syzkaller login: [ 38.329617] BUG: Bad rss-counter state mm:00000000d6efa1ee type:MM_FILEPAGES val:33 [ 38.330881] BUG: Bad rss-counter state mm:00000000d6efa1ee type:MM_ANONPAGES val:22 [ 38.372003] ================================================================== [ 38.373384] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.374841] Read of size 8 at addr ffff88800e105058 by task sshd/219 [ 38.376038] [ 38.376237] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.377046] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.378032] Call Trace: [ 38.378334] [ 38.378590] dump_stack_lvl+0x91/0xf0 [ 38.379058] print_report+0xcc/0x620 [ 38.379496] ? __virt_addr_valid+0x102/0x340 [ 38.379992] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.380553] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.381119] kasan_report+0xbe/0xf0 [ 38.381552] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.382117] vma_interval_tree_remove+0xc75/0xec0 [ 38.382665] vma_prepare+0xc54/0x11a0 [ 38.383100] __split_vma+0x5af/0x950 [ 38.383528] ? __pfx___split_vma+0x10/0x10 [ 38.384011] ? find_held_lock+0x2c/0x110 [ 38.384490] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.385010] ? lock_is_held_type+0x9f/0x120 [ 38.385503] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.386059] ? mtree_range_walk+0x632/0x900 [ 38.386556] ? mas_walk+0x5c7/0x7c0 [ 38.386990] do_vmi_munmap+0x1f1/0x2b0 [ 38.387434] mmap_region+0x1f9/0x2660 [ 38.387876] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.388338] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.389007] ? __pfx_lock_acquire+0x10/0x10 [ 38.389490] ? __pfx_mmap_region+0x10/0x10 [ 38.389971] ? security_mmap_addr+0x7d/0xa0 [ 38.390446] ? get_unmapped_area+0x1f5/0x3f0 [ 38.390944] do_mmap+0x854/0xf00 [ 38.391343] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.391793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.392295] ksys_mmap_pgoff+0x3af/0x500 [ 38.392762] do_syscall_64+0x3f/0x90 [ 38.393196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.393780] RIP: 0033:0x7f04427f9d82 [ 38.394193] 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 [ 38.396108] RSP: 002b:00007ffe3d158738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.396934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04427f9d82 [ 38.397702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0441c33000 [ 38.398465] RBP: 00007f0441c33000 R08: 0000000000000009 R09: 0000000000001000 [ 38.399232] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b414987980 [ 38.399992] R13: 00007ffe3d158750 R14: 00007ffe3d158780 R15: 00007ffe3d158ae0 [ 38.400775] [ 38.401041] [ 38.401234] Allocated by task 212: [ 38.401617] kasan_save_stack+0x22/0x50 [ 38.402073] kasan_set_track+0x25/0x30 [ 38.402517] __kasan_slab_alloc+0x59/0x70 [ 38.402987] kmem_cache_alloc+0x16b/0x370 [ 38.403454] vm_area_dup+0x20/0x160 [ 38.403866] __split_vma+0x170/0x950 [ 38.404288] split_vma+0xc6/0x110 [ 38.404707] mprotect_fixup+0x8d2/0xb30 [ 38.405157] do_mprotect_pkey+0x87e/0xd40 [ 38.405623] __x64_sys_mprotect+0x78/0xc0 [ 38.406087] do_syscall_64+0x3f/0x90 [ 38.406507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.407078] [ 38.407270] Freed by task 212: [ 38.407621] kasan_save_stack+0x22/0x50 [ 38.408073] kasan_set_track+0x25/0x30 [ 38.408517] kasan_save_free_info+0x2b/0x50 [ 38.409006] __kasan_slab_free+0x10a/0x190 [ 38.409494] kmem_cache_free+0x10d/0x4d0 [ 38.409946] rcu_core+0x8c8/0x2860 [ 38.410342] __do_softirq+0x1b7/0x7d4 [ 38.410773] [ 38.410966] Last potentially related work creation: [ 38.411491] kasan_save_stack+0x22/0x50 [ 38.411946] __kasan_record_aux_stack+0x8e/0xa0 [ 38.412463] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.413051] remove_vma+0x139/0x170 [ 38.413460] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.413971] do_vmi_munmap+0x1f1/0x2b0 [ 38.414409] __vm_munmap+0x138/0x3a0 [ 38.414829] __x64_sys_munmap+0x59/0x80 [ 38.415280] do_syscall_64+0x3f/0x90 [ 38.415711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.416289] [ 