syzkaller login: [ 31.549968] BUG: Bad rss-counter state mm:0000000042357378 type:MM_FILEPAGES val:33 [ 31.551188] BUG: Bad rss-counter state mm:0000000042357378 type:MM_ANONPAGES val:22 [ 31.708225] ================================================================== [ 31.709311] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.710538] Read of size 8 at addr ffff88800d5f94e0 by task sshd/221 [ 31.711449] [ 31.711671] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.712569] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.713582] Call Trace: [ 31.713922] [ 31.714214] dump_stack_lvl+0x91/0xf0 [ 31.714731] print_report+0xcc/0x620 [ 31.715246] ? __virt_addr_valid+0x102/0x340 [ 31.715816] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.717121] kasan_report+0xbe/0xf0 [ 31.717606] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.718229] vma_interval_tree_remove+0xc75/0xec0 [ 31.718833] vma_prepare+0xc54/0x11a0 [ 31.719316] __split_vma+0x5af/0x950 [ 31.719788] ? __pfx___split_vma+0x10/0x10 [ 31.720324] ? find_held_lock+0x2c/0x110 [ 31.720846] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.721432] ? lock_is_held_type+0x9f/0x120 [ 31.721976] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.722587] ? mtree_range_walk+0x632/0x900 [ 31.723144] ? mas_walk+0x5c7/0x7c0 [ 31.723625] do_vmi_munmap+0x1f1/0x2b0 [ 31.724121] mmap_region+0x1f9/0x2660 [ 31.724610] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.725131] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.725852] ? __pfx_lock_acquire+0x10/0x10 [ 31.726393] ? __pfx_mmap_region+0x10/0x10 [ 31.726924] ? security_mmap_addr+0x7d/0xa0 [ 31.727467] ? get_unmapped_area+0x1f5/0x3f0 [ 31.728026] do_mmap+0x854/0xf00 [ 31.728476] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.729006] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.729577] ksys_mmap_pgoff+0x3af/0x500 [ 31.730087] do_syscall_64+0x3f/0x90 [ 31.730576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.731224] RIP: 0033:0x7f9e3f482d82 [ 31.731690] 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 [ 31.733845] RSP: 002b:00007ffe4086e3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.734787] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e3f482d82 [ 31.735643] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e3e8bc000 [ 31.736499] RBP: 00007f9e3e8bc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.737360] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559b33d58ec0 [ 31.738216] R13: 00007ffe4086e3f0 R14: 00007ffe4086e420 R15: 00007ffe4086e780 [ 31.739083] [ 31.739374] [ 31.739590] Allocated by task 214: [ 31.740023] kasan_save_stack+0x22/0x50 [ 31.740530] kasan_set_track+0x25/0x30 [ 31.741043] __kasan_slab_alloc+0x59/0x70 [ 31.741568] kmem_cache_alloc+0x16b/0x370 [ 31.742088] vm_area_dup+0x20/0x160 [ 31.742542] __split_vma+0x170/0x950 [ 31.743007] split_vma+0xc6/0x110 [ 31.743454] mprotect_fixup+0x8d2/0xb30 [ 31.743959] do_mprotect_pkey+0x87e/0xd40 [ 31.744476] __x64_sys_mprotect+0x78/0xc0 [ 31.745006] do_syscall_64+0x3f/0x90 [ 31.745493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.746151] [ 31.746369] Freed by task 13: [ 31.746754] kasan_save_stack+0x22/0x50 [ 31.747256] kasan_set_track+0x25/0x30 [ 31.747749] kasan_save_free_info+0x2b/0x50 [ 31.748284] __kasan_slab_free+0x10a/0x190 [ 31.748819] kmem_cache_free+0x10d/0x4d0 [ 31.749343] rcu_core+0x8c8/0x2860 [ 31.749790] __do_softirq+0x1b7/0x7d4 [ 31.750275] [ 31.750498] Last potentially related work creation: [ 31.751088] kasan_save_stack+0x22/0x50 [ 31.751594] __kasan_record_aux_stack+0x8e/0xa0 [ 31.752175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.752823] remove_vma+0x139/0x170 [ 31.753303] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.753863] do_vmi_munmap+0x1f1/0x2b0 [ 31.754347] __vm_munmap+0x138/0x3a0 [ 31.754821] __x64_sys_munmap+0x59/0x80 [ 31.755323] do_syscall_64+0x3f/0x90 [ 31.755802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.756450] [ 31.756670] Second to last potentially related work creation: [ 