syzkaller login: [ 32.510094] BUG: Bad rss-counter state mm:000000009cbefd95 type:MM_FILEPAGES val:33 [ 32.511309] BUG: Bad rss-counter state mm:000000009cbefd95 type:MM_ANONPAGES val:22 [ 32.602780] ================================================================== [ 32.603697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.604648] Read of size 8 at addr ffff88800fd19df0 by task sshd/220 [ 32.605415] [ 32.605634] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.606509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.607482] Call Trace: [ 32.607805] [ 32.608097] dump_stack_lvl+0x91/0xf0 [ 32.608609] print_report+0xcc/0x620 [ 32.609093] ? __virt_addr_valid+0x102/0x340 [ 32.609658] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.610275] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.610892] kasan_report+0xbe/0xf0 [ 32.611373] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.611997] vma_interval_tree_remove+0xc75/0xec0 [ 32.612610] vma_prepare+0xc54/0x11a0 [ 32.613087] __split_vma+0x5af/0x950 [ 32.613561] ? __pfx___split_vma+0x10/0x10 [ 32.614088] ? find_held_lock+0x2c/0x110 [ 32.614608] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.615169] ? lock_is_held_type+0x9f/0x120 [ 32.615702] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.616313] ? mtree_range_walk+0x632/0x900 [ 32.616886] ? mas_walk+0x5c7/0x7c0 [ 32.617360] do_vmi_munmap+0x1f1/0x2b0 [ 32.617857] mmap_region+0x1f9/0x2660 [ 32.618335] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.618841] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.619553] ? __pfx_lock_acquire+0x10/0x10 [ 32.620088] ? __pfx_mmap_region+0x10/0x10 [ 32.620623] ? security_mmap_addr+0x7d/0xa0 [ 32.621164] ? get_unmapped_area+0x1f5/0x3f0 [ 32.621713] do_mmap+0x854/0xf00 [ 32.622152] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.622646] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.623203] ksys_mmap_pgoff+0x3af/0x500 [ 32.623716] do_syscall_64+0x3f/0x90 [ 32.624193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.624863] RIP: 0033:0x7f631a2f2d82 [ 32.625315] 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 [ 32.627465] RSP: 002b:00007fffb2ca1e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.628374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f631a2f2d82 [ 32.629232] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f631972c000 [ 32.630080] RBP: 00007f631972c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.630947] R10: 0000000000000812 R11: 0000000000000206 R12: 000055701a373ec0 [ 32.631793] R13: 00007fffb2ca1e80 R14: 00007fffb2ca1eb0 R15: 00007fffb2ca2210 [ 32.632658] [ 32.632949] [ 32.633165] Allocated by task 213: [ 32.633600] kasan_save_stack+0x22/0x50 [ 32.634109] kasan_set_track+0x25/0x30 [ 32.634600] __kasan_slab_alloc+0x59/0x70 [ 32.635123] kmem_cache_alloc+0x16b/0x370 [ 32.635635] vm_area_dup+0x20/0x160 [ 32.636090] __split_vma+0x170/0x950 [ 32.636572] split_vma+0xc6/0x110 [ 32.637012] mprotect_fixup+0x8d2/0xb30 [ 32.637515] do_mprotect_pkey+0x87e/0xd40 [ 32.638031] __x64_sys_mprotect+0x78/0xc0 [ 32.638549] do_syscall_64+0x3f/0x90 [ 32.639022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.639657] [ 32.639875] Freed by task 213: [ 32.640271] kasan_save_stack+0x22/0x50 [ 32.640783] kasan_set_track+0x25/0x30 [ 32.641295] kasan_save_free_info+0x2b/0x50 [ 32.641830] __kasan_slab_free+0x10a/0x190 [ 32.642360] kmem_cache_free+0x10d/0x4d0 [ 32.642942] rcu_core+0x8c8/0x2860 [ 32.643388] __do_softirq+0x1b7/0x7d4 [ 32.643863] [ 32.644077] Last potentially related work creation: [ 32.644694] kasan_save_stack+0x22/0x50 [ 32.645203] __kasan_record_aux_stack+0x8e/0xa0 [ 32.645781] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.646419] remove_vma+0x139/0x170 [ 32.646871] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.647426] do_vmi_munmap+0x1f1/0x2b0 [ 32.647909] __vm_munmap+0x138/0x3a0 [ 32.648375] __x64_sys_munmap+0x59/0x80 [ 32.648884] do_syscall_64+0x3f/0x90 [ 32.649358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.650005] [ 32.650227] The buggy address belongs to the object at ffff88800fd19d98 [ 32.650227] which belongs to the cache vm_area_struct of size 168 [ 32.651693] The buggy address is located 88 bytes inside of [ 32.651693] freed 168-byte region [ffff88800fd19d98, ffff88800fd19e40) [ 32.653101] [ 32.653319] The buggy address belongs to the physical page: [ 32.653977] page:00000000bc91b411 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd19 [ 32.655062] memcg:ffff88801580b301 [ 32.655494] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.656140] page_type: 0xffffffff() [ 32.656610] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.657522] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801580b301 [ 32.658424] page dumped because: kasan: bad access detected [ 32.659084] [ 32.659300] Memory state around the buggy address: [ 32.659886] ffff88800fd19c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.660757] ffff88800fd19d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.661626] >ffff88800fd19d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.662474] ^ [ 32.663296] ffff88800fd19e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.664148] ffff88800fd19e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.665013] ================================================================== [ 32.666017] Disabling lock debugging due to kernel taint [ 34.381427] BUG: Bad rss-counter state mm:00000000b1ea8471 type:MM_FILEPAGES val:33 [ 34.382025] BUG: Bad rss-counter state mm:00000000b1ea8471 type:MM_ANONPAGES val:22 [ 34.751051] BUG: Bad rss-counter state mm:0000000091adc38e type:MM_FILEPAGES val:33 [ 34.751916] BUG: Bad rss-counter state mm:0000000091adc38e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45129' (ECDSA) to the list of known hosts. 2023/06/19 17:41:52 fuzzer started 2023/06/19 17:41:53 dialing manager at localhost:44161 2023/06/19 17:41:53 checking machine... 2023/06/19 17:41:53 checking revisions... [ 35.297197] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:41:53 testing simple program... [ 35.337677] cgroup: Unknown subsys name 'net' [ 35.371208] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:41:51 Registers: info registers vcpu 0 RAX=ffffffff844c1d8e RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110018bde15 RSI=ffffffff844c1d8e RDI=ffff88800c5ef118 RBP=ffff88800c5ef0e8 RSP=ffff88800c5ef048 R8 =0000000000000001 R9 =ffff88800c5ef090 R10=0000000000038001 R11=00000000000b3ea9 R12=ffff88800c5ef118 R13=0000000000000000 R14=ffff88800ef53680 R15=0000000000000000 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007ff4727a9900 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=00007ff47276e008 CR3=000000000e5a6000 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=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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f9b081e7770 CR3=000000000d72c000 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=1a95ae462bddc78ac1424a38dabe0a41 XMM02=ec2efd57dc4c00df000000000011cd80 XMM03=f7035ff115f8ca78000000000011ce50 XMM04=e64a82ff136f9fd200000000000ae988 XMM05=e4cb8bb95a7664b60000000000133e38 XMM06=72d9a58162b6bcce0000000000132ca0 XMM07=e042d86d42eb936e00000000001245b0 XMM08=f7035ff115f8ca78000000000011ce50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000