syzkaller login: [ 28.976486] BUG: Bad rss-counter state mm:0000000055f9c294 type:MM_FILEPAGES val:33 [ 28.977901] BUG: Bad rss-counter state mm:0000000055f9c294 type:MM_ANONPAGES val:22 [ 29.130166] ================================================================== [ 29.131124] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.132129] Read of size 8 at addr ffff88800de45d08 by task sshd/220 [ 29.132953] [ 29.133197] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.134128] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.135173] Call Trace: [ 29.135513] [ 29.135818] dump_stack_lvl+0x91/0xf0 [ 29.136337] print_report+0xcc/0x620 [ 29.136858] ? __virt_addr_valid+0x102/0x340 [ 29.137480] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.138135] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.138797] kasan_report+0xbe/0xf0 [ 29.139316] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.139992] vma_interval_tree_remove+0xc75/0xec0 [ 29.140638] vma_prepare+0xc54/0x11a0 [ 29.141168] __split_vma+0x5af/0x950 [ 29.141676] ? __pfx___split_vma+0x10/0x10 [ 29.142242] ? find_held_lock+0x2c/0x110 [ 29.142813] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.143418] ? lock_is_held_type+0x9f/0x120 [ 29.143988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.144639] ? mtree_range_walk+0x632/0x900 [ 29.145241] ? mas_walk+0x5c7/0x7c0 [ 29.145750] do_vmi_munmap+0x1f1/0x2b0 [ 29.146286] mmap_region+0x1f9/0x2660 [ 29.146820] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.147388] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.148185] ? __pfx_lock_acquire+0x10/0x10 [ 29.148777] ? __pfx_mmap_region+0x10/0x10 [ 29.149379] ? security_mmap_addr+0x7d/0xa0 [ 29.149972] ? get_unmapped_area+0x1f5/0x3f0 [ 29.150581] do_mmap+0x854/0xf00 [ 29.151068] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.151613] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.152237] ksys_mmap_pgoff+0x3af/0x500 [ 29.152800] do_syscall_64+0x3f/0x90 [ 29.153333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.154053] RIP: 0033:0x7f6d681b2d82 [ 29.154567] 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 [ 29.156939] RSP: 002b:00007ffe6c62e948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.157958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d681b2d82 [ 29.158897] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d675ec000 [ 29.159830] RBP: 00007f6d675ec000 R08: 0000000000000009 R09: 0000000000001000 [ 29.160768] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e4351c980 [ 29.161717] R13: 00007ffe6c62e960 R14: 00007ffe6c62e990 R15: 00007ffe6c62ecf0 [ 29.162666] [ 29.162988] [ 29.163224] Allocated by task 213: [ 29.163699] kasan_save_stack+0x22/0x50 [ 29.164257] kasan_set_track+0x25/0x30 [ 29.164807] __kasan_slab_alloc+0x59/0x70 [ 29.165413] kmem_cache_alloc+0x16b/0x370 [ 29.166050] vm_area_dup+0x20/0x160 [ 29.166536] __split_vma+0x170/0x950 [ 29.167037] split_vma+0xc6/0x110 [ 29.167510] mprotect_fixup+0x8d2/0xb30 [ 29.168054] do_mprotect_pkey+0x87e/0xd40 [ 29.168613] __x64_sys_mprotect+0x78/0xc0 [ 29.169175] do_syscall_64+0x3f/0x90 [ 29.169688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.170371] [ 29.170605] Freed by task 213: [ 29.171024] kasan_save_stack+0x22/0x50 [ 29.171570] kasan_set_track+0x25/0x30 [ 29.172093] kasan_save_free_info+0x2b/0x50 [ 29.172661] __kasan_slab_free+0x10a/0x190 [ 29.173237] kmem_cache_free+0x10d/0x4d0 [ 29.173787] rcu_core+0x8c8/0x2860 [ 29.174274] __do_softirq+0x1b7/0x7d4 [ 29.174796] [ 29.175032] Last potentially related work creation: [ 29.175674] kasan_save_stack+0x22/0x50 [ 29.176229] __kasan_record_aux_stack+0x8e/0xa0 [ 29.176860] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.177587] remove_vma+0x139/0x170 [ 29.178087] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.178706] do_vmi_munmap+0x1f1/0x2b0 [ 29.179238] __vm_munmap+0x138/0x3a0 [ 29.179757] __x64_sys_munmap+0x59/0x80 [ 29.180304] do_syscall_64+0x3f/0x90 [ 29.180832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.181549] [ 29.181787] The buggy address belongs to the object at ffff88800de45cb0 [ 29.181787] which belongs to the cache vm_area_struct of size 168 [ 29.183408] The buggy address is located 88 bytes inside of [ 29.183408] freed 168-byte region [ffff88800de45cb0, ffff88800de45d58) [ 29.184967] [ 29.185224] The buggy address belongs to the physical page: [ 29.185947] page:0000000059b406fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde45 [ 29.187131] memcg:ffff88800caeba01 [ 29.187599] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.188309] page_type: 0xffffffff() [ 29.188805] raw: 0100000000000200 ffff88800879fc80 ffffea0000370140 dead000000000008 [ 29.189828] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caeba01 [ 29.191001] page dumped because: kasan: bad access detected [ 29.191736] [ 29.191971] Memory state around the buggy address: [ 29.192613] ffff88800de45c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.193580] ffff88800de45c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.194521] >ffff88800de45d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.195494] ^ [ 29.196115] ffff88800de45d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.197204] ffff88800de45e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.198304] ================================================================== [ 29.199422] Disabling lock debugging due to kernel taint [ 31.659673] BUG: Bad rss-counter state mm:00000000856cac4e type:MM_FILEPAGES val:33 [ 31.660656] BUG: Bad rss-counter state mm:00000000856cac4e type:MM_ANONPAGES val:22 [ 32.209430] BUG: Bad rss-counter state mm:000000006ccbde93 type:MM_FILEPAGES val:33 [ 32.210705] BUG: Bad rss-counter state mm:000000006ccbde93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13190' (ECDSA) to the list of known hosts. 2023/06/20 03:50:13 fuzzer started 2023/06/20 03:50:13 dialing manager at localhost:44161 2023/06/20 03:50:13 checking machine... 2023/06/20 03:50:13 checking revisions... [ 32.856253] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:50:13 testing simple program... [ 32.903762] cgroup: Unknown subsys name 'net' [ 32.946027] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:50:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8614c08e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff8614c092 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000244c3 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=0000000000000005 R15=ffff88806ce09a78 RIP=ffffffff81130b1f 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 00007fe881503900 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=00007fe881aba618 CR3=000000000ee94000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f2f69954790 CR3=000000000d0a0000 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=f87379dc9c8ea5ad8046c62c9af778fa XMM02=0000000000120170eff9b2d0a8fce9cb XMM03=00000000001202402c67c8bc2e329bc3 XMM04=5bae717a7552746d00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134460 XMM06=086a1200b617620b00000000001332c8 XMM07=e042d86d42eb936e0000000000124430 XMM08=649578418e3ba2d10000000000120240 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000