syzkaller login: [ 30.806049] BUG: Bad rss-counter state mm:00000000575a4b34 type:MM_FILEPAGES val:33 [ 30.806981] BUG: Bad rss-counter state mm:00000000575a4b34 type:MM_ANONPAGES val:22 [ 30.949521] ================================================================== [ 30.950288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.951025] Read of size 8 at addr ffff88800f69c798 by task sshd/220 [ 30.951641] [ 30.951812] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.952479] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.953361] Call Trace: [ 30.953623] <TASK> [ 30.953844] dump_stack_lvl+0x91/0xf0 [ 30.954227] print_report+0xcc/0x620 [ 30.954614] ? __virt_addr_valid+0x102/0x340 [ 30.955252] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956092] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.956911] kasan_report+0xbe/0xf0 [ 30.957542] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.958382] vma_interval_tree_remove+0xc75/0xec0 [ 30.959185] vma_prepare+0xc54/0x11a0 [ 30.959836] __split_vma+0x5af/0x950 [ 30.960464] ? __pfx___split_vma+0x10/0x10 [ 30.961170] ? find_held_lock+0x2c/0x110 [ 30.961881] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.962636] ? lock_is_held_type+0x9f/0x120 [ 30.963361] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.964199] ? mtree_range_walk+0x632/0x900 [ 30.964898] ? mas_walk+0x5c7/0x7c0 [ 30.965449] do_vmi_munmap+0x1f1/0x2b0 [ 30.966011] mmap_region+0x1f9/0x2660 [ 30.966555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.967151] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.967987] ? __pfx_lock_acquire+0x10/0x10 [ 30.968602] ? __pfx_mmap_region+0x10/0x10 [ 30.969199] ? security_mmap_addr+0x7d/0xa0 [ 30.969789] ? get_unmapped_area+0x1f5/0x3f0 [ 30.970410] do_mmap+0x854/0xf00 [ 30.970896] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.971447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.972092] ksys_mmap_pgoff+0x3af/0x500 [ 30.972682] do_syscall_64+0x3f/0x90 [ 30.973217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.973935] RIP: 0033:0x7f4375827d82 [ 30.974441] 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 [ 30.976825] RSP: 002b:00007ffc65832488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.977830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4375827d82 [ 30.978803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4374c61000 [ 30.979784] RBP: 00007f4374c61000 R08: 0000000000000009 R09: 0000000000001000 [ 30.980758] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555dc9043f70 [ 30.981729] R13: 00007ffc658324a0 R14: 00007ffc658324d0 R15: 00007ffc65832830 [ 30.982709] </TASK> [ 30.983045] [ 30.983290] Allocated by task 213: [ 30.983787] kasan_save_stack+0x22/0x50 [ 30.984360] kasan_set_track+0x25/0x30 [ 30.984921] __kasan_slab_alloc+0x59/0x70 [ 30.985525] kmem_cache_alloc+0x16b/0x370 [ 30.986123] vm_area_dup+0x20/0x160 [ 30.986642] __split_vma+0x170/0x950 [ 30.987181] split_vma+0xc6/0x110 [ 30.987699] mprotect_fixup+0x8d2/0xb30 [ 30.988285] do_mprotect_pkey+0x87e/0xd40 [ 30.988885] __x64_sys_mprotect+0x78/0xc0 [ 30.989487] do_syscall_64+0x3f/0x90 [ 30.990031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.990773] [ 30.991021] Freed by task 213: [ 30.991471] kasan_save_stack+0x22/0x50 [ 30.992055] kasan_set_track+0x25/0x30 [ 30.992619] kasan_save_free_info+0x2b/0x50 [ 30.993223] __kasan_slab_free+0x10a/0x190 [ 30.993836] kmem_cache_free+0x10d/0x4d0 [ 30.994415] rcu_core+0x8c8/0x2860 [ 30.994919] __do_softirq+0x1b7/0x7d4 [ 30.995463] [ 30.995737] Last potentially related work creation: [ 30.996410] kasan_save_stack+0x22/0x50 [ 30.996993] __kasan_record_aux_stack+0x8e/0xa0 [ 30.997662] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.998398] remove_vma+0x139/0x170 [ 30.998916] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.999555] do_vmi_munmap+0x1f1/0x2b0 [ 31.000134] __vm_munmap+0x138/0x3a0 [ 31.000667] __x64_sys_munmap+0x59/0x80 [ 31.001244] do_syscall_64+0x3f/0x90 [ 31.001793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.002528] [ 31.002777] The buggy address belongs to the object at ffff88800f69c740 [ 31.002777] which belongs to the cache vm_area_struct of size 168 [ 31.004507] The buggy address is located 88 bytes inside of [ 31.004507] freed 168-byte region [ffff88800f69c740, ffff88800f69c7e8) [ 31.006135] [ 31.006383] The buggy address belongs to the physical page: [ 31.007146] page:0000000044f7aa71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf69c [ 31.008393] memcg:ffff88800e763601 [ 31.008887] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.009630] page_type: 0xffffffff() [ 31.010153] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.011209] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e763601 [ 31.012283] page dumped because: kasan: bad access detected [ 31.013053] [ 31.013301] Memory state around the buggy address: [ 31.013974] ffff88800f69c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.014970] ffff88800f69c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.015965] >ffff88800f69c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.016946] ^ [ 31.017518] ffff88800f69c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.018511] ffff88800f69c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.019501] ================================================================== [ 31.020531] Disabling lock debugging due to kernel taint [ 33.014374] BUG: Bad rss-counter state mm:000000007b0233e7 type:MM_FILEPAGES val:33 [ 33.015611] BUG: Bad rss-counter state mm:000000007b0233e7 type:MM_ANONPAGES val:22 [ 33.475792] BUG: Bad rss-counter state mm:000000005e54d772 type:MM_FILEPAGES val:33 [ 33.476988] BUG: Bad rss-counter state mm:000000005e54d772 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48062' (ECDSA) to the list of known hosts. 2023/06/21 05:41:43 fuzzer started 2023/06/21 05:41:44 dialing manager at localhost:36067 2023/06/21 05:41:44 checking machine... 2023/06/21 05:41:44 checking revisions... [ 34.110679] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:41:44 testing simple program... [ 34.143794] cgroup: Unknown subsys name 'net' [ 34.227374] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:41:43 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800fba7c90 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000246 R13=0000000000000000 R14=0000000000000003 R15=ffff88800fba7e28 RIP=ffffffff8180f0a1 RFL=00000086 [--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 00007f8d02c4a900 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=00007f8d03201618 CR3=0000000015a24000 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=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=00007f5a6dc6b350 CR3=000000000ca6a000 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=3b316bf20306aca10b400822803cdd9d XMM02=000000000011d908eff9b2d0a8fce9cb XMM03=000000000011d9d82c67c8bc2e329bc3 XMM04=231a12826810ec1800000000000ae988 XMM05=19e9129bd510f2350000000000131f08 XMM06=4fda316b135da52b0000000000131d90 XMM07=e042d86d42eb936e00000000001222c0 XMM08=f391b7cc76474e94000000000011d9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000