syzkaller login: [ 38.757208] BUG: Bad rss-counter state mm:00000000eca43484 type:MM_FILEPAGES val:33 [ 38.758739] BUG: Bad rss-counter state mm:00000000eca43484 type:MM_ANONPAGES val:22 [ 38.896448] ================================================================== [ 38.897578] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.898756] Read of size 8 at addr ffff88800e454228 by task sshd/219 [ 38.899870] [ 38.900140] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.901241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.902475] Call Trace: [ 38.902879] [ 38.903242] dump_stack_lvl+0x91/0xf0 [ 38.903883] print_report+0xcc/0x620 [ 38.904567] ? __virt_addr_valid+0x102/0x340 [ 38.905167] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.905787] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.906413] kasan_report+0xbe/0xf0 [ 38.906896] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907533] vma_interval_tree_remove+0xc75/0xec0 [ 38.908146] vma_prepare+0xc54/0x11a0 [ 38.908626] __split_vma+0x5af/0x950 [ 38.909092] ? __pfx___split_vma+0x10/0x10 [ 38.909625] ? find_held_lock+0x2c/0x110 [ 38.910150] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.910724] ? lock_is_held_type+0x9f/0x120 [ 38.911263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.911893] ? mtree_range_walk+0x632/0x900 [ 38.912458] ? mas_walk+0x5c7/0x7c0 [ 38.912941] do_vmi_munmap+0x1f1/0x2b0 [ 38.913443] mmap_region+0x1f9/0x2660 [ 38.913928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.914572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.915288] ? __pfx_lock_acquire+0x10/0x10 [ 38.915843] ? __pfx_mmap_region+0x10/0x10 [ 38.916388] ? security_mmap_addr+0x7d/0xa0 [ 38.916923] ? get_unmapped_area+0x1f5/0x3f0 [ 38.917473] do_mmap+0x854/0xf00 [ 38.917913] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.918408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.918969] ksys_mmap_pgoff+0x3af/0x500 [ 38.919483] do_syscall_64+0x3f/0x90 [ 38.919965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920608] RIP: 0033:0x7f1f31d4ed82 [ 38.921066] 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 [ 38.923208] RSP: 002b:00007ffd81b239f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.924131] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f31d4ed82 [ 38.924982] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f31188000 [ 38.925834] RBP: 00007f1f31188000 R08: 0000000000000009 R09: 0000000000001000 [ 38.926680] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cad5fd0ec0 [ 38.927539] R13: 00007ffd81b23a10 R14: 00007ffd81b23a40 R15: 00007ffd81b23da0 [ 38.928392] [ 38.928682] [ 38.928898] Allocated by task 212: [ 38.929333] kasan_save_stack+0x22/0x50 [ 38.929840] kasan_set_track+0x25/0x30 [ 38.930338] __kasan_slab_alloc+0x59/0x70 [ 38.930862] kmem_cache_alloc+0x16b/0x370 [ 38.931379] vm_area_dup+0x20/0x160 [ 38.931851] __split_vma+0x170/0x950 [ 38.932334] split_vma+0xc6/0x110 [ 38.932773] mprotect_fixup+0x8d2/0xb30 [ 38.933277] do_mprotect_pkey+0x87e/0xd40 [ 38.933802] __x64_sys_mprotect+0x78/0xc0 [ 38.934324] do_syscall_64+0x3f/0x90 [ 38.934806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935475] [ 38.935693] Freed by task 212: [ 38.936088] kasan_save_stack+0x22/0x50 [ 38.936592] kasan_set_track+0x25/0x30 [ 38.937092] kasan_save_free_info+0x2b/0x50 [ 38.937631] __kasan_slab_free+0x10a/0x190 [ 38.938174] kmem_cache_free+0x10d/0x4d0 [ 38.938698] rcu_core+0x8c8/0x2860 [ 38.939144] __do_softirq+0x1b7/0x7d4 [ 38.939630] [ 38.939845] Last potentially related work creation: [ 38.940504] kasan_save_stack+0x22/0x50 [ 38.941004] __kasan_record_aux_stack+0x8e/0xa0 [ 38.941576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.942214] remove_vma+0x139/0x170 [ 38.942662] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.943222] do_vmi_munmap+0x1f1/0x2b0 [ 38.943721] __vm_munmap+0x138/0x3a0 [ 38.944188] __x64_sys_munmap+0x59/0x80 [ 38.944685] do_syscall_64+0x3f/0x90 [ 38.945170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945818] [ 38.946031] Second to last potentially related work creation: [ 38.946710] kasan_save_stack+0x22/0x50 [ 38.947217] __kasan_record_aux_stack+0x8e/0xa0 [ 38.947811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.948460] remove_vma+0x139/0x170 [ 38.948911] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.949473] do_vmi_munmap+0x1f1/0x2b0 [ 38.949963] mmap_region+0x1f9/0x2660 [ 38.950439] do_mmap+0x854/0xf00 [ 38.950866] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.951355] ksys_mmap_pgoff+0x3af/0x500 [ 38.951871] do_syscall_64+0x3f/0x90 [ 38.952354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.953001] [ 38.953217] The buggy address belongs to the object at ffff88800e4541d0 [ 38.953217] which belongs to the cache vm_area_struct of size 168 [ 38.954692] The buggy address is located 88 bytes inside of [ 38.954692] freed 168-byte region [ffff88800e4541d0, ffff88800e454278) [ 38.956101] [ 38.956314] The buggy address belongs to the physical page: [ 38.956977] page:00000000930db231 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe454 [ 38.958064] memcg:ffff88800eb73701 [ 38.958490] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.959134] page_type: 0xffffffff() [ 38.959603] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.960520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb73701 [ 38.961449] page dumped because: kasan: bad access detected [ 38.962116] [ 38.962332] Memory state around the buggy address: [ 38.962909] ffff88800e454100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.963770] ffff88800e454180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.964609] >ffff88800e454200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.965438] ^ [ 38.965983] ffff88800e454280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.966823] ffff88800e454300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.967665] ================================================================== [ 38.968558] Disabling lock debugging due to kernel taint [ 40.947829] BUG: Bad rss-counter state mm:00000000bd7f5333 type:MM_FILEPAGES val:33 [ 40.949336] BUG: Bad rss-counter state mm:00000000bd7f5333 type:MM_ANONPAGES val:22 [ 41.442800] BUG: Bad rss-counter state mm:000000001847cca6 type:MM_FILEPAGES val:33 [ 41.443809] BUG: Bad rss-counter state mm:000000001847cca6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31999' (ECDSA) to the list of known hosts. 2023/06/20 11:06:01 fuzzer started 2023/06/20 11:06:02 dialing manager at localhost:36067 2023/06/20 11:06:02 checking machine... 2023/06/20 11:06:02 checking revisions... [ 42.180820] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:06:02 testing simple program... [ 42.234313] cgroup: Unknown subsys name 'net' [ 42.290044] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:06:01 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=00007fff557f3478 CR3=0000000005482000 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=00007fecbb044510000055f24b4a7790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d350 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100195efc2 RSP=ffff88800caf7df0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ead58e0 R13=ffffffff8113b7dc R14=0000000000000000 R15=ffff888008459280 RIP=ffffffff8180f036 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd25f708900 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=00007fff4b20f000 CR3=000000000e544000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=5194d0846452293dc24b1edfb68df31c XMM04=9e4e966daa615fa14cb2ba5fe489619f XMM05=000000000000000000000000000000ff XMM06=514e966d6452293d4c4b1e5fb689611c XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000