[ 30.594118] BUG: Bad rss-counter state mm:00000000f1a51c9e type:MM_FILEPAGES val:33 [ 30.595332] BUG: Bad rss-counter state mm:00000000f1a51c9e type:MM_ANONPAGES val:22 [ 30.635953] ================================================================== [ 30.636994] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.637957] Read of size 8 at addr ffff88801b098310 by task sshd/218 [ 30.638755] [ 30.638980] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.639867] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.640882] Call Trace: [ 30.641212] [ 30.641498] dump_stack_lvl+0x91/0xf0 [ 30.641999] print_report+0xcc/0x620 [ 30.642491] ? __virt_addr_valid+0x102/0x340 [ 30.643064] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643710] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644345] kasan_report+0xbe/0xf0 [ 30.644841] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.645471] vma_interval_tree_remove+0xc75/0xec0 [ 30.646077] vma_prepare+0xc54/0x11a0 [ 30.646557] __split_vma+0x5af/0x950 [ 30.647035] ? __pfx___split_vma+0x10/0x10 [ 30.647575] ? find_held_lock+0x2c/0x110 [ 30.648111] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.648703] ? lock_is_held_type+0x9f/0x120 [ 30.649257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.649881] ? mtree_range_walk+0x632/0x900 [ 30.650449] ? mas_walk+0x5c7/0x7c0 [ 30.650932] do_vmi_munmap+0x1f1/0x2b0 [ 30.651439] mmap_region+0x1f9/0x2660 [ 30.651922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.652436] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.653171] ? __pfx_lock_acquire+0x10/0x10 [ 30.653707] ? __pfx_mmap_region+0x10/0x10 [ 30.654244] ? security_mmap_addr+0x7d/0xa0 [ 30.654775] ? get_unmapped_area+0x1f5/0x3f0 [ 30.655326] do_mmap+0x854/0xf00 [ 30.655763] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.656257] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.656829] ksys_mmap_pgoff+0x3af/0x500 [ 30.657336] do_syscall_64+0x3f/0x90 [ 30.657818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658467] RIP: 0033:0x7fe1d261dd82 [ 30.658922] 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 [ 30.661064] RSP: 002b:00007ffe3b635c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.661972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1d261dd82 [ 30.662955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1d1a57000 [ 30.663802] RBP: 00007fe1d1a57000 R08: 0000000000000009 R09: 0000000000001000 [ 30.664660] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8b1d13980 [ 30.665533] R13: 00007ffe3b635c40 R14: 00007ffe3b635c70 R15: 00007ffe3b635fd0 [ 30.666403] [ 30.666694] [ 30.666910] Allocated by task 209: [ 30.667343] kasan_save_stack+0x22/0x50 [ 30.667852] kasan_set_track+0x25/0x30 [ 30.668348] __kasan_slab_alloc+0x59/0x70 [ 30.668876] kmem_cache_alloc+0x16b/0x370 [ 30.669395] vm_area_dup+0x20/0x160 [ 30.669850] __split_vma+0x170/0x950 [ 30.670315] split_vma+0xc6/0x110 [ 30.670756] mprotect_fixup+0x8d2/0xb30 [ 30.671261] do_mprotect_pkey+0x87e/0xd40 [ 30.671785] __x64_sys_mprotect+0x78/0xc0 [ 30.672312] do_syscall_64+0x3f/0x90 [ 30.672808] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.673455] [ 30.673667] Freed by task 209: [ 30.674064] kasan_save_stack+0x22/0x50 [ 30.674571] kasan_set_track+0x25/0x30 [ 30.675068] kasan_save_free_info+0x2b/0x50 [ 30.675601] __kasan_slab_free+0x10a/0x190 [ 30.676134] kmem_cache_free+0x10d/0x4d0 [ 30.676646] rcu_core+0x8c8/0x2860 [ 30.677090] __do_softirq+0x1b7/0x7d4 [ 30.677571] [ 30.677783] Last potentially related work creation: [ 30.678379] kasan_save_stack+0x22/0x50 [ 30.678883] __kasan_record_aux_stack+0x8e/0xa0 [ 30.679459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.680107] remove_vma+0x139/0x170 [ 30.680563] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.681119] do_vmi_munmap+0x1f1/0x2b0 [ 30.681607] __vm_munmap+0x138/0x3a0 [ 30.682075] __x64_sys_munmap+0x59/0x80 [ 30.682571] do_syscall_64+0x3f/0x90 [ 30.683047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.683695] [ 30.683912] The buggy address belongs to the object at ffff88801b0982b8 [ 30.683912] which belongs to the cache vm_area_struct of size 168 [ 30.685405] The buggy address is located 88 bytes inside of [ 30.685405] freed 168-byte region [ffff88801b0982b8, ffff88801b098360) [ 30.686813] [ 30.687028] The buggy address belongs to the physical page: [ 30.687692] page:00000000acf1cbd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b098 [ 30.688797] memcg:ffff88801b023c01 [ 30.689223] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.689872] page_type: 0xffffffff() [ 30.690326] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.691253] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b023c01 [ 30.692162] page dumped because: kasan: bad access detected [ 30.692841] [ 30.693056] Memory state around the buggy address: [ 30.693647] ffff88801b098200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.694511] ffff88801b098280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.695370] >ffff88801b098300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.696227] ^ [ 30.696703] ffff88801b098380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.697566] ffff88801b098400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.698421] ================================================================== [ 30.699553] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.192150] BUG: Bad rss-counter state mm:0000000074a4570c type:MM_FILEPAGES val:33 [ 33.193697] BUG: Bad rss-counter state mm:0000000074a4570c type:MM_ANONPAGES val:22 [ 33.552620] BUG: Bad rss-counter state mm:000000009dd69e48 type:MM_FILEPAGES val:33 [ 33.553638] BUG: Bad rss-counter state mm:000000009dd69e48 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10029' (ECDSA) to the list of known hosts. 2023/06/20 16:41:43 fuzzer started 2023/06/20 16:41:43 dialing manager at localhost:36067 2023/06/20 16:41:43 checking machine... 2023/06/20 16:41:43 checking revisions... [ 34.310098] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:41:43 testing simple program... [ 34.363950] cgroup: Unknown subsys name 'net' [ 34.428119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:41:43 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fa5c253d900 CR3=000000001599e000 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=2032343a31343a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a31343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09d7d RBX=ffffffff8604ebe8 RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff88801678eee0 R8 =ffffffff864b2008 R9 =ffff88801678efd8 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----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 00007f161f4f7900 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=00007f161f49c008 CR3=000000000f266000 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=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