[ 31.424837] BUG: Bad rss-counter state mm:00000000c80dcf60 type:MM_FILEPAGES val:33 [ 31.425839] BUG: Bad rss-counter state mm:00000000c80dcf60 type:MM_ANONPAGES val:22 [ 31.591124] ================================================================== [ 31.592246] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.593384] Read of size 8 at addr ffff88800e0b6968 by task sshd/220 [ 31.594457] [ 31.594722] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.595799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.597070] Call Trace: [ 31.597464] [ 31.597822] dump_stack_lvl+0x91/0xf0 [ 31.598421] print_report+0xcc/0x620 [ 31.599008] ? __virt_addr_valid+0x102/0x340 [ 31.599693] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600471] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.601237] kasan_report+0xbe/0xf0 [ 31.601812] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.602577] vma_interval_tree_remove+0xc75/0xec0 [ 31.603326] vma_prepare+0xc54/0x11a0 [ 31.603917] __split_vma+0x5af/0x950 [ 31.604490] ? __pfx___split_vma+0x10/0x10 [ 31.605144] ? find_held_lock+0x2c/0x110 [ 31.605789] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.606477] ? lock_is_held_type+0x9f/0x120 [ 31.607136] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.607907] ? mtree_range_walk+0x632/0x900 [ 31.608447] ? mas_walk+0x5c7/0x7c0 [ 31.608908] do_vmi_munmap+0x1f1/0x2b0 [ 31.609391] mmap_region+0x1f9/0x2660 [ 31.609859] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.610345] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.611014] ? __pfx_lock_acquire+0x10/0x10 [ 31.611519] ? __pfx_mmap_region+0x10/0x10 [ 31.612028] ? security_mmap_addr+0x7d/0xa0 [ 31.612528] ? get_unmapped_area+0x1f5/0x3f0 [ 31.613053] do_mmap+0x854/0xf00 [ 31.613468] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.613936] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.614467] ksys_mmap_pgoff+0x3af/0x500 [ 31.614948] do_syscall_64+0x3f/0x90 [ 31.615407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.616028] RIP: 0033:0x7f539d702d82 [ 31.616462] 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 [ 31.618492] RSP: 002b:00007ffe27f6a7b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.619358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f539d702d82 [ 31.620207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f539cb3c000 [ 31.621042] RBP: 00007f539cb3c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.621874] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fdfdcadf60 [ 31.622712] R13: 00007ffe27f6a7d0 R14: 00007ffe27f6a800 R15: 00007ffe27f6ab60 [ 31.623551] [ 31.623835] [ 31.624057] Allocated by task 212: [ 31.624478] kasan_save_stack+0x22/0x50 [ 31.624974] kasan_set_track+0x25/0x30 [ 31.625454] __kasan_slab_alloc+0x59/0x70 [ 31.625956] kmem_cache_alloc+0x16b/0x370 [ 31.626447] vm_area_dup+0x20/0x160 [ 31.626878] __split_vma+0x170/0x950 [ 31.627318] split_vma+0xc6/0x110 [ 31.627736] mprotect_fixup+0x8d2/0xb30 [ 31.628226] do_mprotect_pkey+0x87e/0xd40 [ 31.628719] __x64_sys_mprotect+0x78/0xc0 [ 31.629212] do_syscall_64+0x3f/0x90 [ 31.629662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630268] [ 31.630475] Freed by task 212: [ 31.630846] kasan_save_stack+0x22/0x50 [ 31.631323] kasan_set_track+0x25/0x30 [ 31.631787] kasan_save_free_info+0x2b/0x50 [ 31.632300] __kasan_slab_free+0x10a/0x190 [ 31.632802] kmem_cache_free+0x10d/0x4d0 [ 31.633285] rcu_core+0x8c8/0x2860 [ 31.633705] __do_softirq+0x1b7/0x7d4 [ 31.634162] [ 31.634368] Last potentially related work creation: [ 31.634924] kasan_save_stack+0x22/0x50 [ 31.635404] __kasan_record_aux_stack+0x8e/0xa0 [ 31.635975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.636609] remove_vma+0x139/0x170 [ 31.637049] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.637609] do_vmi_munmap+0x1f1/0x2b0 [ 31.638098] __vm_munmap+0x138/0x3a0 [ 31.638560] __x64_sys_munmap+0x59/0x80 [ 31.639055] do_syscall_64+0x3f/0x90 [ 31.639527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.640176] [ 31.640386] Second to last potentially related