38.416487] Second to last potentially related work creation: [ 38.417159] kasan_save_stack+0x22/0x50 [ 38.417626] __kasan_record_aux_stack+0x8e/0xa0 [ 38.418139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.418708] remove_vma+0x139/0x170 [ 38.419109] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.419611] do_vmi_munmap+0x1f1/0x2b0 [ 38.420047] __vm_munmap+0x138/0x3a0 [ 38.420460] __x64_sys_munmap+0x59/0x80 [ 38.420913] do_syscall_64+0x3f/0x90 [ 38.421343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.421915] [ 38.422109] The buggy address belongs to the object at ffff88800e105000 [ 38.422109] which belongs to the cache vm_area_struct of size 168 [ 38.423411] The buggy address is located 88 bytes inside of [ 38.423411] freed 168-byte region [ffff88800e105000, ffff88800e1050a8) [ 38.424690] [ 38.424885] The buggy address belongs to the physical page: [ 38.425480] page:000000000c4cc85c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe105 [ 38.426460] memcg:ffff88800f280001 [ 38.426843] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.427420] page_type: 0xffffffff() [ 38.427823] raw: 0100000000000200 ffff88800879fc80 ffffea00005d2500 dead000000000002 [ 38.428652] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f280001 [ 38.429468] page dumped because: kasan: bad access detected [ 38.430069] [ 38.430262] Memory state around the buggy address: [ 38.430784] ffff88800e104f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.431563] ffff88800e104f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.432334] >ffff88800e105000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.433124] ^ [ 38.433778] ffff88800e105080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.434552] ffff88800e105100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.435313] ================================================================== [ 38.436253] Disabling lock debugging due to kernel taint [ 40.674751] BUG: Bad rss-counter state mm:0000000092d09061 type:MM_FILEPAGES val:33 [ 40.675975] BUG: Bad rss-counter state mm:0000000092d09061 type:MM_ANONPAGES val:22 [ 41.074752] BUG: Bad rss-counter state mm:000000003120ee15 type:MM_FILEPAGES val:33 [ 41.075757] BUG: Bad rss-counter state mm:000000003120ee15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12866' (ECDSA) to the list of known hosts. 2023/06/19 17:49:28 fuzzer started 2023/06/19 17:49:28 dialing manager at localhost:44161 2023/06/19 17:49:28 checking machine... 2023/06/19 17:49:28 checking revisions... [ 41.795157] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:49:28 testing simple program... [ 41.844605] cgroup: Unknown subsys name 'net' [ 41.893469] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:49:21 Registers: info registers vcpu 0 RAX=ffffffff8180ee7e RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11002b71ebf RSI=ffffffff8180ee7e RDI=ffff888015b8f668 RBP=ffff888015b8f638 RSP=ffff888015b8f598 R8 =ffffffff8613751e R9 =ffff888015b8f5e0 R10=0000000000038001 R11=0000000000020d8a R12=ffff888015b8f668 R13=0000000000000000 R14=ffff88800faeb680 R15=0000000000000000 RIP=ffffffff813ad420 RFL=00000286 [--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 00007fac2bfff700 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=00007fc1c6c700b0 CR3=000000000c72c000 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=2037323a39343a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a39343a3731203931 XMM08=3d656e696c646d632022656369767265 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=00007fb3e6bf3000 CR3=000000000d724000 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=238e1be019baea99f045cdd179328784 XMM02=2c67c8bc2e329bc3000000000011e628 XMM03=fb795ef6d65770560000000000124b78 XMM04=a574fb7146fb86c300000000000ae988 XMM05=dfcdbad4f1609c370000000000135788 XMM06=cb854f7fc25082c500000000001345f0 XMM07=e042d86d42eb936e0000000000124df8 XMM08=f0cb64a66a62d061000000000011e688 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000