syzkaller login: [ 55.275802] BUG: Bad rss-counter state mm:0000000011f379a2 type:MM_FILEPAGES val:33 [ 55.277073] BUG: Bad rss-counter state mm:0000000011f379a2 type:MM_ANONPAGES val:22 [ 55.454499] ================================================================== [ 55.455433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.456411] Read of size 8 at addr ffff88800df9cb38 by task sshd/220 [ 55.457310] [ 55.457578] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.458635] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.459964] Call Trace: [ 55.460386] [ 55.460761] dump_stack_lvl+0x91/0xf0 [ 55.461403] print_report+0xcc/0x620 [ 55.462047] ? __virt_addr_valid+0x102/0x340 [ 55.462768] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.463427] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.464076] kasan_report+0xbe/0xf0 [ 55.464601] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.465251] vma_interval_tree_remove+0xc75/0xec0 [ 55.465863] vma_prepare+0xc54/0x11a0 [ 55.466379] __split_vma+0x5af/0x950 [ 55.466878] ? __pfx___split_vma+0x10/0x10 [ 55.467445] ? find_held_lock+0x2c/0x110 [ 55.467968] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.468555] ? lock_is_held_type+0x9f/0x120 [ 55.469106] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.469730] ? mtree_range_walk+0x632/0x900 [ 55.470321] ? mas_walk+0x5c7/0x7c0 [ 55.470805] do_vmi_munmap+0x1f1/0x2b0 [ 55.471334] mmap_region+0x1f9/0x2660 [ 55.471846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.472403] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.473136] ? __pfx_lock_acquire+0x10/0x10 [ 55.473689] ? __pfx_mmap_region+0x10/0x10 [ 55.474259] ? security_mmap_addr+0x7d/0xa0 [ 55.474809] ? get_unmapped_area+0x1f5/0x3f0 [ 55.475374] do_mmap+0x854/0xf00 [ 55.475825] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.476347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.476917] ksys_mmap_pgoff+0x3af/0x500 [ 55.477459] do_syscall_64+0x3f/0x90 [ 55.477983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.478665] RIP: 0033:0x7fa1058c2d82 [ 55.479136] 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 [ 55.481479] RSP: 002b:00007ffd69a0a5f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.482504] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa1058c2d82 [ 55.483401] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa104cfc000 [ 55.484311] RBP: 00007fa104cfc000 R08: 0000000000000009 R09: 0000000000001000 [ 55.485188] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba92359b20 [ 55.486195] R13: 00007ffd69a0a610 R14: 00007ffd69a0a640 R15: 00007ffd69a0a9a0 [ 55.487107] [ 55.487425] [ 55.487651] Allocated by task 213: [ 55.488093] kasan_save_stack+0x22/0x50 [ 55.488646] kasan_set_track+0x25/0x30 [ 55.489157] __kasan_slab_alloc+0x59/0x70 [ 55.489766] kmem_cache_alloc+0x16b/0x370 [ 55.490350] vm_area_dup+0x20/0x160 [ 55.490818] __split_vma+0x170/0x950 [ 55.491315] split_vma+0xc6/0x110 [ 55.491817] mprotect_fixup+0x8d2/0xb30 [ 55.492396] do_mprotect_pkey+0x87e/0xd40 [ 55.492962] __x64_sys_mprotect+0x78/0xc0 [ 55.493528] do_syscall_64+0x3f/0x90 [ 55.494042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.494726] [ 55.494955] Freed by task 213: [ 55.495387] kasan_save_stack+0x22/0x50 [ 55.495966] kasan_set_track+0x25/0x30 [ 55.496531] kasan_save_free_info+0x2b/0x50 [ 55.497088] __kasan_slab_free+0x10a/0x190 [ 55.497671] kmem_cache_free+0x10d/0x4d0 [ 55.498232] rcu_core+0x8c8/0x2860 [ 55.498694] __do_softirq+0x1b7/0x7d4 [ 55.499184] [ 55.499421] Last potentially related work creation: [ 55.500087] kasan_save_stack+0x22/0x50 [ 55.500697] __kasan_record_aux_stack+0x8e/0xa0 [ 55.501334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.502167] remove_vma+0x139/0x170 [ 55.502738] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.503413] do_vmi_munmap+0x1f1/0x2b0 [ 