work creation: [ 31.641057] kasan_save_stack+0x22/0x50 [ 31.641561] __kasan_record_aux_stack+0x8e/0xa0 [ 31.642123] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.642764] remove_vma+0x139/0x170 [ 31.643209] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.643761] do_vmi_munmap+0x1f1/0x2b0 [ 31.644249] mmap_region+0x1f9/0x2660 [ 31.644721] do_mmap+0x854/0xf00 [ 31.645143] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.645631] ksys_mmap_pgoff+0x3af/0x500 [ 31.646129] do_syscall_64+0x3f/0x90 [ 31.646602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.647239] [ 31.647454] The buggy address belongs to the object at ffff88800e0b6910 [ 31.647454] which belongs to the cache vm_area_struct of size 168 [ 31.648943] The buggy address is located 88 bytes inside of [ 31.648943] freed 168-byte region [ffff88800e0b6910, ffff88800e0b69b8) [ 31.650346] [ 31.650562] The buggy address belongs to the physical page: [ 31.651213] page:00000000d6b28987 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b6 [ 31.652303] memcg:ffff88800ed3ef01 [ 31.652726] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.653360] page_type: 0xffffffff() [ 31.653809] raw: 0100000000000200 ffff8880087a0c80 ffffea00003280c0 dead000000000006 [ 31.654731] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed3ef01 [ 31.655630] page dumped because: kasan: bad access detected [ 31.656309] [ 31.656527] Memory state around the buggy address: [ 31.657106] ffff88800e0b6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.657951] ffff88800e0b6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.658815] >ffff88800e0b6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.659660] ^ [ 31.660448] ffff88800e0b6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.661307] ffff88800e0b6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.662157] ================================================================== [ 31.663455] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.688012] BUG: Bad rss-counter state mm:000000007db0c57d type:MM_FILEPAGES val:33 [ 33.689170] BUG: Bad rss-counter state mm:000000007db0c57d type:MM_ANONPAGES val:22 [ 34.028820] BUG: Bad rss-counter state mm:00000000831c8ca3 type:MM_FILEPAGES val:33 [ 34.029536] BUG: Bad rss-counter state mm:00000000831c8ca3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25017' (ECDSA) to the list of known hosts. 2023/06/20 22:48:58 fuzzer started 2023/06/20 22:48:58 dialing manager at localhost:36067 2023/06/20 22:48:58 checking machine... 2023/06/20 22:48:58 checking revisions... [ 34.651962] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:48:58 testing simple program... [ 34.700119] cgroup: Unknown subsys name 'net' [ 34.737934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:48:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008cdc300 RCX=ffff888008cdc34c RDX=0000000000000004 RSI=000000000000006c RDI=0000000000000000 RBP=ffff888016470000 RSP=ffff88800d1373c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800cadab40 R13=00000000ffffffff R14=00000000ffffffff R15=000000000000006c RIP=ffffffff814c03a4 RFL=00000246 [---Z-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 00007ff483baf900 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=00007ff484166618 CR3=0000000009a40000 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=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=0000000080000000 RBX=ffff8880190a7a70 RCX=0000000000000000 RDX=ffffffff813782f8 RSI=ffff8880190a7a70 RDI=ffff8880087b8500 RBP=ffff88806cf09e58 RSP=ffff88806cf09e20 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880087b8500 R13=ffffea0000642980 R14=ffffffff813782f8 R15=ffff88800db8fc80 RIP=ffffffff8180c95b RFL=00000246 [---Z-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 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=00007fe90cadce50 CR3=000000000ecb8000 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=2038353a38343a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a38343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000