Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.582986] BUG: Bad rss-counter state mm:00000000e11a3d8b type:MM_FILEPAGES val:33 [ 31.584455] BUG: Bad rss-counter state mm:00000000e11a3d8b type:MM_ANONPAGES val:22 [ 31.624606] ================================================================== [ 31.625574] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.626501] Read of size 8 at addr ffff88800deceb38 by task sshd/220 [ 31.627350] [ 31.627565] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.628441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.629437] Call Trace: [ 31.629753] <TASK> [ 31.630036] dump_stack_lvl+0x91/0xf0 [ 31.630526] print_report+0xcc/0x620 [ 31.631013] ? __virt_addr_valid+0x102/0x340 [ 31.631561] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.632185] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.632801] kasan_report+0xbe/0xf0 [ 31.633280] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.633902] vma_interval_tree_remove+0xc75/0xec0 [ 31.634504] vma_prepare+0xc54/0x11a0 [ 31.634984] __split_vma+0x5af/0x950 [ 31.635452] ? __pfx___split_vma+0x10/0x10 [ 31.635985] ? find_held_lock+0x2c/0x110 [ 31.636512] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.637082] ? lock_is_held_type+0x9f/0x120 [ 31.637620] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.638238] ? mtree_range_walk+0x632/0x900 [ 31.638802] ? mas_walk+0x5c7/0x7c0 [ 31.639303] do_vmi_munmap+0x1f1/0x2b0 [ 31.639796] mmap_region+0x1f9/0x2660 [ 31.640310] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.640821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.641535] ? __pfx_lock_acquire+0x10/0x10 [ 31.642060] ? __pfx_mmap_region+0x10/0x10 [ 31.642595] ? security_mmap_addr+0x7d/0xa0 [ 31.643120] ? get_unmapped_area+0x1f5/0x3f0 [ 31.643671] do_mmap+0x854/0xf00 [ 31.644128] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.644629] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.645189] ksys_mmap_pgoff+0x3af/0x500 [ 31.645691] do_syscall_64+0x3f/0x90 [ 31.646166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.646808] RIP: 0033:0x7f0c7a923d82 [ 31.647261] 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 [ 31.649423] RSP: 002b:00007ffd438f94e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.650323] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c7a923d82 [ 31.651177] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c79d5d000 [ 31.652011] RBP: 00007f0c79d5d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.652875] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd0e172ec0 [ 31.653710] R13: 00007ffd438f9500 R14: 00007ffd438f9530 R15: 00007ffd438f9890 [ 31.654558] </TASK> [ 31.654851] [ 31.655064] Allocated by task 213: [ 31.655486] kasan_save_stack+0x22/0x50 [ 31.655989] kasan_set_track+0x25/0x30 [ 31.656502] __kasan_slab_alloc+0x59/0x70 [ 31.657036] kmem_cache_alloc+0x16b/0x370 [ 31.657548] vm_area_dup+0x20/0x160 [ 31.658006] __split_vma+0x170/0x950 [ 31.658478] split_vma+0xc6/0x110 [ 31.658916] mprotect_fixup+0x8d2/0xb30 [ 31.659422] do_mprotect_pkey+0x87e/0xd40 [ 31.659948] __x64_sys_mprotect+0x78/0xc0 [ 31.660517] do_syscall_64+0x3f/0x90 [ 31.660989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.661629] [ 31.661840] Freed by task 213: [ 31.662237] kasan_save_stack+0x22/0x50 [ 31.662736] kasan_set_track+0x25/0x30 [ 31.663237] kasan_save_free_info+0x2b/0x50 [ 31.663775] __kasan_slab_free+0x10a/0x190 [ 31.664330] kmem_cache_free+0x10d/0x4d0 [ 31.664857] rcu_core+0x8c8/0x2860 [ 31.665317] __do_softirq+0x1b7/0x7d4 [ 31.665798] [ 31.666011] Last potentially related work creation: [ 31.666609] kasan_save_stack+0x22/0x50 [ 31.667120] __kasan_record_aux_stack+0x8e/0xa0 [ 31.667707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.668368] remove_vma+0x139/0x170 [ 31.668818] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.669390] do_vmi_munmap+0x1f1/0x2b0 [ 31.669882] __vm_munmap+0x138/0x3a0 [ 31.670350] __x64_sys_munmap+0x59/0x80 [ 31.670844] do_syscall_64+0x3f/0x90 [ 31.671326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.671969] [ 31.672203] Second to last potentially related work creation: [ 31.672892] kasan_save_stack+0x22/0x50 [ 31.673400] __kasan_record_aux_stack+0x8e/0xa0 [ 31.673984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.674634] remove_vma+0x139/0x170 [ 31.675095] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.675657] do_vmi_munmap+0x1f1/0x2b0 [ 31.676156] mmap_region+0x1f9/0x2660 [ 31.676635] do_mmap+0x854/0xf00 [ 31.677065] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.677556] ksys_mmap_pgoff+0x3af/0x500 [ 31.678063] do_syscall_64+0x3f/0x90 [ 31.678543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.679197] [ 31.679413] The buggy address belongs to the object at ffff88800deceae0 [ 31.679413] which belongs to the cache vm_area_struct of size 168 [ 31.680919] The buggy address is located 88 bytes inside of [ 31.680919] freed 168-byte region [ffff88800deceae0, ffff88800deceb88) [ 31.682328] [ 31.682541] The buggy address belongs to the physical page: [ 31.683201] page:000000005596ab24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdece [ 31.684304] memcg:ffff88800db46d01 [ 31.684743] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.685400] page_type: 0xffffffff() [ 31.685853] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b9880 dead000000000002 [ 31.686813] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db46d01 [ 31.687724] page dumped because: kasan: bad access detected [ 31.688397] [ 31.688615] Memory state around the buggy address: [ 31.689200] ffff88800decea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.690064] ffff88800decea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.690925] >ffff88800deceb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.691788] ^ [ 31.692383] ffff88800deceb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.693229] ffff88800decec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.694084] ================================================================== [ 31.695180] Disabling lock debugging due to kernel taint [ 33.575940] BUG: Bad rss-counter state mm:0000000018229a09 type:MM_FILEPAGES val:33 [ 33.576994] BUG: Bad rss-counter state mm:0000000018229a09 type:MM_ANONPAGES val:22 [ 34.008031] BUG: Bad rss-counter state mm:00000000f00c5959 type:MM_FILEPAGES val:33 [ 34.009271] BUG: Bad rss-counter state mm:00000000f00c5959 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25762' (ECDSA) to the list of known hosts. 2023/06/21 02:52:56 fuzzer started 2023/06/21 02:52:56 dialing manager at localhost:36067 2023/06/21 02:52:56 checking machine... 2023/06/21 02:52:56 checking revisions... [ 34.698425] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:52:56 testing simple program... [ 34.758423] cgroup: Unknown subsys name 'net' [ 34.824344] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:52:56 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88800ff778d0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000040003 R12=0000000000000283 R13=ffff888019a14178 R14=ffffffff81803033 R15=0000000080040002 RIP=ffffffff812d135c RFL=00000006 [-----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 00007f0065e3f900 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=00007ffe1a3ad000 CR3=000000000ffae000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffe640a4888 CR3=000000000f29e000 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=2035353a32353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a32353a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000