[ 24.679342] BUG: Bad rss-counter state mm:00000000ec91f74a type:MM_FILEPAGES val:33 [ 24.680363] BUG: Bad rss-counter state mm:00000000ec91f74a type:MM_ANONPAGES val:22 [ 24.717640] ================================================================== [ 24.718704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.719746] Read of size 8 at addr ffff888019a233f8 by task sshd/220 [ 24.720267] [ 24.720410] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.720997] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.721690] Call Trace: [ 24.721910] [ 24.722100] dump_stack_lvl+0x91/0xf0 [ 24.722432] print_report+0xcc/0x620 [ 24.722762] ? __virt_addr_valid+0x102/0x340 [ 24.723131] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.723572] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.723989] kasan_report+0xbe/0xf0 [ 24.724304] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.724720] vma_interval_tree_remove+0xc75/0xec0 [ 24.725128] vma_prepare+0xc54/0x11a0 [ 24.725455] __split_vma+0x5af/0x950 [ 24.725777] ? __pfx___split_vma+0x10/0x10 [ 24.726140] ? find_held_lock+0x2c/0x110 [ 24.726494] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.726874] ? lock_is_held_type+0x9f/0x120 [ 24.727232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.727644] ? mtree_range_walk+0x632/0x900 [ 24.728011] ? mas_walk+0x5c7/0x7c0 [ 24.728325] do_vmi_munmap+0x1f1/0x2b0 [ 24.728657] mmap_region+0x1f9/0x2660 [ 24.728974] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.729317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.729796] ? __pfx_lock_acquire+0x10/0x10 [ 24.730151] ? __pfx_mmap_region+0x10/0x10 [ 24.730499] ? security_mmap_addr+0x7d/0xa0 [ 24.730851] ? get_unmapped_area+0x1f5/0x3f0 [ 24.731213] do_mmap+0x854/0xf00 [ 24.731507] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.731834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.732205] ksys_mmap_pgoff+0x3af/0x500 [ 24.732539] do_syscall_64+0x3f/0x90 [ 24.732856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.733286] RIP: 0033:0x7f2e17417d82 [ 24.733594] 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 [ 24.735014] RSP: 002b:00007ffdbef84f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.735634] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e17417d82 [ 24.736195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e16851000 [ 24.736759] RBP: 00007f2e16851000 R08: 0000000000000009 R09: 0000000000001000 [ 24.737304] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558541881b20 [ 24.737841] R13: 00007ffdbef84f30 R14: 00007ffdbef84f60 R15: 00007ffdbef852c0 [ 24.738386] [ 24.738571] [ 24.738708] Allocated by task 213: [ 24.738980] kasan_save_stack+0x22/0x50 [ 24.739300] kasan_set_track+0x25/0x30 [ 24.739642] __kasan_slab_alloc+0x59/0x70 [ 24.739989] kmem_cache_alloc+0x16b/0x370 [ 24.740331] vm_area_dup+0x20/0x160 [ 24.740631] __split_vma+0x170/0x950 [ 24.740932] split_vma+0xc6/0x110 [ 24.741222] mprotect_fixup+0x8d2/0xb30 [ 24.741550] do_mprotect_pkey+0x87e/0xd40 [ 24.741892] __x64_sys_mprotect+0x78/0xc0 [ 24.742235] do_syscall_64+0x3f/0x90 [ 24.742548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.742958] [ 24.743100] Freed by task 213: [ 24.743369] kasan_save_stack+0x22/0x50 [ 24.743702] kasan_set_track+0x25/0x30 [ 24.744029] kasan_save_free_info+0x2b/0x50 [ 24.744383] __kasan_slab_free+0x10a/0x190 [ 24.744744] kmem_cache_free+0x10d/0x4d0 [ 24.745084] rcu_core+0x8c8/0x2860 [ 24.745376] __do_softirq+0x1b7/0x7d4 [ 24.745691] [ 24.745837] Last potentially related work creation: [ 24.746227] kasan_save_stack+0x22/0x50 [ 24.746560] __kasan_record_aux_stack+0x8e/0xa0 [ 24.746943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.747383] remove_vma+0x139/0x170 [ 24.747687] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.748058] do_vmi_munmap+0x1f1/0x2b0 [ 24.748382] __vm_munmap+0x138/0x3a0 [ 24.748689] __x64_sys_munmap+0x59/0x80 [ 24.749018] do_syscall_64+0x3f/0x90 [ 24.749330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.749758] [ 24.749900] The buggy address belongs to the object at ffff888019a233a0 [ 24.749900] which belongs to the cache vm_area_struct of size 168 [ 24.750872] The buggy address is located 88 bytes inside of [ 24.750872] freed 168-byte region [ffff888019a233a0, ffff888019a23448) [ 24.751814] [ 24.751956] The buggy address belongs to the physical page: [ 24.752394] page:000000002feb0707 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a23 [ 24.753132] memcg:ffff88801a579901 [ 24.753418] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.753849] page_type: 0xffffffff() [ 24.754148] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.754765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a579901 [ 24.755378] page dumped because: kasan: bad access detected [ 24.755830] [ 24.755975] Memory state around the buggy address: [ 24.756362] ffff888019a23280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.756929] ffff888019a23300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.757503] >ffff888019a23380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.758070] ^ [ 24.758624] ffff888019a23400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.759184] ffff888019a23480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.759763] ================================================================== [ 24.760455] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.131300] BUG: Bad rss-counter state mm:00000000cd91acb5 type:MM_FILEPAGES val:33 [ 27.132410] BUG: Bad rss-counter state mm:00000000cd91acb5 type:MM_ANONPAGES val:22 [ 27.694963] BUG: Bad rss-counter state mm:000000007dace22f type:MM_FILEPAGES val:33 [ 27.696127] BUG: Bad rss-counter state mm:000000007dace22f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18160' (ECDSA) to the list of known hosts. 2023/06/20 07:56:22 fuzzer started 2023/06/20 07:56:22 dialing manager at localhost:44161 2023/06/20 07:56:22 checking machine... 2023/06/20 07:56:22 checking revisions... [ 28.364734] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:56:22 testing simple program... [ 28.412173] cgroup: Unknown subsys name 'net' [ 28.461266] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:21 Registers: info registers vcpu 0 RAX=ffff888016a90148 RBX=0000000000000001 RCX=ffff888016a90148 RDX=0000000000000527 RSI=0000000000000001 RDI=ffff888016a9015c RBP=ffff888016a9f910 RSP=ffff888016a9f880 R8 =0000000000000001 R9 =0000000000000388 R10=0000000000000001 R11=0000000000000000 R12=ffff888016a90080 R13=ffffffff85d3d001 R14=000000000000019f R15=000000066c449c00 RIP=ffffffff812938c4 RFL=00000016 [----AP-] 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 00007fd57ae42900 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=00007fd57a2cf8a8 CR3=000000000ed74000 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=550bf004339acb927d4dfb94622e8692 XMM02=ec2efd57dc4c00df000000000011f2b8 XMM03=62fcad3a4b5f6616000000000011f388 XMM04=d71e3fa988fb1ace00000000000ae988 XMM05=19e9129bd510f2350000000000132818 XMM06=9edd1c624c4d860a0000000000131288 XMM07=e042d86d42eb936e00000000001231e8 XMM08=62fcad3a4b5f6616000000000011f388 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=00007fff61a294e8 CR3=000000000e956000 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=2031323a36353a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a36353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000