[syzbot] [arm-msm?] [net?] memory leak in radix_tree_insert (2)

From: syzbot
Date: Thu Dec 07 2023 - 19:52:38 EST

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Hello,

syzbot found the following issue on:

HEAD commit: 33cc938e65a9 Linux 6.7-rc4
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16ddf83ce80000
kernel config: https://syzkaller.appspot.com/x/.config?x=37d1b8bb20150e6
dashboard link: https://syzkaller.appspot.com/bug?extid=006987d1be3586e13555
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10276ebae80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=128c50d2e80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/bd6d7a5ff2af/disk-33cc938e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ce91b40ecddb/vmlinux-33cc938e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/5507257fe99e/bzImage-33cc938e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+006987d1be3586e13555@xxxxxxxxxxxxxxxxxxxxxxxxx

write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory
BUG: memory leak
unreferenced object 0xffff88810bbf56d8 (size 576):
comm "syz-executor250", pid 5051, jiffies 4294951219 (age 12.920s)
hex dump (first 32 bytes):
3c 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 <...............
f0 a9 2d 0c 81 88 ff ff f0 56 bf 0b 81 88 ff ff ..-......V......
backtrace:
[<ffffffff81631398>] kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]
[<ffffffff81631398>] slab_post_alloc_hook mm/slab.h:766 [inline]
[<ffffffff81631398>] slab_alloc_node mm/slub.c:3478 [inline]
[<ffffffff81631398>] slab_alloc mm/slub.c:3486 [inline]
[<ffffffff81631398>] __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
[<ffffffff81631398>] kmem_cache_alloc+0x298/0x430 mm/slub.c:3502
[<ffffffff84b5094c>] radix_tree_node_alloc.constprop.0+0x7c/0x1a0 lib/radix-tree.c:276
[<ffffffff84b524cf>] __radix_tree_create lib/radix-tree.c:624 [inline]
[<ffffffff84b524cf>] radix_tree_insert+0x14f/0x360 lib/radix-tree.c:712
[<ffffffff84ae105d>] qrtr_tx_wait net/qrtr/af_qrtr.c:277 [inline]
[<ffffffff84ae105d>] qrtr_node_enqueue+0x57d/0x630 net/qrtr/af_qrtr.c:348
[<ffffffff84ae26f6>] qrtr_bcast_enqueue+0x66/0xd0 net/qrtr/af_qrtr.c:891
[<ffffffff84ae32d2>] qrtr_sendmsg+0x232/0x450 net/qrtr/af_qrtr.c:992
[<ffffffff83ec3c32>] sock_sendmsg_nosec net/socket.c:730 [inline]
[<ffffffff83ec3c32>] __sock_sendmsg+0x52/0xa0 net/socket.c:745
[<ffffffff83ec3d7b>] sock_write_iter+0xfb/0x180 net/socket.c:1158
[<ffffffff816961a7>] call_write_iter include/linux/fs.h:2020 [inline]
[<ffffffff816961a7>] new_sync_write fs/read_write.c:491 [inline]
[<ffffffff816961a7>] vfs_write+0x327/0x590 fs/read_write.c:584
[<ffffffff816966fb>] ksys_write+0x13b/0x170 fs/read_write.c:637
[<ffffffff84b6ddcf>] do_syscall_x64 arch/x86/entry/common.c:51 [inline]
[<ffffffff84b6ddcf>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
[<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0x6b

