syzkaller login: [ 30.544395] BUG: Bad rss-counter state mm:00000000fc92eade type:MM_FILEPAGES val:33 [ 30.545538] BUG: Bad rss-counter state mm:00000000fc92eade type:MM_ANONPAGES val:22 [ 30.585911] ================================================================== [ 30.586969] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.588048] Read of size 8 at addr ffff888019be5a50 by task sshd/218 [ 30.588974] [ 30.589268] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.590317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.591422] Call Trace: [ 30.591749] [ 30.592030] dump_stack_lvl+0x91/0xf0 [ 30.592564] print_report+0xcc/0x620 [ 30.593198] ? __virt_addr_valid+0x102/0x340 [ 30.593754] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.594371] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.594989] kasan_report+0xbe/0xf0 [ 30.595466] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.596092] vma_interval_tree_remove+0xc75/0xec0 [ 30.596740] vma_prepare+0xc54/0x11a0 [ 30.597367] __split_vma+0x5af/0x950 [ 30.597843] ? __pfx___split_vma+0x10/0x10 [ 30.598373] ? find_held_lock+0x2c/0x110 [ 30.598922] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.599647] ? lock_is_held_type+0x9f/0x120 [ 30.600308] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.600934] ? mtree_range_walk+0x632/0x900 [ 30.601486] ? mas_walk+0x5c7/0x7c0 [ 30.601964] do_vmi_munmap+0x1f1/0x2b0 [ 30.602462] mmap_region+0x1f9/0x2660 [ 30.602943] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.603454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.604185] ? __pfx_lock_acquire+0x10/0x10 [ 30.604729] ? __pfx_mmap_region+0x10/0x10 [ 30.605261] ? security_mmap_addr+0x7d/0xa0 [ 30.605798] ? get_unmapped_area+0x1f5/0x3f0 [ 30.606356] do_mmap+0x854/0xf00 [ 30.606795] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.607295] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.607864] ksys_mmap_pgoff+0x3af/0x500 [ 30.608374] do_syscall_64+0x3f/0x90 [ 30.608877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.609533] RIP: 0033:0x7f733b29ed82 [ 30.609992] 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 [ 30.612141] RSP: 002b:00007fffb82605e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.613062] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f733b29ed82 [ 30.613926] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f733a6d8000 [ 30.614787] RBP: 00007f733a6d8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.615649] R10: 0000000000000812 R11: 0000000000000206 R12: 00005557b0a86ec0 [ 30.616505] R13: 00007fffb8260600 R14: 00007fffb8260630 R15: 00007fffb8260990 [ 30.617396] [ 30.617692] [ 30.617905] Allocated by task 211: [ 30.618343] kasan_save_stack+0x22/0x50 [ 30.618849] kasan_set_track+0x25/0x30 [ 30.619356] __kasan_slab_alloc+0x59/0x70 [ 30.619883] kmem_cache_alloc+0x16b/0x370 [ 30.620408] vm_area_dup+0x20/0x160 [ 30.620871] __split_vma+0x170/0x950 [ 30.621340] split_vma+0xc6/0x110 [ 30.621783] mprotect_fixup+0x8d2/0xb30 [ 30.622287] do_mprotect_pkey+0x87e/0xd40 [ 30.622806] __x64_sys_mprotect+0x78/0xc0 [ 30.623330] do_syscall_64+0x3f/0x90 [ 30.623804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.624454] [ 30.624673] Freed by task 202: [ 30.625070] kasan_save_stack+0x22/0x50 [ 30.625579] kasan_set_track+0x25/0x30 [ 30.626069] kasan_save_free_info+0x2b/0x50 [ 30.626604] __kasan_slab_free+0x10a/0x190 [ 30.627142] kmem_cache_free+0x10d/0x4d0 [ 30.627650] rcu_core+0x8c8/0x2860 [ 30.628093] __do_softirq+0x1b7/0x7d4 [ 30.628573] [ 30.628807] Last potentially related work creation: [ 30.629396] kasan_save_stack+0x22/0x50 [ 30.629906] __kasan_record_aux_stack+0x8e/0xa0 [ 30.630484] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.631196] remove_vma+0x139/0x170 [ 30.631653] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.632219] do_vmi_munmap+0x1f1/0x2b0 [ 30.632715] __vm_munmap+0x138/0x3a0 [ 30.633181] __x64_sys_munmap+0x59/0x80 [ 30.633681] do_syscall_64+0x3f/0x90 [ 30.634158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.634809] [ 30.635024] The buggy address belongs to the object at ffff888019be59f8 [ 30.635024] which belongs to the cache vm_area_struct of size 168 [ 30.636510] The buggy address is located 88 bytes inside of [ 30.636510] freed 168-byte region [ffff888019be59f8, ffff888019be5aa0) [ 30.637937] [ 30.638155] The buggy address belongs to the physical page: [ 30.638813] page:00000000be966ed3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19be5 [ 30.639913] memcg:ffff888016cbd701 [ 30.640344] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.641000] page_type: 0xffffffff() [ 30.641459] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.642384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016cbd701 [ 30.643297] page dumped because: kasan: bad access detected [ 30.643960] [ 30.644174] Memory state around the buggy address: [ 30.644768] ffff888019be5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.645635] ffff888019be5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.646493] >ffff888019be5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.647351] ^ [ 30.648051] ffff888019be5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.648922] ffff888019be5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.649790] ================================================================== [ 30.650820] Disabling lock debugging due to kernel taint [ 33.511534] BUG: Bad rss-counter state mm:000000000eadfc0c type:MM_FILEPAGES val:33 [ 33.513258] BUG: Bad rss-counter state mm:000000000eadfc0c type:MM_ANONPAGES val:22 [ 33.930024] BUG: Bad rss-counter state mm:000000004c4fd495 type:MM_FILEPAGES val:33 [ 33.931006] BUG: Bad rss-counter state mm:000000004c4fd495 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26474' (ECDSA) to the list of known hosts. 2023/06/20 23:54:24 fuzzer started 2023/06/20 23:54:24 dialing manager at localhost:36067 2023/06/20 23:54:24 checking machine... 2023/06/20 23:54:24 checking revisions... [ 34.623702] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:54:25 testing simple program... [ 34.671161] cgroup: Unknown subsys name 'net' [ 34.718310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:54:24 Registers: info registers vcpu 0 RAX=ffff8880087e4158 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001f4d801 RSI=ffffffff83c5c643 RDI=ffff888010257730 RBP=ffff88800fa6c000 RSP=ffff888010257588 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888010257728 R15=ffff88801c994000 RIP=ffffffff83c5c6a1 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 00007f28a8317900 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=00007f28a88ce618 CR3=000000000c406000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fccb0c87000 CR3=000000000d74e000 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=dc1cc424ec86b4bf4047a0278183a214 XMM02=000000000011afd0eff9b2d0a8fce9cb XMM03=000000000011b0a02c67c8bc2e329bc3 XMM04=4218783e6f2494bd00000000000ae988 XMM05=751b9502027dc0b900000000001315f8 XMM06=bdf2e299e47b49d50000000000131480 XMM07=e042d86d42eb936e0000000000121cb8 XMM08=d6cdce0305203d63000000000011b0a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000