syzkaller login: [ 38.659628] BUG: Bad rss-counter state mm:0000000064d1dac9 type:MM_FILEPAGES val:33 [ 38.661006] BUG: Bad rss-counter state mm:0000000064d1dac9 type:MM_ANONPAGES val:22 [ 38.820030] ================================================================== [ 38.820975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.821935] Read of size 8 at addr ffff88800e831798 by task sshd/221 [ 38.822815] [ 38.823042] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.823923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.824932] Call Trace: [ 38.825261] [ 38.825543] dump_stack_lvl+0x91/0xf0 [ 38.826052] print_report+0xcc/0x620 [ 38.826537] ? __virt_addr_valid+0x102/0x340 [ 38.827087] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.827729] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.828353] kasan_report+0xbe/0xf0 [ 38.828848] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.829471] vma_interval_tree_remove+0xc75/0xec0 [ 38.830089] vma_prepare+0xc54/0x11a0 [ 38.830573] __split_vma+0x5af/0x950 [ 38.831053] ? __pfx___split_vma+0x10/0x10 [ 38.831607] ? find_held_lock+0x2c/0x110 [ 38.832139] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.832708] ? lock_is_held_type+0x9f/0x120 [ 38.833259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.833875] ? mtree_range_walk+0x632/0x900 [ 38.834440] ? mas_walk+0x5c7/0x7c0 [ 38.834925] do_vmi_munmap+0x1f1/0x2b0 [ 38.835433] mmap_region+0x1f9/0x2660 [ 38.835924] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.836438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.837161] ? __pfx_lock_acquire+0x10/0x10 [ 38.837698] ? __pfx_mmap_region+0x10/0x10 [ 38.838251] ? security_mmap_addr+0x7d/0xa0 [ 38.838801] ? get_unmapped_area+0x1f5/0x3f0 [ 38.839396] do_mmap+0x854/0xf00 [ 38.839843] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.840345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.840913] ksys_mmap_pgoff+0x3af/0x500 [ 38.841429] do_syscall_64+0x3f/0x90 [ 38.841919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.842581] RIP: 0033:0x7f251b2e3d82 [ 38.843042] 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 [ 38.845226] RSP: 002b:00007ffc79ca9518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.846184] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f251b2e3d82 [ 38.847046] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f251a71d000 [ 38.847922] RBP: 00007f251a71d000 R08: 0000000000000009 R09: 0000000000001000 [ 38.848762] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c80b41fec0 [ 38.849630] R13: 00007ffc79ca9530 R14: 00007ffc79ca9560 R15: 00007ffc79ca98c0 [ 38.850537] [ 38.850842] [ 38.851067] Allocated by task 214: [ 38.851513] kasan_save_stack+0x22/0x50 [ 38.852026] kasan_set_track+0x25/0x30 [ 38.852521] __kasan_slab_alloc+0x59/0x70 [ 38.853047] kmem_cache_alloc+0x16b/0x370 [ 38.853561] vm_area_dup+0x20/0x160 [ 38.854015] __split_vma+0x170/0x950 [ 38.854487] split_vma+0xc6/0x110 [ 38.854927] mprotect_fixup+0x8d2/0xb30 [ 38.855441] do_mprotect_pkey+0x87e/0xd40 [ 38.855954] __x64_sys_mprotect+0x78/0xc0 [ 38.856473] do_syscall_64+0x3f/0x90 [ 38.856952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.857597] [ 38.857820] Freed by task 214: [ 38.858216] kasan_save_stack+0x22/0x50 [ 38.858729] kasan_set_track+0x25/0x30 [ 38.859221] kasan_save_free_info+0x2b/0x50 [ 38.859773] __kasan_slab_free+0x10a/0x190 [ 38.860306] kmem_cache_free+0x10d/0x4d0 [ 38.860811] rcu_core+0x8c8/0x2860 [ 38.861255] __do_softirq+0x1b7/0x7d4 [ 38.861736] [ 38.861949] Last potentially related work creation: [ 38.862540] kasan_save_stack+0x22/0x50 [ 38.863047] __kasan_record_aux_stack+0x8e/0xa0 [ 38.863634] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.864281] remove_vma+0x139/0x170 [ 38.864734] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.865290] do_vmi_munmap+0x1f1/0x2b0 [ 38.865769] __vm_munmap+0x138/0x3a0 [ 38.866235] __x64_sys_munmap+0x59/0x80 [ 38.866725] do_syscall_64+0x3f/0x90 [ 38.867198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.867853] [ 38.868067] The buggy address belongs to the object at ffff88800e831740 [ 38.868067] which belongs to the cache vm_area_struct of size 168 [ 38.869543] The buggy address is located 88 bytes inside of [ 38.869543] freed 168-byte region [ffff88800e831740, ffff88800e8317e8) [ 38.870947] [ 38.871166] The buggy address belongs to the physical page: [ 38.871852] page:00000000007c0ff1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe831 [ 38.872942] memcg:ffff88800f888f01 [ 38.873371] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.874024] page_type: 0xffffffff() [ 38.874482] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.875400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f888f01 [ 38.876316] page dumped because: kasan: bad access detected [ 38.876984] [ 38.877200] Memory state around the buggy address: [ 38.877783] ffff88800e831680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.878643] ffff88800e831700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.879518] >ffff88800e831780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.880384] ^ [ 38.880884] ffff88800e831800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.881742] ffff88800e831880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.882590] ================================================================== [ 38.883704] Disabling lock debugging due to kernel taint [ 41.531348] BUG: Bad rss-counter state mm:00000000a80e9ddc type:MM_FILEPAGES val:33 [ 41.532325] BUG: Bad rss-counter state mm:00000000a80e9ddc type:MM_ANONPAGES val:22 [ 41.986856] BUG: Bad rss-counter state mm:00000000213fdbdc type:MM_FILEPAGES val:33 [ 41.987887] BUG: Bad rss-counter state mm:00000000213fdbdc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61157' (ECDSA) to the list of known hosts. 2023/06/20 15:45:25 fuzzer started 2023/06/20 15:45:25 dialing manager at localhost:36067 2023/06/20 15:45:25 checking machine... 2023/06/20 15:45:25 checking revisions... [ 42.669595] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:45:25 testing simple program... [ 42.715209] cgroup: Unknown subsys name 'net' [ 42.755631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:45:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fd93a924620 CR3=000000000ea1c000 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=1cbb8a5ca805109a0045d87701b23ee0 XMM02=000000000011b1e0ec2efd57dc4c00df XMM03=0000000000121b804fc7102ca19a24b6 XMM04=bc494ae1458c145400000000000ae988 XMM05=a3f9bc7fec31af4a0000000000132ee0 XMM06=00c3ffa147b8d8570000000000131f80 XMM07=e042d86d42eb936e0000000000121e58 XMM08=4fc7102ca19a24b6000000000011b240 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f7d77d8 RBX=ffff88800e674000 RCX=ffffffff83699f62 RDX=ffffffff83644f00 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88800f7d7770 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800e6741b8 R13=ffff88800f7d78a0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff83699f96 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 00007f6f5484e900 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=000055b832064954 CR3=00000000101d4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000