syzkaller login: [ 38.824306] BUG: Bad rss-counter state mm:00000000c9abe61f type:MM_FILEPAGES val:33 [ 38.825626] BUG: Bad rss-counter state mm:00000000c9abe61f type:MM_ANONPAGES val:22 [ 38.978675] ================================================================== [ 38.979704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.980938] Read of size 8 at addr ffff88800dbbe798 by task sshd/220 [ 38.981737] [ 38.981962] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.982914] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.984087] Call Trace: [ 38.984472] [ 38.984853] dump_stack_lvl+0x91/0xf0 [ 38.985399] print_report+0xcc/0x620 [ 38.985908] ? __virt_addr_valid+0x102/0x340 [ 38.986500] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.987125] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.987756] kasan_report+0xbe/0xf0 [ 38.988239] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.988870] vma_interval_tree_remove+0xc75/0xec0 [ 38.989489] vma_prepare+0xc54/0x11a0 [ 38.989968] __split_vma+0x5af/0x950 [ 38.990470] ? __pfx___split_vma+0x10/0x10 [ 38.991012] ? find_held_lock+0x2c/0x110 [ 38.991528] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.992127] ? lock_is_held_type+0x9f/0x120 [ 38.992660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.993275] ? mtree_range_walk+0x632/0x900 [ 38.993821] ? mas_walk+0x5c7/0x7c0 [ 38.994317] do_vmi_munmap+0x1f1/0x2b0 [ 38.994811] mmap_region+0x1f9/0x2660 [ 38.995294] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.995815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.996524] ? __pfx_lock_acquire+0x10/0x10 [ 38.997054] ? __pfx_mmap_region+0x10/0x10 [ 38.997593] ? security_mmap_addr+0x7d/0xa0 [ 38.998168] ? get_unmapped_area+0x1f5/0x3f0 [ 38.998713] do_mmap+0x854/0xf00 [ 38.999152] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.999645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.000217] ksys_mmap_pgoff+0x3af/0x500 [ 39.000736] do_syscall_64+0x3f/0x90 [ 39.001213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.001879] RIP: 0033:0x7ff9e8f79d82 [ 39.002427] 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 [ 39.004623] RSP: 002b:00007ffcb08e7218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.005588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9e8f79d82 [ 39.006473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9e83b3000 [ 39.007332] RBP: 00007ff9e83b3000 R08: 0000000000000009 R09: 0000000000001000 [ 39.008213] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ab4aded90 [ 39.009072] R13: 00007ffcb08e7230 R14: 00007ffcb08e7260 R15: 00007ffcb08e75c0 [ 39.009936] [ 39.010262] [ 39.010478] Allocated by task 213: [ 39.010960] kasan_save_stack+0x22/0x50 [ 39.011478] kasan_set_track+0x25/0x30 [ 39.012024] __kasan_slab_alloc+0x59/0x70 [ 39.012615] kmem_cache_alloc+0x16b/0x370 [ 39.013185] vm_area_dup+0x20/0x160 [ 39.013720] __split_vma+0x170/0x950 [ 39.014298] split_vma+0xc6/0x110 [ 39.014833] mprotect_fixup+0x8d2/0xb30 [ 39.015448] do_mprotect_pkey+0x87e/0xd40 [ 39.016069] __x64_sys_mprotect+0x78/0xc0 [ 39.016689] do_syscall_64+0x3f/0x90 [ 39.017242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018982] [ 39.019259] Freed by task 213: [ 39.019733] kasan_save_stack+0x22/0x50 [ 39.020345] kasan_set_track+0x25/0x30 [ 39.020953] kasan_save_free_info+0x2b/0x50 [ 39.021632] __kasan_slab_free+0x10a/0x190 [ 39.022224] kmem_cache_free+0x10d/0x4d0 [ 39.022737] rcu_core+0x8c8/0x2860 [ 39.023182] __do_softirq+0x1b7/0x7d4 [ 39.023674] [ 39.023893] Last potentially related work creation: [ 39.024488] kasan_save_stack+0x22/0x50 [ 39.024999] __kasan_record_aux_stack+0x8e/0xa0 [ 39.025581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.026263] remove_vma+0x139/0x170 [ 39.026718] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.027315] do_vmi_munmap+0x1f1/0x2b0 [ 39.027800] __vm_munmap+0x138/0x3a0 [ 39.028271] __x64_sys_munmap+0x59/0x80 [ 39.028783] do_syscall_64+0x3f/0x90 [ 39.029255] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.029909] [ 39.030183] Second to last potentially related