syzkaller login: [ 30.989960] BUG: Bad rss-counter state mm:00000000539602c2 type:MM_FILEPAGES val:33 [ 30.991180] BUG: Bad rss-counter state mm:00000000539602c2 type:MM_ANONPAGES val:22 [ 31.027384] ================================================================== [ 31.028356] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.029395] Read of size 8 at addr ffff8880158a76b0 by task sshd/220 [ 31.030162] [ 31.030381] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.031284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.032283] Call Trace: [ 31.032639] [ 31.032919] dump_stack_lvl+0x91/0xf0 [ 31.033418] print_report+0xcc/0x620 [ 31.033904] ? __virt_addr_valid+0x102/0x340 [ 31.034466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035085] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035705] kasan_report+0xbe/0xf0 [ 31.036184] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.036817] vma_interval_tree_remove+0xc75/0xec0 [ 31.037428] vma_prepare+0xc54/0x11a0 [ 31.037901] __split_vma+0x5af/0x950 [ 31.038381] ? __pfx___split_vma+0x10/0x10 [ 31.038907] ? find_held_lock+0x2c/0x110 [ 31.039427] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.039993] ? lock_is_held_type+0x9f/0x120 [ 31.040552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.041161] ? mtree_range_walk+0x632/0x900 [ 31.041718] ? mas_walk+0x5c7/0x7c0 [ 31.042195] do_vmi_munmap+0x1f1/0x2b0 [ 31.042686] mmap_region+0x1f9/0x2660 [ 31.043171] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.043689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.044417] ? __pfx_lock_acquire+0x10/0x10 [ 31.044952] ? __pfx_mmap_region+0x10/0x10 [ 31.045484] ? security_mmap_addr+0x7d/0xa0 [ 31.046013] ? get_unmapped_area+0x1f5/0x3f0 [ 31.046559] do_mmap+0x854/0xf00 [ 31.047002] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.047494] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.048058] ksys_mmap_pgoff+0x3af/0x500 [ 31.048568] do_syscall_64+0x3f/0x90 [ 31.049050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.049695] RIP: 0033:0x7f3819562d82 [ 31.050157] 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 [ 31.052268] RSP: 002b:00007ffd66c579b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.053181] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3819562d82 [ 31.054028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f381899c000 [ 31.054878] RBP: 00007f381899c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.055727] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e109e0aec0 [ 31.056589] R13: 00007ffd66c579d0 R14: 00007ffd66c57a00 R15: 00007ffd66c57d60 [ 31.057440] [ 31.057728] [ 31.057942] Allocated by task 213: [ 31.058368] kasan_save_stack+0x22/0x50 [ 31.058868] kasan_set_track+0x25/0x30 [ 31.059366] __kasan_slab_alloc+0x59/0x70 [ 31.059891] kmem_cache_alloc+0x16b/0x370 [ 31.060424] vm_area_dup+0x20/0x160 [ 31.060880] __split_vma+0x170/0x950 [ 31.061341] split_vma+0xc6/0x110 [ 31.061784] mprotect_fixup+0x8d2/0xb30 [ 31.062305] do_mprotect_pkey+0x87e/0xd40 [ 31.062823] __x64_sys_mprotect+0x78/0xc0 [ 31.063352] do_syscall_64+0x3f/0x90 [ 31.063825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064473] [ 31.064690] Freed by task 213: [ 31.065082] kasan_save_stack+0x22/0x50 [ 31.065585] kasan_set_track+0x25/0x30 [ 31.066075] kasan_save_free_info+0x2b/0x50 [ 31.066612] __kasan_slab_free+0x10a/0x190 [ 31.067141] kmem_cache_free+0x10d/0x4d0 [ 31.067645] rcu_core+0x8c8/0x2860 [ 31.068091] __do_softirq+0x1b7/0x7d4 [ 31.068582] [ 31.068799] Last potentially related work creation: [ 31.069388] kasan_save_stack+0x22/0x50 [ 31.069903] __kasan_record_aux_stack+0x8e/0xa0 [ 31.070477] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.071125] remove_vma+0x139/0x170 [ 31.071574] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.072146] do_vmi_munmap+0x1f1/0x2b0 [ 31.072638] __vm_munmap+0x138/0x3a0 [ 31.073108] __x64_sys_munmap+0x59/0x80 [ 31.073607] do_syscall_64+0x3f/0x90 [ 31.074077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.074728] [ 31.074944] The buggy address belongs to the object at ffff8880158a7658 [ 31.074944] which belongs to the cache vm_area_struct of size 168 [ 31.076419] The buggy address is located 88 bytes inside of [ 31.076419] freed 168-byte region [ffff8880158a7658, ffff8880158a7700) [ 31.077824] [ 31.078043] The buggy address belongs to the physical page: [ 31.078703] page:0000000022ba1e2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158a7 [ 31.079790] memcg:ffff88800ee2d401 [ 31.080215] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.080869] page_type: 0xffffffff() [ 31.081318] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.082242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee2d401 [ 31.083147] page dumped because: kasan: bad access detected [ 31.083805] [ 31.084025] Memory state around the buggy address: [ 31.084625] ffff8880158a7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.085474] ffff8880158a7600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.086337] >ffff8880158a7680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.087205] ^ [ 31.087800] ffff8880158a7700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.088672] ffff8880158a7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.089537] ================================================================== [ 31.090572] Disabling lock debugging due to kernel taint [ 33.017769] BUG: Bad rss-counter state mm:0000000042c3fad3 type:MM_FILEPAGES val:33 [ 33.018799] BUG: Bad rss-counter state mm:0000000042c3fad3 type:MM_ANONPAGES val:22 [ 33.582835] BUG: Bad rss-counter state mm:000000001319e602 type:MM_FILEPAGES val:33 [ 33.584069] BUG: Bad rss-counter state mm:000000001319e602 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56532' (ECDSA) to the list of known hosts. 2023/06/21 06:17:18 fuzzer started 2023/06/21 06:17:18 dialing manager at localhost:36067 2023/06/21 06:17:18 checking machine... 2023/06/21 06:17:18 checking revisions... [ 34.256252] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:17:18 testing simple program... [ 34.310527] cgroup: Unknown subsys name 'net' [ 34.372523] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:17:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00005603829a9cf0 RCX=0000560381b17cde RDX=0000000000000012 RSI=0000000000000001 RDI=00007ffc121c13f0 RBP=00007ffc121c14e0 RSP=00007ffc121c1310 R8 =00000000000000e6 R9 =00007ffc121c1ad0 R10=a1728cf0569710ba R11=000000000000dac0 R12=00007ffc121c1570 R13=00007ffc121c1d50 R14=000000000000001f R15=00007ffc121c1ad0 RIP=00007f0f196b0ac7 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0f18dda900 00000000 00000000 GS =0000 0000000000000000 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=00005578243e7768 CR3=0000000013812000 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=ffffffffff0000000000000000000000 XMM01=0000560300656369767265732e687373 XMM02=0036333538352074726f7020322e322e XMM03=6f72662064657463656e6e6f63736944 XMM04=6cc0596880e2a66c00000000000ae988 XMM05=ac0cab197bab29710000000000132db8 XMM06=c291bd5c70af25b90000000000131e58 XMM07=00000000000000000000000000000000 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fcc7880 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800fcc7870 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e97 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 00007ff350570900 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=00007ff350b280b0 CR3=0000000009d82000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000