BUG: memory leak
unreferenced object 0xffff88810bbf5920 (size 576):
comm "syz-executor250", pid 5051, jiffies 4294951219 (age 12.920s)
hex dump (first 32 bytes):
36 0f 01 00 00 00 00 00 d8 56 bf 0b 81 88 ff ff 6........V......
f0 a9 2d 0c 81 88 ff ff 38 59 bf 0b 81 88 ff ff ..-.....8Y......
backtrace:
[<ffffffff81631398>] kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]
[<ffffffff81631398>] slab_post_alloc_hook mm/slab.h:766 [inline]
[<ffffffff81631398>] slab_alloc_node mm/slub.c:3478 [inline]
[<ffffffff81631398>] slab_alloc mm/slub.c:3486 [inline]
[<ffffffff81631398>] __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
[<ffffffff81631398>] kmem_cache_alloc+0x298/0x430 mm/slub.c:3502
[<ffffffff84b5094c>] radix_tree_node_alloc.constprop.0+0x7c/0x1a0 lib/radix-tree.c:276
[<ffffffff84b524cf>] __radix_tree_create lib/radix-tree.c:624 [inline]
[<ffffffff84b524cf>] radix_tree_insert+0x14f/0x360 lib/radix-tree.c:712
[<ffffffff84ae105d>] qrtr_tx_wait net/qrtr/af_qrtr.c:277 [inline]
[<ffffffff84ae105d>] qrtr_node_enqueue+0x57d/0x630 net/qrtr/af_qrtr.c:348
[<ffffffff84ae26f6>] qrtr_bcast_enqueue+0x66/0xd0 net/qrtr/af_qrtr.c:891
[<ffffffff84ae32d2>] qrtr_sendmsg+0x232/0x450 net/qrtr/af_qrtr.c:992
[<ffffffff83ec3c32>] sock_sendmsg_nosec net/socket.c:730 [inline]
[<ffffffff83ec3c32>] __sock_sendmsg+0x52/0xa0 net/socket.c:745
[<ffffffff83ec3d7b>] sock_write_iter+0xfb/0x180 net/socket.c:1158
[<ffffffff816961a7>] call_write_iter include/linux/fs.h:2020 [inline]
[<ffffffff816961a7>] new_sync_write fs/read_write.c:491 [inline]
[<ffffffff816961a7>] vfs_write+0x327/0x590 fs/read_write.c:584
[<ffffffff816966fb>] ksys_write+0x13b/0x170 fs/read_write.c:637
[<ffffffff84b6ddcf>] do_syscall_x64 arch/x86/entry/common.c:51 [inline]
[<ffffffff84b6ddcf>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
[<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0x6b

BUG: memory leak
unreferenced object 0xffff88810c832000 (size 576):
comm "syz-executor250", pid 5051, jiffies 4294951219 (age 12.920s)
hex dump (first 32 bytes):
30 3f 01 00 00 00 00 00 20 59 bf 0b 81 88 ff ff 0?...... Y......
f0 a9 2d 0c 81 88 ff ff 18 20 83 0c 81 88 ff ff ..-...... ......
backtrace:
[<ffffffff81631398>] kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]
[<ffffffff81631398>] slab_post_alloc_hook mm/slab.h:766 [inline]
[<ffffffff81631398>] slab_alloc_node mm/slub.c:3478 [inline]
[<ffffffff81631398>] slab_alloc mm/slub.c:3486 [inline]
[<ffffffff81631398>] __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
[<ffffffff81631398>] kmem_cache_alloc+0x298/0x430 mm/slub.c:3502
[<ffffffff84b5094c>] radix_tree_node_alloc.constprop.0+0x7c/0x1a0 lib/radix-tree.c:276
[<ffffffff84b524cf>] __radix_tree_create lib/radix-tree.c:624 [inline]
[<ffffffff84b524cf>] radix_tree_insert+0x14f/0x360 lib/radix-tree.c:712
[<ffffffff84ae105d>] qrtr_tx_wait net/qrtr/af_qrtr.c:277 [inline]
[<ffffffff84ae105d>] qrtr_node_enqueue+0x57d/0x630 net/qrtr/af_qrtr.c:348
[<ffffffff84ae26f6>] qrtr_bcast_enqueue+0x66/0xd0 net/qrtr/af_qrtr.c:891
[<ffffffff84ae32d2>] qrtr_sendmsg+0x232/0x450 net/qrtr/af_qrtr.c:992
[<ffffffff83ec3c32>] sock_sendmsg_nosec net/socket.c:730 [inline]
[<ffffffff83ec3c32>] __sock_sendmsg+0x52/0xa0 net/socket.c:745
[<ffffffff83ec3d7b>] sock_write_iter+0xfb/0x180 net/socket.c:1158
[<ffffffff816961a7>] call_write_iter include/linux/fs.h:2020 [inline]
[<ffffffff816961a7>] new_sync_write fs/read_write.c:491 [inline]
[<ffffffff816961a7>] vfs_write+0x327/0x590 fs/read_write.c:584
[<ffffffff816966fb>] ksys_write+0x13b/0x170 fs/read_write.c:637
[<ffffffff84b6ddcf>] do_syscall_x64 arch/x86/entry/common.c:51 [inline]
[<ffffffff84b6ddcf>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
[<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0x6b