work creation: [ 39.031005] kasan_save_stack+0x22/0x50 [ 39.031514] __kasan_record_aux_stack+0x8e/0xa0 [ 39.032089] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.032782] remove_vma+0x139/0x170 [ 39.033244] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.033817] do_vmi_munmap+0x1f1/0x2b0 [ 39.034351] mmap_region+0x1f9/0x2660 [ 39.034843] do_mmap+0x854/0xf00 [ 39.035287] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.035777] ksys_mmap_pgoff+0x3af/0x500 [ 39.036288] do_syscall_64+0x3f/0x90 [ 39.036790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.037452] [ 39.037672] The buggy address belongs to the object at ffff88800dbbe740 [ 39.037672] which belongs to the cache vm_area_struct of size 168 [ 39.039193] The buggy address is located 88 bytes inside of [ 39.039193] freed 168-byte region [ffff88800dbbe740, ffff88800dbbe7e8) [ 39.040630] [ 39.040847] The buggy address belongs to the physical page: [ 39.041509] page:0000000047cfd916 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbbe [ 39.042624] memcg:ffff88800dc94601 [ 39.043062] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.043798] page_type: 0xffffffff() [ 39.044258] raw: 0100000000000200 ffff8880087a0c80 ffffea0000261b40 dead000000000007 [ 39.045204] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc94601 [ 39.046143] page dumped because: kasan: bad access detected [ 39.046816] [ 39.047032] Memory state around the buggy address: [ 39.047639] ffff88800dbbe680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.048506] ffff88800dbbe700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.049411] >ffff88800dbbe780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.050329] ^ [ 39.050828] ffff88800dbbe800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.051689] ffff88800dbbe880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.052557] ================================================================== [ 39.053592] Disabling lock debugging due to kernel taint [ 41.971403] BUG: Bad rss-counter state mm:000000004195a732 type:MM_FILEPAGES val:33 [ 41.972888] BUG: Bad rss-counter state mm:000000004195a732 type:MM_ANONPAGES val:22 [ 42.477353] BUG: Bad rss-counter state mm:00000000a98cd9c4 type:MM_FILEPAGES val:33 [ 42.478349] BUG: Bad rss-counter state mm:00000000a98cd9c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22007' (ECDSA) to the list of known hosts. 2023/06/21 10:49:08 fuzzer started 2023/06/21 10:49:09 dialing manager at localhost:36067 2023/06/21 10:49:09 checking machine... 2023/06/21 10:49:09 checking revisions... [ 43.225547] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:49:09 testing simple program... [ 43.277642] cgroup: Unknown subsys name 'net' [ 43.326481] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:49:08 Registers: info registers vcpu 0 RAX=ffffffff8185af33 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110028a0f3c RSI=ffffffff8185af33 RDI=ffff888014507a50 RBP=ffff888014507a20 RSP=ffff888014507980 R8 =0000000000000001 R9 =ffff8880145079c8 R10=0000000000038001 R11=00000000000223eb R12=ffff888014507a50 R13=0000000000000000 R14=ffff888015913680 R15=0000000000000cc0 RIP=ffffffff84538440 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 00007f9cd7781900 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=00007f9cd6be4da8 CR3=000000000d5aa000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=732d683b62880d6a00000000000ae988 XMM05=7e2d40c0b77af9830000000000134ab8 XMM06=c291bd5c70af25b900000000001332f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000015b83067 RBX=1ffff11001df9fac RCX=0000000000000000 RDX=1ffff11003397e71 RSI=ffffffff8171824c RDI=0000000000000007 RBP=ffff888019cbf000 RSP=ffff88800efcfd40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888019cbf388 R13=ffffffff852c61f8 R14=ffff888009a82500 R15=0000000019cbf067 RIP=ffffffff8171826b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5e8e2e9900 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=00005607ce274bec CR3=000000000951a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000