syzkaller login: [ 31.288404] BUG: Bad rss-counter state mm:00000000fe7d7668 type:MM_FILEPAGES val:33 [ 31.289979] BUG: Bad rss-counter state mm:00000000fe7d7668 type:MM_ANONPAGES val:22 [ 31.452269] ================================================================== [ 31.453134] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.454022] Read of size 8 at addr ffff8880196e4228 by task sshd/220 [ 31.454742] [ 31.454956] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.455906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.456820] Call Trace: [ 31.457121] [ 31.457391] dump_stack_lvl+0x91/0xf0 [ 31.457860] print_report+0xcc/0x620 [ 31.458316] ? __virt_addr_valid+0x102/0x340 [ 31.458838] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.459418] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.460025] kasan_report+0xbe/0xf0 [ 31.460477] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.461064] vma_interval_tree_remove+0xc75/0xec0 [ 31.461634] vma_prepare+0xc54/0x11a0 [ 31.462089] __split_vma+0x5af/0x950 [ 31.462532] ? __pfx___split_vma+0x10/0x10 [ 31.463032] ? find_held_lock+0x2c/0x110 [ 31.463529] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.464096] ? lock_is_held_type+0x9f/0x120 [ 31.464633] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.465245] ? mtree_range_walk+0x632/0x900 [ 31.465794] ? mas_walk+0x5c7/0x7c0 [ 31.466272] do_vmi_munmap+0x1f1/0x2b0 [ 31.466759] mmap_region+0x1f9/0x2660 [ 31.467240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.467757] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.468469] ? __pfx_lock_acquire+0x10/0x10 [ 31.469005] ? __pfx_mmap_region+0x10/0x10 [ 31.469543] ? security_mmap_addr+0x7d/0xa0 [ 31.470070] ? get_unmapped_area+0x1f5/0x3f0 [ 31.470616] do_mmap+0x854/0xf00 [ 31.471053] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.471562] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.472117] ksys_mmap_pgoff+0x3af/0x500 [ 31.472617] do_syscall_64+0x3f/0x90 [ 31.473096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.473740] RIP: 0033:0x7f22ac1d8d82 [ 31.474187] 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 [ 31.476311] RSP: 002b:00007ffdced3c358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.477212] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22ac1d8d82 [ 31.478047] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22ab612000 [ 31.478894] RBP: 00007f22ab612000 R08: 0000000000000009 R09: 0000000000001000 [ 31.479727] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aaafe8bb20 [ 31.480526] R13: 00007ffdced3c370 R14: 00007ffdced3c3a0 R15: 00007ffdced3c700 [ 31.481341] [ 31.481621] [ 31.481825] Allocated by task 213: [ 31.482229] kasan_save_stack+0x22/0x50 [ 31.482709] kasan_set_track+0x25/0x30 [ 31.483171] __kasan_slab_alloc+0x59/0x70 [ 31.483673] kmem_cache_alloc+0x16b/0x370 [ 31.484157] vm_area_dup+0x20/0x160 [ 31.484589] __split_vma+0x170/0x950 [ 31.485030] split_vma+0xc6/0x110 [ 31.485445] mprotect_fixup+0x8d2/0xb30 [ 31.485924] do_mprotect_pkey+0x87e/0xd40 [ 31.486415] __x64_sys_mprotect+0x78/0xc0 [ 31.486907] do_syscall_64+0x3f/0x90 [ 31.487368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.487994] [ 31.488203] Freed by task 213: [ 31.488573] kasan_save_stack+0x22/0x50 [ 31.489052] kasan_set_track+0x25/0x30 [ 31.489523] kasan_save_free_info+0x2b/0x50 [ 31.490033] __kasan_slab_free+0x10a/0x190 [ 31.490537] kmem_cache_free+0x10d/0x4d0 [ 31.491045] rcu_core+0x8c8/0x2860 [ 31.491488] __do_softirq+0x1b7/0x7d4 [ 31.491962] [ 31.492178] Last potentially related work creation: [ 31.492753] kasan_save_stack+0x22/0x50 [ 31.493258] __kasan_record_aux_stack+0x8e/0xa0 [ 31.493819] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.494456] remove_vma+0x139/0x170 [ 31.494898] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.495448] do_vmi_munmap+0x1f1/0x2b0 [ 31.495948] __vm_munmap+0x138/0x3a0 [ 31.496409] __x64_sys_munmap+0x59/0x80 [ 31.496892] do_syscall_64+0x3f/0x90 [ 31.497366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.498005] [ 31.498225] The buggy address belongs to the object at ffff8880196e41d0 [ 31.498225] which belongs to the cache vm_area_struct of size 168 [ 31.499673] The buggy address is located 88 bytes inside of [ 31.499673] freed 168-byte region [ffff8880196e41d0, ffff8880196e4278) [ 31.501064] [ 31.501282] The buggy address belongs to the physical page: [ 31.501943] page:0000000007c2d1ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196e4 [ 31.503018] memcg:ffff888016863701 [ 31.503439] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.504098] page_type: 0xffffffff() [ 31.504554] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.505462] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016863701 [ 31.506358] page dumped because: kasan: bad access detected [ 31.507015] [ 31.507234] Memory state around the buggy address: [ 31.507816] ffff8880196e4100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.508667] ffff8880196e4180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.509515] >ffff8880196e4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.510357] ^ [ 31.510896] ffff8880196e4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.511728] ffff8880196e4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.512570] ================================================================== [ 31.513525] Disabling lock debugging due to kernel taint [ 33.757946] BUG: Bad rss-counter state mm:000000004b0cf7f5 type:MM_FILEPAGES val:33 [ 33.758918] BUG: Bad rss-counter state mm:000000004b0cf7f5 type:MM_ANONPAGES val:22 [ 34.180019] BUG: Bad rss-counter state mm:00000000d60c408c type:MM_FILEPAGES val:33 [ 34.180817] BUG: Bad rss-counter state mm:00000000d60c408c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46556' (ECDSA) to the list of known hosts. 2023/06/21 05:06:02 fuzzer started 2023/06/21 05:06:02 dialing manager at localhost:36067 2023/06/21 05:06:02 checking machine... 2023/06/21 05:06:02 checking revisions... [ 34.865970] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:06:02 testing simple program... [ 34.920278] cgroup: Unknown subsys name 'net' [ 34.969595] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:06:02 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffea00003d8100 RDX=0000000000000000 RSI=ffff88800f604e40 RDI=ffffed1001ec09c8 RBP=ffffffff813782f8 RSP=ffff88806ce09e08 R8 =0000000000000130 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800f604e40 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800f604ec0 RIP=ffffffff8180ca2e RFL=00000297 [--S-APC] 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=00007fa50ebd9840 CR3=000000000e740000 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=2031303a36303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016a074f8 RSI=ffff888016a07778 RDI=ffff888016a07500 RBP=0000000000000001 RSP=ffff888016a07440 R8 =0000000000000001 R9 =ffff888016a074f0 R10=0000000000038001 R11=0000000000020c51 R12=ffff888016a07510 R13=ffff888016a074f8 R14=ffff888016a07778 R15=ffff888016a074b0 RIP=ffffffff81131c58 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 00007f31604aa900 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=00007f3160459008 CR3=00000000197ce000 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=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