syzkaller login: [ 34.898802] BUG: Bad rss-counter state mm:00000000361ad02c type:MM_FILEPAGES val:33 [ 34.899805] BUG: Bad rss-counter state mm:00000000361ad02c type:MM_ANONPAGES val:22 [ 34.938027] ================================================================== [ 34.939086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.940144] Read of size 8 at addr ffff888019fdf3f8 by task sshd/220 [ 34.941017] [ 34.941375] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.942226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.943339] Call Trace: [ 34.943663] [ 34.943954] dump_stack_lvl+0x91/0xf0 [ 34.944446] print_report+0xcc/0x620 [ 34.945025] ? __virt_addr_valid+0x102/0x340 [ 34.945665] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.946450] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.947075] kasan_report+0xbe/0xf0 [ 34.947642] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.948343] vma_interval_tree_remove+0xc75/0xec0 [ 34.949031] vma_prepare+0xc54/0x11a0 [ 34.949673] __split_vma+0x5af/0x950 [ 34.950146] ? __pfx___split_vma+0x10/0x10 [ 34.950673] ? find_held_lock+0x2c/0x110 [ 34.951200] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.951769] ? lock_is_held_type+0x9f/0x120 [ 34.952308] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.952944] ? mtree_range_walk+0x632/0x900 [ 34.953493] ? mas_walk+0x5c7/0x7c0 [ 34.953963] do_vmi_munmap+0x1f1/0x2b0 [ 34.954453] mmap_region+0x1f9/0x2660 [ 34.954939] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.955448] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.956157] ? __pfx_lock_acquire+0x10/0x10 [ 34.956686] ? __pfx_mmap_region+0x10/0x10 [ 34.957234] ? security_mmap_addr+0x7d/0xa0 [ 34.957770] ? get_unmapped_area+0x1f5/0x3f0 [ 34.958321] do_mmap+0x854/0xf00 [ 34.958756] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.959248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.959809] ksys_mmap_pgoff+0x3af/0x500 [ 34.960314] do_syscall_64+0x3f/0x90 [ 34.960808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.961449] RIP: 0033:0x7ff0f6641d82 [ 34.961905] 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 [ 34.964025] RSP: 002b:00007ffe53338d58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.964939] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0f6641d82 [ 34.965789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0f5a7b000 [ 34.966630] RBP: 00007ff0f5a7b000 R08: 0000000000000009 R09: 0000000000001000 [ 34.967472] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563569a8fec0 [ 34.968323] R13: 00007ffe53338d70 R14: 00007ffe53338da0 R15: 00007ffe53339100 [ 34.969189] [ 34.969483] [ 34.969702] Allocated by task 213: [ 34.970130] kasan_save_stack+0x22/0x50 [ 34.970637] kasan_set_track+0x25/0x30 [ 34.971131] __kasan_slab_alloc+0x59/0x70 [ 34.971652] kmem_cache_alloc+0x16b/0x370 [ 34.972174] vm_area_dup+0x20/0x160 [ 34.972630] __split_vma+0x170/0x950 [ 34.973108] split_vma+0xc6/0x110 [ 34.973544] mprotect_fixup+0x8d2/0xb30 [ 34.974042] do_mprotect_pkey+0x87e/0xd40 [ 34.974565] __x64_sys_mprotect+0x78/0xc0 [ 34.975091] do_syscall_64+0x3f/0x90 [ 34.975562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.976200] [ 34.976414] Freed by task 213: [ 34.976835] kasan_save_stack+0x22/0x50 [ 34.977342] kasan_set_track+0x25/0x30 [ 34.977833] kasan_save_free_info+0x2b/0x50 [ 34.978360] __kasan_slab_free+0x10a/0x190 [ 34.978894] kmem_cache_free+0x10d/0x4d0 [ 34.979400] rcu_core+0x8c8/0x2860 [ 34.979845] __do_softirq+0x1b7/0x7d4 [ 34.980316] [ 34.980532] Last potentially related work creation: [ 34.981125] kasan_save_stack+0x22/0x50 [ 34.981625] __kasan_record_aux_stack+0x8e/0xa0 [ 34.982200] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.982847] remove_vma+0x139/0x170 [ 34.983380] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.983934] do_vmi_munmap+0x1f1/0x2b0 [ 34.984421] __vm_munmap+0x138/0x3a0 [ 34.984906] __x64_sys_munmap+0x59/0x80 [ 34.985410] do_syscall_64+0x3f/0x90 [ 34.985887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.986523] [ 34.986737] The buggy address belongs to the object at ffff888019fdf3a0 [ 34.986737] which belongs to the cache vm_area_struct of size 168 [ 34.988198] The buggy address is located 88 bytes inside of [ 34.988198] freed 168-byte region [ffff888019fdf3a0, ffff888019fdf448) [ 34.989605] [ 34.989820] The buggy address belongs to the physical page: [ 34.990473] page:0000000059708f03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fdf [ 34.991555] memcg:ffff88801675a601 [ 34.991983] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.992624] page_type: 0xffffffff() [ 34.993077] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.993992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801675a601 [ 34.994907] page dumped because: kasan: bad access detected [ 34.995564] [ 34.995781] Memory state around the buggy address: [ 34.996357] ffff888019fdf280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.997226] ffff888019fdf300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.998073] >ffff888019fdf380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.998921] ^ [ 34.999772] ffff888019fdf400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.000624] ffff888019fdf480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.001479] ================================================================== [ 35.002485] Disabling lock debugging due to kernel taint [ 36.849717] BUG: Bad rss-counter state mm:00000000e19e5cc4 type:MM_FILEPAGES val:33 [ 36.850958] BUG: Bad rss-counter state mm:00000000e19e5cc4 type:MM_ANONPAGES val:22 [ 37.243354] BUG: Bad rss-counter state mm:00000000f3712673 type:MM_FILEPAGES val:33 [ 37.244793] BUG: Bad rss-counter state mm:00000000f3712673 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59940' (ECDSA) to the list of known hosts. 2023/06/19 22:18:49 fuzzer started 2023/06/19 22:18:49 dialing manager at localhost:44161 2023/06/19 22:18:50 checking machine... 2023/06/19 22:18:50 checking revisions... [ 37.972600] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:18:50 testing simple program... [ 38.018886] cgroup: Unknown subsys name 'net' [ 38.067772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:18:44 Registers: info registers vcpu 0 RAX=ffffffff8180f43b RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9c135e RSI=ffffffff8180f43b RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888018088080 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 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=00007fbfdfc5f610 CR3=0000000019e6e000 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=2039343a38313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a38313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff88800ef1b680 RSI=ffffffff8113b190 RDI=0000000000000007 RBP=ffff88800ef20000 RSP=ffff88801cccfe90 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000002 R13=0000000000100073 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0800 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 00007fd3a3599900 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=00007fd3a39353ec CR3=000000000ea94000 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