BUG: memory leak
unreferenced object 0xffff88810c832248 (size 576):
comm "syz-executor250", pid 5051, jiffies 4294951219 (age 12.920s)
hex dump (first 32 bytes):
2a 3f 00 00 00 00 00 00 00 20 83 0c 81 88 ff ff *?....... ......
f0 a9 2d 0c 81 88 ff ff 60 22 83 0c 81 88 ff ff ..-.....`"......
backtrace:
[<ffffffff81631398>] kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline]
[<ffffffff81631398>] slab_post_alloc_hook mm/slab.h:766 [inline]
[<ffffffff81631398>] slab_alloc_node mm/slub.c:3478 [inline]
[<ffffffff81631398>] slab_alloc mm/slub.c:3486 [inline]
[<ffffffff81631398>] __kmem_cache_alloc_lru mm/slub.c:3493 [inline]
[<ffffffff81631398>] kmem_cache_alloc+0x298/0x430 mm/slub.c:3502
[<ffffffff84b5094c>] radix_tree_node_alloc.constprop.0+0x7c/0x1a0 lib/radix-tree.c:276
[<ffffffff84b524cf>] __radix_tree_create lib/radix-tree.c:624 [inline]
[<ffffffff84b524cf>] radix_tree_insert+0x14f/0x360 lib/radix-tree.c:712
[<ffffffff84ae105d>] qrtr_tx_wait net/qrtr/af_qrtr.c:277 [inline]
[<ffffffff84ae105d>] qrtr_node_enqueue+0x57d/0x630 net/qrtr/af_qrtr.c:348
[<ffffffff84ae26f6>] qrtr_bcast_enqueue+0x66/0xd0 net/qrtr/af_qrtr.c:891
[<ffffffff84ae32d2>] qrtr_sendmsg+0x232/0x450 net/qrtr/af_qrtr.c:992
[<ffffffff83ec3c32>] sock_sendmsg_nosec net/socket.c:730 [inline]
[<ffffffff83ec3c32>] __sock_sendmsg+0x52/0xa0 net/socket.c:745
[<ffffffff83ec3d7b>] sock_write_iter+0xfb/0x180 net/socket.c:1158
[<ffffffff816961a7>] call_write_iter include/linux/fs.h:2020 [inline]
[<ffffffff816961a7>] new_sync_write fs/read_write.c:491 [inline]
[<ffffffff816961a7>] vfs_write+0x327/0x590 fs/read_write.c:584
[<ffffffff816966fb>] ksys_write+0x13b/0x170 fs/read_write.c:637
[<ffffffff84b6ddcf>] do_syscall_x64 arch/x86/entry/common.c:51 [inline]
[<ffffffff84b6ddcf>] do_syscall_64+0x3f/0x110 arch/x86/entry/common.c:82
[<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0x6b

write to /proc/sys/kernel/hung_task_check_interval_secs failed: No such file or directory
write to /proc/sys/kernel/softlockup_all_cpu_backtrace failed: No such file or directory

---
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Next message: Mina Almasry: "[net-next v1 00/16] Device Memory TCP"
Previous message: Jakub Kicinski: "Re: [PATCH net-next v4 0/9] net/smc: implement SMCv2.1 virtual ISM device support"
Next in thread: syzbot: "Re: [syzbot] [arm-msm?] [net?] memory leak in radix_tree_insert"
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