM_FILEPAGES val:33 [ 31.228459] BUG: Bad rss-counter state mm:000000000e374ac3 type:MM_ANONPAGES val:22 [ 31.266308] ================================================================== [ 31.267237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.268144] Read of size 8 at addr ffff888016922228 by task sshd/220 [ 31.268861] [ 31.269066] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.269878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.270794] Call Trace: [ 31.271098] [ 31.271377] dump_stack_lvl+0x91/0xf0 [ 31.271841] print_report+0xcc/0x620 [ 31.272298] ? __virt_addr_valid+0x102/0x340 [ 31.272818] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273392] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.273965] kasan_report+0xbe/0xf0 [ 31.274410] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.274993] vma_interval_tree_remove+0xc75/0xec0 [ 31.275585] vma_prepare+0xc54/0x11a0 [ 31.276032] __split_vma+0x5af/0x950 [ 31.276480] ? __pfx___split_vma+0x10/0x10 [ 31.277024] ? find_held_lock+0x2c/0x110 [ 31.277561] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.278142] ? lock_is_held_type+0x9f/0x120 [ 31.278705] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.279324] ? mtree_range_walk+0x632/0x900 [ 31.279908] ? mas_walk+0x5c7/0x7c0 [ 31.280400] do_vmi_munmap+0x1f1/0x2b0 [ 31.280909] mmap_region+0x1f9/0x2660 [ 31.281404] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.281962] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.282689] ? __pfx_lock_acquire+0x10/0x10 [ 31.283236] ? __pfx_mmap_region+0x10/0x10 [ 31.283806] ? security_mmap_addr+0x7d/0xa0 [ 31.284361] ? get_unmapped_area+0x1f5/0x3f0 [ 31.284939] do_mmap+0x854/0xf00 [ 31.285395] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.285910] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.286501] ksys_mmap_pgoff+0x3af/0x500 [ 31.287029] do_syscall_64+0x3f/0x90 [ 31.287545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288220] RIP: 0033:0x7f44a0ddcd82 [ 31.288703] 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 [ 31.290897] RSP: 002b:00007ffe15b1c488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.291859] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f44a0ddcd82 [ 31.292740] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44a0216000 [ 31.293841] RBP: 00007f44a0216000 R08: 0000000000000009 R09: 0000000000001000 [ 31.294720] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555927407ec0 [ 31.295609] R13: 00007ffe15b1c4a0 R14: 00007ffe15b1c4d0 R15: 00007ffe15b1c830 [ 31.296500] [ 31.296810] [ 31.297035] Allocated by task 213: [ 31.297483] kasan_save_stack+0x22/0x50 [ 31.298013] kasan_set_track+0x25/0x30 [ 31.298529] __kasan_slab_alloc+0x59/0x70 [ 31.299077] kmem_cache_alloc+0x16b/0x370 [ 31.299622] vm_area_dup+0x20/0x160 [ 31.300093] __split_vma+0x170/0x950 [ 31.300580] split_vma+0xc6/0x110 [ 31.301041] mprotect_fixup+0x8d2/0xb30 [ 31.301566] do_mprotect_pkey+0x87e/0xd40 [ 31.302125] __x64_sys_mprotect+0x78/0xc0 [ 31.302675] do_syscall_64+0x3f/0x90 [ 31.303178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.303885] [ 31.304114] Freed by task 213: [ 31.304532] kasan_save_stack+0x22/0x50 [ 31.305064] kasan_set_track+0x25/0x30 [ 31.305585] kasan_save_free_info+0x2b/0x50 [ 31.306151] __kasan_slab_free+0x10a/0x190 [ 31.306712] kmem_cache_free+0x10d/0x4d0 [ 31.307247] rcu_core+0x8c8/0x2860 [ 31.307724] __do_softirq+0x1b7/0x7d4 [ 31.308229] [ 31.308460] Last potentially related work creation: [ 31.309072] kasan_save_stack+0x22/0x50 [ 31.309606] __kasan_record_aux_stack+0x8e/0xa0 [ 31.310207] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.310885] remove_vma+0x139/0x170 [ 31.311380] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.311971] do_vmi_munmap+0x1f1/0x2b0 [ 31.312482] __vm_munmap+0x138/0x3a0 [ 31.312975] __x64_sys_munmap+0x59/0x80 [ 31.313496] do_syscall_64+0x3f/0x90 [ 31.314002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314680] [ 31.314909] The buggy address belongs to the object at ffff8880169221d0 [ 31.314909] which belongs to the cache vm_area_struct of size 168 [ 31.316447] The buggy address is located 88 bytes inside of [ 31.316447] freed 168-byte region [ffff8880169221d0, ffff888016922278) [ 31.317925] [ 31.318154] The buggy address belongs to the physical page: [ 31.318844] page:00000000b1031a5c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16922 [ 31.319989] memcg:ffff88800fdf1501 [ 31.320421] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.321083] page_type: 0xffffffff() [ 31.321545] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.322478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdf1501 [ 31.323426] page dumped because: kasan: bad access detected [ 31.324095] [ 31.324316] Memory state around the buggy address: [ 31.324904] ffff888016922100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.325773] ffff888016922180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.326645] >ffff888016922200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.327520] ^ [ 31.328088] ffff888016922280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.328966] ffff888016922300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.329837] ================================================================== [ 31.331042] Disabling lock debugging due to kernel taint [ 33.537185] BUG: Bad rss-counter state mm:000000004fe088bc type:MM_FILEPAGES val:33 [ 33.538164] BUG: Bad rss-counter state mm:000000004fe088bc type:MM_ANONPAGES val:22 [ 34.130993] BUG: Bad rss-counter state mm:00000000e797d3cf type:MM_FILEPAGES val:33 [ 34.132442] BUG: Bad rss-counter state mm:00000000e797d3cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5868' (ECDSA) to the list of known hosts. 2023/06/20 13:06:41 fuzzer started 2023/06/20 13:06:41 dialing manager at localhost:36067 2023/06/20 13:06:41 checking machine... 2023/06/20 13:06:41 checking revisions... [ 34.799347] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:06:41 testing simple program... [ 34.851252] cgroup: Unknown subsys name 'net' [ 34.891733] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:06:41 Registers: info registers vcpu 0 RAX=ffffffff86148ed0 RBX=0000000000000001 RCX=ffffffff818a8227 RDX=0000000000000000 RSI=ffffffff86148ed0 RDI=ffffffff85e08af4 RBP=ffffffff85e08af8 RSP=ffff8880146775f8 R8 =ffffffff86148ed0 R9 =ffff8880146776d8 R10=0000000000038001 R11=000000000002384c R12=ffffffff85e08af4 R13=ffffffff85e08af4 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 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 00007f9eb896b900 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=00007f9eb7de5220 CR3=000000000c94c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=8989e6c9fac5168100000000000ae988 XMM05=8c47e135a1bc228b0000000000133630 XMM06=4fda316b135da52b00000000001326d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f167acd5618 CR3=0000000019d5a000 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=2030343a36303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a36303a3331203032 XMM08=66207d20737574617473207b20206465 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000