syzkaller login: [ 30.528592] BUG: Bad rss-counter state mm:00000000da601020 type:MM_FILEPAGES val:33 [ 30.529593] BUG: Bad rss-counter state mm:00000000da601020 type:MM_ANONPAGES val:22 [ 30.706338] ================================================================== [ 30.707343] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.708347] Read of size 8 at addr ffff888017edb798 by task sshd/220 [ 30.709257] [ 30.709489] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.710400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.711494] Call Trace: [ 30.711841] [ 30.712145] dump_stack_lvl+0x91/0xf0 [ 30.712669] print_report+0xcc/0x620 [ 30.713182] ? __virt_addr_valid+0x102/0x340 [ 30.713777] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.714430] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.715106] kasan_report+0xbe/0xf0 [ 30.715612] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716266] vma_interval_tree_remove+0xc75/0xec0 [ 30.716906] vma_prepare+0xc54/0x11a0 [ 30.717413] __split_vma+0x5af/0x950 [ 30.717921] ? __pfx___split_vma+0x10/0x10 [ 30.718470] ? find_held_lock+0x2c/0x110 [ 30.719040] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.719629] ? lock_is_held_type+0x9f/0x120 [ 30.720192] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.720820] ? mtree_range_walk+0x632/0x900 [ 30.721400] ? mas_walk+0x5c7/0x7c0 [ 30.721906] do_vmi_munmap+0x1f1/0x2b0 [ 30.722425] mmap_region+0x1f9/0x2660 [ 30.722939] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.723473] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.724224] ? __pfx_lock_acquire+0x10/0x10 [ 30.724785] ? __pfx_mmap_region+0x10/0x10 [ 30.725343] ? security_mmap_addr+0x7d/0xa0 [ 30.725894] ? get_unmapped_area+0x1f5/0x3f0 [ 30.726467] do_mmap+0x854/0xf00 [ 30.726940] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.727468] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.728056] ksys_mmap_pgoff+0x3af/0x500 [ 30.728585] do_syscall_64+0x3f/0x90 [ 30.729086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.729783] RIP: 0033:0x7f8449d96d82 [ 30.730269] 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 [ 30.732548] RSP: 002b:00007ffd3bfe4e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.733500] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8449d96d82 [ 30.734389] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84491d0000 [ 30.735295] RBP: 00007f84491d0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.736205] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c570631b20 [ 30.737086] R13: 00007ffd3bfe4e60 R14: 00007ffd3bfe4e90 R15: 00007ffd3bfe51f0 [ 30.737966] [ 30.738266] [ 30.738487] Allocated by task 213: [ 30.738934] kasan_save_stack+0x22/0x50 [ 30.739453] kasan_set_track+0x25/0x30 [ 30.739970] __kasan_slab_alloc+0x59/0x70 [ 30.740511] kmem_cache_alloc+0x16b/0x370 [ 30.741047] vm_area_dup+0x20/0x160 [ 30.741518] __split_vma+0x170/0x950 [ 30.742005] split_vma+0xc6/0x110 [ 30.742464] mprotect_fixup+0x8d2/0xb30 [ 30.743004] do_mprotect_pkey+0x87e/0xd40 [ 30.743547] __x64_sys_mprotect+0x78/0xc0 [ 30.744118] do_syscall_64+0x3f/0x90 [ 30.744607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.745268] [ 30.745493] Freed by task 213: [ 30.745904] kasan_save_stack+0x22/0x50 [ 30.746423] kasan_set_track+0x25/0x30 [ 30.746943] kasan_save_free_info+0x2b/0x50 [ 30.747493] __kasan_slab_free+0x10a/0x190 [ 30.748039] kmem_cache_free+0x10d/0x4d0 [ 30.748559] rcu_core+0x8c8/0x2860 [ 30.749022] __do_softirq+0x1b7/0x7d4 [ 30.749518] [ 30.749739] Last potentially related work creation: [ 30.750342] kasan_save_stack+0x22/0x50 [ 30.750882] __kasan_record_aux_stack+0x8e/0xa0 [ 30.751481] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.752149] remove_vma+0x139/0x170 [ 30.752614] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.753189] do_vmi_munmap+0x1f1/0x2b0 [ 30.753688] __vm_munmap+0x138/0x3a0 [ 30.754170] __x64_sys_munmap+0x59/0x80 [ 30.754682] do_syscall_64+0x3f/0x90 [ 30.755176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.755828] [ 30.756049] The buggy address belongs to the object at ffff888017edb740 [ 30.756049] which belongs to the cache vm_area_struct of size 168 [ 30.757539] The buggy address is located 88 bytes inside of [ 30.757539] freed 168-byte region [ffff888017edb740, ffff888017edb7e8) [ 30.758977] [ 30.759197] The buggy address belongs to the physical page: [ 30.759865] page:00000000fde38bc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17edb [ 30.760990] memcg:ffff888018c1ae01 [ 30.761429] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.762088] page_type: 0xffffffff() [ 30.762545] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.763502] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c1ae01 [ 30.764426] page dumped because: kasan: bad access detected [ 30.765104] [ 30.765323] Memory state around the buggy address: [ 30.765911] ffff888017edb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.766797] ffff888017edb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.767678] >ffff888017edb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.768557] ^ [ 30.769066] ffff888017edb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.769934] ffff888017edb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.770812] ================================================================== [ 30.771892] Disabling lock debugging due to kernel taint [ 32.714416] BUG: Bad rss-counter state mm:000000008e19fe08 type:MM_FILEPAGES val:33 [ 32.715438] BUG: Bad rss-counter state mm:000000008e19fe08 type:MM_ANONPAGES val:22 [ 33.285293] BUG: Bad rss-counter state mm:0000000075be89b6 type:MM_FILEPAGES val:33 [ 33.286488] BUG: Bad rss-counter state mm:0000000075be89b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48720' (ECDSA) to the list of known hosts. 2023/06/21 03:28:19 fuzzer started 2023/06/21 03:28:20 dialing manager at localhost:36067 2023/06/21 03:28:20 checking machine... 2023/06/21 03:28:20 checking revisions... [ 33.801117] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:28:20 testing simple program... [ 33.845472] cgroup: Unknown subsys name 'net' [ 33.898508] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:28:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800681f338 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800681f390 RSP=ffff88800681f320 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800681f400 R13=0000000000000000 R14=ffff888006820000 R15=0000000000400cc0 RIP=ffffffff81130399 RFL=00000203 [------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 00007fe28bfb5900 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=00007fe28b418cb0 CR3=000000000d674000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a6f3273de3bb019200000000000ae988 XMM05=5f42ffad3866ab3200000000001329b0 XMM06=4fda316b135da52b00000000001317a0 XMM07=fb795ef6d65770560000000000121a50 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff8121b11b RDX=ffffed10011c1a3c RSI=0000000000000004 RDI=ffff888008e0d1d8 RBP=ffff8880087a63a0 RSP=ffff888008e37ec8 R8 =0000000000000001 R9 =ffffed10011c1a3b R10=ffff888008e0d1db R11=0000000000000000 R12=ffffffff854e8ec0 R13=ffff888008e0d1c0 R14=ffff888008e0d1c0 R15=0000000000000001 RIP=ffffffff81201214 RFL=00000282 [--S----] 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=00007f6a577970b0 CR3=0000000019e52000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000