syzkaller login: [ 34.008687] BUG: Bad rss-counter state mm:00000000222ee304 type:MM_FILEPAGES val:33 [ 34.009706] BUG: Bad rss-counter state mm:00000000222ee304 type:MM_ANONPAGES val:22 [ 34.047568] ================================================================== [ 34.048692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.049803] Read of size 8 at addr ffff88801a47a6b0 by task sshd/220 [ 34.050903] [ 34.051179] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.052150] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.053343] Call Trace: [ 34.053699] [ 34.054094] dump_stack_lvl+0x91/0xf0 [ 34.054745] print_report+0xcc/0x620 [ 34.055376] ? __virt_addr_valid+0x102/0x340 [ 34.056038] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.056732] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.057412] kasan_report+0xbe/0xf0 [ 34.057946] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.058640] vma_interval_tree_remove+0xc75/0xec0 [ 34.059325] vma_prepare+0xc54/0x11a0 [ 34.059853] __split_vma+0x5af/0x950 [ 34.060376] ? __pfx___split_vma+0x10/0x10 [ 34.060962] ? find_held_lock+0x2c/0x110 [ 34.061534] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.062158] ? lock_is_held_type+0x9f/0x120 [ 34.062770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.063438] ? mtree_range_walk+0x632/0x900 [ 34.064042] ? mas_walk+0x5c7/0x7c0 [ 34.064571] do_vmi_munmap+0x1f1/0x2b0 [ 34.065109] mmap_region+0x1f9/0x2660 [ 34.065646] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.066218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.067009] ? __pfx_lock_acquire+0x10/0x10 [ 34.067599] ? __pfx_mmap_region+0x10/0x10 [ 34.068188] ? security_mmap_addr+0x7d/0xa0 [ 34.068770] ? get_unmapped_area+0x1f5/0x3f0 [ 34.069370] do_mmap+0x854/0xf00 [ 34.069857] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.070398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.071036] ksys_mmap_pgoff+0x3af/0x500 [ 34.071595] do_syscall_64+0x3f/0x90 [ 34.072108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.072820] RIP: 0033:0x7fcc936bed82 [ 34.073324] 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 [ 34.075706] RSP: 002b:00007ffeec94ecd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.076702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc936bed82 [ 34.077639] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc92af8000 [ 34.078578] RBP: 00007fcc92af8000 R08: 0000000000000009 R09: 0000000000001000 [ 34.079542] R10: 0000000000000812 R11: 0000000000000206 R12: 000055999a202b20 [ 34.080478] R13: 00007ffeec94ecf0 R14: 00007ffeec94ed20 R15: 00007ffeec94f080 [ 34.081432] [ 34.081756] [ 34.081996] Allocated by task 212: [ 34.082475] kasan_save_stack+0x22/0x50 [ 34.083047] kasan_set_track+0x25/0x30 [ 34.083595] __kasan_slab_alloc+0x59/0x70 [ 34.084176] kmem_cache_alloc+0x16b/0x370 [ 34.084748] vm_area_dup+0x20/0x160 [ 34.085251] __split_vma+0x170/0x950 [ 34.085766] split_vma+0xc6/0x110 [ 34.086248] mprotect_fixup+0x8d2/0xb30 [ 34.086826] do_mprotect_pkey+0x87e/0xd40 [ 34.087406] __x64_sys_mprotect+0x78/0xc0 [ 34.087985] do_syscall_64+0x3f/0x90 [ 34.088510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.089300] [ 34.089538] Freed by task 212: [ 34.089971] kasan_save_stack+0x22/0x50 [ 34.090527] kasan_set_track+0x25/0x30 [ 34.091094] kasan_save_free_info+0x2b/0x50 [ 34.091685] __kasan_slab_free+0x10a/0x190 [ 34.092277] kmem_cache_free+0x10d/0x4d0 [ 34.092843] rcu_core+0x8c8/0x2860 [ 34.093340] __do_softirq+0x1b7/0x7d4 [ 34.093865] [ 34.094105] Last potentially related work creation: [ 34.094774] kasan_save_stack+0x22/0x50 [ 34.095337] __kasan_record_aux_stack+0x8e/0xa0 [ 34.095969] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.096681] remove_vma+0x139/0x170 [ 34.097180] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.097799] do_vmi_munmap+0x1f1/0x2b0 [ 34.098340] __vm_munmap+0x138/0x3a0 [ 34.098864] __x64_sys_munmap+0x59/0x80 [ 34.099411] do_syscall_64+0x3f/0x90 [ 34.099941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.100658] [ 34.100894] The buggy address belongs to the object at ffff88801a47a658 [ 34.100894] which belongs to the cache vm_area_struct of size 168 [ 34.102526] The buggy address is located 88 bytes inside of [ 34.102526] freed 168-byte region [ffff88801a47a658, ffff88801a47a700) [ 34.104084] [ 34.104321] The buggy address belongs to the physical page: [ 34.105049] page:00000000ccedfba3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a47a [ 34.106257] memcg:ffff88801a44a901 [ 34.106744] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.107519] page_type: 0xffffffff() [ 34.108015] raw: 0100000000000200 ffff88800879fc80 ffffea0000691880 dead000000000003 [ 34.109028] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a44a901 [ 34.110032] page dumped because: kasan: bad access detected [ 34.110782] [ 34.111018] Memory state around the buggy address: [ 34.111663] ffff88801a47a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.112612] ffff88801a47a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.113570] >ffff88801a47a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.114522] ^ [ 34.115176] ffff88801a47a700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 34.116136] ffff88801a47a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.117086] ================================================================== [ 34.118229] Disabling lock debugging due to kernel taint [ 36.425211] BUG: Bad rss-counter state mm:00000000bab672f5 type:MM_FILEPAGES val:33 [ 36.426511] BUG: Bad rss-counter state mm:00000000bab672f5 type:MM_ANONPAGES val:22 [ 36.804317] BUG: Bad rss-counter state mm:00000000ff5a8f59 type:MM_FILEPAGES val:33 [ 36.805418] BUG: Bad rss-counter state mm:00000000ff5a8f59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57404' (ECDSA) to the list of known hosts. 2023/06/19 11:40:47 fuzzer started 2023/06/19 11:40:47 dialing manager at localhost:44161 2023/06/19 11:40:47 checking machine... 2023/06/19 11:40:47 checking revisions... [ 37.492459] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:40:47 testing simple program... [ 37.545956] cgroup: Unknown subsys name 'net' [ 37.582774] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:40:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b88 RCX=ffffffff860d68f6 RDX=1ffff1100d9c134b RSI=0000000000000000 RDI=ffff88806ce09a58 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff860d68fa R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09b88 R15=ffff88806ce09a50 RIP=ffffffff81131c83 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 00007f28c157d900 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=00007f28c1b34618 CR3=000000000e47e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=ffff888008c58400 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=00007f4334532740 CR3=000000000f73a000 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=b56b7b497704d5bf10420dbbd50ea7c1 XMM02=2c67c8bc2e329bc3000000000011d240 XMM03=fb795ef6d65770560000000000123f58 XMM04=1f657f0288c782ae00000000000ae988 XMM05=3c656500fc195e3600000000001347b8 XMM06=4fda316b135da52b00000000001341b0 XMM07=e042d86d42eb936e0000000000124230 XMM08=0a43cab861da995f000000000011d2a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000