55.503917] __vm_munmap+0x138/0x3a0 [ 55.504386] __x64_sys_munmap+0x59/0x80 [ 55.504911] do_syscall_64+0x3f/0x90 [ 55.505393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.506107] [ 55.506330] Second to last potentially related work creation: [ 55.507044] kasan_save_stack+0x22/0x50 [ 55.507570] __kasan_record_aux_stack+0x8e/0xa0 [ 55.508174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.508841] remove_vma+0x139/0x170 [ 55.509303] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.509902] do_vmi_munmap+0x1f1/0x2b0 [ 55.510418] __vm_munmap+0x138/0x3a0 [ 55.510931] __x64_sys_munmap+0x59/0x80 [ 55.511440] do_syscall_64+0x3f/0x90 [ 55.511944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.512602] [ 55.512824] The buggy address belongs to the object at ffff88800df9cae0 [ 55.512824] which belongs to the cache vm_area_struct of size 168 [ 55.514327] The buggy address is located 88 bytes inside of [ 55.514327] freed 168-byte region [ffff88800df9cae0, ffff88800df9cb88) [ 55.515782] [ 55.516002] The buggy address belongs to the physical page: [ 55.516696] page:00000000327ae82f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf9c [ 55.517790] memcg:ffff88800ce81e01 [ 55.518248] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.518899] page_type: 0xffffffff() [ 55.519358] raw: 0100000000000200 ffff88800879fc80 ffffea0000369600 dead000000000008 [ 55.520282] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce81e01 [ 55.521258] page dumped because: kasan: bad access detected [ 55.521921] [ 55.522152] Memory state around the buggy address: [ 55.522749] ffff88800df9ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.523628] ffff88800df9ca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 55.524496] >ffff88800df9cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.525425] ^ [ 55.526070] ffff88800df9cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 55.526926] ffff88800df9cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 55.527785] ================================================================== [ 55.528875] Disabling lock debugging due to kernel taint [ 57.546666] BUG: Bad rss-counter state mm:0000000053536a99 type:MM_FILEPAGES val:33 [ 57.547856] BUG: Bad rss-counter state mm:0000000053536a99 type:MM_ANONPAGES val:22 [ 58.027535] BUG: Bad rss-counter state mm:00000000d0e51fcc type:MM_FILEPAGES val:33 [ 58.029299] BUG: Bad rss-counter state mm:00000000d0e51fcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41677' (ECDSA) to the list of known hosts. 2023/06/19 17:33:13 fuzzer started 2023/06/19 17:33:13 dialing manager at localhost:44161 2023/06/19 17:33:13 checking machine... 2023/06/19 17:33:13 checking revisions... [ 58.773423] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:33:13 testing simple program... [ 58.822245] cgroup: Unknown subsys name 'net' [ 58.875535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:32:56 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8118dbb1 RSP=ffff88801643f548 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000f7100000f71 R12=0000000000000000 R13=dffffc0000000000 R14=0000000000000000 R15=000000000000000c RIP=ffffffff812d145e RFL=00000046 [---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 00007f07b0c85900 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=00007f07b123c618 CR3=0000000016d90000 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=00007f3de8fb3170 CR3=000000000c930000 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=d515850e001cdb96514fd8f6be8b8315 XMM02=000000000011e6b8eff9b2d0a8fce9cb XMM03=000000000011e7882c67c8bc2e329bc3 XMM04=4e168e3ab54a74a900000000000ae988 XMM05=19e9129bd510f2350000000000135270 XMM06=637352d1e1a9f7c40000000000134448 XMM07=e042d86d42eb936e0000000000124c08 XMM08=8e5746f4ae34c132000000000011e788 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000