[ 25.422839] BUG: Bad rss-counter state mm:000000001bcb3416 type:MM_FILEPAGES val:33 [ 25.424528] BUG: Bad rss-counter state mm:000000001bcb3416 type:MM_ANONPAGES val:22 [ 25.593730] ================================================================== [ 25.594677] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.595647] Read of size 8 at addr ffff88800cc96968 by task sshd/218 [ 25.596643] [ 25.596871] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.597783] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.598811] Call Trace: [ 25.599165] [ 25.599454] dump_stack_lvl+0x91/0xf0 [ 25.600003] print_report+0xcc/0x620 [ 25.600538] ? __virt_addr_valid+0x102/0x340 [ 25.601135] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.601764] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.602415] kasan_report+0xbe/0xf0 [ 25.602905] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.603566] vma_interval_tree_remove+0xc75/0xec0 [ 25.604251] vma_prepare+0xc54/0x11a0 [ 25.604771] __split_vma+0x5af/0x950 [ 25.605293] ? __pfx___split_vma+0x10/0x10 [ 25.605831] ? find_held_lock+0x2c/0x110 [ 25.606373] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.606985] ? lock_is_held_type+0x9f/0x120 [ 25.607533] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.608208] ? mtree_range_walk+0x632/0x900 [ 25.608813] ? mas_walk+0x5c7/0x7c0 [ 25.609327] do_vmi_munmap+0x1f1/0x2b0 [ 25.609861] mmap_region+0x1f9/0x2660 [ 25.610357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.610898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.611642] ? __pfx_lock_acquire+0x10/0x10 [ 25.612211] ? __pfx_mmap_region+0x10/0x10 [ 25.612818] ? security_mmap_addr+0x7d/0xa0 [ 25.613360] ? get_unmapped_area+0x1f5/0x3f0 [ 25.613919] do_mmap+0x854/0xf00 [ 25.614360] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.614889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.615455] ksys_mmap_pgoff+0x3af/0x500 [ 25.616032] do_syscall_64+0x3f/0x90 [ 25.616552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.617238] RIP: 0033:0x7fc5b4094d82 [ 25.617774] 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 [ 25.620047] RSP: 002b:00007ffea75b38c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.621038] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5b4094d82 [ 25.621986] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5b34ce000 [ 25.622963] RBP: 00007fc5b34ce000 R08: 0000000000000009 R09: 0000000000001000 [ 25.623903] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564776a58ec0 [ 25.624830] R13: 00007ffea75b38e0 R14: 00007ffea75b3910 R15: 00007ffea75b3c70 [ 25.625765] [ 25.626072] [ 25.626297] Allocated by task 211: [ 25.626781] kasan_save_stack+0x22/0x50 [ 25.627306] kasan_set_track+0x25/0x30 [ 25.627856] __kasan_slab_alloc+0x59/0x70 [ 25.628402] kmem_cache_alloc+0x16b/0x370 [ 25.628935] vm_area_dup+0x20/0x160 [ 25.629411] __split_vma+0x170/0x950 [ 25.629908] split_vma+0xc6/0x110 [ 25.630373] mprotect_fixup+0x8d2/0xb30 [ 25.630942] do_mprotect_pkey+0x87e/0xd40 [ 25.631558] __x64_sys_mprotect+0x78/0xc0 [ 25.632167] do_syscall_64+0x3f/0x90 [ 25.632694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.633408] [ 25.633635] Freed by task 202: [ 25.634075] kasan_save_stack+0x22/0x50 [ 25.634618] kasan_set_track+0x25/0x30 [ 25.635140] kasan_save_free_info+0x2b/0x50 [ 25.635697] __kasan_slab_free+0x10a/0x190 [ 25.636277] kmem_cache_free+0x10d/0x4d0 [ 25.636824] rcu_core+0x8c8/0x2860 [ 25.637286] __do_softirq+0x1b7/0x7d4 [ 25.637786] [ 25.638010] Last potentially related work creation: [ 25.638623] kasan_save_stack+0x22/0x50 [ 25.639155] __kasan_record_aux_stack+0x8e/0xa0 [ 25.639809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.640525] remove_vma+0x139/0x170 [ 25.641026] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.641601] do_vmi_munmap+0x1f1/0x2b0 [ 25.642099] __vm_munmap+0x138/0x3a0 [ 25.642579] __x64_sys_munmap+0x59/0x80 [ 25.643095] do_syscall_64+0x3f/0x90 [ 25.643586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.644268] [ 25.644528] Second to last potentially related work creation: [ 25.645229] kasan_save_stack+0x22/0x50 [ 25.645745] __kasan_record_aux_stack+0x8e/0xa0 [ 25.646345] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.647012] remove_vma+0x139/0x170 [ 25.647472] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.648060] do_vmi_munmap+0x1f1/0x2b0 [ 25.648616] mmap_region+0x1f9/0x2660 [ 25.649125] do_mmap+0x854/0xf00 [ 25.649576] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.650088] ksys_mmap_pgoff+0x3af/0x500 [ 25.650614] do_syscall_64+0x3f/0x90 [ 25.651113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.651782] [ 25.652039] The buggy address belongs to the object at ffff88800cc96910 [ 25.652039] which belongs to the cache vm_area_struct of size 168 [ 25.653624] The buggy address is located 88 bytes inside of [ 25.653624] freed 168-byte region [ffff88800cc96910, ffff88800cc969b8) [ 25.655120] [ 25.655346] The buggy address belongs to the physical page: [ 25.656061] page:00000000174129a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc96 [ 25.657244] memcg:ffff88800f443201 [ 25.657696] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.658436] page_type: 0xffffffff() [ 25.658910] raw: 0100000000000200 ffff88800879fc80 ffffea0000331440 dead000000000007 [ 25.659899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f443201 [ 25.660894] page dumped because: kasan: bad access detected [ 25.661592] [ 25.661820] Memory state around the buggy address: [ 25.662439] ffff88800cc96800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 25.663344] ffff88800cc96880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 25.664280] >ffff88800cc96900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.665219] ^ [ 25.666051] ffff88800cc96980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 25.666953] ffff88800cc96a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.667865] ================================================================== [ 25.669062] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.562814] BUG: Bad rss-counter state mm:00000000f12b34b6 type:MM_FILEPAGES val:33 [ 27.563738] BUG: Bad rss-counter state mm:00000000f12b34b6 type:MM_ANONPAGES val:22 [ 28.054076] BUG: Bad rss-counter state mm:000000000f6630e4 type:MM_FILEPAGES val:33 [ 28.055121] BUG: Bad rss-counter state mm:000000000f6630e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20753' (ECDSA) to the list of known hosts. 2023/06/19 20:00:28 fuzzer started 2023/06/19 20:00:28 dialing manager at localhost:44161 2023/06/19 20:00:28 checking machine... 2023/06/19 20:00:28 checking revisions... [ 28.790629] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:00:28 testing simple program... [ 28.834526] cgroup: Unknown subsys name 'net' [ 28.882661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:00:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffed1001dedead RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800ef6f558 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000091700000917 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ffa 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe32c017900 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=00007ffd1107f000 CR3=000000000e8fa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=00007f61d231f020 CR3=0000000016502000 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=2038323a30303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a30303a3032203931 XMM08=00007fcbbc005c800000006400000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000