31.757373] kasan_save_stack+0x22/0x50 [ 31.757885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.758473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.759126] remove_vma+0x139/0x170 [ 31.759585] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.760153] do_vmi_munmap+0x1f1/0x2b0 [ 31.760645] mmap_region+0x1f9/0x2660 [ 31.761150] do_mmap+0x854/0xf00 [ 31.761591] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.762084] ksys_mmap_pgoff+0x3af/0x500 [ 31.762597] do_syscall_64+0x3f/0x90 [ 31.763083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.763742] [ 31.763963] The buggy address belongs to the object at ffff88800d5f9488 [ 31.763963] which belongs to the cache vm_area_struct of size 168 [ 31.765450] The buggy address is located 88 bytes inside of [ 31.765450] freed 168-byte region [ffff88800d5f9488, ffff88800d5f9530) [ 31.766866] [ 31.767085] The buggy address belongs to the physical page: [ 31.767745] page:00000000dcf173c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5f9 [ 31.768848] memcg:ffff88800e141101 [ 31.769298] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.769955] page_type: 0xffffffff() [ 31.770419] raw: 0100000000000200 ffff8880087a0c80 ffffea0000374a40 dead000000000008 [ 31.771348] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e141101 [ 31.772261] page dumped because: kasan: bad access detected [ 31.772929] [ 31.773159] Memory state around the buggy address: [ 31.773740] ffff88800d5f9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.774625] ffff88800d5f9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.775501] >ffff88800d5f9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.776375] ^ [ 31.777145] ffff88800d5f9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.778028] ffff88800d5f9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.778905] ================================================================== [ 31.779892] Disabling lock debugging due to kernel taint [ 34.230360] BUG: Bad rss-counter state mm:00000000bf53fdef type:MM_FILEPAGES val:33 [ 34.231406] BUG: Bad rss-counter state mm:00000000bf53fdef type:MM_ANONPAGES val:22 [ 34.619890] BUG: Bad rss-counter state mm:00000000542f26c0 type:MM_FILEPAGES val:33 [ 34.620885] BUG: Bad rss-counter state mm:00000000542f26c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59638' (ECDSA) to the list of known hosts. 2023/06/20 16:53:54 fuzzer started 2023/06/20 16:53:54 dialing manager at localhost:36067 2023/06/20 16:53:54 checking machine... 2023/06/20 16:53:54 checking revisions... [ 35.406935] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:53:54 testing simple program... [ 35.455880] cgroup: Unknown subsys name 'net' [ 35.510343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:53:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015cd8f00 RCX=0000000000000000 RDX=ffff88800d9a0000 RSI=ffffffff818e8e6c RDI=0000000000000005 RBP=0000000000000008 RSP=ffff888018167c38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888015cd8f60 R14=0000000000000000 R15=ffff888015cd8f04 RIP=ffffffff818e8e6c RFL=00000293 [--S-A-C] 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 00007fae6f7d8900 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=00007ffea48ac000 CR3=000000000d968000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d350 RBX=0000000000000001 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=ffff88806cf09ff8 R12=0000000000000283 R13=ffff88800e9dc898 R14=ffffffff813782f8 R15=ffff888018098da8 RIP=ffffffff8180f036 RFL=00000002 [-------] 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=00007fcef0773210 CR3=000000000d85a000 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=418a4fd2c62b0c96ae41663fff2d02c9 XMM02=000000000011a288ec2efd57dc4c00df XMM03=00000000001217c843cd7afe7ab0ee76 XMM04=630522c850de2ec300000000000ae988 XMM05=e4cb8bb95a7664b60000000000132990 XMM06=cc1f8b41057469e700000000001317f8 XMM07=e042d86d42eb936e0000000000121a48 XMM08=43cd7afe7ab0ee76000000000011a2e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000