syzkaller login: [ 28.641477] BUG: Bad rss-counter state mm:00000000e9f0c417 type:MM_FILEPAGES val:33 [ 28.642460] BUG: Bad rss-counter state mm:00000000e9f0c417 type:MM_ANONPAGES val:22 [ 28.817730] ================================================================== [ 28.818634] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.819699] Read of size 8 at addr ffff88800e279df0 by task sshd/220 [ 28.820457] [ 28.820678] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.821561] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.822535] Call Trace: [ 28.822856] [ 28.823140] dump_stack_lvl+0x91/0xf0 [ 28.823660] print_report+0xcc/0x620 [ 28.824144] ? __virt_addr_valid+0x102/0x340 [ 28.824691] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.825298] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.825907] kasan_report+0xbe/0xf0 [ 28.826381] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.827012] vma_interval_tree_remove+0xc75/0xec0 [ 28.827654] vma_prepare+0xc54/0x11a0 [ 28.828141] __split_vma+0x5af/0x950 [ 28.828622] ? __pfx___split_vma+0x10/0x10 [ 28.829153] ? find_held_lock+0x2c/0x110 [ 28.829686] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.830257] ? lock_is_held_type+0x9f/0x120 [ 28.830799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.831433] ? mtree_range_walk+0x632/0x900 [ 28.831993] ? mas_walk+0x5c7/0x7c0 [ 28.832465] do_vmi_munmap+0x1f1/0x2b0 [ 28.832954] mmap_region+0x1f9/0x2660 [ 28.833440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.833949] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.834659] ? __pfx_lock_acquire+0x10/0x10 [ 28.835191] ? __pfx_mmap_region+0x10/0x10 [ 28.835770] ? security_mmap_addr+0x7d/0xa0 [ 28.836301] ? get_unmapped_area+0x1f5/0x3f0 [ 28.836866] do_mmap+0x854/0xf00 [ 28.837316] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.837815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.838382] ksys_mmap_pgoff+0x3af/0x500 [ 28.838886] do_syscall_64+0x3f/0x90 [ 28.839366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.840065] RIP: 0033:0x7fe7e634ad82 [ 28.840564] 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 [ 28.842729] RSP: 002b:00007fff878da568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.843667] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7e634ad82 [ 28.844527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7e5784000 [ 28.845370] RBP: 00007fe7e5784000 R08: 0000000000000009 R09: 0000000000001000 [ 28.846232] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1b4b9bf70 [ 28.847077] R13: 00007fff878da580 R14: 00007fff878da5b0 R15: 00007fff878da910 [ 28.847985] [ 28.848277] [ 28.848496] Allocated by task 213: [ 28.848929] kasan_save_stack+0x22/0x50 [ 28.849433] kasan_set_track+0x25/0x30 [ 28.849928] __kasan_slab_alloc+0x59/0x70 [ 28.850471] kmem_cache_alloc+0x16b/0x370 [ 28.850993] vm_area_dup+0x20/0x160 [ 28.851485] __split_vma+0x170/0x950 [ 28.851955] split_vma+0xc6/0x110 [ 28.852394] mprotect_fixup+0x8d2/0xb30 [ 28.852912] do_mprotect_pkey+0x87e/0xd40 [ 28.853443] __x64_sys_mprotect+0x78/0xc0 [ 28.853980] do_syscall_64+0x3f/0x90 [ 28.854456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.855122] [ 28.855343] Freed by task 13: [ 28.855756] kasan_save_stack+0x22/0x50 [ 28.856270] kasan_set_track+0x25/0x30 [ 28.856780] kasan_save_free_info+0x2b/0x50 [ 28.857328] __kasan_slab_free+0x10a/0x190 [ 28.857875] kmem_cache_free+0x10d/0x4d0 [ 28.858382] rcu_core+0x8c8/0x2860 [ 28.858834] __do_softirq+0x1b7/0x7d4 [ 28.859322] [ 28.859569] Last potentially related work creation: [ 28.860161] kasan_save_stack+0x22/0x50 [ 28.860679] __kasan_record_aux_stack+0x8e/0xa0 [ 28.861256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.861903] remove_vma+0x139/0x170 [ 28.862362] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.862928] do_vmi_munmap+0x1f1/0x2b0 [ 28.863443] __vm_munmap+0x138/0x3a0 [ 28.863922] __x64_sys_munmap+0x59/0x80 [ 