Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.279885] BUG: Bad rss-counter state mm:000000000e9477cf type:MM_FILEPAGES val:33 [ 34.281978] BUG: Bad rss-counter state mm:000000000e9477cf type:MM_ANONPAGES val:22 [ 34.450190] ================================================================== [ 34.451323] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.452433] Read of size 8 at addr ffff888014605c20 by task sshd/221 [ 34.453461] [ 34.453722] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.454810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.455910] Call Trace: [ 34.456249] [ 34.456555] dump_stack_lvl+0x91/0xf0 [ 34.457080] print_report+0xcc/0x620 [ 34.457591] ? __virt_addr_valid+0x102/0x340 [ 34.458193] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.458887] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.459549] kasan_report+0xbe/0xf0 [ 34.460059] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.460727] vma_interval_tree_remove+0xc75/0xec0 [ 34.461383] vma_prepare+0xc54/0x11a0 [ 34.461896] __split_vma+0x5af/0x950 [ 34.462440] ? __pfx___split_vma+0x10/0x10 [ 34.463018] ? find_held_lock+0x2c/0x110 [ 34.463581] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.464184] ? lock_is_held_type+0x9f/0x120 [ 34.464768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.465426] ? mtree_range_walk+0x632/0x900 [ 34.466030] ? mas_walk+0x5c7/0x7c0 [ 34.466578] do_vmi_munmap+0x1f1/0x2b0 [ 34.467116] mmap_region+0x1f9/0x2660 [ 34.467635] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.468184] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.468957] ? __pfx_lock_acquire+0x10/0x10 [ 34.469529] ? __pfx_mmap_region+0x10/0x10 [ 34.470122] ? security_mmap_addr+0x7d/0xa0 [ 34.470732] ? get_unmapped_area+0x1f5/0x3f0 [ 34.471321] do_mmap+0x854/0xf00 [ 34.471794] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.472326] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.472920] ksys_mmap_pgoff+0x3af/0x500 [ 34.473458] do_syscall_64+0x3f/0x90 [ 34.473976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.474709] RIP: 0033:0x7fd876765d82 [ 34.475195] 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 [ 34.477465] RSP: 002b:00007ffd40581168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.478470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd876765d82 [ 34.479386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd875b9f000 [ 34.480293] RBP: 00007fd875b9f000 R08: 0000000000000009 R09: 0000000000001000 [ 34.481202] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa7a34ff70 [ 34.482110] R13: 00007ffd40581180 R14: 00007ffd405811b0 R15: 00007ffd40581510 [ 34.483060] [ 34.483373] [ 34.483602] Allocated by task 214: [ 34.484056] kasan_save_stack+0x22/0x50 [ 34.484596] kasan_set_track+0x25/0x30 [ 34.485123] __kasan_slab_alloc+0x59/0x70 [ 34.485683] kmem_cache_alloc+0x16b/0x370 [ 34.486240] vm_area_dup+0x20/0x160 [ 34.486769] __split_vma+0x170/0x950 [ 34.487267] split_vma+0xc6/0x110 [ 34.487747] mprotect_fixup+0x8d2/0xb30 [ 34.488289] do_mprotect_pkey+0x87e/0xd40 [ 34.488852] __x64_sys_mprotect+0x78/0xc0 [ 34.489414] do_syscall_64+0x3f/0x90 [ 34.489925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.490649] [ 34.490880] Freed by task 214: [ 34.491300] kasan_save_stack+0x22/0x50 [ 34.491853] kasan_set_track+0x25/0x30 [ 34.492389] kasan_save_free_info+0x2b/0x50 [ 34.492967] __kasan_slab_free+0x10a/0x190 [ 34.493548] kmem_cache_free+0x10d/0x4d0 [ 34.494096] rcu_core+0x8c8/0x2860 [ 34.494650] __do_softirq+0x1b7/0x7d4 [ 34.495163] [ 34.495393] Last potentially related work creation: [ 34.496032] kasan_save_stack+0x22/0x50 [ 34.496582] __kasan_record_aux_stack+0x8e/0xa0 [ 34.497193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.497885] remove_vma+0x139/0x170 [ 34.498424] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.499015] do_vmi_munmap+0x1f1/0x2b0 [ 34.499536] __vm_munmap+0x138/0x3a0 [ 34.500031] __x64_sys_munmap+0x59/0x80 [ 34.500561] do_syscall_64+0x3f/0x90 [ 34.501068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.501746] [ 34.501975] The buggy address belongs to the object at ffff888014605bc8 [ 34.501975] which belongs to the cache vm_area_struct of size 168 [ 34.503584] The buggy address is located 88 bytes inside of [ 34.503584] freed 168-byte region [ffff888014605bc8, ffff888014605c70) [ 34.505083] [ 34.505314] The buggy address belongs to the physical page: [ 34.506014] page:00000000db02daed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14605 [ 34.507207] memcg:ffff888016cce001 [ 34.507668] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.508358] page_type: 0xffffffff() [ 34.508846] raw: 0100000000000200 ffff88800879fc80 ffffea000032c180 dead000000000004 [ 34.509833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016cce001 [ 34.510846] page dumped because: kasan: bad access detected [ 34.511556] [ 34.511787] Memory state around the buggy address: [ 34.512404] ffff888014605b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.513347] ffff888014605b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.514271] >ffff888014605c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.515251] ^ [ 34.515829] ffff888014605c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.516771] ffff888014605d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.517676] ================================================================== [ 34.518771] Disabling lock debugging due to kernel taint [ 36.445023] BUG: Bad rss-counter state mm:00000000dcdee5fa type:MM_FILEPAGES val:33 [ 36.446318] BUG: Bad rss-counter state mm:00000000dcdee5fa type:MM_ANONPAGES val:22 [ 36.943827] BUG: Bad rss-counter state mm:00000000a1d22ad7 type:MM_FILEPAGES val:33 [ 36.945039] BUG: Bad rss-counter state mm:00000000a1d22ad7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41015' (ECDSA) to the list of known hosts. 2023/06/20 07:56:58 fuzzer started 2023/06/20 07:56:59 dialing manager at localhost:44161 2023/06/20 07:56:59 checking machine... 2023/06/20 07:56:59 checking revisions... [ 37.664457] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:56:59 testing simple program... [ 37.717118] cgroup: Unknown subsys name 'net' [ 37.769280] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:55 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=000055b915f51740 RCX=0000000000000000 RDX=000055b915f51770 RSI=0000000000000002 RDI=0000000000000001 RBP=0000000000000660 RSP=00007ffd13d1a248 R8 =000055b915f4ba10 R9 =000055b915f51770 R10=00007ffd13d19f77 R11=0000000000000000 R12=000055b915f3b350 R13=00007f1e63dc3000 R14=0000000000000000 R15=0000000000000000 RIP=00007f1e642990f0 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 00007f1e63e1b900 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=00007feda7d5a3e0 CR3=0000000014778000 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=ffff000000000000ffff000000000000 XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=7465675f6c697475646f6d6d61705f00 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=00007f1e643d30b0 CR3=000000001738c000 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=2038353a36353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a36353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000