syzkaller login: [ 62.979599] BUG: Bad rss-counter state mm:00000000e80d90d9 type:MM_FILEPAGES val:33 [ 62.981123] BUG: Bad rss-counter state mm:00000000e80d90d9 type:MM_ANONPAGES val:22 [ 63.023047] ================================================================== [ 63.024047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.025108] Read of size 8 at addr ffff8880168d1ed8 by task sshd/221 [ 63.025957] [ 63.026206] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.027068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.028072] Call Trace: [ 63.028397] [ 63.028683] dump_stack_lvl+0x91/0xf0 [ 63.029176] print_report+0xcc/0x620 [ 63.029662] ? __virt_addr_valid+0x102/0x340 [ 63.030214] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.030833] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.031450] kasan_report+0xbe/0xf0 [ 63.031928] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.032561] vma_interval_tree_remove+0xc75/0xec0 [ 63.033165] vma_prepare+0xc54/0x11a0 [ 63.033642] __split_vma+0x5af/0x950 [ 63.034118] ? __pfx___split_vma+0x10/0x10 [ 63.034664] ? find_held_lock+0x2c/0x110 [ 63.035295] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.035988] ? lock_is_held_type+0x9f/0x120 [ 63.036642] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.037383] ? mtree_range_walk+0x632/0x900 [ 63.038048] ? mas_walk+0x5c7/0x7c0 [ 63.038628] do_vmi_munmap+0x1f1/0x2b0 [ 63.039227] mmap_region+0x1f9/0x2660 [ 63.039816] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.040465] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.041328] ? __pfx_lock_acquire+0x10/0x10 [ 63.041982] ? __pfx_mmap_region+0x10/0x10 [ 63.042626] ? security_mmap_addr+0x7d/0xa0 [ 63.043269] ? get_unmapped_area+0x1f5/0x3f0 [ 63.043950] do_mmap+0x854/0xf00 [ 63.044480] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.045082] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.045764] ksys_mmap_pgoff+0x3af/0x500 [ 63.046383] do_syscall_64+0x3f/0x90 [ 63.046968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.047747] RIP: 0033:0x7fccf894bd82 [ 63.048323] 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 [ 63.050926] RSP: 002b:00007ffff992fe88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.052045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fccf894bd82 [ 63.053066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fccf7d85000 [ 63.054097] RBP: 00007fccf7d85000 R08: 0000000000000009 R09: 0000000000001000 [ 63.055128] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c543e4980 [ 63.056188] R13: 00007ffff992fea0 R14: 00007ffff992fed0 R15: 00007ffff9930230 [ 63.057233] [ 63.057592] [ 63.057857] Allocated by task 214: [ 63.058383] kasan_save_stack+0x22/0x50 [ 63.058996] kasan_set_track+0x25/0x30 [ 63.059606] __kasan_slab_alloc+0x59/0x70 [ 63.060257] kmem_cache_alloc+0x16b/0x370 [ 63.060883] vm_area_dup+0x20/0x160 [ 63.061440] __split_vma+0x170/0x950 [ 63.062014] split_vma+0xc6/0x110 [ 63.062554] mprotect_fixup+0x8d2/0xb30 [ 63.063178] do_mprotect_pkey+0x87e/0xd40 [ 63.063819] __x64_sys_mprotect+0x78/0xc0 [ 63.064479] do_syscall_64+0x3f/0x90 [ 63.065052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.065834] [ 63.066093] Freed by task 214: [ 63.066566] kasan_save_stack+0x22/0x50 [ 63.067184] kasan_set_track+0x25/0x30 [ 63.067810] kasan_save_free_info+0x2b/0x50 [ 63.068484] __kasan_slab_free+0x10a/0x190 [ 63.069128] kmem_cache_free+0x10d/0x4d0 [ 63.069749] rcu_core+0x8c8/0x2860 [ 63.070303] __do_softirq+0x1b7/0x7d4 [ 63.070855] [ 63.071070] Last potentially related work creation: [ 63.071656] kasan_save_stack+0x22/0x50 [ 63.072169] __kasan_record_aux_stack+0x8e/0xa0 [ 63.072766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.073411] remove_vma+0x139/0x170 [ 63.073872] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.074443] do_vmi_munmap+0x1f1/0x2b0 [ 63.074932] __vm_munmap+0x138/0x3a0 [ 63.075408] __x64_sys_munmap+0x59/0x80 [ 63.075918] do_syscall_64+0x3f/0x90 [ 63.076397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.077044] [ 63.077261] The buggy address belongs to the object at ffff8880168d1e80 [ 63.077261] which belongs to the cache vm_area_struct of size 168 [ 63.078737] The buggy address is located 88 bytes inside of [ 63.078737] freed 168-byte region [ffff8880168d1e80, ffff8880168d1f28) [ 63.080167] [ 63.080382] The buggy address belongs to the physical page: [ 63.081127] page:00000000019d227f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168d1 [ 63.082466] memcg:ffff88800f639d01 [ 63.082989] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.083774] page_type: 0xffffffff() [ 63.084336] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.085457] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f639d01 [ 63.086568] page dumped because: kasan: bad access detected [ 63.087382] [ 63.087643] Memory state around the buggy address: [ 63.088355] ffff8880168d1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.089389] ffff8880168d1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 63.090425] >ffff8880168d1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.091444] ^ [ 63.092343] ffff8880168d1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 63.093379] ffff8880168d1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 63.094397] ================================================================== [ 63.095659] Disabling lock debugging due to kernel taint [ 65.859263] BUG: Bad rss-counter state mm:000000005efb42d2 type:MM_FILEPAGES val:33 [ 65.860971] BUG: Bad rss-counter state mm:000000005efb42d2 type:MM_ANONPAGES val:22 [ 66.415774] BUG: Bad rss-counter state mm:000000009a585cd2 type:MM_FILEPAGES val:33 [ 66.417014] BUG: Bad rss-counter state mm:000000009a585cd2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53083' (ECDSA) to the list of known hosts. 2023/06/19 13:36:14 fuzzer started 2023/06/19 13:36:14 dialing manager at localhost:44161 2023/06/19 13:36:14 checking machine... 2023/06/19 13:36:14 checking revisions... [ 67.055170] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:36:15 testing simple program... [ 67.098506] cgroup: Unknown subsys name 'net' [ 67.140127] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:36:12 Registers: info registers vcpu 0 RAX=ffffffff81390b1d RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015ce7f01 RSI=ffff888015ce7f08 RDI=ffff888015ce7f08 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860ab106 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000009789 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888015ce7f10 R15=ffff88806ce09a98 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f2df8afb900 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=00007f2df90b2618 CR3=000000000da92000 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=563412feff00545000000000000080fe 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=00007f99053053c0 CR3=000000000dbac000 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=9fe7a0eb325cfc927049befc86f4eb28 XMM02=000000000011c7a8eff9b2d0a8fce9cb XMM03=000000000011c8782c67c8bc2e329bc3 XMM04=161f5a58c3017c3600000000000ae988 XMM05=e4cb8bb95a7664b60000000000133d68 XMM06=c291bd5c70af25b90000000000133bf0 XMM07=e042d86d42eb936e00000000001243e0 XMM08=9ef17c826273571b000000000011c878 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000