28.864435] do_syscall_64+0x3f/0x90 [ 28.864915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.865563] [ 28.865788] Second to last potentially related work creation: [ 28.866494] kasan_save_stack+0x22/0x50 [ 28.867001] __kasan_record_aux_stack+0x8e/0xa0 [ 28.867619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.868262] remove_vma+0x139/0x170 [ 28.868718] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.869275] do_vmi_munmap+0x1f1/0x2b0 [ 28.869767] mmap_region+0x1f9/0x2660 [ 28.870249] do_mmap+0x854/0xf00 [ 28.870680] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.871167] ksys_mmap_pgoff+0x3af/0x500 [ 28.871697] do_syscall_64+0x3f/0x90 [ 28.872181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.872831] [ 28.873045] The buggy address belongs to the object at ffff88800e279d98 [ 28.873045] which belongs to the cache vm_area_struct of size 168 [ 28.874530] The buggy address is located 88 bytes inside of [ 28.874530] freed 168-byte region [ffff88800e279d98, ffff88800e279e40) [ 28.875978] [ 28.876198] The buggy address belongs to the physical page: [ 28.876862] page:000000004b9a5541 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe279 [ 28.877966] memcg:ffff88800e0dfa01 [ 28.878397] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.879109] page_type: 0xffffffff() [ 28.879586] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.880503] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0dfa01 [ 28.881421] page dumped because: kasan: bad access detected [ 28.882086] [ 28.882313] Memory state around the buggy address: [ 28.882905] ffff88800e279c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.883815] ffff88800e279d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.884692] >ffff88800e279d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.885565] ^ [ 28.886386] ffff88800e279e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.887252] ffff88800e279e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.888149] ================================================================== [ 28.889119] Disabling lock debugging due to kernel taint [ 30.710759] BUG: Bad rss-counter state mm:00000000139f8736 type:MM_FILEPAGES val:33 [ 30.711718] BUG: Bad rss-counter state mm:00000000139f8736 type:MM_ANONPAGES val:22 [ 31.176650] BUG: Bad rss-counter state mm:00000000b5211144 type:MM_FILEPAGES val:33 [ 31.177811] BUG: Bad rss-counter state mm:00000000b5211144 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56527' (ECDSA) to the list of known hosts. 2023/06/21 06:19:58 fuzzer started 2023/06/21 06:19:58 dialing manager at localhost:36067 2023/06/21 06:19:58 checking machine... 2023/06/21 06:19:58 checking revisions... [ 31.819842] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:19:59 testing simple program... [ 31.854044] cgroup: Unknown subsys name 'net' [ 31.885813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:19:58 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=00007fb6629e00f7 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8450cc8c RBP=0000000000000000 RSP=ffff888018637f70 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000202 R12=0000000000000000 R13=0000562c1b8e3c20 R14=0000000000000004 R15=0000000000000000 RIP=ffffffff84600135 RFL=00000046 [---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 00007fb662520900 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=00007ffe5bb89000 CR3=0000000018506000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f7db9dd0b90 CR3=0000000013a26000 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=609308fcc9f55e898e44f04c7b5ea60e XMM02=ec2efd57dc4c00df000000000011ddd8 XMM03=b70f7d9f86cd500c000000000011dea8 XMM04=f2c26f42f001919e00000000000ae988 XMM05=e4cb8bb95a7664b600000000001337e0 XMM06=c291bd5c70af25b90000000000133668 XMM07=e042d86d42eb936e0000000000122098 XMM08=b70f7d9f86cd500c000000000011dea8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000